Heikki Linnakangas <[EMAIL PROTECTED]> writes: > [EMAIL PROTECTED] wrote: >> The function convert_to(string text, dest_encoding name) is not allowed to >> be used in a index expression, because it is not marked as "IMMUTABLE".
> You can change the way a conversion is done with CREATE/DROP CONVERSION. > That's why it can't be IMMUTABLE. The other reason is that it depends on the database encoding. I suppose you could make an argument that that's fixed for as long as IMMUTABLE needs to think about --- but we'd have to remember to undo the marking if database encoding ever becomes less fixed. Just out of curiosity, what's the use-case for this function in an index anyway? regards, tom lane -- Sent via pgsql-bugs mailing list (pgsql-bugs@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-bugs