DELIMITER $$
CREATE OR REPLACE DEFINER=`vn`@`localhost` PROCEDURE `vn`.`worker_getHierarchy`(
	vUserFk INT
)
BEGIN
/**
 * Retorna una tabla temporal con los trabajadores que tiene
 * el usuario por debajo en la jerarquía de la empresa.
 *
 * @param vUserFk Id de usuario.
 * @return tmp.workerHierarchyList
 */
	CREATE OR REPLACE TEMPORARY TABLE tmp.workerHierarchyList
		(PRIMARY KEY (workerFk))
		ENGINE = MEMORY
		WITH RECURSIVE workerHierarchy AS (
			SELECT id workerFk, bossFk, 0 `depth`, CAST(id AS CHAR(255)) `path`
				FROM vn.worker
				WHERE id = vUserFk
			UNION ALL
			SELECT w.id, w.bossFk, wh.`depth` + 1, CONCAT(wh.`path`, ',', w.id)
				FROM vn.worker w
					JOIN workerHierarchy wh ON w.bossFk = wh.workerFk
				WHERE NOT FIND_IN_SET(w.id, wh.`path`)
		)
		SELECT *
			FROM workerHierarchy
			ORDER BY depth, workerFk;
END$$
DELIMITER ;
