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Re: Backend Question

From: Chris Bitmead <chris(at)bitmead(dot)com>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: Postgres Hackers List <hackers(at)postgreSQL(dot)org>
Subject: Re: Backend Question
Date: 2000-07-03 14:38:38
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-hackers
Tom Lane wrote:
> Chris Bitmead <chris(at)bitmead(dot)com> writes:
> > Can anyone tell me what the concept of a "group" is in
> > backend/libpq/portal.c? There are functions like PQntuplesGroup,
> > PQfnumberGroup, PQfsizeGroup, PQftypeGroup etc etc.
> Once upon a time it probably supported something like the ability to
> merge tuples of different types into a SELECT result.  It does not
> now: a little scanning shows there is no way to get no_groups above 1
> in the current logic.
> You should realize, however, that all that backend-PQexec code is dead
> code and has been for a long time.  It's unlikely that it works at all
> any more, considering all the changes that have gone on while it sits
> untested on the sidelines.  I proposed ripping it out a few months ago,
> and no one objected ... but I haven't got round to it yet.

Why is it dead code? Why is it no longer necessary?

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