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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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samples/snippets/src/main/java/com/example/bigquery/SimpleQueryConnectionReadApi.java
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|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| /* | ||
| * Copyright 2024 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.example.bigquery; | ||
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| // [START bigquery_simple_query_connection_read_api] | ||
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| import com.google.cloud.bigquery.BigQuery; | ||
| import com.google.cloud.bigquery.BigQueryOptions; | ||
| import com.google.cloud.bigquery.BigQueryResult; | ||
| import com.google.cloud.bigquery.Connection; | ||
| import com.google.cloud.bigquery.ConnectionSettings; | ||
| import java.sql.ResultSet; | ||
| import java.sql.SQLException; | ||
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| public class SimpleQueryConnectionReadApi { | ||
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| public static void main(String[] args) { | ||
| String query = | ||
| "SELECT corpus, count(*) as corpus_count " | ||
| + "FROM `bigquery-public-data.samples.shakespeare` GROUP BY corpus;"; | ||
| simpleQueryConnectionReadApi(query); | ||
| } | ||
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| public static void simpleQueryConnectionReadApi(String query) { | ||
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| try { | ||
| // Initialize client and create a Connection session. | ||
| BigQuery bigquery = BigQueryOptions.getDefaultInstance().getService(); | ||
| ConnectionSettings connectionSettings = | ||
| ConnectionSettings.newBuilder() | ||
| .setRequestTimeout(10L) | ||
| .setMaxResults(100L) | ||
| .setUseQueryCache(true) | ||
| .build(); | ||
| Connection connection = bigquery.createConnection(connectionSettings); | ||
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| // Execute the query using the Connection session. | ||
| BigQueryResult bigQueryResult = connection.executeSelect(query); | ||
| ResultSet resultSet = bigQueryResult.getResultSet(); | ||
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| while (resultSet.next()) { | ||
| System.out.print("corpus:" + resultSet.getString("corpus")); | ||
| System.out.print(", count:" + resultSet.getLong("corpus_count")); | ||
| System.out.println(); | ||
| } | ||
| System.out.println("Query ran successfully"); | ||
| } catch (SQLException e) { | ||
| System.out.println("Query did not run \n" + e.toString()); | ||
| } | ||
| } | ||
| } | ||
| // [END bigquery_simple_query_connection_read_api] |
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samples/snippets/src/test/java/com/example/bigquery/SimpleQueryConnectionReadApiIT.java
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| /* | ||
| * Copyright 2024 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.example.bigquery; | ||
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| import static com.google.common.truth.Truth.assertThat; | ||
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| import java.io.ByteArrayOutputStream; | ||
| import java.io.PrintStream; | ||
| import java.util.logging.Level; | ||
| import java.util.logging.Logger; | ||
| import org.junit.After; | ||
| import org.junit.Before; | ||
| import org.junit.Test; | ||
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| public class SimpleQueryConnectionReadApiIT { | ||
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| private final Logger log = Logger.getLogger(this.getClass().getName()); | ||
| private ByteArrayOutputStream bout; | ||
| private PrintStream out; | ||
| private PrintStream originalPrintStream; | ||
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| @Before | ||
| public void setUp() { | ||
| bout = new ByteArrayOutputStream(); | ||
| out = new PrintStream(bout); | ||
| originalPrintStream = System.out; | ||
| System.setOut(out); | ||
| } | ||
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| @After | ||
| public void tearDown() { | ||
| // restores print statements in the original method | ||
| System.out.flush(); | ||
| System.setOut(originalPrintStream); | ||
| log.log(Level.INFO, "\n" + bout.toString()); | ||
| } | ||
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| @Test | ||
| public void testSimpleQueryConnectionReadApi() { | ||
| String query = | ||
| "SELECT corpus, count(*) as corpus_count " | ||
| + "FROM `bigquery-public-data.samples.shakespeare` GROUP BY corpus;"; | ||
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| SimpleQueryConnectionReadApi.simpleQueryConnectionReadApi(query); | ||
| assertThat(bout.toString()).contains("Query ran successfully"); | ||
| } | ||
| } |