/
RelaxColumnModeIT.java
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/
RelaxColumnModeIT.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.
*/
package com.example.bigquery;
import static com.google.common.truth.Truth.assertThat;
import static junit.framework.TestCase.assertNotNull;
import com.google.cloud.bigquery.Field;
import com.google.cloud.bigquery.Field.Mode;
import com.google.cloud.bigquery.LegacySQLTypeName;
import com.google.cloud.bigquery.Schema;
import java.io.ByteArrayOutputStream;
import java.io.PrintStream;
import java.util.UUID;
import org.junit.After;
import org.junit.Before;
import org.junit.BeforeClass;
import org.junit.Test;
public class RelaxColumnModeIT {
private ByteArrayOutputStream bout;
private PrintStream out;
private static final String BIGQUERY_DATASET_NAME = System.getenv("BIGQUERY_DATASET_NAME");
private static void requireEnvVar(String varName) {
assertNotNull(
"Environment variable " + varName + " is required to perform these tests.",
System.getenv(varName));
}
@BeforeClass
public static void checkRequirements() {
requireEnvVar("BIGQUERY_DATASET_NAME");
}
@Before
public void setUp() throws Exception {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
}
@After
public void tearDown() {
System.setOut(null);
}
@Test
public void testRelaxColumnMode() {
// Create a new table with REQUIRED columns for each test to relax its column mode since this is
// a one-way operation
String generatedTableName =
"gcloud_test_table_temp_" + UUID.randomUUID().toString().replace('-', '_');
Schema originalSchema =
Schema.of(
// The only supported modification you can make to a column's mode is changing it from
// REQUIRED to NULLABLE
// Changing a column's mode from REQUIRED to NULLABLE is also called column relaxation
// INFO: LegacySQLTypeName will be updated to StandardSQLTypeName in release 1.103.0
Field.newBuilder("word", LegacySQLTypeName.STRING).setMode(Mode.REQUIRED).build(),
Field.newBuilder("word_count", LegacySQLTypeName.STRING)
.setMode(Field.Mode.REQUIRED)
.build(),
Field.newBuilder("corpus", LegacySQLTypeName.STRING)
.setMode(Field.Mode.REQUIRED)
.build(),
Field.newBuilder("corpus_date", LegacySQLTypeName.STRING)
.setMode(Field.Mode.REQUIRED)
.build());
CreateTable.createTable(BIGQUERY_DATASET_NAME, generatedTableName, originalSchema);
// Relax table column mode
RelaxColumnMode.relaxColumnMode(BIGQUERY_DATASET_NAME, generatedTableName);
assertThat(bout.toString()).contains("Table schema successfully relaxed.");
}
}