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Re: update functions locking tables

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Clodoaldo Pinto <clodoaldo.pinto@xxxxxxxxx> writes:
> I've been trying for 3 days to figure out what is happening to no
> avail. What am i missing about transactions and MVCC? What could make
> a plpgsql update function lock a table?

What is the function doing to the table, exactly?  DDL changes generally
take exclusive locks ...

			regards, tom lane

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TIP 9: In versions below 8.0, the planner will ignore your desire to
       choose an index scan if your joining column's datatypes do not
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