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<?php

/**

* 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.

*/

/**

* 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_delete_data]

use Google\Cloud\Spanner\SpannerClient;

use Google\Cloud\Spanner\KeyRange;

use Google\Cloud\Core\Exception\GoogleException;

/**

* Deletes sample data from the given database.

*

* @param string $instanceId The Spanner instance ID.

* @param string $databaseId The Spanner database ID.

* @throws GoogleException

*/

function delete_data($instanceId, $databaseId)

{

$spanner = new SpannerClient();

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

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

// Delete individual rows

$albumsToDelete = $spanner->keySet([

'keys' => [[2, 1], [2, 3]]

]);

$database->delete('Albums', $albumsToDelete);

// Delete a range of rows where the column key is >=3 and <5

// NOTE: A KeyRange must include a start and end.

// NOTE: startType and endType both default to KeyRange::TYPE_OPEN.

$singersRange = $spanner->keyRange([

'startType' => KeyRange::TYPE_CLOSED,

'start' => [3],

'endType' => KeyRange::TYPE_OPEN,

'end' => [5]

]);

$singersToDelete = $spanner->keySet([

'ranges' => [$singersRange]

]);

$database->delete('Singers', $singersToDelete);

// Delete remaining Singers rows, which will also delete the remaining

// Albums rows because Albums was defined with ON DELETE CASCADE

$remainingSingers = $spanner->keySet([

'all' => true

]);

$database->delete('Singers', $remainingSingers);

print('Deleted data.' . PHP_EOL);

}

// [END spanner_delete_data]