Re: Pseudoconstant quals versus the join removal patch - Mailing list pgsql-hackers

From Robert Haas
Subject Re: Pseudoconstant quals versus the join removal patch
Date
Msg-id AANLkTikx3oBJiFoKFmOY9wTtqTeyrO8Hyp5fXqJrpNAB@mail.gmail.com
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In response to Re: Pseudoconstant quals versus the join removal patch  (Tom Lane <tgl@sss.pgh.pa.us>)
Responses Re: Pseudoconstant quals versus the join removal patch  (Robert Haas <robertmhaas@gmail.com>)
List pgsql-hackers
On Tue, Sep 14, 2010 at 7:26 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> I wrote:
>> I think that it's probably sufficient to make remove_rel_from_query run
>> through the rel's joininfo list looking for pseudoconstant quals, and
>> push those back into the joininfo lists with a reduced join list.  I
>> wonder though if there's a better way, or if there are related bugs
>> this fix won't cover.  Any thoughts?
>
> On reflection I decided that outerjoin-delayed quals could probably have
> the same problem.  I've changed the code so that all quals not clearly
> attached to the specific outer join we're removing will be modified to
> ensure they're still evaluated at the right time.

Thanks for jumping on this.  FTR, I don't read pgsql-sql.

--
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company


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