On Sat, 2008-11-01 at 16:38 -0400, Tom Lane wrote: > Peter Eisentraut <[EMAIL PROTECTED]> writes: > > On Friday 31 October 2008 17:01:05 Kevin Grittner wrote: > >> (1) Can you compare a literal of the base type? > > > No, unless you create additional casts or operators. > > >> (2) Can you explicitly cast to the base type? > > > There is an implicit AS ASSIGNMENT cast between the base type and the > > distinct > > type in each direction. > > Hmm ... so out-of-the-box, a distinct type would have no applicable > functions/operators whatsoever. You couldn't even create an index on > it. This seems a bit too impoverished to be useful. And given the
I didn't have any problem creating and using an index on a distinct type at all. Regards, Jeff Davis postgres=# create type mytype as int; CREATE DOMAIN postgres=# create table mytable (foo mytype); CREATE TABLE postgres=# insert into mytable values (1),(2); INSERT 0 2 postgres=# create index myindex on mytable(foo); CREATE INDEX postgres=# set enable_seqscan = f; SET postgres=# explain select * from mytable order by foo desc; QUERY PLAN --------------------------------------------------------------------------------- Index Scan Backward using myindex on mytable (cost=0.00..12.28 rows=2 width=4) (1 row) postgres=# select * from mytable order by foo desc; foo ----- 2 1 (2 rows) -- Sent via pgsql-hackers mailing list (pgsql-hackers@postgresql.org) To make changes to your subscription: http://www.postgresql.org/mailpref/pgsql-hackers