Re: PERFORM not working properly, please help..

And what about that :
http://www.postgresql.org/docs/8.4/interactive/xfunc-sql.html#XFUNC-SQL-FUNCTIONS-RETURNING-SET

Maybe my french english disallowed me to understand right the question,
but I think that this item could help in a way!

Le vendredi 19 février 2010 à 11:04 +0100, Pavel Stehule a écrit :

> 2010/2/19 <wilczarz1(at)op(dot)pl>:
> > 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.
>
> problem is in A3, cannot be void.
>
> PostgreSQL has only function. It hasn't "procedures" where you can
> execute unbinded queries. So if you can take any result from any
> rutine, you have to take it explicitly. VOID in pg means, there are no
> any interesting result, really no any interesting result. It can be
> problem, when you know MySQL procedures or MSSQL procedures. You have
> to forgot on procedures with returning recordset or multirecordset as
> secondary effect.
>
> regards
> Pavel Stehule
>
> >
> >
> > "Pavel Stehule" <pavel(dot)stehule(at)gmail(dot)com> napisał(a):
> > > Hello
> > >
> > > 2010/2/18 <wilczarz1(at)op(dot)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
> > > > Â -- some logic here
> > > > Â return query select col from tab;
> > > > end;
> > > > $BODY$ LANGUAGE 'plpgsql';
> > > >
> > > > CREATE OR REPLACE FUNCTION A2() RETURNS setof record AS $BODY$
> > > > begin
> > > > Â -- some logic here
> > > > Â return query select * from A1() as dummy ( x double precision);
> > > > end;
> > > > $BODY$ LANGUAGE 'plpgsql';
> > > >
> > > > CREATE OR REPLACE FUNCTION A3() RETURNS VOID AS $BODY$
> > > > begin
> > > > Â 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..
> > > >
> >
> >
>