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feat: sample - run a legacy SQL query (#97)
* feat: sample - run a legacy SQL query * nit: update * nit: update * update base on comments * update base on comments
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samples/src/main/java/com/example/bigquery/RunLegacyQuery.java
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/* | ||
* 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. | ||
*/ | ||
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package com.example.bigquery; | ||
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// [START bigquery_query_legacy] | ||
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; | ||
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public class RunLegacyQuery { | ||
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public static void runLegacyQuery() { | ||
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(); | ||
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// To use legacy SQL syntax, set useLegacySql to true. | ||
String query = | ||
"SELECT corpus FROM [bigquery-public-data:samples.shakespeare] GROUP BY corpus;"; | ||
QueryJobConfiguration queryConfig = | ||
QueryJobConfiguration.newBuilder(query).setUseLegacySql(true).build(); | ||
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// Execute the query. | ||
TableResult result = bigquery.query(queryConfig); | ||
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// Print the results. | ||
result.iterateAll().forEach(rows -> rows.forEach(row -> System.out.println(row.getValue()))); | ||
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System.out.println("Legacy query ran successfully"); | ||
} catch (BigQueryException | InterruptedException e) { | ||
System.out.println("Legacy query did not run \n" + e.toString()); | ||
} | ||
} | ||
} | ||
// [END bigquery_query_legacy] |
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samples/src/test/java/com/example/bigquery/RunLegacyQueryIT.java
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/* | ||
* 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. | ||
*/ | ||
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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 org.junit.After; | ||
import org.junit.Before; | ||
import org.junit.Test; | ||
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public class RunLegacyQueryIT { | ||
private ByteArrayOutputStream bout; | ||
private PrintStream out; | ||
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@Before | ||
public void setUp() { | ||
bout = new ByteArrayOutputStream(); | ||
out = new PrintStream(bout); | ||
System.setOut(out); | ||
} | ||
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@After | ||
public void tearDown() { | ||
System.setOut(null); | ||
} | ||
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@Test | ||
public void testRunLegacyQuery() { | ||
RunLegacyQuery.runLegacyQuery(); | ||
assertThat(bout.toString()).contains("Legacy query ran successfully"); | ||
} | ||
} |