From: | jwieck(at)debis(dot)com (Jan Wieck) |
---|---|
To: | tgl(at)sss(dot)pgh(dot)pa(dot)us (Tom Lane) |
Cc: | jwieck(at)debis(dot)com, hackers(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] equal: don't know whether nodes of type 600 are equal |
Date: | 1999-02-07 20:30:23 |
Message-ID: | m109aqV-000EBPC@orion.SAPserv.Hamburg.dsh.de |
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Thread: | |
Lists: | pgsql-hackers |
Tom Lane wrote:
> It looks to me like the problem is that some rewrite code got placed in
> pg_parse_and_plan() in postgres.c --- there is some UNION-handling stuff
> going on *after* the call to QueryRewrite(), and evidently that stuff
> is not duplicated in the EXPLAIN case. Probably the right fix is to
> move all that logic inside QueryRewrite() --- but I don't want to touch
> it without confirmation from someone who knows the parser/planner
> better.
It is the job of QueryRewrite() to puzzle/shuffle the nodes
of parsetrees before the planner get's them.
Jan
--
#======================================================================#
# It's easier to get forgiveness for being wrong than for being right. #
# Let's break this rule - forgive me. #
#======================================== jwieck(at)debis(dot)com (Jan Wieck) #
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