0
votes
1answer
205 views

Invalid rowid error

I'm trying to see, how UPDATE Lock helps to minimize error while dml (delete/update) operations. declare cursor update_lock is select empno from emp where deptno=&no for update of sal; num ...
2
votes
2answers
2k views

Parallel inserts cause deadlock on DB2

The scenario is the following: The application attempts to insert into the same table from two parallel threads making 4000 insertions in each thread (separate transaction per thread). It causes the ...
2
votes
1answer
137 views

Optimising a query using hint locks

I have a stored procedure that is being called very frequently. For some database servers it is as often as 20 times per second. Unfortunately because different clients call this procedure, I can't ...
1
vote
2answers
868 views

How to lock a Row while I'm using it

I want to be able to Lock a row, select it, increment its value, and then release the lock. (without lockin the other rows, so that other connections can work with the rest of the table) I've found ...