mysql-function

问题 I am not very familiar with MYSQL functions & exception handling. After all the research I could come up with below, but to no gain. I am trying to return 0 if insert statement execution fails and 1 otherwise. Exception is getting raised instead of being handled. Where am i going wrong? CREATE DEFINER=`myusr`@`localhost` FUNCTION `func1`(p1 varchar(50), p2 varchar(6)) RETURNS int(1) READS SQL DATA DETERMINISTIC BEGIN DECLARE EXP DATETIME; DECLARE RINT INT(1); DECLARE CONTINUE HANDLER FOR

问题 I'm trying to create an aggregated function MEDIAN() in MySQL like MIN(), MAX(), AVG() which takes the input the column name or string that has concatenated values of the desired column. I'm having trouble understanding the limitations of MySQL custom functions & would be really helpful if some can help me find out how this is done. Example: MySQL table has 2 columns (ID, num) +----+-----+ | id | num | +----+-----+ | 1 | 5 | | 1 | 6 | | 1 | 7 | | 2 | 1 | | 2 | 3 | | 2 | 5 | +----+-----+

问题 I'm trying to create an aggregated function MEDIAN() in MySQL like MIN(), MAX(), AVG() which takes the input the column name or string that has concatenated values of the desired column. I'm having trouble understanding the limitations of MySQL custom functions & would be really helpful if some can help me find out how this is done. Example: MySQL table has 2 columns (ID, num) +----+-----+ | id | num | +----+-----+ | 1 | 5 | | 1 | 6 | | 1 | 7 | | 2 | 1 | | 2 | 3 | | 2 | 5 | +----+-----+