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Back End Version-aware psql

From: David Fetter <david(at)fetter(dot)org>
To: PG Hackers <pgadmin-hackers(at)postgresql(dot)org>
Subject: Back End Version-aware psql
Date: 2003-07-31 20:37:11
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgadmin-hackers
Kind people,

I've been digging through the CVS code and trying to figure out the
best approach to making one psql that "does the right thing" for
different versions of the back-end.  This has come up in a real
situation already, where the dev box is 7.3.3 and the production box
is (Yikes!) 7.2.1.  Connecting from the 7.3.3 side results in a lot of
stuff like this:

ERROR:  parser: parse error at or near "."
Welcome to psql 7.3.3, the PostgreSQL interactive terminal.

Type:  \copyright for distribution terms
       \h for help with SQL commands
       \? for help on internal slash commands
       \g or terminate with semicolon to execute query
       \q to quit

template1=> \dt
ERROR:  parser: parse error at or near "."

Luckily, it works (so far) ok going from 7.2.1 -> 7.3.3, though.

So which files need consideration to make this reasonably seamless?
Are they all in src/bin/psql, or are there others elsewhere that
should know?

TIA :)

David Fetter david(at)fetter(dot)org
phone: +1 510 893 6100    cell: +1 415 235 3778


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