Re: [GENERAL] pl/pgsql and arrays[]

[Maxim Boguk]

On Mon, Dec 5, 2011 at 3:53 PM, Pavel Stehule <pavel.steh...@gmail.com>wrote:

> Hello
>
> it work on my pc
>
> postgres=# \sf fx
> CREATE OR REPLACE FUNCTION public.fx()
>  RETURNS SETOF integer
>  LANGUAGE plpgsql
> AS $function$ declare g int[] = '{20}';
> begin
>  return next g[1];
>  return;
> end;
> $function$
> postgres=# select fx();
>  fx
> ----
>  20
> (1 row)
>
> regards
>
> Pavel Stehule
>

Oh sorry.
Seems I didn't tested simple cases.

Error happened when you work with record[] types and return setof:

create table test (id serial);
insert into test select generate_series(1,10);

CREATE OR REPLACE FUNCTION _test_array()
RETURNS SETOF test
LANGUAGE plpgsql
AS $$
DECLARE
    _array test[];
    _row   test%ROWTYPE;
BEGIN
     SELECT array(SELECT test FROM test) INTO _array;

     --work
     --_row := _array[1];
     --RETURN NEXT _row;

     --also work
     --RETURN QUERY SELECT (_array[1]).*;

     --error
     --RETURN NEXT _array[1];

     --error
     --RETURN NEXT (_array[1]);

     --error
     --RETURN NEXT (_array[1]).*;

     RETURN;
END;
$$;





>
> 2011/12/5 Maxim Boguk <maxim.bo...@gmail.com>:
> > Some quetions about pl/pgsql and arrays[].
> >
> > Is such constructions as:
> >
> > RETURN NEXT array[1];
> >
> > OR
> >
> > SELECT val INTO array[1] FROM ...;
> >
> > Should not work?
> >
> > At least documentation about RETURN NEXT  says:
> > "RETURN NEXT expression;"
> >
> > I think array[1] is a valid expression.
> >
> > --
> > Maxim Boguk
> > Senior Postgresql DBA.
>



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