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Re: Natural sort order

From: Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>
To: Richard Klingler <richard(at)klingler(dot)net>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: Natural sort order
Date: 2012-02-29 16:08:46
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Lists: pgsql-sql
Richard Klingler <richard(at)klingler(dot)net> writes:
> Took some time until I could try out this...
> But as soon I want to create the fcuntion based index it tells me:
> 	Error : ERROR:  functions in index expression must be marked IMMUTABLE

FWIW, this example works fine for me.  Maybe you have some weird
user-defined version of substr() or ~ that isn't immutable?

			regards, tom lane

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