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docs(samples): add query external sheet temp table (#659)
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Praful Makani committed Aug 7, 2020
1 parent 4b296a2 commit 904405039a2d4dbb865451d7b1ac9257cc54efd2
@@ -0,0 +1,97 @@
/*
* 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;

// [START bigquery_query_external_sheets_temp]
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.TableResult;
import com.google.common.collect.ImmutableSet;
import java.io.IOException;

// Sample to queries an external data source using a temporary table
public class QueryExternalSheetsTemp {

public static void runQueryExternalSheetsTemp() {
// TODO(developer): Replace these variables before running the sample.
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 WHERE name LIKE 'W%%'", tableName);
queryExternalSheetsTemp(tableName, sourceUri, schema, query);
}

public static void queryExternalSheetsTemp(
String tableName, String sourceUri, Schema schema, String query) {
try {

// 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"));

// 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();

// 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();

// Configure the external data source and query job.
ExternalTableDefinition externalTable =
ExternalTableDefinition.newBuilder(sourceUri, sheetsOptions).setSchema(schema).build();
QueryJobConfiguration queryConfig =
QueryJobConfiguration.newBuilder(query)
.addTableDefinition(tableName, externalTable)
.build();

// Example query to find states starting with 'W'
TableResult results = bigquery.query(queryConfig);

results
.iterateAll()
.forEach(row -> row.forEach(val -> System.out.printf("%s,", val.toString())));

System.out.println("Query on external temporary table performed successfully.");
} catch (BigQueryException | InterruptedException | IOException e) {
System.out.println("Query not performed \n" + e.toString());
}
}
}
// [END bigquery_query_external_sheets_temp]
@@ -0,0 +1,63 @@
/*
* 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 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.Test;

public class QueryExternalSheetsTempIT {

private ByteArrayOutputStream bout;
private PrintStream out;

@Before
public void setUp() {
bout = new ByteArrayOutputStream();
out = new PrintStream(bout);
System.setOut(out);
}

@After
public void tearDown() {
System.setOut(null);
}

@Test
public void testQueryExternalSheetsTemp() {
String tableName =
"EXTERNAL_SHEET_TEMP_TABLE_FROM_GCS_TEST_" + UUID.randomUUID().toString().substring(0, 8);
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 WHERE name LIKE 'W%%'", tableName);
QueryExternalSheetsTemp.queryExternalSheetsTemp(tableName, sourceUri, schema, query);
assertThat(bout.toString())
.contains("Query on external temporary table performed successfully.");
}
}

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