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docs(samples): add query external sheet permanent table (#658)
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Praful Makani
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samples/snippets/src/main/java/com/example/bigquery/QueryExternalSheetsPerm.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_external_sheets_perm] | ||
import com.google.auth.oauth2.GoogleCredentials; | ||
import com.google.auth.oauth2.ServiceAccountCredentials; | ||
import com.google.cloud.bigquery.BigQuery; | ||
import com.google.cloud.bigquery.BigQueryException; | ||
import com.google.cloud.bigquery.BigQueryOptions; | ||
import com.google.cloud.bigquery.ExternalTableDefinition; | ||
import com.google.cloud.bigquery.Field; | ||
import com.google.cloud.bigquery.GoogleSheetsOptions; | ||
import com.google.cloud.bigquery.QueryJobConfiguration; | ||
import com.google.cloud.bigquery.Schema; | ||
import com.google.cloud.bigquery.StandardSQLTypeName; | ||
import com.google.cloud.bigquery.TableId; | ||
import com.google.cloud.bigquery.TableInfo; | ||
import com.google.cloud.bigquery.TableResult; | ||
import com.google.common.collect.ImmutableSet; | ||
import java.io.IOException; | ||
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// Sample to queries an external data source using a permanent table | ||
public class QueryExternalSheetsPerm { | ||
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public static void runQueryExternalSheetsPerm() { | ||
// TODO(developer): Replace these variables before running the sample. | ||
String datasetName = "MY_DATASET_NAME"; | ||
String tableName = "MY_TABLE_NAME"; | ||
String sourceUri = | ||
"https://docs.google.com/spreadsheets/d/1i_QCL-7HcSyUZmIbP9E6lO_T5u3HnpLe7dnpHaijg_E/edit?usp=sharing"; | ||
Schema schema = | ||
Schema.of( | ||
Field.of("name", StandardSQLTypeName.STRING), | ||
Field.of("post_abbr", StandardSQLTypeName.STRING)); | ||
String query = | ||
String.format("SELECT * FROM %s.%s WHERE name LIKE 'W%%'", datasetName, tableName); | ||
queryExternalSheetsPerm(datasetName, tableName, sourceUri, schema, query); | ||
} | ||
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public static void queryExternalSheetsPerm( | ||
String datasetName, String tableName, String sourceUri, Schema schema, String query) { | ||
try { | ||
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// Create credentials with Drive & BigQuery API scopes. | ||
// Both APIs must be enabled for your project before running this code. | ||
GoogleCredentials credentials = | ||
ServiceAccountCredentials.getApplicationDefault() | ||
.createScoped( | ||
ImmutableSet.of( | ||
"https://www.googleapis.com/auth/bigquery", | ||
"https://www.googleapis.com/auth/drive")); | ||
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// 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.newBuilder().setCredentials(credentials).build().getService(); | ||
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// Skip header row in the file. | ||
GoogleSheetsOptions sheetsOptions = | ||
GoogleSheetsOptions.newBuilder() | ||
.setSkipLeadingRows(1) // Optionally skip header row. | ||
.setRange("us-states!A20:B49") // Optionally set range of the sheet to query from. | ||
.build(); | ||
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TableId tableId = TableId.of(datasetName, tableName); | ||
// Create a permanent table linked to the Sheets file. | ||
ExternalTableDefinition externalTable = | ||
ExternalTableDefinition.newBuilder(sourceUri, sheetsOptions).setSchema(schema).build(); | ||
bigquery.create(TableInfo.of(tableId, externalTable)); | ||
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// Example query to find states starting with 'W' | ||
TableResult results = bigquery.query(QueryJobConfiguration.of(query)); | ||
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results | ||
.iterateAll() | ||
.forEach(row -> row.forEach(val -> System.out.printf("%s,", val.toString()))); | ||
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System.out.println("Query on external permanent table performed successfully."); | ||
} catch (BigQueryException | InterruptedException | IOException e) { | ||
System.out.println("Query not performed \n" + e.toString()); | ||
} | ||
} | ||
} | ||
// [END bigquery_query_external_sheets_perm] |
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samples/snippets/src/test/java/com/example/bigquery/QueryExternalSheetsPermIT.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; | ||
import static junit.framework.TestCase.assertNotNull; | ||
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import com.google.cloud.bigquery.Field; | ||
import com.google.cloud.bigquery.Schema; | ||
import com.google.cloud.bigquery.StandardSQLTypeName; | ||
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; | ||
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public class QueryExternalSheetsPermIT { | ||
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private String tableName; | ||
private ByteArrayOutputStream bout; | ||
private PrintStream out; | ||
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private static final String BIGQUERY_DATASET_NAME = requireEnvVar("BIGQUERY_DATASET_NAME"); | ||
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private static String requireEnvVar(String varName) { | ||
String value = System.getenv(varName); | ||
assertNotNull( | ||
"Environment variable " + varName + " is required to perform these tests.", | ||
System.getenv(varName)); | ||
return value; | ||
} | ||
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@BeforeClass | ||
public static void checkRequirements() { | ||
requireEnvVar("BIGQUERY_DATASET_NAME"); | ||
} | ||
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@Before | ||
public void setUp() { | ||
bout = new ByteArrayOutputStream(); | ||
out = new PrintStream(bout); | ||
System.setOut(out); | ||
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// Create a test table | ||
tableName = | ||
"EXTERNAL_SHEETS_TABLE_FROM_GCS_TEST_" + UUID.randomUUID().toString().substring(0, 8); | ||
bout = new ByteArrayOutputStream(); | ||
out = new PrintStream(bout); | ||
System.setOut(out); | ||
} | ||
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@After | ||
public void tearDown() { | ||
// Clean up | ||
DeleteTable.deleteTable(BIGQUERY_DATASET_NAME, tableName); | ||
System.setOut(null); | ||
} | ||
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@Test | ||
public void testQueryExternalSheetsPerm() { | ||
String sourceUri = | ||
"https://docs.google.com/spreadsheets/d/1i_QCL-7HcSyUZmIbP9E6lO_T5u3HnpLe7dnpHaijg_E/edit?usp=sharing"; | ||
Schema schema = | ||
Schema.of( | ||
Field.of("name", StandardSQLTypeName.STRING), | ||
Field.of("post_abbr", StandardSQLTypeName.STRING)); | ||
String query = | ||
String.format( | ||
"SELECT * FROM %s.%s WHERE name LIKE 'W%%'", BIGQUERY_DATASET_NAME, tableName); | ||
QueryExternalSheetsPerm.queryExternalSheetsPerm( | ||
BIGQUERY_DATASET_NAME, tableName, sourceUri, schema, query); | ||
assertThat(bout.toString()) | ||
.contains("Query on external permanent table performed successfully."); | ||
} | ||
} |