pg_stat_statement normalization fails due to temporary tables

From: Andres Freund <andres(at)2ndquadrant(dot)com>
To: pgsql-hackers(at)postgresql(dot)org
Subject: pg_stat_statement normalization fails due to temporary tables
Date: 2014-12-02 13:07:20
Message-ID: 20141202130720.GF2456@alap3.anarazel.de
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Hi,

pg_stat_statement's query normalization fails when temporary tables are
used in a query. That's because JumbleRangeTable() uses the relid in the
RTE to build the query fingerprint. I think in this case pgss from 9.1
actually would do better than 9.2+ as the hash lookup previously didn't
use the relid.

I don't really have a good idea about fixing this though. The best thing
that comes to mind is simply use eref->aliasname for the
disambiguation...

Greetings,

Andres Freund

--
Andres Freund http://www.2ndQuadrant.com/
PostgreSQL Development, 24x7 Support, Training & Services

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