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Re: [INTERFACES] Upgrading the backend's error-message infrastructure

From: Peter Eisentraut <peter_e(at)gmx(dot)net>
To: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
Cc: pgsql-hackers(at)postgreSQL(dot)org, <pgsql-interfaces(at)postgreSQL(dot)org>
Subject: Re: [INTERFACES] Upgrading the backend's error-message infrastructure
Date: 2003-03-16 14:06:19
Message-ID: Pine.LNX.4.44.0303160302550.3020-100000@peter.localdomain (view raw or flat)
Thread:
Lists: pgsql-hackerspgsql-interfaces
Tom Lane writes:

> Given that we now need order-of-thirty possible field types, do you feel
> uncomfortable with a single-byte field identifier in the FE/BE protocol?
> I'm still leaning that way on the grounds of compactness and programming
> simplicity, but I can see where someone might want to argue it won't do
> in the long run.

There's a possible solution:  SQL99 part 3 defines numerical codes for
each of these fields (table 12/section 5.14).  The codes are between
around 0 and 40.  (Don't be confused by the negative code numbers in the
table; those are only for use within ODBC.)

-- 
Peter Eisentraut   peter_e(at)gmx(dot)net


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