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2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >
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This article shares with you the content of sample analysis of MySQL cursors and exception handling. The editor thinks it is very practical, so share it with you as a reference and follow the editor to have a look.
Complex exception handling
Drop procedure if exists t2
Delimiter $$
Create procedure T2 ()
Begin
Declare done int default 0
Declare vResult int default 0
Declare vUserID bigint
Declare vBalance int
Declare pChecksum varchar (32)
Declare cur_test CURSOR for select * from user
DECLARE CONTINUE HANDLER FOR NOT FOUND SET done = 1
Open cur_test
Repeat
Fetch cur_test into vUserID, vBalance,pChecksum
If done! = 1 then
Set vResult:=vResult+vBalance
End if
Until done end repeat
Close cur_test
Select vResult
End$$
Delimiter
Call T2 ()
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