WorkgroupPinTable::getSelectExpression

static function getSelectExpression(): string
{
	$tableName = static::getTableName();

	return "
		IF(
			EXISTS(
				SELECT 'x'
				FROM {$tableName}
				WHERE
					GROUP_ID = %s
					AND USER_ID = %s
					AND CONTEXT = %s
			),
			'Y',
			'N'
		)
	";
}