I'm trying to figure out a way to detect an occurrence of rollback in a MySQL stored procedure so I could handle the situation accordingly from a PHP script, but so far I can not find any solution.
My stored procedure looks like this:
delimiter |
create procedure multi_inserts(
IN var1 int(11),
.
.
.
IN string1 text
)
BEGIN
declare exit handler for sqlexception rollback;
declare exit handler for sqlwarning rollback;
START TRANSACTION;
insert into table1(a,b,c,d) values(var1,var2,var3,var4);
insert into table2(e,f,g) values(var5,var6,string1);
COMMIT;
END
delimiter ;
I did a rollback test on this procedure and it did rollback but I got no false. I want my stored procedure to throw some kind of error message if the transaction failed, so I could handle it like this:
$result = mysql_query($procedure);
if(!$result)
{
//rollback occured do something
}
Is there a way to detect rollback in MySQL? Am I missing something? Any reply will be appreciated. Thanks for reading.
Thanks to your advices I fixed this problem. Here's what I did:
Stored Procedure
delimiter |
create procedure multi_inserts(
IN var1 int(11),
.
.
.
IN string1 text
)
BEGIN
declare exit handler for sqlexception sqlwarning
BEGIN
rollback;
select -1;
END;
START TRANSACTION;
insert into table1(a,b,c,d) values(var1,var2,var3,var4);
insert into table2(e,f,g) values(var5,var6,string1);
COMMIT;
END
delimiter ;
If I use out variable instead of select -1, it gives me this error:
OUT or INOUT argument is not a variable or NEW pseudo-variable in BEFORE trigger
I don't know what did I wrong, but I couldn't fix this problem.
PHP script
$result=mysqli_query($con,$procedure);
if(is_object($result))
{
//rollback happened do something!
}
If the SP is successful it throws true.
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You can add an output param and then set it to the value you want in your exit handlers. Here's an example using your proc: |
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