Re: BUG #5126: convert_to preventing index scan

Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> "Tom" == Tom Lane <tgl@sss.pgh.pa.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