Обсуждение: Variable not found in subplan target lists, PostgreSQL 8.1 beta3

Hi,

I have a query that throws error "Variable not found in subplan target
lists".
This should allow it to be reproduce.

create temporary table table1 (
  col1 integer not null,
  col2 integer not null
);

create temporary table table2 ();

create or replace function udftable1row(integer, integer) returns table1 AS
$$
   select $1, $2;
$$ language sql immutable;

create or replace function udf(table1) returns void as $$
$$ language sql immutable;

-- This throws "Variable not found in subplan target lists"
select
   udf(t1)
from
   udftable1Row(1,2) t1

   cross join table2;

-- Now that we have Row constructor, I can get rid of
my function udftable1row() and this works ok

select
   udf(t1)
from
   (select (cast(row(1,2) as table1)).*) t1

   cross join table2;

I am on PostgreSQL 8.1 beta3 under Windows XP Service Pack 2.

Thanks,
Jean-Pierre Pelletier
e-djuster

"Jean-Pierre Pelletier" <pelletier_32@sympatico.ca> writes:
> I have a query that throws error "Variable not found in subplan target
> lists".
> This should allow it to be reproduce.

This seems to be fixed already in beta4.  But thanks for the report!

Relevant fix is:

2005-10-19 13:31  tgl

    * src/backend/optimizer/plan/createplan.c: Fix oversight in recent
    changes to enable the 'physical tlist' optimization for subquery
    and function scan nodes: we can't just do it unconditionally, we
    still have to check whether there is any need for a whole-row Var.
    I had been thinking that these node types couldn't have any system
    columns, which is true, but that loop is also checking for attno
    zero, ie, whole-row Var.  Fix comment to not be so misleading.    Per
    test case from Richard Huxton.


            regards, tom lane