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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

*/

namespace Google\Cloud\Samples\Spanner;

// [START spanner_query_data_with_index]

use Google\Cloud\Spanner\SpannerClient;

/**

* Queries sample data from the database using SQL and an index.

*

* The index must exist before running this sample. You can add the index

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

* your database:

*

* CREATE INDEX AlbumsByAlbumTitle ON Albums(AlbumTitle)

*

* Example:

* ```

* query_data_with_index($instanceId, $databaseId);

* ```

*

* @param string $instanceId The Spanner instance ID.

* @param string $databaseId The Spanner database ID.

* @param string $startTitle The start of the title index.

* @param string $endTitle The end of the title index.

*/

function query_data_with_index($instanceId, $databaseId, $startTitle, $endTitle)

{

$spanner = new SpannerClient();

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

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

$parameters = [

'startTitle' => $startTitle,

'endTitle' => $endTitle

];

$results = $database->execute(

'SELECT AlbumId, AlbumTitle, MarketingBudget ' .

'FROM Albums@{FORCE_INDEX=AlbumsByAlbumTitle} ' .

'WHERE AlbumTitle >= @startTitle AND AlbumTitle < @endTitle',

['parameters' => $parameters]

);

foreach ($results as $row) {

printf('AlbumId: %s, AlbumTitle: %s, MarketingBudget: %d' . PHP_EOL,

$row['AlbumId'], $row['AlbumTitle'], $row['MarketingBudget']);

}

}

// [END spanner_query_data_with_index]