Re: what exactly is a query structure?

"A. Kretschmer" <andreas.kretschmer@schollglas.com> writes:
> In response to silly sad :
>> my own wild guess:
>> string constant '*' is of type "unknown"

> Maybe. Add a explicit cast, for instance '*'::text

Definitely.  More recent versions of PG provide a more explicit error
message:

regression=# SELECT * from get_noobs();
ERROR:  structure of query does not match function result type
DETAIL:  Returned type unknown does not match expected type text in column "pass".
CONTEXT:  PL/pgSQL function "get_noobs" line 2 at RETURN QUERY
        regards, tom lane