diff --git a/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteClient.java b/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteClient.java
index 15b468a92b..a439e58fff 100644
--- a/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteClient.java
+++ b/google-cloud-bigquerystorage/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteClient.java
@@ -145,7 +145,11 @@ public BigQueryWriteStub getStub() {
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Creates a write stream to the given table.
+   * Creates a write stream to the given table. Additionally, every table has a special COMMITTED
+   * stream named '_default' to which data can be written. This stream doesn't need to be created
+   * using CreateWriteStream. It is a stream that can be used simultaneously by any number of
+   * clients. Data written to this stream is considered committed as soon as an acknowledgement is
+   * received.
    *
    * <p>Sample code:
    *
@@ -174,7 +178,11 @@ public final Stream.WriteStream createWriteStream(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Creates a write stream to the given table.
+   * Creates a write stream to the given table. Additionally, every table has a special COMMITTED
+   * stream named '_default' to which data can be written. This stream doesn't need to be created
+   * using CreateWriteStream. It is a stream that can be used simultaneously by any number of
+   * clients. Data written to this stream is considered committed as soon as an acknowledgement is
+   * received.
    *
    * <p>Sample code:
    *
@@ -202,7 +210,11 @@ public final Stream.WriteStream createWriteStream(String parent, Stream.WriteStr
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Creates a write stream to the given table.
+   * Creates a write stream to the given table. Additionally, every table has a special COMMITTED
+   * stream named '_default' to which data can be written. This stream doesn't need to be created
+   * using CreateWriteStream. It is a stream that can be used simultaneously by any number of
+   * clients. Data written to this stream is considered committed as soon as an acknowledgement is
+   * received.
    *
    * <p>Sample code:
    *
@@ -225,7 +237,11 @@ public final Stream.WriteStream createWriteStream(Storage.CreateWriteStreamReque
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Creates a write stream to the given table.
+   * Creates a write stream to the given table. Additionally, every table has a special COMMITTED
+   * stream named '_default' to which data can be written. This stream doesn't need to be created
+   * using CreateWriteStream. It is a stream that can be used simultaneously by any number of
+   * clients. Data written to this stream is considered committed as soon as an acknowledgement is
+   * received.
    *
    * <p>Sample code:
    *
@@ -390,7 +406,8 @@ public final Stream.WriteStream getWriteStream(Storage.GetWriteStreamRequest req
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Finalize a write stream so that no new data can be appended to the stream.
+   * Finalize a write stream so that no new data can be appended to the stream. Finalize is not
+   * supported on the '_default' stream.
    *
    * <p>Sample code:
    *
@@ -415,7 +432,8 @@ public final Storage.FinalizeWriteStreamResponse finalizeWriteStream(WriteStream
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Finalize a write stream so that no new data can be appended to the stream.
+   * Finalize a write stream so that no new data can be appended to the stream. Finalize is not
+   * supported on the '_default' stream.
    *
    * <p>Sample code:
    *
@@ -438,7 +456,8 @@ public final Storage.FinalizeWriteStreamResponse finalizeWriteStream(String name
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Finalize a write stream so that no new data can be appended to the stream.
+   * Finalize a write stream so that no new data can be appended to the stream. Finalize is not
+   * supported on the '_default' stream.
    *
    * <p>Sample code:
    *
@@ -464,7 +483,8 @@ public final Storage.FinalizeWriteStreamResponse finalizeWriteStream(
 
   // AUTO-GENERATED DOCUMENTATION AND METHOD.
   /**
-   * Finalize a write stream so that no new data can be appended to the stream.
+   * Finalize a write stream so that no new data can be appended to the stream. Finalize is not
+   * supported on the '_default' stream.
    *
    * <p>Sample code:
    *
@@ -603,7 +623,7 @@ public final Storage.BatchCommitWriteStreamsResponse batchCommitWriteStreams(
    * Flushes rows to a BUFFERED stream. If users are appending rows to BUFFERED stream, flush
    * operation is required in order for the rows to become available for reading. A Flush operation
    * flushes up to any previously flushed offset in a BUFFERED stream, to the offset specified in
-   * the request.
+   * the request. Flush is not supported on the _default stream, since it is not BUFFERED.
    *
    * <p>Sample code:
    *
@@ -631,7 +651,7 @@ public final Storage.FlushRowsResponse flushRows(WriteStreamName writeStream) {
    * Flushes rows to a BUFFERED stream. If users are appending rows to BUFFERED stream, flush
    * operation is required in order for the rows to become available for reading. A Flush operation
    * flushes up to any previously flushed offset in a BUFFERED stream, to the offset specified in
-   * the request.
+   * the request. Flush is not supported on the _default stream, since it is not BUFFERED.
    *
    * <p>Sample code:
    *
@@ -657,7 +677,7 @@ public final Storage.FlushRowsResponse flushRows(String writeStream) {
    * Flushes rows to a BUFFERED stream. If users are appending rows to BUFFERED stream, flush
    * operation is required in order for the rows to become available for reading. A Flush operation
    * flushes up to any previously flushed offset in a BUFFERED stream, to the offset specified in
-   * the request.
+   * the request. Flush is not supported on the _default stream, since it is not BUFFERED.
    *
    * <p>Sample code:
    *
@@ -685,7 +705,7 @@ public final Storage.FlushRowsResponse flushRows(Storage.FlushRowsRequest reques
    * Flushes rows to a BUFFERED stream. If users are appending rows to BUFFERED stream, flush
    * operation is required in order for the rows to become available for reading. A Flush operation
    * flushes up to any previously flushed offset in a BUFFERED stream, to the offset specified in
-   * the request.
+   * the request. Flush is not supported on the _default stream, since it is not BUFFERED.
    *
    * <p>Sample code:
    *
diff --git a/grpc-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteGrpc.java b/grpc-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteGrpc.java
index 65bbb090a3..e075df92de 100644
--- a/grpc-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteGrpc.java
+++ b/grpc-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/BigQueryWriteGrpc.java
@@ -28,6 +28,7 @@
 @javax.annotation.Generated(
     value = "by gRPC proto compiler",
     comments = "Source: google/cloud/bigquery/storage/v1alpha2/storage.proto")
+@java.lang.Deprecated
 public final class BigQueryWriteGrpc {
 
   private BigQueryWriteGrpc() {}
@@ -378,6 +379,7 @@ public BigQueryWriteFutureStub newStub(
    * The Write API can be used to write data to BigQuery.
    * </pre>
    */
+  @java.lang.Deprecated
   public abstract static class BigQueryWriteImplBase implements io.grpc.BindableService {
 
     /**
@@ -385,6 +387,11 @@ public abstract static class BigQueryWriteImplBase implements io.grpc.BindableSe
      *
      * <pre>
      * Creates a write stream to the given table.
+     * Additionally, every table has a special COMMITTED stream named '_default'
+     * to which data can be written. This stream doesn't need to be created using
+     * CreateWriteStream. It is a stream that can be used simultaneously by any
+     * number of clients. Data written to this stream is considered committed as
+     * soon as an acknowledgement is received.
      * </pre>
      */
     public void createWriteStream(
@@ -447,7 +454,7 @@ public void getWriteStream(
      *
      * <pre>
      * Finalize a write stream so that no new data can be appended to the
-     * stream.
+     * stream. Finalize is not supported on the '_default' stream.
      * </pre>
      */
     public void finalizeWriteStream(
@@ -488,6 +495,7 @@ public void batchCommitWriteStreams(
      * required in order for the rows to become available for reading. A
      * Flush operation flushes up to any previously flushed offset in a BUFFERED
      * stream, to the offset specified in the request.
+     * Flush is not supported on the _default stream, since it is not BUFFERED.
      * </pre>
      */
     public void flushRows(
@@ -557,6 +565,7 @@ public final io.grpc.ServerServiceDefinition bindService() {
    * The Write API can be used to write data to BigQuery.
    * </pre>
    */
+  @java.lang.Deprecated
   public static final class BigQueryWriteStub
       extends io.grpc.stub.AbstractAsyncStub<BigQueryWriteStub> {
     private BigQueryWriteStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
@@ -573,6 +582,11 @@ protected BigQueryWriteStub build(io.grpc.Channel channel, io.grpc.CallOptions c
      *
      * <pre>
      * Creates a write stream to the given table.
+     * Additionally, every table has a special COMMITTED stream named '_default'
+     * to which data can be written. This stream doesn't need to be created using
+     * CreateWriteStream. It is a stream that can be used simultaneously by any
+     * number of clients. Data written to this stream is considered committed as
+     * soon as an acknowledgement is received.
      * </pre>
      */
     public void createWriteStream(
@@ -639,7 +653,7 @@ public void getWriteStream(
      *
      * <pre>
      * Finalize a write stream so that no new data can be appended to the
-     * stream.
+     * stream. Finalize is not supported on the '_default' stream.
      * </pre>
      */
     public void finalizeWriteStream(
@@ -684,6 +698,7 @@ public void batchCommitWriteStreams(
      * required in order for the rows to become available for reading. A
      * Flush operation flushes up to any previously flushed offset in a BUFFERED
      * stream, to the offset specified in the request.
+     * Flush is not supported on the _default stream, since it is not BUFFERED.
      * </pre>
      */
     public void flushRows(
@@ -704,6 +719,7 @@ public void flushRows(
    * The Write API can be used to write data to BigQuery.
    * </pre>
    */
+  @java.lang.Deprecated
   public static final class BigQueryWriteBlockingStub
       extends io.grpc.stub.AbstractBlockingStub<BigQueryWriteBlockingStub> {
     private BigQueryWriteBlockingStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
@@ -721,6 +737,11 @@ protected BigQueryWriteBlockingStub build(
      *
      * <pre>
      * Creates a write stream to the given table.
+     * Additionally, every table has a special COMMITTED stream named '_default'
+     * to which data can be written. This stream doesn't need to be created using
+     * CreateWriteStream. It is a stream that can be used simultaneously by any
+     * number of clients. Data written to this stream is considered committed as
+     * soon as an acknowledgement is received.
      * </pre>
      */
     public com.google.cloud.bigquery.storage.v1alpha2.Stream.WriteStream createWriteStream(
@@ -747,7 +768,7 @@ public com.google.cloud.bigquery.storage.v1alpha2.Stream.WriteStream getWriteStr
      *
      * <pre>
      * Finalize a write stream so that no new data can be appended to the
-     * stream.
+     * stream. Finalize is not supported on the '_default' stream.
      * </pre>
      */
     public com.google.cloud.bigquery.storage.v1alpha2.Storage.FinalizeWriteStreamResponse
@@ -785,6 +806,7 @@ public com.google.cloud.bigquery.storage.v1alpha2.Stream.WriteStream getWriteStr
      * required in order for the rows to become available for reading. A
      * Flush operation flushes up to any previously flushed offset in a BUFFERED
      * stream, to the offset specified in the request.
+     * Flush is not supported on the _default stream, since it is not BUFFERED.
      * </pre>
      */
     public com.google.cloud.bigquery.storage.v1alpha2.Storage.FlushRowsResponse flushRows(
@@ -802,6 +824,7 @@ public com.google.cloud.bigquery.storage.v1alpha2.Storage.FlushRowsResponse flus
    * The Write API can be used to write data to BigQuery.
    * </pre>
    */
+  @java.lang.Deprecated
   public static final class BigQueryWriteFutureStub
       extends io.grpc.stub.AbstractFutureStub<BigQueryWriteFutureStub> {
     private BigQueryWriteFutureStub(io.grpc.Channel channel, io.grpc.CallOptions callOptions) {
@@ -819,6 +842,11 @@ protected BigQueryWriteFutureStub build(
      *
      * <pre>
      * Creates a write stream to the given table.
+     * Additionally, every table has a special COMMITTED stream named '_default'
+     * to which data can be written. This stream doesn't need to be created using
+     * CreateWriteStream. It is a stream that can be used simultaneously by any
+     * number of clients. Data written to this stream is considered committed as
+     * soon as an acknowledgement is received.
      * </pre>
      */
     public com.google.common.util.concurrent.ListenableFuture<
@@ -849,7 +877,7 @@ protected BigQueryWriteFutureStub build(
      *
      * <pre>
      * Finalize a write stream so that no new data can be appended to the
-     * stream.
+     * stream. Finalize is not supported on the '_default' stream.
      * </pre>
      */
     public com.google.common.util.concurrent.ListenableFuture<
@@ -889,6 +917,7 @@ protected BigQueryWriteFutureStub build(
      * required in order for the rows to become available for reading. A
      * Flush operation flushes up to any previously flushed offset in a BUFFERED
      * stream, to the offset specified in the request.
+     * Flush is not supported on the _default stream, since it is not BUFFERED.
      * </pre>
      */
     public com.google.common.util.concurrent.ListenableFuture<
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Storage.java b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Storage.java
index 559510088f..e478e9aac2 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Storage.java
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Storage.java
@@ -1096,6 +1096,8 @@ public interface AppendRowsRequestOrBuilder
      * Required. The stream that is the target of the append operation. This value must be
      * specified for the initial request. If subsequent requests specify the
      * stream name, it must equal to the value provided in the first request.
+     * To write to the _default stream, populate this field with a string in the
+     * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
      *
      * <code>
@@ -1112,6 +1114,8 @@ public interface AppendRowsRequestOrBuilder
      * Required. The stream that is the target of the append operation. This value must be
      * specified for the initial request. If subsequent requests specify the
      * stream name, it must equal to the value provided in the first request.
+     * To write to the _default stream, populate this field with a string in the
+     * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
      *
      * <code>
@@ -1128,7 +1132,8 @@ public interface AppendRowsRequestOrBuilder
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -1143,7 +1148,8 @@ public interface AppendRowsRequestOrBuilder
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -1158,7 +1164,8 @@ public interface AppendRowsRequestOrBuilder
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -2535,6 +2542,8 @@ public RowsCase getRowsCase() {
      * Required. The stream that is the target of the append operation. This value must be
      * specified for the initial request. If subsequent requests specify the
      * stream name, it must equal to the value provided in the first request.
+     * To write to the _default stream, populate this field with a string in the
+     * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
      *
      * <code>
@@ -2562,6 +2571,8 @@ public java.lang.String getWriteStream() {
      * Required. The stream that is the target of the append operation. This value must be
      * specified for the initial request. If subsequent requests specify the
      * stream name, it must equal to the value provided in the first request.
+     * To write to the _default stream, populate this field with a string in the
+     * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
      *
      * <code>
@@ -2591,7 +2602,8 @@ public com.google.protobuf.ByteString getWriteStreamBytes() {
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -2609,7 +2621,8 @@ public boolean hasOffset() {
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -2627,7 +2640,8 @@ public com.google.protobuf.Int64Value getOffset() {
      * <pre>
      * Optional. If present, the write is only performed if the next append offset is same
      * as the provided value. If not present, the write is performed at the
-     * current end of stream.
+     * current end of stream. Specifying a value for this field is not allowed
+     * when calling AppendRows for the '_default' stream.
      * </pre>
      *
      * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3157,6 +3171,8 @@ public Builder clearRows() {
        * Required. The stream that is the target of the append operation. This value must be
        * specified for the initial request. If subsequent requests specify the
        * stream name, it must equal to the value provided in the first request.
+       * To write to the _default stream, populate this field with a string in the
+       * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
        * </pre>
        *
        * <code>
@@ -3183,6 +3199,8 @@ public java.lang.String getWriteStream() {
        * Required. The stream that is the target of the append operation. This value must be
        * specified for the initial request. If subsequent requests specify the
        * stream name, it must equal to the value provided in the first request.
+       * To write to the _default stream, populate this field with a string in the
+       * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
        * </pre>
        *
        * <code>
@@ -3209,6 +3227,8 @@ public com.google.protobuf.ByteString getWriteStreamBytes() {
        * Required. The stream that is the target of the append operation. This value must be
        * specified for the initial request. If subsequent requests specify the
        * stream name, it must equal to the value provided in the first request.
+       * To write to the _default stream, populate this field with a string in the
+       * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
        * </pre>
        *
        * <code>
@@ -3234,6 +3254,8 @@ public Builder setWriteStream(java.lang.String value) {
        * Required. The stream that is the target of the append operation. This value must be
        * specified for the initial request. If subsequent requests specify the
        * stream name, it must equal to the value provided in the first request.
+       * To write to the _default stream, populate this field with a string in the
+       * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
        * </pre>
        *
        * <code>
@@ -3255,6 +3277,8 @@ public Builder clearWriteStream() {
        * Required. The stream that is the target of the append operation. This value must be
        * specified for the initial request. If subsequent requests specify the
        * stream name, it must equal to the value provided in the first request.
+       * To write to the _default stream, populate this field with a string in the
+       * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
        * </pre>
        *
        * <code>
@@ -3287,7 +3311,8 @@ public Builder setWriteStreamBytes(com.google.protobuf.ByteString value) {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3304,7 +3329,8 @@ public boolean hasOffset() {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3325,7 +3351,8 @@ public com.google.protobuf.Int64Value getOffset() {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3350,7 +3377,8 @@ public Builder setOffset(com.google.protobuf.Int64Value value) {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3372,7 +3400,8 @@ public Builder setOffset(com.google.protobuf.Int64Value.Builder builderForValue)
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3399,7 +3428,8 @@ public Builder mergeOffset(com.google.protobuf.Int64Value value) {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3422,7 +3452,8 @@ public Builder clearOffset() {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3439,7 +3470,8 @@ public com.google.protobuf.Int64Value.Builder getOffsetBuilder() {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3458,7 +3490,8 @@ public com.google.protobuf.Int64ValueOrBuilder getOffsetOrBuilder() {
        * <pre>
        * Optional. If present, the write is only performed if the next append offset is same
        * as the provided value. If not present, the write is performed at the
-       * current end of stream.
+       * current end of stream. Specifying a value for this field is not allowed
+       * when calling AppendRows for the '_default' stream.
        * </pre>
        *
        * <code>.google.protobuf.Int64Value offset = 2 [(.google.api.field_behavior) = OPTIONAL];
@@ -3818,7 +3851,18 @@ public interface AppendRowsResponseOrBuilder
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -3831,7 +3875,18 @@ public interface AppendRowsResponseOrBuilder
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -3844,7 +3899,18 @@ public interface AppendRowsResponseOrBuilder
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -4106,7 +4172,18 @@ public long getOffset() {
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -4122,7 +4199,18 @@ public boolean hasError() {
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -4141,7 +4229,18 @@ public com.google.rpc.Status getError() {
      *
      * <pre>
      * Error in case of append failure. If set, it means rows are not accepted
-     * into the system. Users can retry within the same connection.
+     * into the system. Users can retry or continue with other requests within
+     * the same connection.
+     * ALREADY_EXISTS: happens when offset is specified, it means the row is
+     *   already appended, it is safe to ignore this error.
+     * OUT_OF_RANGE: happens when offset is specified, it means the specified
+     *   offset is beyond the end of the stream.
+     * INVALID_ARGUMENT: error caused by malformed request or data.
+     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+     *   append without offset.
+     * ABORTED: request processing is aborted because of prior failures, request
+     *   can be retried if previous failure is fixed.
+     * INTERNAL: server side errors that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -4714,7 +4813,18 @@ public Builder clearOffset() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4730,7 +4840,18 @@ public boolean hasError() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4756,7 +4877,18 @@ public com.google.rpc.Status getError() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4779,7 +4911,18 @@ public Builder setError(com.google.rpc.Status value) {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4799,7 +4942,18 @@ public Builder setError(com.google.rpc.Status.Builder builderForValue) {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4829,7 +4983,18 @@ public Builder mergeError(com.google.rpc.Status value) {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4855,7 +5020,18 @@ public Builder clearError() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4868,7 +5044,18 @@ public com.google.rpc.Status.Builder getErrorBuilder() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -4889,7 +5076,18 @@ public com.google.rpc.StatusOrBuilder getErrorOrBuilder() {
        *
        * <pre>
        * Error in case of append failure. If set, it means rows are not accepted
-       * into the system. Users can retry within the same connection.
+       * into the system. Users can retry or continue with other requests within
+       * the same connection.
+       * ALREADY_EXISTS: happens when offset is specified, it means the row is
+       *   already appended, it is safe to ignore this error.
+       * OUT_OF_RANGE: happens when offset is specified, it means the specified
+       *   offset is beyond the end of the stream.
+       * INVALID_ARGUMENT: error caused by malformed request or data.
+       * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+       *   append without offset.
+       * ABORTED: request processing is aborted because of prior failures, request
+       *   can be retried if previous failure is fixed.
+       * INTERNAL: server side errors that can be retried.
        * </pre>
        *
        * <code>.google.rpc.Status error = 2;</code>
@@ -10468,7 +10666,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "st\022H\n\014write_stream\030\001 \001(\tB2\340A\002\372A,\n*bigque"
           + "rystorage.googleapis.com/WriteStream\022\016\n\006"
           + "offset\030\002 \001(\003\"#\n\021FlushRowsResponse\022\016\n\006off"
-          + "set\030\001 \001(\0032\250\014\n\rBigQueryWrite\022\351\001\n\021CreateWr"
+          + "set\030\001 \001(\0032\253\014\n\rBigQueryWrite\022\351\001\n\021CreateWr"
           + "iteStream\022@.google.cloud.bigquery.storag"
           + "e.v1alpha2.CreateWriteStreamRequest\0323.go"
           + "ogle.cloud.bigquery.storage.v1alpha2.Wri"
@@ -10503,15 +10701,15 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "y.storage.v1alpha2.FlushRowsResponse\"[\202\323"
           + "\344\223\002F\"A/v1alpha2/{write_stream=projects/*"
           + "/datasets/*/tables/*/streams/*}:\001*\332A\014wri"
-          + "te_stream\032\260\001\312A\036bigquerystorage.googleapi"
-          + "s.com\322A\213\001https://www.googleapis.com/auth"
-          + "/bigquery,https://www.googleapis.com/aut"
-          + "h/bigquery.insertdata,https://www.google"
-          + "apis.com/auth/cloud-platformB{\n*com.goog"
-          + "le.cloud.bigquery.storage.v1alpha2ZMgoog"
-          + "le.golang.org/genproto/googleapis/cloud/"
-          + "bigquery/storage/v1alpha2;storageb\006proto"
-          + "3"
+          + "te_stream\032\263\001\210\002\001\312A\036bigquerystorage.google"
+          + "apis.com\322A\213\001https://www.googleapis.com/a"
+          + "uth/bigquery,https://www.googleapis.com/"
+          + "auth/bigquery.insertdata,https://www.goo"
+          + "gleapis.com/auth/cloud-platformB{\n*com.g"
+          + "oogle.cloud.bigquery.storage.v1alpha2ZMg"
+          + "oogle.golang.org/genproto/googleapis/clo"
+          + "ud/bigquery/storage/v1alpha2;storageb\006pr"
+          + "oto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Stream.java b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Stream.java
index 5e8e6f78c7..a072fab6ad 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Stream.java
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Stream.java
@@ -80,7 +80,8 @@ public interface WriteStreamOrBuilder
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -94,7 +95,8 @@ public interface WriteStreamOrBuilder
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -108,7 +110,8 @@ public interface WriteStreamOrBuilder
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -661,7 +664,8 @@ public com.google.cloud.bigquery.storage.v1alpha2.Stream.WriteStream.Type getTyp
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -678,7 +682,8 @@ public boolean hasCreateTime() {
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -695,7 +700,8 @@ public com.google.protobuf.Timestamp getCreateTime() {
      *
      *
      * <pre>
-     * Output only. Create time of the stream.
+     * Output only. Create time of the stream. For the _default stream, this is the
+     * creation_time of the table.
      * </pre>
      *
      * <code>
@@ -1522,7 +1528,8 @@ public Builder clearType() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1538,7 +1545,8 @@ public boolean hasCreateTime() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1560,7 +1568,8 @@ public com.google.protobuf.Timestamp getCreateTime() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1584,7 +1593,8 @@ public Builder setCreateTime(com.google.protobuf.Timestamp value) {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1605,7 +1615,8 @@ public Builder setCreateTime(com.google.protobuf.Timestamp.Builder builderForVal
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1633,7 +1644,8 @@ public Builder mergeCreateTime(com.google.protobuf.Timestamp value) {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1655,7 +1667,8 @@ public Builder clearCreateTime() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1671,7 +1684,8 @@ public com.google.protobuf.Timestamp.Builder getCreateTimeBuilder() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
@@ -1691,7 +1705,8 @@ public com.google.protobuf.TimestampOrBuilder getCreateTimeOrBuilder() {
        *
        *
        * <pre>
-       * Output only. Create time of the stream.
+       * Output only. Create time of the stream. For the _default stream, this is the
+       * creation_time of the table.
        * </pre>
        *
        * <code>
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Table.java b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Table.java
index 0e33bf8ccb..6b6e6d4bbc 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Table.java
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/java/com/google/cloud/bigquery/storage/v1alpha2/Table.java
@@ -1496,7 +1496,7 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
        *
        *
        * <pre>
-       * Geography object (go/googlesql_geography)
+       * Geography object
        * </pre>
        *
        * <code>GEOGRAPHY = 11;</code>
@@ -1506,7 +1506,7 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
        *
        *
        * <pre>
-       * Numeric value (go/googlesql_numeric)
+       * Numeric value
        * </pre>
        *
        * <code>NUMERIC = 12;</code>
@@ -1629,7 +1629,7 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
        *
        *
        * <pre>
-       * Geography object (go/googlesql_geography)
+       * Geography object
        * </pre>
        *
        * <code>GEOGRAPHY = 11;</code>
@@ -1639,7 +1639,7 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
        *
        *
        * <pre>
-       * Numeric value (go/googlesql_numeric)
+       * Numeric value
        * </pre>
        *
        * <code>NUMERIC = 12;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/protobuf.proto b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/protobuf.proto
index 882adf5b42..63bce1fc9a 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/protobuf.proto
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/protobuf.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/storage.proto b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/storage.proto
index 431f925b39..03c846313d 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/storage.proto
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/storage.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -50,6 +50,7 @@ message CreateWriteStreamRequest {
 //
 // The Write API can be used to write data to BigQuery.
 service BigQueryWrite {
+  option deprecated = true;
   option (google.api.default_host) = "bigquerystorage.googleapis.com";
   option (google.api.oauth_scopes) =
       "https://www.googleapis.com/auth/bigquery,"
@@ -57,6 +58,11 @@ service BigQueryWrite {
       "https://www.googleapis.com/auth/cloud-platform";
 
   // Creates a write stream to the given table.
+  // Additionally, every table has a special COMMITTED stream named '_default'
+  // to which data can be written. This stream doesn't need to be created using
+  // CreateWriteStream. It is a stream that can be used simultaneously by any
+  // number of clients. Data written to this stream is considered committed as
+  // soon as an acknowledgement is received.
   rpc CreateWriteStream(CreateWriteStreamRequest) returns (WriteStream) {
     option (google.api.http) = {
       post: "/v1alpha2/{parent=projects/*/datasets/*/tables/*}"
@@ -102,7 +108,7 @@ service BigQueryWrite {
   }
 
   // Finalize a write stream so that no new data can be appended to the
-  // stream.
+  // stream. Finalize is not supported on the '_default' stream.
   rpc FinalizeWriteStream(FinalizeWriteStreamRequest) returns (FinalizeWriteStreamResponse) {
     option (google.api.http) = {
       post: "/v1alpha2/{name=projects/*/datasets/*/tables/*/streams/*}"
@@ -128,6 +134,7 @@ service BigQueryWrite {
   // required in order for the rows to become available for reading. A
   // Flush operation flushes up to any previously flushed offset in a BUFFERED
   // stream, to the offset specified in the request.
+  // Flush is not supported on the _default stream, since it is not BUFFERED.
   rpc FlushRows(FlushRowsRequest) returns (FlushRowsResponse) {
     option (google.api.http) = {
       post: "/v1alpha2/{write_stream=projects/*/datasets/*/tables/*/streams/*}"
@@ -150,6 +157,8 @@ message AppendRowsRequest {
   // Required. The stream that is the target of the append operation. This value must be
   // specified for the initial request. If subsequent requests specify the
   // stream name, it must equal to the value provided in the first request.
+  // To write to the _default stream, populate this field with a string in the
+  // format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
   string write_stream = 1 [
     (google.api.field_behavior) = REQUIRED,
     (google.api.resource_reference) = {
@@ -159,7 +168,8 @@ message AppendRowsRequest {
 
   // Optional. If present, the write is only performed if the next append offset is same
   // as the provided value. If not present, the write is performed at the
-  // current end of stream.
+  // current end of stream. Specifying a value for this field is not allowed
+  // when calling AppendRows for the '_default' stream.
   google.protobuf.Int64Value offset = 2 [(google.api.field_behavior) = OPTIONAL];
 
   // Input rows. The `writer_schema` field must be specified at the initial
@@ -183,7 +193,18 @@ message AppendRowsResponse {
     int64 offset = 1;
 
     // Error in case of append failure. If set, it means rows are not accepted
-    // into the system. Users can retry within the same connection.
+    // into the system. Users can retry or continue with other requests within
+    // the same connection.
+    // ALREADY_EXISTS: happens when offset is specified, it means the row is
+    //   already appended, it is safe to ignore this error.
+    // OUT_OF_RANGE: happens when offset is specified, it means the specified
+    //   offset is beyond the end of the stream.
+    // INVALID_ARGUMENT: error caused by malformed request or data.
+    // RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
+    //   append without offset.
+    // ABORTED: request processing is aborted because of prior failures, request
+    //   can be retried if previous failure is fixed.
+    // INTERNAL: server side errors that can be retried.
     google.rpc.Status error = 2;
   }
 
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/stream.proto b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/stream.proto
index 0ec0ef81a2..2483e9315b 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/stream.proto
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/stream.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -56,7 +56,8 @@ message WriteStream {
 
   Type type = 2 [(google.api.field_behavior) = IMMUTABLE];
 
-  // Output only. Create time of the stream.
+  // Output only. Create time of the stream. For the _default stream, this is the
+  // creation_time of the table.
   google.protobuf.Timestamp create_time = 3 [(google.api.field_behavior) = OUTPUT_ONLY];
 
   // Output only. Commit time of the stream.
diff --git a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/table.proto b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/table.proto
index d4bc017165..a3e7ad48a0 100644
--- a/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/table.proto
+++ b/proto-google-cloud-bigquerystorage-v1alpha2/src/main/proto/google/cloud/bigquery/storage/v1alpha2/table.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -63,10 +63,10 @@ message TableFieldSchema {
     // Combination of civil date and civil time
     DATETIME = 10;
 
-    // Geography object (go/googlesql_geography)
+    // Geography object
     GEOGRAPHY = 11;
 
-    // Numeric value (go/googlesql_numeric)
+    // Numeric value
     NUMERIC = 12;
   }
 
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/clirr-ignored-differences.xml b/proto-google-cloud-bigquerystorage-v1beta2/clirr-ignored-differences.xml
index 78fef92e9f..6e03637b76 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/clirr-ignored-differences.xml
+++ b/proto-google-cloud-bigquerystorage-v1beta2/clirr-ignored-differences.xml
@@ -4,17 +4,17 @@
     <!-- Allow below protobuf changes as non-breaking-->
     <difference>
         <differenceType>7012</differenceType>
-        <className>com/google/cloud/bigquery/storage/v1/*OrBuilder</className>
+        <className>com/google/cloud/bigquery/storage/v1beta2/*OrBuilder</className>
         <method>* get*(*)</method>
     </difference>
     <difference>
         <differenceType>7012</differenceType>
-        <className>com/google/cloud/bigquery/storage/v1/*OrBuilder</className>
+        <className>com/google/cloud/bigquery/storage/v1beta2/*OrBuilder</className>
         <method>boolean contains*(*)</method>
     </difference>
     <difference>
         <differenceType>7012</differenceType>
-        <className>com/google/cloud/bigquery/storage/v1/*OrBuilder</className>
+        <className>com/google/cloud/bigquery/storage/v1beta2/*OrBuilder</className>
         <method>boolean has*(*)</method>
     </difference>
 </differences>
\ No newline at end of file
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequest.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequest.java
index d42a64264c..602f184958 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequest.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequest.java
@@ -1312,9 +1312,9 @@ public RowsCase getRowsCase() {
    *
    *
    * <pre>
-   * Required. The stream that is the target of the append operation. This value
-   * must be specified for the initial request. If subsequent requests specify
-   * the stream name, it must equal to the value provided in the first request.
+   * Required. The stream that is the target of the append operation. This value must be
+   * specified for the initial request. If subsequent requests specify the
+   * stream name, it must equal to the value provided in the first request.
    * To write to the _default stream, populate this field with a string in the
    * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
    * </pre>
@@ -1341,9 +1341,9 @@ public java.lang.String getWriteStream() {
    *
    *
    * <pre>
-   * Required. The stream that is the target of the append operation. This value
-   * must be specified for the initial request. If subsequent requests specify
-   * the stream name, it must equal to the value provided in the first request.
+   * Required. The stream that is the target of the append operation. This value must be
+   * specified for the initial request. If subsequent requests specify the
+   * stream name, it must equal to the value provided in the first request.
    * To write to the _default stream, populate this field with a string in the
    * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
    * </pre>
@@ -1966,9 +1966,9 @@ public Builder clearRows() {
      *
      *
      * <pre>
-     * Required. The stream that is the target of the append operation. This value
-     * must be specified for the initial request. If subsequent requests specify
-     * the stream name, it must equal to the value provided in the first request.
+     * Required. The stream that is the target of the append operation. This value must be
+     * specified for the initial request. If subsequent requests specify the
+     * stream name, it must equal to the value provided in the first request.
      * To write to the _default stream, populate this field with a string in the
      * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
@@ -1994,9 +1994,9 @@ public java.lang.String getWriteStream() {
      *
      *
      * <pre>
-     * Required. The stream that is the target of the append operation. This value
-     * must be specified for the initial request. If subsequent requests specify
-     * the stream name, it must equal to the value provided in the first request.
+     * Required. The stream that is the target of the append operation. This value must be
+     * specified for the initial request. If subsequent requests specify the
+     * stream name, it must equal to the value provided in the first request.
      * To write to the _default stream, populate this field with a string in the
      * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
@@ -2022,9 +2022,9 @@ public com.google.protobuf.ByteString getWriteStreamBytes() {
      *
      *
      * <pre>
-     * Required. The stream that is the target of the append operation. This value
-     * must be specified for the initial request. If subsequent requests specify
-     * the stream name, it must equal to the value provided in the first request.
+     * Required. The stream that is the target of the append operation. This value must be
+     * specified for the initial request. If subsequent requests specify the
+     * stream name, it must equal to the value provided in the first request.
      * To write to the _default stream, populate this field with a string in the
      * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
@@ -2049,9 +2049,9 @@ public Builder setWriteStream(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. The stream that is the target of the append operation. This value
-     * must be specified for the initial request. If subsequent requests specify
-     * the stream name, it must equal to the value provided in the first request.
+     * Required. The stream that is the target of the append operation. This value must be
+     * specified for the initial request. If subsequent requests specify the
+     * stream name, it must equal to the value provided in the first request.
      * To write to the _default stream, populate this field with a string in the
      * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
@@ -2072,9 +2072,9 @@ public Builder clearWriteStream() {
      *
      *
      * <pre>
-     * Required. The stream that is the target of the append operation. This value
-     * must be specified for the initial request. If subsequent requests specify
-     * the stream name, it must equal to the value provided in the first request.
+     * Required. The stream that is the target of the append operation. This value must be
+     * specified for the initial request. If subsequent requests specify the
+     * stream name, it must equal to the value provided in the first request.
      * To write to the _default stream, populate this field with a string in the
      * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
      * </pre>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequestOrBuilder.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequestOrBuilder.java
index fb9bb565f1..8b721dcaf2 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequestOrBuilder.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsRequestOrBuilder.java
@@ -27,9 +27,9 @@ public interface AppendRowsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The stream that is the target of the append operation. This value
-   * must be specified for the initial request. If subsequent requests specify
-   * the stream name, it must equal to the value provided in the first request.
+   * Required. The stream that is the target of the append operation. This value must be
+   * specified for the initial request. If subsequent requests specify the
+   * stream name, it must equal to the value provided in the first request.
    * To write to the _default stream, populate this field with a string in the
    * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
    * </pre>
@@ -45,9 +45,9 @@ public interface AppendRowsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. The stream that is the target of the append operation. This value
-   * must be specified for the initial request. If subsequent requests specify
-   * the stream name, it must equal to the value provided in the first request.
+   * Required. The stream that is the target of the append operation. This value must be
+   * specified for the initial request. If subsequent requests specify the
+   * stream name, it must equal to the value provided in the first request.
    * To write to the _default stream, populate this field with a string in the
    * format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
    * </pre>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponse.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponse.java
index 9edad09966..d710849ff2 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponse.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponse.java
@@ -204,7 +204,7 @@ public interface AppendResultOrBuilder
    *
    *
    * <pre>
-   * A success append result.
+   * AppendResult is returned for successful append requests.
    * </pre>
    *
    * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.AppendRowsResponse.AppendResult}
@@ -526,7 +526,7 @@ protected Builder newBuilderForType(
      *
      *
      * <pre>
-     * A success append result.
+     * AppendResult is returned for successful append requests.
      * </pre>
      *
      * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.AppendRowsResponse.AppendResult}
@@ -1057,19 +1057,20 @@ public boolean hasAppendResult() {
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -1084,19 +1085,20 @@ public boolean hasError() {
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -1114,19 +1116,20 @@ public com.google.rpc.Status getError() {
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -1146,8 +1149,8 @@ public com.google.rpc.StatusOrBuilder getErrorOrBuilder() {
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -1163,8 +1166,8 @@ public boolean hasUpdatedSchema() {
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -1182,8 +1185,8 @@ public com.google.cloud.bigquery.storage.v1beta2.TableSchema getUpdatedSchema()
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -1867,19 +1870,20 @@ public Builder clearAppendResult() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -1894,19 +1898,20 @@ public boolean hasError() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -1931,19 +1936,20 @@ public com.google.rpc.Status getError() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -1965,19 +1971,20 @@ public Builder setError(com.google.rpc.Status value) {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -1996,19 +2003,20 @@ public Builder setError(com.google.rpc.Status.Builder builderForValue) {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -2037,19 +2045,20 @@ public Builder mergeError(com.google.rpc.Status value) {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -2074,19 +2083,20 @@ public Builder clearError() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -2098,19 +2108,20 @@ public com.google.rpc.Status.Builder getErrorBuilder() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -2130,19 +2141,20 @@ public com.google.rpc.StatusOrBuilder getErrorOrBuilder() {
      *
      *
      * <pre>
-     * Error in case of request failed. If set, it means rows are not accepted
-     * into the system. Users can retry or continue with other requests within
-     * the same connection.
-     * ALREADY_EXISTS: happens when offset is specified, it means the entire
-     *   request is already appended, it is safe to ignore this error.
-     * OUT_OF_RANGE: happens when offset is specified, it means the specified
-     *   offset is beyond the end of the stream.
-     * INVALID_ARGUMENT: error caused by malformed request or data.
-     * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-     *   append without offset.
-     * ABORTED: request processing is aborted because of prior failures, request
-     *   can be retried if previous failure is fixed.
-     * INTERNAL: server side errors that can be retried.
+     * Error returned when problems were encountered.  If present,
+     * it indicates rows were not accepted into the system.
+     * Users can retry or continue with other append requests within the
+     * same connection.
+     * Additional information about error signalling:
+     * ALREADY_EXISTS: Happens when an append specified an offset, and the
+     * backend already has received data at this offset.  Typically encountered
+     * in retry scenarios, and can be ignored.
+     * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+     * the current end of the stream.
+     * INVALID_ARGUMENT: Indicates a malformed request or data.
+     * ABORTED: Request processing is aborted because of prior failures.  The
+     * request can be retried if previous failure is addressed.
+     * INTERNAL: Indicates server side error(s) that can be retried.
      * </pre>
      *
      * <code>.google.rpc.Status error = 2;</code>
@@ -2179,8 +2191,8 @@ public com.google.rpc.StatusOrBuilder getErrorOrBuilder() {
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2195,8 +2207,8 @@ public boolean hasUpdatedSchema() {
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2217,8 +2229,8 @@ public com.google.cloud.bigquery.storage.v1beta2.TableSchema getUpdatedSchema()
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2241,8 +2253,8 @@ public Builder setUpdatedSchema(com.google.cloud.bigquery.storage.v1beta2.TableS
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2263,8 +2275,8 @@ public Builder setUpdatedSchema(
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2291,8 +2303,8 @@ public Builder mergeUpdatedSchema(com.google.cloud.bigquery.storage.v1beta2.Tabl
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2313,8 +2325,8 @@ public Builder clearUpdatedSchema() {
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2329,8 +2341,8 @@ public com.google.cloud.bigquery.storage.v1beta2.TableSchema.Builder getUpdatedS
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -2350,8 +2362,8 @@ public com.google.cloud.bigquery.storage.v1beta2.TableSchema.Builder getUpdatedS
      *
      * <pre>
      * If backend detects a schema update, pass it to user so that user can
-     * use it to input new type of message. It will be empty when there is no
-     * schema updates.
+     * use it to input new type of message. It will be empty when no schema
+     * updates have occurred.
      * </pre>
      *
      * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponseOrBuilder.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponseOrBuilder.java
index fe320fb6c5..5d920cd579 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponseOrBuilder.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/AppendRowsResponseOrBuilder.java
@@ -66,19 +66,20 @@ public interface AppendRowsResponseOrBuilder
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -90,19 +91,20 @@ public interface AppendRowsResponseOrBuilder
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -114,19 +116,20 @@ public interface AppendRowsResponseOrBuilder
    *
    *
    * <pre>
-   * Error in case of request failed. If set, it means rows are not accepted
-   * into the system. Users can retry or continue with other requests within
-   * the same connection.
-   * ALREADY_EXISTS: happens when offset is specified, it means the entire
-   *   request is already appended, it is safe to ignore this error.
-   * OUT_OF_RANGE: happens when offset is specified, it means the specified
-   *   offset is beyond the end of the stream.
-   * INVALID_ARGUMENT: error caused by malformed request or data.
-   * RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-   *   append without offset.
-   * ABORTED: request processing is aborted because of prior failures, request
-   *   can be retried if previous failure is fixed.
-   * INTERNAL: server side errors that can be retried.
+   * Error returned when problems were encountered.  If present,
+   * it indicates rows were not accepted into the system.
+   * Users can retry or continue with other append requests within the
+   * same connection.
+   * Additional information about error signalling:
+   * ALREADY_EXISTS: Happens when an append specified an offset, and the
+   * backend already has received data at this offset.  Typically encountered
+   * in retry scenarios, and can be ignored.
+   * OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+   * the current end of the stream.
+   * INVALID_ARGUMENT: Indicates a malformed request or data.
+   * ABORTED: Request processing is aborted because of prior failures.  The
+   * request can be retried if previous failure is addressed.
+   * INTERNAL: Indicates server side error(s) that can be retried.
    * </pre>
    *
    * <code>.google.rpc.Status error = 2;</code>
@@ -138,8 +141,8 @@ public interface AppendRowsResponseOrBuilder
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -152,8 +155,8 @@ public interface AppendRowsResponseOrBuilder
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
@@ -166,8 +169,8 @@ public interface AppendRowsResponseOrBuilder
    *
    * <pre>
    * If backend detects a schema update, pass it to user so that user can
-   * use it to input new type of message. It will be empty when there is no
-   * schema updates.
+   * use it to input new type of message. It will be empty when no schema
+   * updates have occurred.
    * </pre>
    *
    * <code>.google.cloud.bigquery.storage.v1beta2.TableSchema updated_schema = 3;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequest.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequest.java
index c271b1d3cb..fe6826a739 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequest.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequest.java
@@ -133,8 +133,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    *
    * <pre>
-   * Required. Parent table that all the streams should belong to, in the form
-   * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+   * Required. Parent table that all the streams should belong to, in the form of
+   * `projects/{project}/datasets/{dataset}/tables/{table}`.
    * </pre>
    *
    * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -157,8 +157,8 @@ public java.lang.String getParent() {
    *
    *
    * <pre>
-   * Required. Parent table that all the streams should belong to, in the form
-   * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+   * Required. Parent table that all the streams should belong to, in the form of
+   * `projects/{project}/datasets/{dataset}/tables/{table}`.
    * </pre>
    *
    * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -611,8 +611,8 @@ public Builder mergeFrom(
      *
      *
      * <pre>
-     * Required. Parent table that all the streams should belong to, in the form
-     * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+     * Required. Parent table that all the streams should belong to, in the form of
+     * `projects/{project}/datasets/{dataset}/tables/{table}`.
      * </pre>
      *
      * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -634,8 +634,8 @@ public java.lang.String getParent() {
      *
      *
      * <pre>
-     * Required. Parent table that all the streams should belong to, in the form
-     * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+     * Required. Parent table that all the streams should belong to, in the form of
+     * `projects/{project}/datasets/{dataset}/tables/{table}`.
      * </pre>
      *
      * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -657,8 +657,8 @@ public com.google.protobuf.ByteString getParentBytes() {
      *
      *
      * <pre>
-     * Required. Parent table that all the streams should belong to, in the form
-     * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+     * Required. Parent table that all the streams should belong to, in the form of
+     * `projects/{project}/datasets/{dataset}/tables/{table}`.
      * </pre>
      *
      * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -679,8 +679,8 @@ public Builder setParent(java.lang.String value) {
      *
      *
      * <pre>
-     * Required. Parent table that all the streams should belong to, in the form
-     * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+     * Required. Parent table that all the streams should belong to, in the form of
+     * `projects/{project}/datasets/{dataset}/tables/{table}`.
      * </pre>
      *
      * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -697,8 +697,8 @@ public Builder clearParent() {
      *
      *
      * <pre>
-     * Required. Parent table that all the streams should belong to, in the form
-     * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+     * Required. Parent table that all the streams should belong to, in the form of
+     * `projects/{project}/datasets/{dataset}/tables/{table}`.
      * </pre>
      *
      * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequestOrBuilder.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequestOrBuilder.java
index f51b28293a..d06e88a517 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequestOrBuilder.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsRequestOrBuilder.java
@@ -27,8 +27,8 @@ public interface BatchCommitWriteStreamsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. Parent table that all the streams should belong to, in the form
-   * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+   * Required. Parent table that all the streams should belong to, in the form of
+   * `projects/{project}/datasets/{dataset}/tables/{table}`.
    * </pre>
    *
    * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
@@ -40,8 +40,8 @@ public interface BatchCommitWriteStreamsRequestOrBuilder
    *
    *
    * <pre>
-   * Required. Parent table that all the streams should belong to, in the form
-   * of `projects/{project}/datasets/{dataset}/tables/{table}`.
+   * Required. Parent table that all the streams should belong to, in the form of
+   * `projects/{project}/datasets/{dataset}/tables/{table}`.
    * </pre>
    *
    * <code>string parent = 1 [(.google.api.field_behavior) = REQUIRED];</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponse.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponse.java
index 0fa6c5e7c5..3f30a674f0 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponse.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponse.java
@@ -146,7 +146,8 @@ public static final com.google.protobuf.Descriptors.Descriptor getDescriptor() {
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -162,7 +163,8 @@ public boolean hasCommitTime() {
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -178,7 +180,8 @@ public com.google.protobuf.Timestamp getCommitTime() {
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -196,6 +199,9 @@ public com.google.protobuf.TimestampOrBuilder getCommitTimeOrBuilder() {
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -211,6 +217,9 @@ public com.google.protobuf.TimestampOrBuilder getCommitTimeOrBuilder() {
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -226,6 +235,9 @@ public com.google.protobuf.TimestampOrBuilder getCommitTimeOrBuilder() {
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -240,6 +252,9 @@ public int getStreamErrorsCount() {
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -254,6 +269,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageError getStreamErrors(in
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -678,7 +696,8 @@ public Builder mergeFrom(
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -693,7 +712,8 @@ public boolean hasCommitTime() {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -714,7 +734,8 @@ public com.google.protobuf.Timestamp getCommitTime() {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -737,7 +758,8 @@ public Builder setCommitTime(com.google.protobuf.Timestamp value) {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -757,7 +779,8 @@ public Builder setCommitTime(com.google.protobuf.Timestamp.Builder builderForVal
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -782,7 +805,8 @@ public Builder mergeCommitTime(com.google.protobuf.Timestamp value) {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -803,7 +827,8 @@ public Builder clearCommitTime() {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -818,7 +843,8 @@ public com.google.protobuf.Timestamp.Builder getCommitTimeBuilder() {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -837,7 +863,8 @@ public com.google.protobuf.TimestampOrBuilder getCommitTimeOrBuilder() {
      *
      * <pre>
      * The time at which streams were committed in microseconds granularity.
-     * This field will only exist when there is no stream errors.
+     * This field will only exist when there are no stream errors.
+     * **Note** if this field is not set, it means the commit was not successful.
      * </pre>
      *
      * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -883,6 +910,9 @@ private void ensureStreamErrorsIsMutable() {
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -901,6 +931,9 @@ private void ensureStreamErrorsIsMutable() {
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -918,6 +951,9 @@ public int getStreamErrorsCount() {
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -935,6 +971,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageError getStreamErrors(in
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -959,6 +998,9 @@ public Builder setStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -980,6 +1022,9 @@ public Builder setStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1003,6 +1048,9 @@ public Builder addStreamErrors(com.google.cloud.bigquery.storage.v1beta2.Storage
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1027,6 +1075,9 @@ public Builder addStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1048,6 +1099,9 @@ public Builder addStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1069,6 +1123,9 @@ public Builder addStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1091,6 +1148,9 @@ public Builder addAllStreamErrors(
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1111,6 +1171,9 @@ public Builder clearStreamErrors() {
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1131,6 +1194,9 @@ public Builder removeStreamErrors(int index) {
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1145,6 +1211,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageError.Builder getStreamE
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1163,6 +1232,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageErrorOrBuilder getStream
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1181,6 +1253,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageErrorOrBuilder getStream
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1195,6 +1270,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageError.Builder addStreamE
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -1211,6 +1289,9 @@ public com.google.cloud.bigquery.storage.v1beta2.StorageError.Builder addStreamE
      * <pre>
      * Stream level error if commit failed. Only streams with error will be in
      * the list.
+     * If empty, there is no error and all streams are committed successfully.
+     * If non empty, certain streams have errors and ZERO stream is committed due
+     * to atomicity guarantee.
      * </pre>
      *
      * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponseOrBuilder.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponseOrBuilder.java
index 77dea40ef7..4ee30d3923 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponseOrBuilder.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/BatchCommitWriteStreamsResponseOrBuilder.java
@@ -28,7 +28,8 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -41,7 +42,8 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -54,7 +56,8 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    *
    * <pre>
    * The time at which streams were committed in microseconds granularity.
-   * This field will only exist when there is no stream errors.
+   * This field will only exist when there are no stream errors.
+   * **Note** if this field is not set, it means the commit was not successful.
    * </pre>
    *
    * <code>.google.protobuf.Timestamp commit_time = 1;</code>
@@ -67,6 +70,9 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -78,6 +84,9 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -89,6 +98,9 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -100,6 +112,9 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
@@ -112,6 +127,9 @@ public interface BatchCommitWriteStreamsResponseOrBuilder
    * <pre>
    * Stream level error if commit failed. Only streams with error will be in
    * the list.
+   * If empty, there is no error and all streams are committed successfully.
+   * If non empty, certain streams have errors and ZERO stream is committed due
+   * to atomicity guarantee.
    * </pre>
    *
    * <code>repeated .google.cloud.bigquery.storage.v1beta2.StorageError stream_errors = 2;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoRows.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoRows.java
index 911bc53151..2792f31b13 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoRows.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoRows.java
@@ -18,15 +18,7 @@
 
 package com.google.cloud.bigquery.storage.v1beta2;
 
-/**
- *
- *
- * <pre>
- * Protobuf rows.
- * </pre>
- *
- * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoRows}
- */
+/** Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoRows} */
 public final class ProtoRows extends com.google.protobuf.GeneratedMessageV3
     implements
     // @@protoc_insertion_point(message_implements:google.cloud.bigquery.storage.v1beta2.ProtoRows)
@@ -337,15 +329,7 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
     Builder builder = new Builder(parent);
     return builder;
   }
-  /**
-   *
-   *
-   * <pre>
-   * Protobuf rows.
-   * </pre>
-   *
-   * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoRows}
-   */
+  /** Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoRows} */
   public static final class Builder extends com.google.protobuf.GeneratedMessageV3.Builder<Builder>
       implements
       // @@protoc_insertion_point(builder_implements:google.cloud.bigquery.storage.v1beta2.ProtoRows)
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoSchema.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoSchema.java
index 0dd9c16c4e..3f4c55002a 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoSchema.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ProtoSchema.java
@@ -22,7 +22,7 @@
  *
  *
  * <pre>
- * Protobuf schema is an API presentation the proto buffer schema.
+ * ProtoSchema describes the schema of the serialized protocol buffer data rows.
  * </pre>
  *
  * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoSchema}
@@ -349,7 +349,7 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    *
    * <pre>
-   * Protobuf schema is an API presentation the proto buffer schema.
+   * ProtoSchema describes the schema of the serialized protocol buffer data rows.
    * </pre>
    *
    * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.ProtoSchema}
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponse.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponse.java
index a569e1c6d2..e7f68eba50 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponse.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponse.java
@@ -146,6 +146,44 @@ private ReadRowsResponse(
               rowCount_ = input.readInt64();
               break;
             }
+          case 58:
+            {
+              com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder subBuilder = null;
+              if (schemaCase_ == 7) {
+                subBuilder =
+                    ((com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_).toBuilder();
+              }
+              schema_ =
+                  input.readMessage(
+                      com.google.cloud.bigquery.storage.v1beta2.AvroSchema.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(
+                    (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_);
+                schema_ = subBuilder.buildPartial();
+              }
+              schemaCase_ = 7;
+              break;
+            }
+          case 66:
+            {
+              com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder subBuilder = null;
+              if (schemaCase_ == 8) {
+                subBuilder =
+                    ((com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_).toBuilder();
+              }
+              schema_ =
+                  input.readMessage(
+                      com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.parser(),
+                      extensionRegistry);
+              if (subBuilder != null) {
+                subBuilder.mergeFrom(
+                    (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_);
+                schema_ = subBuilder.buildPartial();
+              }
+              schemaCase_ = 8;
+              break;
+            }
           default:
             {
               if (!parseUnknownField(input, unknownFields, extensionRegistry, tag)) {
@@ -227,6 +265,53 @@ public RowsCase getRowsCase() {
     return RowsCase.forNumber(rowsCase_);
   }
 
+  private int schemaCase_ = 0;
+  private java.lang.Object schema_;
+
+  public enum SchemaCase
+      implements
+          com.google.protobuf.Internal.EnumLite,
+          com.google.protobuf.AbstractMessage.InternalOneOfEnum {
+    AVRO_SCHEMA(7),
+    ARROW_SCHEMA(8),
+    SCHEMA_NOT_SET(0);
+    private final int value;
+
+    private SchemaCase(int value) {
+      this.value = value;
+    }
+    /**
+     * @param value The number of the enum to look for.
+     * @return The enum associated with the given number.
+     * @deprecated Use {@link #forNumber(int)} instead.
+     */
+    @java.lang.Deprecated
+    public static SchemaCase valueOf(int value) {
+      return forNumber(value);
+    }
+
+    public static SchemaCase forNumber(int value) {
+      switch (value) {
+        case 7:
+          return AVRO_SCHEMA;
+        case 8:
+          return ARROW_SCHEMA;
+        case 0:
+          return SCHEMA_NOT_SET;
+        default:
+          return null;
+      }
+    }
+
+    public int getNumber() {
+      return this.value;
+    }
+  };
+
+  public SchemaCase getSchemaCase() {
+    return SchemaCase.forNumber(schemaCase_);
+  }
+
   public static final int AVRO_ROWS_FIELD_NUMBER = 3;
   /**
    *
@@ -448,6 +533,120 @@ public com.google.cloud.bigquery.storage.v1beta2.ThrottleState getThrottleState(
     return getThrottleState();
   }
 
+  public static final int AVRO_SCHEMA_FIELD_NUMBER = 7;
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return Whether the avroSchema field is set.
+   */
+  @java.lang.Override
+  public boolean hasAvroSchema() {
+    return schemaCase_ == 7;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return The avroSchema.
+   */
+  @java.lang.Override
+  public com.google.cloud.bigquery.storage.v1beta2.AvroSchema getAvroSchema() {
+    if (schemaCase_ == 7) {
+      return (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_;
+    }
+    return com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder getAvroSchemaOrBuilder() {
+    if (schemaCase_ == 7) {
+      return (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_;
+    }
+    return com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+  }
+
+  public static final int ARROW_SCHEMA_FIELD_NUMBER = 8;
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return Whether the arrowSchema field is set.
+   */
+  @java.lang.Override
+  public boolean hasArrowSchema() {
+    return schemaCase_ == 8;
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return The arrowSchema.
+   */
+  @java.lang.Override
+  public com.google.cloud.bigquery.storage.v1beta2.ArrowSchema getArrowSchema() {
+    if (schemaCase_ == 8) {
+      return (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_;
+    }
+    return com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+  }
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   */
+  @java.lang.Override
+  public com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder getArrowSchemaOrBuilder() {
+    if (schemaCase_ == 8) {
+      return (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_;
+    }
+    return com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+  }
+
   private byte memoizedIsInitialized = -1;
 
   @java.lang.Override
@@ -477,6 +676,12 @@ public void writeTo(com.google.protobuf.CodedOutputStream output) throws java.io
     if (rowCount_ != 0L) {
       output.writeInt64(6, rowCount_);
     }
+    if (schemaCase_ == 7) {
+      output.writeMessage(7, (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_);
+    }
+    if (schemaCase_ == 8) {
+      output.writeMessage(8, (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_);
+    }
     unknownFields.writeTo(output);
   }
 
@@ -505,6 +710,16 @@ public int getSerializedSize() {
     if (rowCount_ != 0L) {
       size += com.google.protobuf.CodedOutputStream.computeInt64Size(6, rowCount_);
     }
+    if (schemaCase_ == 7) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              7, (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_);
+    }
+    if (schemaCase_ == 8) {
+      size +=
+          com.google.protobuf.CodedOutputStream.computeMessageSize(
+              8, (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_);
+    }
     size += unknownFields.getSerializedSize();
     memoizedSize = size;
     return size;
@@ -541,6 +756,17 @@ public boolean equals(final java.lang.Object obj) {
       case 0:
       default:
     }
+    if (!getSchemaCase().equals(other.getSchemaCase())) return false;
+    switch (schemaCase_) {
+      case 7:
+        if (!getAvroSchema().equals(other.getAvroSchema())) return false;
+        break;
+      case 8:
+        if (!getArrowSchema().equals(other.getArrowSchema())) return false;
+        break;
+      case 0:
+      default:
+    }
     if (!unknownFields.equals(other.unknownFields)) return false;
     return true;
   }
@@ -574,6 +800,18 @@ public int hashCode() {
       case 0:
       default:
     }
+    switch (schemaCase_) {
+      case 7:
+        hash = (37 * hash) + AVRO_SCHEMA_FIELD_NUMBER;
+        hash = (53 * hash) + getAvroSchema().hashCode();
+        break;
+      case 8:
+        hash = (37 * hash) + ARROW_SCHEMA_FIELD_NUMBER;
+        hash = (53 * hash) + getArrowSchema().hashCode();
+        break;
+      case 0:
+      default:
+    }
     hash = (29 * hash) + unknownFields.hashCode();
     memoizedHashCode = hash;
     return hash;
@@ -737,6 +975,8 @@ public Builder clear() {
       }
       rowsCase_ = 0;
       rows_ = null;
+      schemaCase_ = 0;
+      schema_ = null;
       return this;
     }
 
@@ -789,7 +1029,22 @@ public com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse buildPartial()
       } else {
         result.throttleState_ = throttleStateBuilder_.build();
       }
+      if (schemaCase_ == 7) {
+        if (avroSchemaBuilder_ == null) {
+          result.schema_ = schema_;
+        } else {
+          result.schema_ = avroSchemaBuilder_.build();
+        }
+      }
+      if (schemaCase_ == 8) {
+        if (arrowSchemaBuilder_ == null) {
+          result.schema_ = schema_;
+        } else {
+          result.schema_ = arrowSchemaBuilder_.build();
+        }
+      }
       result.rowsCase_ = rowsCase_;
+      result.schemaCase_ = schemaCase_;
       onBuilt();
       return result;
     }
@@ -865,6 +1120,22 @@ public Builder mergeFrom(com.google.cloud.bigquery.storage.v1beta2.ReadRowsRespo
             break;
           }
       }
+      switch (other.getSchemaCase()) {
+        case AVRO_SCHEMA:
+          {
+            mergeAvroSchema(other.getAvroSchema());
+            break;
+          }
+        case ARROW_SCHEMA:
+          {
+            mergeArrowSchema(other.getArrowSchema());
+            break;
+          }
+        case SCHEMA_NOT_SET:
+          {
+            break;
+          }
+      }
       this.mergeUnknownFields(other.unknownFields);
       onChanged();
       return this;
@@ -909,6 +1180,20 @@ public Builder clearRows() {
       return this;
     }
 
+    private int schemaCase_ = 0;
+    private java.lang.Object schema_;
+
+    public SchemaCase getSchemaCase() {
+      return SchemaCase.forNumber(schemaCase_);
+    }
+
+    public Builder clearSchema() {
+      schemaCase_ = 0;
+      schema_ = null;
+      onChanged();
+      return this;
+    }
+
     private com.google.protobuf.SingleFieldBuilderV3<
             com.google.cloud.bigquery.storage.v1beta2.AvroRows,
             com.google.cloud.bigquery.storage.v1beta2.AvroRows.Builder,
@@ -1769,6 +2054,463 @@ public Builder clearThrottleState() {
       return throttleStateBuilder_;
     }
 
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchema,
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder,
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder>
+        avroSchemaBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     *
+     * @return Whether the avroSchema field is set.
+     */
+    @java.lang.Override
+    public boolean hasAvroSchema() {
+      return schemaCase_ == 7;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     *
+     * @return The avroSchema.
+     */
+    @java.lang.Override
+    public com.google.cloud.bigquery.storage.v1beta2.AvroSchema getAvroSchema() {
+      if (avroSchemaBuilder_ == null) {
+        if (schemaCase_ == 7) {
+          return (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_;
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+      } else {
+        if (schemaCase_ == 7) {
+          return avroSchemaBuilder_.getMessage();
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder setAvroSchema(com.google.cloud.bigquery.storage.v1beta2.AvroSchema value) {
+      if (avroSchemaBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        schema_ = value;
+        onChanged();
+      } else {
+        avroSchemaBuilder_.setMessage(value);
+      }
+      schemaCase_ = 7;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder setAvroSchema(
+        com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder builderForValue) {
+      if (avroSchemaBuilder_ == null) {
+        schema_ = builderForValue.build();
+        onChanged();
+      } else {
+        avroSchemaBuilder_.setMessage(builderForValue.build());
+      }
+      schemaCase_ = 7;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder mergeAvroSchema(com.google.cloud.bigquery.storage.v1beta2.AvroSchema value) {
+      if (avroSchemaBuilder_ == null) {
+        if (schemaCase_ == 7
+            && schema_
+                != com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance()) {
+          schema_ =
+              com.google.cloud.bigquery.storage.v1beta2.AvroSchema.newBuilder(
+                      (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          schema_ = value;
+        }
+        onChanged();
+      } else {
+        if (schemaCase_ == 7) {
+          avroSchemaBuilder_.mergeFrom(value);
+        }
+        avroSchemaBuilder_.setMessage(value);
+      }
+      schemaCase_ = 7;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder clearAvroSchema() {
+      if (avroSchemaBuilder_ == null) {
+        if (schemaCase_ == 7) {
+          schemaCase_ = 0;
+          schema_ = null;
+          onChanged();
+        }
+      } else {
+        if (schemaCase_ == 7) {
+          schemaCase_ = 0;
+          schema_ = null;
+        }
+        avroSchemaBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder getAvroSchemaBuilder() {
+      return getAvroSchemaFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder getAvroSchemaOrBuilder() {
+      if ((schemaCase_ == 7) && (avroSchemaBuilder_ != null)) {
+        return avroSchemaBuilder_.getMessageOrBuilder();
+      } else {
+        if (schemaCase_ == 7) {
+          return (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_;
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Avro schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchema,
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder,
+            com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder>
+        getAvroSchemaFieldBuilder() {
+      if (avroSchemaBuilder_ == null) {
+        if (!(schemaCase_ == 7)) {
+          schema_ = com.google.cloud.bigquery.storage.v1beta2.AvroSchema.getDefaultInstance();
+        }
+        avroSchemaBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.bigquery.storage.v1beta2.AvroSchema,
+                com.google.cloud.bigquery.storage.v1beta2.AvroSchema.Builder,
+                com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder>(
+                (com.google.cloud.bigquery.storage.v1beta2.AvroSchema) schema_,
+                getParentForChildren(),
+                isClean());
+        schema_ = null;
+      }
+      schemaCase_ = 7;
+      onChanged();
+      ;
+      return avroSchemaBuilder_;
+    }
+
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchema,
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder,
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder>
+        arrowSchemaBuilder_;
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     *
+     * @return Whether the arrowSchema field is set.
+     */
+    @java.lang.Override
+    public boolean hasArrowSchema() {
+      return schemaCase_ == 8;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     *
+     * @return The arrowSchema.
+     */
+    @java.lang.Override
+    public com.google.cloud.bigquery.storage.v1beta2.ArrowSchema getArrowSchema() {
+      if (arrowSchemaBuilder_ == null) {
+        if (schemaCase_ == 8) {
+          return (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_;
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+      } else {
+        if (schemaCase_ == 8) {
+          return arrowSchemaBuilder_.getMessage();
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder setArrowSchema(com.google.cloud.bigquery.storage.v1beta2.ArrowSchema value) {
+      if (arrowSchemaBuilder_ == null) {
+        if (value == null) {
+          throw new NullPointerException();
+        }
+        schema_ = value;
+        onChanged();
+      } else {
+        arrowSchemaBuilder_.setMessage(value);
+      }
+      schemaCase_ = 8;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder setArrowSchema(
+        com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder builderForValue) {
+      if (arrowSchemaBuilder_ == null) {
+        schema_ = builderForValue.build();
+        onChanged();
+      } else {
+        arrowSchemaBuilder_.setMessage(builderForValue.build());
+      }
+      schemaCase_ = 8;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder mergeArrowSchema(com.google.cloud.bigquery.storage.v1beta2.ArrowSchema value) {
+      if (arrowSchemaBuilder_ == null) {
+        if (schemaCase_ == 8
+            && schema_
+                != com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance()) {
+          schema_ =
+              com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.newBuilder(
+                      (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_)
+                  .mergeFrom(value)
+                  .buildPartial();
+        } else {
+          schema_ = value;
+        }
+        onChanged();
+      } else {
+        if (schemaCase_ == 8) {
+          arrowSchemaBuilder_.mergeFrom(value);
+        }
+        arrowSchemaBuilder_.setMessage(value);
+      }
+      schemaCase_ = 8;
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public Builder clearArrowSchema() {
+      if (arrowSchemaBuilder_ == null) {
+        if (schemaCase_ == 8) {
+          schemaCase_ = 0;
+          schema_ = null;
+          onChanged();
+        }
+      } else {
+        if (schemaCase_ == 8) {
+          schemaCase_ = 0;
+          schema_ = null;
+        }
+        arrowSchemaBuilder_.clear();
+      }
+      return this;
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    public com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder getArrowSchemaBuilder() {
+      return getArrowSchemaFieldBuilder().getBuilder();
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    @java.lang.Override
+    public com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder
+        getArrowSchemaOrBuilder() {
+      if ((schemaCase_ == 8) && (arrowSchemaBuilder_ != null)) {
+        return arrowSchemaBuilder_.getMessageOrBuilder();
+      } else {
+        if (schemaCase_ == 8) {
+          return (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_;
+        }
+        return com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+      }
+    }
+    /**
+     *
+     *
+     * <pre>
+     * Output only. Arrow schema.
+     * </pre>
+     *
+     * <code>
+     * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+     * </code>
+     */
+    private com.google.protobuf.SingleFieldBuilderV3<
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchema,
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder,
+            com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder>
+        getArrowSchemaFieldBuilder() {
+      if (arrowSchemaBuilder_ == null) {
+        if (!(schemaCase_ == 8)) {
+          schema_ = com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.getDefaultInstance();
+        }
+        arrowSchemaBuilder_ =
+            new com.google.protobuf.SingleFieldBuilderV3<
+                com.google.cloud.bigquery.storage.v1beta2.ArrowSchema,
+                com.google.cloud.bigquery.storage.v1beta2.ArrowSchema.Builder,
+                com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder>(
+                (com.google.cloud.bigquery.storage.v1beta2.ArrowSchema) schema_,
+                getParentForChildren(),
+                isClean());
+        schema_ = null;
+      }
+      schemaCase_ = 8;
+      onChanged();
+      ;
+      return arrowSchemaBuilder_;
+    }
+
     @java.lang.Override
     public final Builder setUnknownFields(final com.google.protobuf.UnknownFieldSet unknownFields) {
       return super.setUnknownFields(unknownFields);
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponseOrBuilder.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponseOrBuilder.java
index 6a451072e5..9dac211a11 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponseOrBuilder.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadRowsResponseOrBuilder.java
@@ -180,5 +180,89 @@ public interface ReadRowsResponseOrBuilder
    */
   com.google.cloud.bigquery.storage.v1beta2.ThrottleStateOrBuilder getThrottleStateOrBuilder();
 
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return Whether the avroSchema field is set.
+   */
+  boolean hasAvroSchema();
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return The avroSchema.
+   */
+  com.google.cloud.bigquery.storage.v1beta2.AvroSchema getAvroSchema();
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Avro schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.AvroSchema avro_schema = 7 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   */
+  com.google.cloud.bigquery.storage.v1beta2.AvroSchemaOrBuilder getAvroSchemaOrBuilder();
+
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return Whether the arrowSchema field is set.
+   */
+  boolean hasArrowSchema();
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   *
+   * @return The arrowSchema.
+   */
+  com.google.cloud.bigquery.storage.v1beta2.ArrowSchema getArrowSchema();
+  /**
+   *
+   *
+   * <pre>
+   * Output only. Arrow schema.
+   * </pre>
+   *
+   * <code>
+   * .google.cloud.bigquery.storage.v1beta2.ArrowSchema arrow_schema = 8 [(.google.api.field_behavior) = OUTPUT_ONLY];
+   * </code>
+   */
+  com.google.cloud.bigquery.storage.v1beta2.ArrowSchemaOrBuilder getArrowSchemaOrBuilder();
+
   public com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse.RowsCase getRowsCase();
+
+  public com.google.cloud.bigquery.storage.v1beta2.ReadRowsResponse.SchemaCase getSchemaCase();
 }
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadSession.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadSession.java
index e188ff9a50..1ca9b33ac2 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadSession.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/ReadSession.java
@@ -1085,6 +1085,7 @@ public interface TableReadOptionsOrBuilder
      *           "nullable_field is not NULL"
      *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
      *           "numeric_field BETWEEN 1.0 AND 5.0"
+     * Restricted to a maximum length for 1 MB.
      * </pre>
      *
      * <code>string row_restriction = 2;</code>
@@ -1103,6 +1104,7 @@ public interface TableReadOptionsOrBuilder
      *           "nullable_field is not NULL"
      *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
      *           "numeric_field BETWEEN 1.0 AND 5.0"
+     * Restricted to a maximum length for 1 MB.
      * </pre>
      *
      * <code>string row_restriction = 2;</code>
@@ -1367,6 +1369,7 @@ public com.google.protobuf.ByteString getSelectedFieldsBytes(int index) {
      *           "nullable_field is not NULL"
      *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
      *           "numeric_field BETWEEN 1.0 AND 5.0"
+     * Restricted to a maximum length for 1 MB.
      * </pre>
      *
      * <code>string row_restriction = 2;</code>
@@ -1396,6 +1399,7 @@ public java.lang.String getRowRestriction() {
      *           "nullable_field is not NULL"
      *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
      *           "numeric_field BETWEEN 1.0 AND 5.0"
+     * Restricted to a maximum length for 1 MB.
      * </pre>
      *
      * <code>string row_restriction = 2;</code>
@@ -2081,6 +2085,7 @@ public Builder addSelectedFieldsBytes(com.google.protobuf.ByteString value) {
        *           "nullable_field is not NULL"
        *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        *           "numeric_field BETWEEN 1.0 AND 5.0"
+       * Restricted to a maximum length for 1 MB.
        * </pre>
        *
        * <code>string row_restriction = 2;</code>
@@ -2109,6 +2114,7 @@ public java.lang.String getRowRestriction() {
        *           "nullable_field is not NULL"
        *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        *           "numeric_field BETWEEN 1.0 AND 5.0"
+       * Restricted to a maximum length for 1 MB.
        * </pre>
        *
        * <code>string row_restriction = 2;</code>
@@ -2137,6 +2143,7 @@ public com.google.protobuf.ByteString getRowRestrictionBytes() {
        *           "nullable_field is not NULL"
        *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        *           "numeric_field BETWEEN 1.0 AND 5.0"
+       * Restricted to a maximum length for 1 MB.
        * </pre>
        *
        * <code>string row_restriction = 2;</code>
@@ -2164,6 +2171,7 @@ public Builder setRowRestriction(java.lang.String value) {
        *           "nullable_field is not NULL"
        *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        *           "numeric_field BETWEEN 1.0 AND 5.0"
+       * Restricted to a maximum length for 1 MB.
        * </pre>
        *
        * <code>string row_restriction = 2;</code>
@@ -2187,6 +2195,7 @@ public Builder clearRowRestriction() {
        *           "nullable_field is not NULL"
        *           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
        *           "numeric_field BETWEEN 1.0 AND 5.0"
+       * Restricted to a maximum length for 1 MB.
        * </pre>
        *
        * <code>string row_restriction = 2;</code>
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageError.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageError.java
index 11e197c11f..9b99d67ed4 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageError.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageError.java
@@ -23,8 +23,9 @@
  *
  * <pre>
  * Structured custom BigQuery Storage error message. The error can be attached
- * as error details in the returned rpc Status. User can use the info to process
- * errors in a structural way, rather than having to parse error messages.
+ * as error details in the returned rpc Status. In particular, the use of error
+ * codes allows more structured error handling, and reduces the need to evaluate
+ * unstructured error text strings.
  * </pre>
  *
  * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.StorageError}
@@ -195,13 +196,23 @@ public enum StorageErrorCode implements com.google.protobuf.ProtocolMessageEnum
      *
      * <pre>
      * Invalid Stream state.
-     * For example, you try to commit a stream that is not fianlized or is
+     * For example, you try to commit a stream that is not finalized or is
      * garbaged.
      * </pre>
      *
      * <code>INVALID_STREAM_STATE = 5;</code>
      */
     INVALID_STREAM_STATE(5),
+    /**
+     *
+     *
+     * <pre>
+     * Stream is finalized.
+     * </pre>
+     *
+     * <code>STREAM_FINALIZED = 6;</code>
+     */
+    STREAM_FINALIZED(6),
     UNRECOGNIZED(-1),
     ;
 
@@ -261,13 +272,23 @@ public enum StorageErrorCode implements com.google.protobuf.ProtocolMessageEnum
      *
      * <pre>
      * Invalid Stream state.
-     * For example, you try to commit a stream that is not fianlized or is
+     * For example, you try to commit a stream that is not finalized or is
      * garbaged.
      * </pre>
      *
      * <code>INVALID_STREAM_STATE = 5;</code>
      */
     public static final int INVALID_STREAM_STATE_VALUE = 5;
+    /**
+     *
+     *
+     * <pre>
+     * Stream is finalized.
+     * </pre>
+     *
+     * <code>STREAM_FINALIZED = 6;</code>
+     */
+    public static final int STREAM_FINALIZED_VALUE = 6;
 
     public final int getNumber() {
       if (this == UNRECOGNIZED) {
@@ -305,6 +326,8 @@ public static StorageErrorCode forNumber(int value) {
           return INVALID_STREAM_TYPE;
         case 5:
           return INVALID_STREAM_STATE;
+        case 6:
+          return STREAM_FINALIZED;
         default:
           return null;
       }
@@ -687,8 +710,9 @@ protected Builder newBuilderForType(com.google.protobuf.GeneratedMessageV3.Build
    *
    * <pre>
    * Structured custom BigQuery Storage error message. The error can be attached
-   * as error details in the returned rpc Status. User can use the info to process
-   * errors in a structural way, rather than having to parse error messages.
+   * as error details in the returned rpc Status. In particular, the use of error
+   * codes allows more structured error handling, and reduces the need to evaluate
+   * unstructured error text strings.
    * </pre>
    *
    * Protobuf type {@code google.cloud.bigquery.storage.v1beta2.StorageError}
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageProto.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageProto.java
index 1ed9b034de..001235ba5a 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageProto.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/StorageProto.java
@@ -146,7 +146,7 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "tats\022M\n\010progress\030\002 \001(\0132;.google.cloud.bi"
           + "gquery.storage.v1beta2.StreamStats.Progr"
           + "ess\032>\n\010Progress\022\031\n\021at_response_start\030\001 \001"
-          + "(\001\022\027\n\017at_response_end\030\002 \001(\001\"\333\002\n\020ReadRows"
+          + "(\001\022\027\n\017at_response_end\030\002 \001(\001\"\205\004\n\020ReadRows"
           + "Response\022D\n\tavro_rows\030\003 \001(\0132/.google.clo"
           + "ud.bigquery.storage.v1beta2.AvroRowsH\000\022U"
           + "\n\022arrow_record_batch\030\004 \001(\01327.google.clou"
@@ -155,125 +155,130 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "2.google.cloud.bigquery.storage.v1beta2."
           + "StreamStats\022L\n\016throttle_state\030\005 \001(\01324.go"
           + "ogle.cloud.bigquery.storage.v1beta2.Thro"
-          + "ttleStateB\006\n\004rows\"k\n\026SplitReadStreamRequ"
-          + "est\022?\n\004name\030\001 \001(\tB1\340A\002\372A+\n)bigquerystora"
-          + "ge.googleapis.com/ReadStream\022\020\n\010fraction"
-          + "\030\002 \001(\001\"\261\001\n\027SplitReadStreamResponse\022I\n\016pr"
-          + "imary_stream\030\001 \001(\01321.google.cloud.bigque"
-          + "ry.storage.v1beta2.ReadStream\022K\n\020remaind"
-          + "er_stream\030\002 \001(\01321.google.cloud.bigquery."
-          + "storage.v1beta2.ReadStream\"\240\001\n\030CreateWri"
-          + "teStreamRequest\0225\n\006parent\030\001 \001(\tB%\340A\002\372A\037\n"
-          + "\035bigquery.googleapis.com/Table\022M\n\014write_"
-          + "stream\030\002 \001(\01322.google.cloud.bigquery.sto"
-          + "rage.v1beta2.WriteStreamB\003\340A\002\"\227\003\n\021Append"
-          + "RowsRequest\022H\n\014write_stream\030\001 \001(\tB2\340A\002\372A"
-          + ",\n*bigquerystorage.googleapis.com/WriteS"
-          + "tream\022+\n\006offset\030\002 \001(\0132\033.google.protobuf."
-          + "Int64Value\022X\n\nproto_rows\030\004 \001(\0132B.google."
-          + "cloud.bigquery.storage.v1beta2.AppendRow"
-          + "sRequest.ProtoDataH\000\022\020\n\010trace_id\030\006 \001(\t\032\226"
-          + "\001\n\tProtoData\022I\n\rwriter_schema\030\001 \001(\01322.go"
-          + "ogle.cloud.bigquery.storage.v1beta2.Prot"
-          + "oSchema\022>\n\004rows\030\002 \001(\01320.google.cloud.big"
-          + "query.storage.v1beta2.ProtoRowsB\006\n\004rows\""
-          + "\257\002\n\022AppendRowsResponse\022_\n\rappend_result\030"
-          + "\001 \001(\0132F.google.cloud.bigquery.storage.v1"
-          + "beta2.AppendRowsResponse.AppendResultH\000\022"
-          + "#\n\005error\030\002 \001(\0132\022.google.rpc.StatusH\000\022J\n\016"
-          + "updated_schema\030\003 \001(\01322.google.cloud.bigq"
-          + "uery.storage.v1beta2.TableSchema\032;\n\014Appe"
-          + "ndResult\022+\n\006offset\030\001 \001(\0132\033.google.protob"
-          + "uf.Int64ValueB\n\n\010response\"Y\n\025GetWriteStr"
-          + "eamRequest\022@\n\004name\030\001 \001(\tB2\340A\002\372A,\n*bigque"
-          + "rystorage.googleapis.com/WriteStream\"Q\n\036"
-          + "BatchCommitWriteStreamsRequest\022\023\n\006parent"
-          + "\030\001 \001(\tB\003\340A\002\022\032\n\rwrite_streams\030\002 \003(\tB\003\340A\002\""
-          + "\236\001\n\037BatchCommitWriteStreamsResponse\022/\n\013c"
-          + "ommit_time\030\001 \001(\0132\032.google.protobuf.Times"
-          + "tamp\022J\n\rstream_errors\030\002 \003(\01323.google.clo"
-          + "ud.bigquery.storage.v1beta2.StorageError"
-          + "\"^\n\032FinalizeWriteStreamRequest\022@\n\004name\030\001"
-          + " \001(\tB2\340A\002\372A,\n*bigquerystorage.googleapis"
-          + ".com/WriteStream\"0\n\033FinalizeWriteStreamR"
-          + "esponse\022\021\n\trow_count\030\001 \001(\003\"\211\001\n\020FlushRows"
-          + "Request\022H\n\014write_stream\030\001 \001(\tB2\340A\002\372A,\n*b"
-          + "igquerystorage.googleapis.com/WriteStrea"
-          + "m\022+\n\006offset\030\002 \001(\0132\033.google.protobuf.Int6"
-          + "4Value\"#\n\021FlushRowsResponse\022\016\n\006offset\030\001 "
-          + "\001(\003\"\276\002\n\014StorageError\022R\n\004code\030\001 \001(\0162D.goo"
-          + "gle.cloud.bigquery.storage.v1beta2.Stora"
-          + "geError.StorageErrorCode\022\016\n\006entity\030\002 \001(\t"
-          + "\022\025\n\rerror_message\030\003 \001(\t\"\262\001\n\020StorageError"
-          + "Code\022\"\n\036STORAGE_ERROR_CODE_UNSPECIFIED\020\000"
-          + "\022\023\n\017TABLE_NOT_FOUND\020\001\022\034\n\030STREAM_ALREADY_"
-          + "COMMITTED\020\002\022\024\n\020STREAM_NOT_FOUND\020\003\022\027\n\023INV"
-          + "ALID_STREAM_TYPE\020\004\022\030\n\024INVALID_STREAM_STA"
-          + "TE\020\0052\363\006\n\014BigQueryRead\022\370\001\n\021CreateReadSess"
-          + "ion\022?.google.cloud.bigquery.storage.v1be"
-          + "ta2.CreateReadSessionRequest\0322.google.cl"
-          + "oud.bigquery.storage.v1beta2.ReadSession"
-          + "\"n\202\323\344\223\002A\"</v1beta2/{read_session.table=p"
-          + "rojects/*/datasets/*/tables/*}:\001*\332A$pare"
-          + "nt,read_session,max_stream_count\022\336\001\n\010Rea"
-          + "dRows\0226.google.cloud.bigquery.storage.v1"
-          + "beta2.ReadRowsRequest\0327.google.cloud.big"
-          + "query.storage.v1beta2.ReadRowsResponse\"_"
-          + "\202\323\344\223\002D\022B/v1beta2/{read_stream=projects/*"
-          + "/locations/*/sessions/*/streams/*}\332A\022rea"
-          + "d_stream,offset0\001\022\325\001\n\017SplitReadStream\022=."
-          + "google.cloud.bigquery.storage.v1beta2.Sp"
-          + "litReadStreamRequest\032>.google.cloud.bigq"
-          + "uery.storage.v1beta2.SplitReadStreamResp"
-          + "onse\"C\202\323\344\223\002=\022;/v1beta2/{name=projects/*/"
-          + "locations/*/sessions/*/streams/*}\032\256\001\312A\036b"
-          + "igquerystorage.googleapis.com\322A\211\001https:/"
-          + "/www.googleapis.com/auth/bigquery,https:"
-          + "//www.googleapis.com/auth/bigquery.reado"
-          + "nly,https://www.googleapis.com/auth/clou"
-          + "d-platform2\226\014\n\rBigQueryWrite\022\346\001\n\021CreateW"
-          + "riteStream\022?.google.cloud.bigquery.stora"
-          + "ge.v1beta2.CreateWriteStreamRequest\0322.go"
-          + "ogle.cloud.bigquery.storage.v1beta2.Writ"
-          + "eStream\"\\\202\323\344\223\002@\"0/v1beta2/{parent=projec"
-          + "ts/*/datasets/*/tables/*}:\014write_stream\332"
-          + "A\023parent,write_stream\022\341\001\n\nAppendRows\0228.g"
-          + "oogle.cloud.bigquery.storage.v1beta2.App"
-          + "endRowsRequest\0329.google.cloud.bigquery.s"
-          + "torage.v1beta2.AppendRowsResponse\"Z\202\323\344\223\002"
-          + "E\"@/v1beta2/{write_stream=projects/*/dat"
-          + "asets/*/tables/*/streams/*}:\001*\332A\014write_s"
-          + "tream(\0010\001\022\316\001\n\016GetWriteStream\022<.google.cl"
-          + "oud.bigquery.storage.v1beta2.GetWriteStr"
-          + "eamRequest\0322.google.cloud.bigquery.stora"
-          + "ge.v1beta2.WriteStream\"J\202\323\344\223\002=\"8/v1beta2"
-          + "/{name=projects/*/datasets/*/tables/*/st"
-          + "reams/*}:\001*\332A\004name\022\350\001\n\023FinalizeWriteStre"
-          + "am\022A.google.cloud.bigquery.storage.v1bet"
-          + "a2.FinalizeWriteStreamRequest\032B.google.c"
-          + "loud.bigquery.storage.v1beta2.FinalizeWr"
-          + "iteStreamResponse\"J\202\323\344\223\002=\"8/v1beta2/{nam"
-          + "e=projects/*/datasets/*/tables/*/streams"
-          + "/*}:\001*\332A\004name\022\353\001\n\027BatchCommitWriteStream"
-          + "s\022E.google.cloud.bigquery.storage.v1beta"
-          + "2.BatchCommitWriteStreamsRequest\032F.googl"
-          + "e.cloud.bigquery.storage.v1beta2.BatchCo"
-          + "mmitWriteStreamsResponse\"A\202\323\344\223\0022\0220/v1bet"
-          + "a2/{parent=projects/*/datasets/*/tables/"
-          + "*}\332A\006parent\022\332\001\n\tFlushRows\0227.google.cloud"
-          + ".bigquery.storage.v1beta2.FlushRowsReque"
-          + "st\0328.google.cloud.bigquery.storage.v1bet"
-          + "a2.FlushRowsResponse\"Z\202\323\344\223\002E\"@/v1beta2/{"
-          + "write_stream=projects/*/datasets/*/table"
-          + "s/*/streams/*}:\001*\332A\014write_stream\032\260\001\312A\036bi"
-          + "gquerystorage.googleapis.com\322A\213\001https://"
-          + "www.googleapis.com/auth/bigquery,https:/"
-          + "/www.googleapis.com/auth/bigquery.insert"
-          + "data,https://www.googleapis.com/auth/clo"
-          + "ud-platformB\211\001\n)com.google.cloud.bigquer"
-          + "y.storage.v1beta2B\014StorageProtoP\001ZLgoogl"
-          + "e.golang.org/genproto/googleapis/cloud/b"
-          + "igquery/storage/v1beta2;storageb\006proto3"
+          + "ttleState\022M\n\013avro_schema\030\007 \001(\01321.google."
+          + "cloud.bigquery.storage.v1beta2.AvroSchem"
+          + "aB\003\340A\003H\001\022O\n\014arrow_schema\030\010 \001(\01322.google."
+          + "cloud.bigquery.storage.v1beta2.ArrowSche"
+          + "maB\003\340A\003H\001B\006\n\004rowsB\010\n\006schema\"k\n\026SplitRead"
+          + "StreamRequest\022?\n\004name\030\001 \001(\tB1\340A\002\372A+\n)big"
+          + "querystorage.googleapis.com/ReadStream\022\020"
+          + "\n\010fraction\030\002 \001(\001\"\261\001\n\027SplitReadStreamResp"
+          + "onse\022I\n\016primary_stream\030\001 \001(\01321.google.cl"
+          + "oud.bigquery.storage.v1beta2.ReadStream\022"
+          + "K\n\020remainder_stream\030\002 \001(\01321.google.cloud"
+          + ".bigquery.storage.v1beta2.ReadStream\"\240\001\n"
+          + "\030CreateWriteStreamRequest\0225\n\006parent\030\001 \001("
+          + "\tB%\340A\002\372A\037\n\035bigquery.googleapis.com/Table"
+          + "\022M\n\014write_stream\030\002 \001(\01322.google.cloud.bi"
+          + "gquery.storage.v1beta2.WriteStreamB\003\340A\002\""
+          + "\227\003\n\021AppendRowsRequest\022H\n\014write_stream\030\001 "
+          + "\001(\tB2\340A\002\372A,\n*bigquerystorage.googleapis."
+          + "com/WriteStream\022+\n\006offset\030\002 \001(\0132\033.google"
+          + ".protobuf.Int64Value\022X\n\nproto_rows\030\004 \001(\013"
+          + "2B.google.cloud.bigquery.storage.v1beta2"
+          + ".AppendRowsRequest.ProtoDataH\000\022\020\n\010trace_"
+          + "id\030\006 \001(\t\032\226\001\n\tProtoData\022I\n\rwriter_schema\030"
+          + "\001 \001(\01322.google.cloud.bigquery.storage.v1"
+          + "beta2.ProtoSchema\022>\n\004rows\030\002 \001(\01320.google"
+          + ".cloud.bigquery.storage.v1beta2.ProtoRow"
+          + "sB\006\n\004rows\"\257\002\n\022AppendRowsResponse\022_\n\rappe"
+          + "nd_result\030\001 \001(\0132F.google.cloud.bigquery."
+          + "storage.v1beta2.AppendRowsResponse.Appen"
+          + "dResultH\000\022#\n\005error\030\002 \001(\0132\022.google.rpc.St"
+          + "atusH\000\022J\n\016updated_schema\030\003 \001(\01322.google."
+          + "cloud.bigquery.storage.v1beta2.TableSche"
+          + "ma\032;\n\014AppendResult\022+\n\006offset\030\001 \001(\0132\033.goo"
+          + "gle.protobuf.Int64ValueB\n\n\010response\"Y\n\025G"
+          + "etWriteStreamRequest\022@\n\004name\030\001 \001(\tB2\340A\002\372"
+          + "A,\n*bigquerystorage.googleapis.com/Write"
+          + "Stream\"Q\n\036BatchCommitWriteStreamsRequest"
+          + "\022\023\n\006parent\030\001 \001(\tB\003\340A\002\022\032\n\rwrite_streams\030\002"
+          + " \003(\tB\003\340A\002\"\236\001\n\037BatchCommitWriteStreamsRes"
+          + "ponse\022/\n\013commit_time\030\001 \001(\0132\032.google.prot"
+          + "obuf.Timestamp\022J\n\rstream_errors\030\002 \003(\01323."
+          + "google.cloud.bigquery.storage.v1beta2.St"
+          + "orageError\"^\n\032FinalizeWriteStreamRequest"
+          + "\022@\n\004name\030\001 \001(\tB2\340A\002\372A,\n*bigquerystorage."
+          + "googleapis.com/WriteStream\"0\n\033FinalizeWr"
+          + "iteStreamResponse\022\021\n\trow_count\030\001 \001(\003\"\211\001\n"
+          + "\020FlushRowsRequest\022H\n\014write_stream\030\001 \001(\tB"
+          + "2\340A\002\372A,\n*bigquerystorage.googleapis.com/"
+          + "WriteStream\022+\n\006offset\030\002 \001(\0132\033.google.pro"
+          + "tobuf.Int64Value\"#\n\021FlushRowsResponse\022\016\n"
+          + "\006offset\030\001 \001(\003\"\324\002\n\014StorageError\022R\n\004code\030\001"
+          + " \001(\0162D.google.cloud.bigquery.storage.v1b"
+          + "eta2.StorageError.StorageErrorCode\022\016\n\006en"
+          + "tity\030\002 \001(\t\022\025\n\rerror_message\030\003 \001(\t\"\310\001\n\020St"
+          + "orageErrorCode\022\"\n\036STORAGE_ERROR_CODE_UNS"
+          + "PECIFIED\020\000\022\023\n\017TABLE_NOT_FOUND\020\001\022\034\n\030STREA"
+          + "M_ALREADY_COMMITTED\020\002\022\024\n\020STREAM_NOT_FOUN"
+          + "D\020\003\022\027\n\023INVALID_STREAM_TYPE\020\004\022\030\n\024INVALID_"
+          + "STREAM_STATE\020\005\022\024\n\020STREAM_FINALIZED\020\0062\363\006\n"
+          + "\014BigQueryRead\022\370\001\n\021CreateReadSession\022?.go"
+          + "ogle.cloud.bigquery.storage.v1beta2.Crea"
+          + "teReadSessionRequest\0322.google.cloud.bigq"
+          + "uery.storage.v1beta2.ReadSession\"n\202\323\344\223\002A"
+          + "\"</v1beta2/{read_session.table=projects/"
+          + "*/datasets/*/tables/*}:\001*\332A$parent,read_"
+          + "session,max_stream_count\022\336\001\n\010ReadRows\0226."
+          + "google.cloud.bigquery.storage.v1beta2.Re"
+          + "adRowsRequest\0327.google.cloud.bigquery.st"
+          + "orage.v1beta2.ReadRowsResponse\"_\202\323\344\223\002D\022B"
+          + "/v1beta2/{read_stream=projects/*/locatio"
+          + "ns/*/sessions/*/streams/*}\332A\022read_stream"
+          + ",offset0\001\022\325\001\n\017SplitReadStream\022=.google.c"
+          + "loud.bigquery.storage.v1beta2.SplitReadS"
+          + "treamRequest\032>.google.cloud.bigquery.sto"
+          + "rage.v1beta2.SplitReadStreamResponse\"C\202\323"
+          + "\344\223\002=\022;/v1beta2/{name=projects/*/location"
+          + "s/*/sessions/*/streams/*}\032\256\001\312A\036bigquerys"
+          + "torage.googleapis.com\322A\211\001https://www.goo"
+          + "gleapis.com/auth/bigquery,https://www.go"
+          + "ogleapis.com/auth/bigquery.readonly,http"
+          + "s://www.googleapis.com/auth/cloud-platfo"
+          + "rm2\226\014\n\rBigQueryWrite\022\346\001\n\021CreateWriteStre"
+          + "am\022?.google.cloud.bigquery.storage.v1bet"
+          + "a2.CreateWriteStreamRequest\0322.google.clo"
+          + "ud.bigquery.storage.v1beta2.WriteStream\""
+          + "\\\202\323\344\223\002@\"0/v1beta2/{parent=projects/*/dat"
+          + "asets/*/tables/*}:\014write_stream\332A\023parent"
+          + ",write_stream\022\341\001\n\nAppendRows\0228.google.cl"
+          + "oud.bigquery.storage.v1beta2.AppendRowsR"
+          + "equest\0329.google.cloud.bigquery.storage.v"
+          + "1beta2.AppendRowsResponse\"Z\202\323\344\223\002E\"@/v1be"
+          + "ta2/{write_stream=projects/*/datasets/*/"
+          + "tables/*/streams/*}:\001*\332A\014write_stream(\0010"
+          + "\001\022\316\001\n\016GetWriteStream\022<.google.cloud.bigq"
+          + "uery.storage.v1beta2.GetWriteStreamReque"
+          + "st\0322.google.cloud.bigquery.storage.v1bet"
+          + "a2.WriteStream\"J\202\323\344\223\002=\"8/v1beta2/{name=p"
+          + "rojects/*/datasets/*/tables/*/streams/*}"
+          + ":\001*\332A\004name\022\350\001\n\023FinalizeWriteStream\022A.goo"
+          + "gle.cloud.bigquery.storage.v1beta2.Final"
+          + "izeWriteStreamRequest\032B.google.cloud.big"
+          + "query.storage.v1beta2.FinalizeWriteStrea"
+          + "mResponse\"J\202\323\344\223\002=\"8/v1beta2/{name=projec"
+          + "ts/*/datasets/*/tables/*/streams/*}:\001*\332A"
+          + "\004name\022\353\001\n\027BatchCommitWriteStreams\022E.goog"
+          + "le.cloud.bigquery.storage.v1beta2.BatchC"
+          + "ommitWriteStreamsRequest\032F.google.cloud."
+          + "bigquery.storage.v1beta2.BatchCommitWrit"
+          + "eStreamsResponse\"A\202\323\344\223\0022\0220/v1beta2/{pare"
+          + "nt=projects/*/datasets/*/tables/*}\332A\006par"
+          + "ent\022\332\001\n\tFlushRows\0227.google.cloud.bigquer"
+          + "y.storage.v1beta2.FlushRowsRequest\0328.goo"
+          + "gle.cloud.bigquery.storage.v1beta2.Flush"
+          + "RowsResponse\"Z\202\323\344\223\002E\"@/v1beta2/{write_st"
+          + "ream=projects/*/datasets/*/tables/*/stre"
+          + "ams/*}:\001*\332A\014write_stream\032\260\001\312A\036bigqueryst"
+          + "orage.googleapis.com\322A\213\001https://www.goog"
+          + "leapis.com/auth/bigquery,https://www.goo"
+          + "gleapis.com/auth/bigquery.insertdata,htt"
+          + "ps://www.googleapis.com/auth/cloud-platf"
+          + "ormB\211\001\n)com.google.cloud.bigquery.storag"
+          + "e.v1beta2B\014StorageProtoP\001ZLgoogle.golang"
+          + ".org/genproto/googleapis/cloud/bigquery/"
+          + "storage/v1beta2;storageb\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
@@ -340,7 +345,15 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
         new com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
             internal_static_google_cloud_bigquery_storage_v1beta2_ReadRowsResponse_descriptor,
             new java.lang.String[] {
-              "AvroRows", "ArrowRecordBatch", "RowCount", "Stats", "ThrottleState", "Rows",
+              "AvroRows",
+              "ArrowRecordBatch",
+              "RowCount",
+              "Stats",
+              "ThrottleState",
+              "AvroSchema",
+              "ArrowSchema",
+              "Rows",
+              "Schema",
             });
     internal_static_google_cloud_bigquery_storage_v1beta2_SplitReadStreamRequest_descriptor =
         getDescriptor().getMessageTypes().get(5);
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableFieldSchema.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableFieldSchema.java
index d3d8bc15f1..369879d537 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableFieldSchema.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableFieldSchema.java
@@ -286,6 +286,26 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
      * <code>NUMERIC = 12;</code>
      */
     NUMERIC(12),
+    /**
+     *
+     *
+     * <pre>
+     * BigNumeric value
+     * </pre>
+     *
+     * <code>BIGNUMERIC = 13;</code>
+     */
+    BIGNUMERIC(13),
+    /**
+     *
+     *
+     * <pre>
+     * Interval
+     * </pre>
+     *
+     * <code>INTERVAL = 14;</code>
+     */
+    INTERVAL(14),
     UNRECOGNIZED(-1),
     ;
 
@@ -419,6 +439,26 @@ public enum Type implements com.google.protobuf.ProtocolMessageEnum {
      * <code>NUMERIC = 12;</code>
      */
     public static final int NUMERIC_VALUE = 12;
+    /**
+     *
+     *
+     * <pre>
+     * BigNumeric value
+     * </pre>
+     *
+     * <code>BIGNUMERIC = 13;</code>
+     */
+    public static final int BIGNUMERIC_VALUE = 13;
+    /**
+     *
+     *
+     * <pre>
+     * Interval
+     * </pre>
+     *
+     * <code>INTERVAL = 14;</code>
+     */
+    public static final int INTERVAL_VALUE = 14;
 
     public final int getNumber() {
       if (this == UNRECOGNIZED) {
@@ -470,6 +510,10 @@ public static Type forNumber(int value) {
           return GEOGRAPHY;
         case 12:
           return NUMERIC;
+        case 13:
+          return BIGNUMERIC;
+        case 14:
+          return INTERVAL;
         default:
           return null;
       }
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableProto.java b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableProto.java
index 9e02cb788b..faf88d105b 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableProto.java
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/java/com/google/cloud/bigquery/storage/v1beta2/TableProto.java
@@ -49,24 +49,25 @@ public static com.google.protobuf.Descriptors.FileDescriptor getDescriptor() {
           + "ge.v1beta2\032\037google/api/field_behavior.pr"
           + "oto\"V\n\013TableSchema\022G\n\006fields\030\001 \003(\01327.goo"
           + "gle.cloud.bigquery.storage.v1beta2.Table"
-          + "FieldSchema\"\247\004\n\020TableFieldSchema\022\021\n\004name"
+          + "FieldSchema\"\305\004\n\020TableFieldSchema\022\021\n\004name"
           + "\030\001 \001(\tB\003\340A\002\022O\n\004type\030\002 \001(\0162<.google.cloud"
           + ".bigquery.storage.v1beta2.TableFieldSche"
           + "ma.TypeB\003\340A\002\022O\n\004mode\030\003 \001(\0162<.google.clou"
           + "d.bigquery.storage.v1beta2.TableFieldSch"
           + "ema.ModeB\003\340A\001\022L\n\006fields\030\004 \003(\01327.google.c"
           + "loud.bigquery.storage.v1beta2.TableField"
-          + "SchemaB\003\340A\001\022\030\n\013description\030\006 \001(\tB\003\340A\001\"\255\001"
+          + "SchemaB\003\340A\001\022\030\n\013description\030\006 \001(\tB\003\340A\001\"\313\001"
           + "\n\004Type\022\024\n\020TYPE_UNSPECIFIED\020\000\022\n\n\006STRING\020\001"
           + "\022\t\n\005INT64\020\002\022\n\n\006DOUBLE\020\003\022\n\n\006STRUCT\020\004\022\t\n\005B"
           + "YTES\020\005\022\010\n\004BOOL\020\006\022\r\n\tTIMESTAMP\020\007\022\010\n\004DATE\020"
           + "\010\022\010\n\004TIME\020\t\022\014\n\010DATETIME\020\n\022\r\n\tGEOGRAPHY\020\013"
-          + "\022\013\n\007NUMERIC\020\014\"F\n\004Mode\022\024\n\020MODE_UNSPECIFIE"
-          + "D\020\000\022\014\n\010NULLABLE\020\001\022\014\n\010REQUIRED\020\002\022\014\n\010REPEA"
-          + "TED\020\003B\207\001\n)com.google.cloud.bigquery.stor"
-          + "age.v1beta2B\nTableProtoP\001ZLgoogle.golang"
-          + ".org/genproto/googleapis/cloud/bigquery/"
-          + "storage/v1beta2;storageb\006proto3"
+          + "\022\013\n\007NUMERIC\020\014\022\016\n\nBIGNUMERIC\020\r\022\014\n\010INTERVA"
+          + "L\020\016\"F\n\004Mode\022\024\n\020MODE_UNSPECIFIED\020\000\022\014\n\010NUL"
+          + "LABLE\020\001\022\014\n\010REQUIRED\020\002\022\014\n\010REPEATED\020\003B\207\001\n)"
+          + "com.google.cloud.bigquery.storage.v1beta"
+          + "2B\nTableProtoP\001ZLgoogle.golang.org/genpr"
+          + "oto/googleapis/cloud/bigquery/storage/v1"
+          + "beta2;storageb\006proto3"
     };
     descriptor =
         com.google.protobuf.Descriptors.FileDescriptor.internalBuildGeneratedFileFrom(
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/arrow.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/arrow.proto
index bc2e4eb126..74fe927b7e 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/arrow.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/arrow.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/avro.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/avro.proto
index 109ec86a2c..495132ec14 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/avro.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/avro.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/protobuf.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/protobuf.proto
index 741e7d114d..11e851be44 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/protobuf.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/protobuf.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -23,7 +23,7 @@ option java_multiple_files = true;
 option java_outer_classname = "ProtoBufProto";
 option java_package = "com.google.cloud.bigquery.storage.v1beta2";
 
-// Protobuf schema is an API presentation the proto buffer schema.
+// ProtoSchema describes the schema of the serialized protocol buffer data rows.
 message ProtoSchema {
   // Descriptor for input message. The descriptor has to be self contained,
   // including all the nested types, excepted for proto buffer well known types
@@ -31,7 +31,6 @@ message ProtoSchema {
   google.protobuf.DescriptorProto proto_descriptor = 1;
 }
 
-// Protobuf rows.
 message ProtoRows {
   // A sequence of rows serialized as a Protocol Buffer.
   //
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/storage.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/storage.proto
index 5538e29f28..8c25b84612 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/storage.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/storage.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -71,8 +71,7 @@ service BigQueryRead {
       post: "/v1beta2/{read_session.table=projects/*/datasets/*/tables/*}"
       body: "*"
     };
-    option (google.api.method_signature) =
-        "parent,read_session,max_stream_count";
+    option (google.api.method_signature) = "parent,read_session,max_stream_count";
   }
 
   // Reads rows from the stream in the format prescribed by the ReadSession.
@@ -101,8 +100,7 @@ service BigQueryRead {
   // original, primary, and residual, that original[0-j] = primary[0-j] and
   // original[j-n] = residual[0-m] once the streams have been read to
   // completion.
-  rpc SplitReadStream(SplitReadStreamRequest)
-      returns (SplitReadStreamResponse) {
+  rpc SplitReadStream(SplitReadStreamRequest) returns (SplitReadStreamResponse) {
     option (google.api.http) = {
       get: "/v1beta2/{name=projects/*/locations/*/sessions/*/streams/*}"
     };
@@ -171,8 +169,7 @@ service BigQueryWrite {
 
   // Finalize a write stream so that no new data can be appended to the
   // stream. Finalize is not supported on the '_default' stream.
-  rpc FinalizeWriteStream(FinalizeWriteStreamRequest)
-      returns (FinalizeWriteStreamResponse) {
+  rpc FinalizeWriteStream(FinalizeWriteStreamRequest) returns (FinalizeWriteStreamResponse) {
     option (google.api.http) = {
       post: "/v1beta2/{name=projects/*/datasets/*/tables/*/streams/*}"
       body: "*"
@@ -185,8 +182,7 @@ service BigQueryWrite {
   // Streams must be finalized before commit and cannot be committed multiple
   // times. Once a stream is committed, data in the stream becomes available
   // for read operations.
-  rpc BatchCommitWriteStreams(BatchCommitWriteStreamsRequest)
-      returns (BatchCommitWriteStreamsResponse) {
+  rpc BatchCommitWriteStreams(BatchCommitWriteStreamsRequest) returns (BatchCommitWriteStreamsResponse) {
     option (google.api.http) = {
       get: "/v1beta2/{parent=projects/*/datasets/*/tables/*}"
     };
@@ -303,6 +299,19 @@ message ReadRowsResponse {
   // Throttling state. If unset, the latest response still describes
   // the current throttling status.
   ThrottleState throttle_state = 5;
+
+  // The schema for the read. If read_options.selected_fields is set, the
+  // schema may be different from the table schema as it will only contain
+  // the selected fields. This schema is equivelant to the one returned by
+  // CreateSession. This field is only populated in the first ReadRowsResponse
+  // RPC.
+  oneof schema {
+    // Output only. Avro schema.
+    AvroSchema avro_schema = 7 [(google.api.field_behavior) = OUTPUT_ONLY];
+
+    // Output only. Arrow schema.
+    ArrowSchema arrow_schema = 8 [(google.api.field_behavior) = OUTPUT_ONLY];
+  }
 }
 
 // Request message for `SplitReadStream`.
@@ -342,7 +351,9 @@ message CreateWriteStreamRequest {
   // of `projects/{project}/datasets/{dataset}/tables/{table}`.
   string parent = 1 [
     (google.api.field_behavior) = REQUIRED,
-    (google.api.resource_reference) = { type: "bigquery.googleapis.com/Table" }
+    (google.api.resource_reference) = {
+      type: "bigquery.googleapis.com/Table"
+    }
   ];
 
   // Required. Stream to be created.
@@ -360,9 +371,9 @@ message AppendRowsRequest {
     ProtoRows rows = 2;
   }
 
-  // Required. The stream that is the target of the append operation. This value
-  // must be specified for the initial request. If subsequent requests specify
-  // the stream name, it must equal to the value provided in the first request.
+  // Required. The stream that is the target of the append operation. This value must be
+  // specified for the initial request. If subsequent requests specify the
+  // stream name, it must equal to the value provided in the first request.
   // To write to the _default stream, populate this field with a string in the
   // format `projects/{project}/datasets/{dataset}/tables/{table}/_default`.
   string write_stream = 1 [
@@ -394,7 +405,7 @@ message AppendRowsRequest {
 
 // Response message for `AppendRows`.
 message AppendRowsResponse {
-  // A success append result.
+  // AppendResult is returned for successful append requests.
   message AppendResult {
     // The row offset at which the last append occurred. The offset will not be
     // set if appending using default streams.
@@ -405,25 +416,32 @@ message AppendRowsResponse {
     // Result if the append is successful.
     AppendResult append_result = 1;
 
-    // Error in case of request failed. If set, it means rows are not accepted
-    // into the system. Users can retry or continue with other requests within
-    // the same connection.
-    // ALREADY_EXISTS: happens when offset is specified, it means the entire
-    //   request is already appended, it is safe to ignore this error.
-    // OUT_OF_RANGE: happens when offset is specified, it means the specified
-    //   offset is beyond the end of the stream.
-    // INVALID_ARGUMENT: error caused by malformed request or data.
-    // RESOURCE_EXHAUSTED: request rejected due to throttling. Only happens when
-    //   append without offset.
-    // ABORTED: request processing is aborted because of prior failures, request
-    //   can be retried if previous failure is fixed.
-    // INTERNAL: server side errors that can be retried.
+    // Error returned when problems were encountered.  If present,
+    // it indicates rows were not accepted into the system.
+    // Users can retry or continue with other append requests within the
+    // same connection.
+    //
+    // Additional information about error signalling:
+    //
+    // ALREADY_EXISTS: Happens when an append specified an offset, and the
+    // backend already has received data at this offset.  Typically encountered
+    // in retry scenarios, and can be ignored.
+    //
+    // OUT_OF_RANGE: Returned when the specified offset in the stream is beyond
+    // the current end of the stream.
+    //
+    // INVALID_ARGUMENT: Indicates a malformed request or data.
+    //
+    // ABORTED: Request processing is aborted because of prior failures.  The
+    // request can be retried if previous failure is addressed.
+    //
+    // INTERNAL: Indicates server side error(s) that can be retried.
     google.rpc.Status error = 2;
   }
 
   // If backend detects a schema update, pass it to user so that user can
-  // use it to input new type of message. It will be empty when there is no
-  // schema updates.
+  // use it to input new type of message. It will be empty when no schema
+  // updates have occurred.
   TableSchema updated_schema = 3;
 }
 
@@ -441,9 +459,11 @@ message GetWriteStreamRequest {
 
 // Request message for `BatchCommitWriteStreams`.
 message BatchCommitWriteStreamsRequest {
-  // Required. Parent table that all the streams should belong to, in the form
-  // of `projects/{project}/datasets/{dataset}/tables/{table}`.
-  string parent = 1 [(google.api.field_behavior) = REQUIRED];
+  // Required. Parent table that all the streams should belong to, in the form of
+  // `projects/{project}/datasets/{dataset}/tables/{table}`.
+  string parent = 1 [
+    (google.api.field_behavior) = REQUIRED
+  ];
 
   // Required. The group of streams that will be committed atomically.
   repeated string write_streams = 2 [(google.api.field_behavior) = REQUIRED];
@@ -452,11 +472,15 @@ message BatchCommitWriteStreamsRequest {
 // Response message for `BatchCommitWriteStreams`.
 message BatchCommitWriteStreamsResponse {
   // The time at which streams were committed in microseconds granularity.
-  // This field will only exist when there is no stream errors.
+  // This field will only exist when there are no stream errors.
+  // **Note** if this field is not set, it means the commit was not successful.
   google.protobuf.Timestamp commit_time = 1;
 
   // Stream level error if commit failed. Only streams with error will be in
   // the list.
+  // If empty, there is no error and all streams are committed successfully.
+  // If non empty, certain streams have errors and ZERO stream is committed due
+  // to atomicity guarantee.
   repeated StorageError stream_errors = 2;
 }
 
@@ -500,8 +524,9 @@ message FlushRowsResponse {
 }
 
 // Structured custom BigQuery Storage error message. The error can be attached
-// as error details in the returned rpc Status. User can use the info to process
-// errors in a structural way, rather than having to parse error messages.
+// as error details in the returned rpc Status. In particular, the use of error
+// codes allows more structured error handling, and reduces the need to evaluate
+// unstructured error text strings.
 message StorageError {
   // Error code for `StorageError`.
   enum StorageErrorCode {
@@ -522,9 +547,12 @@ message StorageError {
     INVALID_STREAM_TYPE = 4;
 
     // Invalid Stream state.
-    // For example, you try to commit a stream that is not fianlized or is
+    // For example, you try to commit a stream that is not finalized or is
     // garbaged.
     INVALID_STREAM_STATE = 5;
+
+    // Stream is finalized.
+    STREAM_FINALIZED = 6;
   }
 
   // BigQuery Storage specific error code.
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/stream.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/stream.proto
index 2b0a58c95a..d166e98754 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/stream.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/stream.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -74,6 +74,8 @@ message ReadSession {
     //           "nullable_field is not NULL"
     //           "st_equals(geo_field, st_geofromtext("POINT(2, 2)"))"
     //           "numeric_field BETWEEN 1.0 AND 5.0"
+    //
+    // Restricted to a maximum length for 1 MB.
     string row_restriction = 2;
 
     // Optional. Options specific to the Apache Arrow output format.
diff --git a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/table.proto b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/table.proto
index fd8a0a75a5..670a4a64a8 100644
--- a/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/table.proto
+++ b/proto-google-cloud-bigquerystorage-v1beta2/src/main/proto/google/cloud/bigquery/storage/v1beta2/table.proto
@@ -1,4 +1,4 @@
-// Copyright 2020 Google LLC
+// Copyright 2021 Google LLC
 //
 // Licensed under the Apache License, Version 2.0 (the "License");
 // you may not use this file except in compliance with the License.
@@ -70,6 +70,12 @@ message TableFieldSchema {
 
     // Numeric value
     NUMERIC = 12;
+
+    // BigNumeric value
+    BIGNUMERIC = 13;
+
+    // Interval
+    INTERVAL = 14;
   }
 
   enum Mode {
diff --git a/synth.metadata b/synth.metadata
index c13a54721d..6c1a2e2c95 100644
--- a/synth.metadata
+++ b/synth.metadata
@@ -11,39 +11,39 @@
       "git": {
         "name": ".",
         "remote": "https://github.com/googleapis/java-bigquerystorage.git",
-        "sha": "9bc1a4b36fa53d2ba8beea0ce38dec788631d458"
+        "sha": "c7da34252ee8c243be3ce737d03e1e12f10a5eba"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "c539b9b08b3366ee00c0ec1950f4df711552a269",
-        "internalRef": "365759522"
+        "sha": "1a7d7641a161bec4d5ab13b7ff5590ed8ba26d96",
+        "internalRef": "366823379"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "c539b9b08b3366ee00c0ec1950f4df711552a269",
-        "internalRef": "365759522"
+        "sha": "1a7d7641a161bec4d5ab13b7ff5590ed8ba26d96",
+        "internalRef": "366823379"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "c539b9b08b3366ee00c0ec1950f4df711552a269",
-        "internalRef": "365759522"
+        "sha": "1a7d7641a161bec4d5ab13b7ff5590ed8ba26d96",
+        "internalRef": "366823379"
       }
     },
     {
       "git": {
         "name": "googleapis",
         "remote": "https://github.com/googleapis/googleapis.git",
-        "sha": "c539b9b08b3366ee00c0ec1950f4df711552a269",
-        "internalRef": "365759522"
+        "sha": "1a7d7641a161bec4d5ab13b7ff5590ed8ba26d96",
+        "internalRef": "366823379"
       }
     },
     {