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Re: Repeated PredicateLockRelation calls during seqscan - Mailing list pgsql-hackers

From Tom Lane
Subject Re: Repeated PredicateLockRelation calls during seqscan
Date
Msg-id 29470.1308752899@sss.pgh.pa.us
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In response to Repeated PredicateLockRelation calls during seqscan  (Dan Ports <drkp@csail.mit.edu>)
Responses Re: Repeated PredicateLockRelation calls during seqscan
Re: Repeated PredicateLockRelation calls during seqscan
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Dan Ports <drkp@csail.mit.edu> writes:
> I was looking at ExecSeqScan today and noticed that it invokes
> PredicateLockRelation each time it's called, i.e. for each tuple
> returned. Any reason we shouldn't skip that call if
> rs_relpredicatelocked is already set, as in the attached patch?

Why is the call in ExecSeqScan at all, and not in the node startup
function?
        regards, tom lane

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