From 0da5fd16747445819212741dd55c224b867f1629 Mon Sep 17 00:00:00 2001
From: Praful Makani <praful@qlogic.io>
Date: Tue, 28 Jul 2020 21:53:19 +0530
Subject: [PATCH] docs(samples): add query total rows (#609)

---
 .../com/example/bigquery/QueryTotalRows.java  | 51 ++++++++++++++++++
 .../example/bigquery/QueryTotalRowsIT.java    | 53 +++++++++++++++++++
 2 files changed, 104 insertions(+)
 create mode 100644 samples/snippets/src/main/java/com/example/bigquery/QueryTotalRows.java
 create mode 100644 samples/snippets/src/test/java/com/example/bigquery/QueryTotalRowsIT.java

diff --git a/samples/snippets/src/main/java/com/example/bigquery/QueryTotalRows.java b/samples/snippets/src/main/java/com/example/bigquery/QueryTotalRows.java
new file mode 100644
index 000000000..6c1fe5e2e
--- /dev/null
+++ b/samples/snippets/src/main/java/com/example/bigquery/QueryTotalRows.java
@@ -0,0 +1,51 @@
+/*
+ * Copyright 2020 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.example.bigquery;
+
+// [START bigquery_query_total_rows]
+import com.google.cloud.bigquery.BigQuery;
+import com.google.cloud.bigquery.BigQueryException;
+import com.google.cloud.bigquery.BigQueryOptions;
+import com.google.cloud.bigquery.QueryJobConfiguration;
+import com.google.cloud.bigquery.TableResult;
+
+// Sample to run query total rows
+public class QueryTotalRows {
+
+  public static void runQueryTotalRows() {
+    String query =
+        "SELECT name FROM `bigquery-public-data.usa_names.usa_1910_2013`"
+            + " WHERE state = \"TX\""
+            + " LIMIT 100";
+    queryTotalRows(query);
+  }
+
+  public static void queryTotalRows(String query) {
+    try {
+      // Initialize client that will be used to send requests. This client only needs to be created
+      // once, and can be reused for multiple requests.
+      BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
+
+      TableResult results = bigquery.query(QueryJobConfiguration.of(query));
+
+      System.out.println("Query total rows performed successfully." + results.getTotalRows());
+    } catch (BigQueryException | InterruptedException e) {
+      System.out.println("Query not performed \n" + e.toString());
+    }
+  }
+}
+// [END bigquery_query_total_rows]
diff --git a/samples/snippets/src/test/java/com/example/bigquery/QueryTotalRowsIT.java b/samples/snippets/src/test/java/com/example/bigquery/QueryTotalRowsIT.java
new file mode 100644
index 000000000..8353e09da
--- /dev/null
+++ b/samples/snippets/src/test/java/com/example/bigquery/QueryTotalRowsIT.java
@@ -0,0 +1,53 @@
+/*
+ * Copyright 2020 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.example.bigquery;
+
+import static com.google.common.truth.Truth.assertThat;
+
+import java.io.ByteArrayOutputStream;
+import java.io.PrintStream;
+import org.junit.After;
+import org.junit.Before;
+import org.junit.Test;
+
+public class QueryTotalRowsIT {
+
+  private ByteArrayOutputStream bout;
+  private PrintStream out;
+
+  @Before
+  public void setUp() {
+    bout = new ByteArrayOutputStream();
+    out = new PrintStream(bout);
+    System.setOut(out);
+  }
+
+  @After
+  public void tearDown() {
+    System.setOut(null);
+  }
+
+  @Test
+  public void testQueryTotalRows() {
+    String query =
+        "SELECT name FROM `bigquery-public-data.usa_names.usa_1910_2013`"
+            + " WHERE state = \"TX\""
+            + " LIMIT 100";
+    QueryTotalRows.queryTotalRows(query);
+    assertThat(bout.toString()).contains("Query total rows performed successfully.");
+  }
+}