nextcloud / server

			$table->addUniqueIndex(['objecttype', 'objectid', 'systemtagid'], 'mapping');

		}

		if (!$schema->hasTable('systemtag_group')) {

			$table = $schema->createTable('systemtag_group');

			$table->addColumn('systemtagid', 'integer', [

				'notnull' => true,

				'length' => 4,

				'default' => 0,

			]);

			$table->addColumn('gid', 'string', [

				'notnull' => true,

			]);

			$table->setPrimaryKey(['gid', 'systemtagid']);

		}

		if (!$schema->hasTable('file_locks')) {

			$table = $schema->createTable('file_locks');

			$table->addIndex(['section'], 'personal_settings_section');

		}

		if (!$schema->hasTable('accounts')) {

			$table = $schema->createTable('accounts');

			$table->addColumn('uid', 'string', [

				'notnull' => true,

				'length' => 64,

				'default' => '',

			]);

			$table->addColumn('data', 'text', [

				'notnull' => true,

				'default' => '',

			]);

			$table->setPrimaryKey(['uid']);

		}

		return $schema;

	}