mysql 过程不返回任何行

Question

为什么在我创建并执行过程并填充返回0行后mysql查询执行成功，是否受到影响，是否是因为组是预保留字？

    CREATE
PROCEDURE getNamesFrmAllSchedCol(IN p_schedule_id INT(11))
SELECT g.group, h.hall, l.lush, u.user, s.subject
FROM
  scheduler sch
INNER JOIN groups g ON g.group_id=sch.group_id
INNER JOIN halls h ON h.hall_id=sch.hall_id
INNER JOIN lush l ON l.lush_id=sch.lush_id
INNER JOIN users u ON u.user_id=sch.user_id
INNER JOIN subjects s ON s.subject_id=sch.subject_id
WHERE
  sch.schedule_id = p_schedule_id

When executing created procedure

After executing returns 0 rows while it should return 1

Answer 1

Affected_rows 不适用于 select；适用于更新、插入、删除