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Example Analysis of MySQL cursor and exception handling

2025-01-18 Update From: SLTechnology News&Howtos shulou NAV: SLTechnology News&Howtos > Database >

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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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