Re: Schema version management

From: Dimitri Fontaine <dimitri(at)2ndQuadrant(dot)fr>
To: Alvaro Herrera <alvherre(at)commandprompt(dot)com>
Cc: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, Joel Jacobson <joel(at)trustly(dot)com>, Vik Reykja <vikreykja(at)gmail(dot)com>, Michael Glaesemann <grzm(at)seespotcode(dot)net>, Andrew Dunstan <andrew(at)dunslane(dot)net>, Gurjeet Singh <singh(dot)gurjeet(at)gmail(dot)com>, Robert Haas <robertmhaas(at)gmail(dot)com>, Peter Eisentraut <peter_e(at)gmx(dot)net>, Pg Hackers <pgsql-hackers(at)postgresql(dot)org>
Subject: Re: Schema version management
Date: 2012-07-05 21:52:12
Message-ID: m2obnt3mgj.fsf@2ndQuadrant.fr
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Alvaro Herrera <alvherre(at)commandprompt(dot)com> writes:
> However I am also against what seems to be the flow. Normally, you
> don't write overloaded plpgsql functions such as "equal". Case in
> point, the equality functions in core have funny names like "int4eq" and
> so on. Instead, at least in my experience, the overloaded functions
> people seem to have in their databases are like do_stuff_to_foobars()
> and you have one version for foos and another one for bars.

+1

I too want to have my overloaded functions all in the same file, as much
as to have made that the only behavior in getddl.py:

https://github.com/dimitri/getddl

> If you're doing lots of equality functions, surely it would make more
> sense to package them up as an extension anyway along with all the other
> thingies you need for the type you're supposedly writing. So it's a
> completely different market than what we're aiming at here.

+1

Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> FWIW, I'm attracted to the all-similarly-named-functions-together
> method, mainly because it dodges the problem of how to encode a
> function's argument list into a filename. However, we're being
> short-sighted to only think of functions here. What about operators?
> Or casts? Those don't have simple names either.

I would argue like Álvaro that when dealing with operators and casts
you're probably writing an extension already, and we're providing
another way to deal with that.

Regards,
--
Dimitri Fontaine
http://2ndQuadrant.fr PostgreSQL : Expertise, Formation et Support

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