Re: Polymorphic arguments and composite types

Simon Riggs <simon@2ndquadrant.com> writes:
> ...which is fine on just one table, but I want to join...

> postgres=# select * from c where col1 = any (select col2 from c);
> ERROR:  operator does not exist: integer = integer[]

That isn't a join.  Are you looking for something like

select * from c, c as c2 where c.col1 = any (c2.col2)
        regards, tom lane