E570 docs: add simple query connection read api sample (#3394) · googleapis/java-bigquery@d407baa · GitHub
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docs: add simple query connection read api sample (#3394)
* Basic setup for connection api sample using simple query * Update sample to use Connection * Fix import/lint * Fix import order * Remove closing result set as it is not implemented * Remove necessary TODO comment * 🦉 Updates from OwlBot post-processor See https://github.com/googleapis/repo-automation-bots/blob/main/packages/owl-bot/README.md --------- Co-authored-by: Owl Bot <gcf-owl-bot[bot]@users.noreply.github.com>
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‎README.md‎

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@@ -233,6 +233,7 @@ Samples are in the [`samples/`](https://github.com/googleapis/java-bigquery/tree
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| Set User Agent | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/SetUserAgent.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/SetUserAgent.java) |
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| Simple App | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/SimpleApp.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/SimpleApp.java) |
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| Simple Query | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/SimpleQuery.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/SimpleQuery.java) |
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| Simple Query Connection Read Api | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/SimpleQueryConnectionReadApi.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/SimpleQueryConnectionReadApi.java) |
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| Table Exists | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/TableExists.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/TableExists.java) |
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| Table Insert Rows | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/TableInsertRows.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/TableInsertRows.java) |< 10BC0 /div>
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| Table Insert Rows Without Row Ids | [source code](https://github.com/googleapis/java-bigquery/blob/main/samples/snippets/src/main/java/com/example/bigquery/TableInsertRowsWithoutRowIds.java) | [![Open in Cloud Shell][shell_img]](https://console.cloud.google.com/cloudshell/open?git_repo=https://github.com/googleapis/java-bigquery&page=editor&open_in_editor=samples/snippets/src/main/java/com/example/bigquery/TableInsertRowsWithoutRowIds.java) |

‎samples/snippets/src/main/java/com/example/bigquery/SimpleQueryConnectionReadApi.java‎

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/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.bigquery;
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// [START bigquery_simple_query_connection_read_api]
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import com.google.cloud.bigquery.BigQuery;
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import com.google.cloud.bigquery.BigQueryOptions;
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import com.google.cloud.bigquery.BigQueryResult;
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import com.google.cloud.bigquery.Connection;
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import com.google.cloud.bigquery.ConnectionSettings;
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import java.sql.ResultSet;
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import java.sql.SQLException;
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public class SimpleQueryConnectionReadApi {
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public static void main(String[] args) {
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String query =
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"SELECT corpus, count(*) as corpus_count "
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+ "FROM `bigquery-public-data.samples.shakespeare` GROUP BY corpus;";
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simpleQueryConnectionReadApi(query);
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}
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public static void simpleQueryConnectionReadApi(String query) {
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try {
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// Initialize client and create a Connection session.
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BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService();
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ConnectionSettings connectionSettings =
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ConnectionSettings.newBuilder()
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.setRequestTimeout(10L)
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.setMaxResults(100L)
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.setUseQueryCache(true)
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.build();
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Connection connection = bigquery.createConnection(connectionSettings);
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// Execute the query using the Connection session.
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BigQueryResult bigQueryResult = connection.executeSelect(query);
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ResultSet resultSet = bigQueryResult.getResultSet();
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while (resultSet.next()) {
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System.out.print("corpus:" + resultSet.getString("corpus"));
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System.out.print(", count:" + resultSet.getLong("corpus_count"));
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System.out.println();
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}
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System.out.println("Query ran successfully");
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} catch (SQLException e) {
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System.out.println("Query did not run \n" + e.toString());
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}
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}
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}
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// [END bigquery_simple_query_connection_read_api]

‎samples/snippets/src/test/java/com/example/bigquery/SimpleQueryConnectionReadApiIT.java‎

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/*
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* Copyright 2024 Google LLC
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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package com.example.bigquery;
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import static com.google.common.truth.Truth.assertThat;
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import java.io.ByteArrayOutputStream;
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import java.io.PrintStream;
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import java.util.logging.Level;
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import java.util.logging.Logger;
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import org.junit.After;
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import org.junit.Before;
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import org.junit.Test;
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public class SimpleQueryConnectionReadApiIT {
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private final Logger log = Logger.getLogger(this.getClass().getName());
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private ByteArrayOutputStream bout;
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private PrintStream out;
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private PrintStream originalPrintStream;
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@Before
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public void setUp() {
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bout = new ByteArrayOutputStream();
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out = new PrintStream(bout);
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originalPrintStream = System.out;
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System.setOut(out);
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}
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@After
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public void tearDown() {
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// restores print statements in the original method
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System.out.flush();
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System.setOut(originalPrintStream);
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log.log(Level.INFO, "\n" + bout.toString());
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}
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@Test
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public void testSimpleQueryConnectionReadApi() {
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String query =
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"SELECT corpus, count(*) as corpus_count "
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+ "FROM `bigquery-public-data.samples.shakespeare` GROUP BY corpus;";
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SimpleQueryConnectionReadApi.simpleQueryConnectionReadApi(query);
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assertThat(bout.toString()).contains("Query ran successfully");
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}
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}

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