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<?php

/**

* Copyright 2018 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.

*/

/**

* For instructions on how to run the full sample:

*

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

*/

namespace Google\Cloud\Samples\Spanner;

// [START spanner_dml_standard_update]

use Google\Cloud\Spanner\SpannerClient;

use Google\Cloud\Spanner\Transaction;

/**

* Updates sample data in the database with a DML statement.

*

* This requires the `MarketingBudget` column which must be created before

* running this sample. 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:

* ```

* update_data($instanceId, $databaseId);

* ```

*

* @param string $instanceId The Spanner instance ID.

* @param string $databaseId The Spanner database ID.

*/

function update_data_with_dml($instanceId, $databaseId)

{

$spanner = new SpannerClient();

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

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

$database->runTransaction(function (Transaction $t) use ($spanner) {

$rowCount = $t->executeUpdate(

"UPDATE Albums "

. "SET MarketingBudget = MarketingBudget * 2 "

. "WHERE SingerId = 1 and AlbumId = 1");

$t->commit();

printf('Updated %d row(s).' . PHP_EOL, $rowCount);

});

}

// [END spanner_dml_standard_update]