On Mon, 25 Jun 2007 17:56:28 +0100 Gregory Stark <[EMAIL PROTECTED]> wrote: > > This seems odd. It's not deciding that it's ambiguous or coming from another > datatype for which no implicit cast exists. It knows perfectly well that it > wants to convert to text but fails? > > > postgres=# select 'a'||b from (select 'b' as b) as x; > ERROR: failed to find conversion function from unknown to text
It isn't the destination type that is the problem here but the source. I suppose that it could default 'b' to text but really, that isn't necessarily what '' signifies. How about '2007-06-25'? Is that text, date or timestamp? Try this. select 'a'||b from (select 'b'::text as b) as x; -- D'Arcy J.M. Cain <[EMAIL PROTECTED]> | Democracy is three wolves http://www.druid.net/darcy/ | and a sheep voting on +1 416 425 1212 (DoD#0082) (eNTP) | what's for dinner. ---------------------------(end of broadcast)--------------------------- TIP 1: if posting/reading through Usenet, please send an appropriate subscribe-nomail command to [EMAIL PROTECTED] so that your message can get through to the mailing list cleanly
