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Editing: Version14000Date20180404140050.php

<?php

declare(strict_types=1);

/**
 * SPDX-FileCopyrightText: 2018 Nextcloud GmbH and Nextcloud contributors
 * SPDX-License-Identifier: AGPL-3.0-or-later
 */
namespace OC\Core\Migrations;

use OCP\DB\ISchemaWrapper;
use OCP\IDBConnection;
use OCP\Migration\IOutput;
use OCP\Migration\SimpleMigrationStep;

/**
 * Auto-generated migration step: Please modify to your needs!
 */
class Version14000Date20180404140050 extends SimpleMigrationStep {
	public function __construct(
		private IDBConnection $connection,
	) {
	}

public function name(): string {
		return 'Add lowercase user id column to users table';
	}

public function description(): string {
		return 'Adds "uid_lower" column to the users table and fills the column to allow indexed case-insensitive searches';
	}

/**
	 * @param IOutput $output
	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 * @return null|ISchemaWrapper
	 */
	public function changeSchema(IOutput $output, \Closure $schemaClosure, array $options) {
		/** @var ISchemaWrapper $schema */
		$schema = $schemaClosure();

$table = $schema->getTable('users');

$table->addColumn('uid_lower', 'string', [
			'notnull' => false,
			'length' => 64,
			'default' => '',
		]);
		$table->addIndex(['uid_lower'], 'user_uid_lower');

return $schema;
	}

/**
	 * @param IOutput $output
	 * @param \Closure $schemaClosure The `\Closure` returns a `ISchemaWrapper`
	 * @param array $options
	 */
	public function postSchemaChange(IOutput $output, \Closure $schemaClosure, array $options) {
		$qb = $this->connection->getQueryBuilder();

$qb->update('users')
			->set('uid_lower', $qb->func()->lower('uid'));
		$qb->executeStatement();
	}
}

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