Re: Pulling data from a constraint def

From: "A(dot) Kretschmer" <andreas(dot)kretschmer(at)schollglas(dot)com>
To: pgsql-general(at)postgresql(dot)org
Subject: Re: Pulling data from a constraint def
Date: 2010-05-12 05:23:31
Message-ID: 20100512052331.GA20181@a-kretschmer.de
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In response to Gauthier, Dave :
> I have a constraint defined on a table....
>
> constraint design_style_is_invalid check (design_style in
> ('rls','sdp','rf','ssa','rom','rpt','analog','sdprpt','clkdist','global')),
>
> Is there a way to get the valid values in the list from the metadata somehow?

Sure, read the answer from Josh Kupershmidt. But keep in mind, internal
tables maybe changed in the next version -> your code isn't portable.

> I?d rather not put these in a table and implement with a foreogn key constraint
> for performance reasons. (Does that make sense?)

If i were you, i would use exactly this way.

Regards, Andreas
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Andreas Kretschmer
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