From: Tom Lane <tgl@sss.pgh.pa.us>
To: pgsql-committers@lists.postgresql.org
Subject: pgsql: Doc: remove misleading info about ecpg's CONNECT/DISCONNECT DEFA
Date: Wed, 25 Oct 2023 21:35:18 +0000
Message-ID: <E1qvlX3-002Jkj-Kd@gemulon.postgresql.org> (raw)
Doc: remove misleading info about ecpg's CONNECT/DISCONNECT DEFAULT.
As far as I can see, ecpg has no notion of a "default" open
connection. You can do "CONNECT TO DEFAULT" but that just specifies
letting libpq use all its default connection parameters --- the
resulting connection is not special subsequently. In particular,
SET CONNECTION = DEFAULT and DISCONNECT DEFAULT simply act on a
connection named DEFAULT, if you've made one; they do not have
special lookup rules. But the documentation of these commands
makes it look like they do.
Simplest fix, I think, is just to remove the paras suggesting that
DEFAULT is special here.
Also, SET CONNECTION *does* have one special lookup rule, which
is that it recognizes CURRENT as an alias for the currently selected
connection. SET CONNECTION = CURRENT is a no-op, so it's pretty
useless, but nonetheless it does something different from selecting
a connection by name; so we'd better document it.
Per report from Sylvain Frandaz. Back-patch to all supported
versions.
Discussion: https://postgr.es/m/169824721149.1769274.1553568436817652238@wrigleys.postgresql.org
Branch
------
REL_12_STABLE
Details
-------
https://git.postgresql.org/pg/commitdiff/c45a45fedbcffecfcd318a0a9349d3e1bbfb5e49
Modified Files
--------------
doc/src/sgml/ecpg.sgml | 22 ++--------------------
1 file changed, 2 insertions(+), 20 deletions(-)
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To: pgsql-committers@postgresql.org
Cc: tgl@sss.pgh.pa.us, pgsql-committers@lists.postgresql.org
Subject: Re: pgsql: Doc: remove misleading info about ecpg's CONNECT/DISCONNECT DEFA
In-Reply-To: <E1qvlX3-002Jkj-Kd@gemulon.postgresql.org>
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