Re: PERFORM not working properly, please help..

Hi Pavel, thanks for reply. Your solution:

CREATE OR REPLACE FUNCTION A3() RETURNS VOID AS $BODY$
begin
 return query select * from A1();
 return;
end;
$BODY$ LANGUAGE 'plpgsql';

generates error "cannot use RETURN QUERY in a non-SETOF function" because A3 returns VOID.


"Pavel Stehule" <pavel.stehule@gmail.com> napisał(a):
 > Hello
 >
 > 2010/2/18  <wilczarz1@op.pl>:
 > > I have a function A1 that returns setof records, and I use it in two ways:
 > > 1) from function A2, where I need results from A1
 > > 2) from function A3, where I don't need these results, all I need is to
 > > execute logic from A1
 > >
 > > Here ale very simple versions of my functions:
 > >
 > > CREATE OR REPLACE FUNCTION A1() RETURNS setof record AS $BODY$
 > > begin
 > >  -- some logic here
 > >  return query select col from tab;
 > > end;
 > > $BODY$ LANGUAGE 'plpgsql';
 > >
 > > CREATE OR REPLACE FUNCTION A2() RETURNS setof record AS $BODY$
 > > begin
 > >  -- some logic here
 > >  return query select * from A1() as dummy ( x double precision);
 > > end;
 > > $BODY$ LANGUAGE 'plpgsql';
 > >
 > > CREATE OR REPLACE FUNCTION A3() RETURNS VOID AS $BODY$
 > > begin
 > >  perform A1();
 > > end;
 > > $BODY$ LANGUAGE 'plpgsql';
 > >
 > > And here are my function calls:
 > > select * from A1() as(x double precision) --ok
 > > select * from A2() as(x double precision) --ok
 > > select * from A3(); --not ok, argh!
 > >
 >
 > it is correct. Every function has own stack for result. There are not
 > some global stack. Perform just run function and doesn't copy inner
 > result's stack to outer result stack.
 >
 > your A3 function have to be
 > begin
 >   return query select * from a1
 >   return;
 > end;
 >
 > like a2 function
 >
 > regards
 > Pavel Stehule
 > > The last one generates error "set-valued function called in context that
 > > cannot accept a set". Why doesn't PERFORM work here? Thanks for help..
 > >