CODEWITHSUNDEEP
mysqltriggers
9pixle
9pixle

Reputation: 556

Mysql three TRIGGERs to single trigger

My Mysql Table doesn't support create multiple triggers . but i have 3 triggers for three update queries, how can i run these triggers using single trigger,

ERROR :#1235 - This version of MySQL doesn't yet support 'multiple triggers with the same action time and event for one table'

thanks

 CREATE TRIGGER `update_yeild2` BEFORE UPDATE ON `today_plan`
 FOR EACH ROW SET NEW.yeild = COALESCE((SELECT kiln_master.yeild 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0)


CREATE TRIGGER `update_yeild1` BEFORE UPDATE ON `today_plan`
 FOR EACH ROW SET NEW.temp = COALESCE((SELECT kiln_master.temp 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0)

CREATE TRIGGER `update_yeild0` BEFORE UPDATE ON `today_plan`
 FOR EACH ROW SET NEW.kiln = COALESCE((SELECT kiln_master.kiln 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0)

UPDATED CODE : 

CREATE TRIGGER `update_yeild2` BEFORE UPDATE ON `today_plan`
 FOR EACH ROW 

BEGIN

SET NEW.yeild = COALESCE((SELECT kiln_master.yeild 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);


  SET NEW.temp = COALESCE((SELECT kiln_master.temp 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);

  SET NEW.kiln = COALESCE((SELECT kiln_master.kiln 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);

END

thanks

Working Code : thanks RandomSeed 

delimiter //

CREATE TRIGGER `update_yeild2` BEFORE UPDATE ON `today_plan`
 FOR EACH ROW 

BEGIN

SET NEW.yeild = COALESCE((SELECT kiln_master.yeild 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);


  SET NEW.temp = COALESCE((SELECT kiln_master.temp 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);

  SET NEW.kiln = COALESCE((SELECT kiln_master.kiln 
                   FROM kiln_master
                   WHERE NEW.itemno = kiln_master.item  
                   AND  NEW.pattern = kiln_master.pattern
                   LIMIT 1), 0);

END

//
delimiter ;

Upvotes: 0

Views: 173

Answers (1)

RandomSeed
RandomSeed

Reputation: 29769

Just include the three triggers' operations in one single trigger:

CREATE TRIGGER (...)
FOR EACH ROW
BEGIN
    SET NEW.yeild = (...) ;
    SET NEW.temp = (...) ;
    SET NEW.kiln = (...) ;
END ;

Upvotes: 1

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