On Tue, Jan 6, 2009 at 7:18 PM, Tom Lane <t...@sss.pgh.pa.us> wrote: > "Gurjeet Singh" <singh.gurj...@gmail.com> writes: > >> This is a horrendously bad idea; it will bite your *ss sooner or later, > >> probably sooner. > > > Can you please let us know how this would be problematic? > > The point is that it's going to have unknown, untested effects on the > default coercion rules, possibly leading to silent changes in the > behavior of queries that used to work. If you'd rather retest every one > of your other queries than fix this one, then go ahead. > > Changing the query is an option not given to us. It is being migrated from a BigDB.
I was working on these solutions assuming that these are workarounds to a bug. But from your mails, it seems that it is an expected behaviour; is it? If we consider the second branch of UNION ALL of both the queries above, if "select '' " yields a text column, then so should a "select * from (select '')". Its not exactly a bug, but sure is a problem that we should try to resolve. Thanks and best regards, -- gurjeet[.sin...@enterprisedb.com singh.gurj...@{ gmail | hotmail | indiatimes | yahoo }.com EnterpriseDB http://www.enterprisedb.com Mail sent from my BlackLaptop device