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MySQL Table update returning error

Posted on 2013-06-05
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535 Views
Last Modified: 2013-08-20
Hi,

I am using following SQL

update email a, contact b
set a.email =  CONCAT('abcd+' ,b.first_name,', ',b.last_name, '@gmail.com')  
where a.contact_id=b.id

I have an error
 #1442 - Can't update table 'contact' in stored function/trigger because it is already used by statement which invoked this stored function/trigger.

There are no triggers on the table.

Thanks
0
Comment
Question by:crazywolf2010
7 Comments
 
LVL 4

Expert Comment

by:apreed
ID: 39222652
Is this a stored function? If so, check the SQL code that calls this function and make sure "contact" is not already used as an alias in there within the same session.
0
 

Author Comment

by:crazywolf2010
ID: 39222676
Hi,
This is not stored function at all. I am running it under phpmyadmin.

Thanks
0
 
LVL 5

Accepted Solution

by:
sriramiyer earned 167 total points
ID: 39222796
you can try this,

update email a, contact b
set a.email =  CONCAT('abcd' ,b.first_name,b.last_name, '@gmail.com')  
where a.contact_id=b.id
0
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LVL 23

Assisted Solution

by:nemws1
nemws1 earned 333 total points
ID: 39223944
Try using the newer style syntax for such things (instead of doing a cross join)

UPDATE email AS a
  JOIN contact AS b
    ON a.contact_id = b.id
SET a.email = CONCAT('abcd', b.first_name, b.last_name, '@gmail.com')
;

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0
 

Author Comment

by:crazywolf2010
ID: 39224037
Exact same error
0
 
LVL 15

Expert Comment

by:Jagadishwor Dulal
ID: 39224378
What is the scenario I don't understand your question are you updating using two tables ?? can you post image for your table??
0
 
LVL 23

Assisted Solution

by:nemws1
nemws1 earned 333 total points
ID: 39226126
Is there a trigger on the 'contact' table?  I'm assuming when you originally stated "There are no triggers on the table." you meant the 'email' table.

Can you run this SQL command just to double-check? (replace 'your_database_name' with the name of your database)

SELECT TRIGGER_NAME
    , EVENT_OBJECT_TABLE
FROM information_schema.TRIGGERS
WHERE TRIGGER_SCHEMA = 'your_database_name'
;

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