| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> |
| Cc: | peter_e(at)gmx(dot)net (Peter Eisentraut), Roman Kapusta <roman(dot)kapusta(at)gmail(dot)com>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: BUG #5126: convert_to preventing index scan |
| Date: | 2009-10-22 22:08:29 |
| Message-ID: | 14250.1256249309@sss.pgh.pa.us |
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| Lists: | pgsql-bugs |
Andrew Gierth <andrew(at)tao11(dot)riddles(dot)org(dot)uk> writes:
> "Tom" == Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> writes:
> Tom> The conversion itself is dependent on changeable catalog
> Tom> entries, ie, pg_conversion. So "stable" seems the appropriate
> Tom> marking to me.
> That sounds like a bit of a stretch to me... we treat lots of stuff as
> immutable which is actually easier to change than pg_conversion entries
> (OS locale definitions for example).
Um ... locale *is* fixed within a given database, or at least LC_COLLATE
and LC_CTYPE are. If you see cases where we have this wrong, they may
need to be revisited.
regards, tom lane
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