On Fri, 27 Oct 2006, Ferindo Middleton wrote:
Is there a way to loop through individual query records within a stored
procedure or trigger. If I have table called client_names (id SERIAL, first
name TEXT, middlename TEXT, lastname TEXT, suffix TEXT, pet_id INT,
properly_trained TEXT) and I have a trigger on it, I'd like to iterate
through individual query rows back at another table having a foreign key on
pet_id. For example:
CREATE TRIGGER
update_clients_with_week_assignment_based_on_pet_id_in_pets_table
BEFORE INSERT
ON client_names
FOR EACH ROW
BEGIN
(SELECT * FROM pets;)
label1: LOOP
IF (pets row.pet_type) = 4 THEN
SET properly_trained = 1;
ITERATE label1;
END IF;
LEAVE label1;
END LOOP label1;
SET @x = p1;
END
Is this possible. Can you loop through the query results of a SELECT
statement in a trigger, function, or procedure.
Ferindo
Check out the section on cursors:
http://dev.mysql.com/doc/refman/5.0/en/cursors.html
That allows you to walk over a result set.
-w
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