From: Tom Lane <tgl@sss.pgh.pa.us>
To: Rod Taylor <rbt@rbt.ca>
Cc: PostgreSQL Development <pgsql-hackers@postgresql.org>
Cc: pgsql-interfaces@postgresql.org
Subject: Re: Roadmap for FE/BE protocol redesign
Date: Mon, 10 Mar 2003 14:30:22 -0500
Message-ID: <19294.1047324622@sss.pgh.pa.us> (raw)
In-Reply-To: <1047324016.99075.31.camel@jester>
References: <19041.1047322279@sss.pgh.pa.us>
<1047324016.99075.31.camel@jester>
Rod Taylor <rbt@rbt.ca> writes:
> I'd be tempted to make a startup packet that will allow libpq to revert
> back to old protocols easily enough for the future so that we can do=20
> incremental changes to the protocol.
We already have that: you send a startup packet with a version less than
the latest, and the backend speaks that version to you.
One thing I want to do though is relax the protocol-level constraints
on certain message contents: for example, if ErrorMessage becomes a
collection of labeled fields, it should be possible to add new field
types without calling it a protocol revision. The protocol need only
specify "ignore any fields whose label you do not recognize".
regards, tom lane
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To: pgsql-interfaces@postgresql.org
Cc: tgl@sss.pgh.pa.us, rbt@rbt.ca, pgsql-hackers@postgresql.org
Subject: Re: Roadmap for FE/BE protocol redesign
In-Reply-To: <19294.1047324622@sss.pgh.pa.us>
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