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feat: add support for user defined TVFs (#1278)
Allow BigQuery client library users to define table-valued functions (TVFs) that return table data.
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70 changes: 70 additions & 0 deletions
70
google-cloud-bigquery/src/main/java/com/google/cloud/bigquery/StandardSQLTableType.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,70 @@ | ||
| /* | ||
| * 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. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
| package com.google.cloud.bigquery; | ||
|
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| import com.google.api.services.bigquery.model.StandardSqlTableType; | ||
| import com.google.auto.value.AutoValue; | ||
| import com.google.common.collect.Lists; | ||
| import java.io.Serializable; | ||
| import java.util.List; | ||
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| /** Represents Standard SQL table type information. */ | ||
| @AutoValue | ||
| public abstract class StandardSQLTableType implements Serializable { | ||
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| @AutoValue.Builder | ||
| public abstract static class Builder { | ||
|
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| /** Sets the columns in this table type. */ | ||
| public abstract Builder setColumns(List<StandardSQLField> columns); | ||
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| /** Creates a {@code StandardSQLTableType} object. */ | ||
| public abstract StandardSQLTableType build(); | ||
| } | ||
|
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| /** Returns the columns in this table type. */ | ||
| public abstract List<StandardSQLField> getColumns(); | ||
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| public abstract Builder toBuilder(); | ||
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| /** Returns a builder for a {@code StandardSQLTableType} object. */ | ||
| public static Builder newBuilder() { | ||
| return new AutoValue_StandardSQLTableType.Builder(); | ||
| } | ||
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| /** Returns a builder for a {@code StandardSQLTableType} object with the specified columns. */ | ||
| public static StandardSQLTableType.Builder newBuilder(List<StandardSQLField> columns) { | ||
| return newBuilder().setColumns(columns); | ||
| } | ||
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| static StandardSQLTableType fromPb( | ||
| com.google.api.services.bigquery.model.StandardSqlTableType tableTypePb) { | ||
| StandardSQLTableType.Builder builder = newBuilder(); | ||
| if (tableTypePb.getColumns() != null) { | ||
| builder.setColumns( | ||
| Lists.transform(tableTypePb.getColumns(), StandardSQLField.FROM_PB_FUNCTION)); | ||
| } | ||
| return builder.build(); | ||
| } | ||
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| StandardSqlTableType toPb() { | ||
| StandardSqlTableType tableType = new StandardSqlTableType(); | ||
| if (getColumns() != null) { | ||
| tableType.setColumns(Lists.transform(getColumns(), StandardSQLField.TO_PB_FUNCTION)); | ||
| } | ||
| return tableType; | ||
| } | ||
| } |
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60
google-cloud-bigquery/src/test/java/com/google/cloud/bigquery/StandardSQLTableTypeTest.java
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,60 @@ | ||
| /* | ||
| * 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. | ||
| * You may obtain a copy of the License at | ||
| * | ||
| * http://www.apache.org/licenses/LICENSE-2.0 | ||
| * | ||
| * Unless required by applicable law or agreed to in writing, software | ||
| * distributed under the License is distributed on an "AS IS" BASIS, | ||
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. | ||
| * See the License for the specific language governing permissions and | ||
| * limitations under the License. | ||
| */ | ||
|
|
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| package com.google.cloud.bigquery; | ||
|
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| import static org.junit.Assert.*; | ||
|
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| import com.google.common.collect.ImmutableList; | ||
| import java.util.List; | ||
| import org.junit.Test; | ||
|
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| public class StandardSQLTableTypeTest { | ||
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| private static final StandardSQLField COLUMN_1 = | ||
| StandardSQLField.newBuilder("COLUMN_1", StandardSQLDataType.newBuilder("STRING").build()) | ||
| .build(); | ||
| private static final StandardSQLField COLUMN_2 = | ||
| StandardSQLField.newBuilder("COLUMN_2", StandardSQLDataType.newBuilder("FLOAT64").build()) | ||
| .build(); | ||
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| private static final List<StandardSQLField> COLUMN_LIST = ImmutableList.of(COLUMN_1, COLUMN_2); | ||
| private static final StandardSQLTableType TABLE_TYPE = | ||
| StandardSQLTableType.newBuilder(COLUMN_LIST).build(); | ||
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| @Test | ||
| public void testToBuilder() { | ||
| compareStandardSQLTableType(TABLE_TYPE, TABLE_TYPE.toBuilder().build()); | ||
| } | ||
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| @Test | ||
| public void testBuilder() { | ||
| assertEquals(COLUMN_1, TABLE_TYPE.getColumns().get(0)); | ||
| assertEquals(COLUMN_2, TABLE_TYPE.getColumns().get(1)); | ||
| } | ||
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| @Test | ||
| public void testToAndFromPb() { | ||
| compareStandardSQLTableType(TABLE_TYPE, StandardSQLTableType.fromPb(TABLE_TYPE.toPb())); | ||
| } | ||
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| private void compareStandardSQLTableType( | ||
| StandardSQLTableType expected, StandardSQLTableType value) { | ||
| assertEquals(expected, value); | ||
| assertEquals(expected.getColumns(), value.getColumns()); | ||
| assertEquals(expected.hashCode(), value.hashCode()); | ||
| } | ||
| } |
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