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<?php

/**

* Copyright 2016 Google Inc.

*

* 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.

*/

/**

* For instructions on how to run the full sample:

*

* @see https://github.com/GoogleCloudPlatform/php-docs-samples/tree/master/spanner/README.md

*

* For more information on this function:

*

* @see https://cloud.google.com/spanner/docs/secondary-indexes#storing_clause

*/

namespace Google\Cloud\Samples\Spanner;

// [START spanner_create_storing_index]

use Google\Cloud\Spanner\SpannerClient;

/**

* Adds an storing index to the example database.

*

* This sample uses the `MarketingBudget` column. You can add the column

* by running the `add_column` sample or by running this DDL statement against

* your database:

*

* ALTER TABLE Albums ADD COLUMN MarketingBudget INT64

*

* Example:

* ```

* create_storing_index($instanceId, $databaseId);

* ```

*

* @param string $instanceId The Spanner instance ID.

* @param string $databaseId The Spanner database ID.

*/

function create_storing_index($instanceId, $databaseId)

{

$spanner = new SpannerClient();

$instance = $spanner->instance($instanceId);

$database = $instance->database($databaseId);

$operation = $database->updateDdl(

'CREATE INDEX AlbumsByAlbumTitle2 ON Albums(AlbumTitle) ' .

'STORING (MarketingBudget)'

);

print('Waiting for operation to complete...' . PHP_EOL);

$operation->pollUntilComplete();

printf('Added the AlbumsByAlbumTitle2 index.' . PHP_EOL);

}

// [END spanner_create_storing_index]