Error in PLpgSQL with SELECT INTO and composite types
Tested on 8.2, 8.3 and CVS HEAD:
CREATE TYPE atype AS (a int);
CREATE TYPE btype AS (compcol atype);
CREATE FUNCTION foofunc() RETURNS void AS $$
declare
avar atype;
bvar btype;
begin
SELECT '("(1)")'::btype INTO bvar; -- Should work, but errors
end;
$$ LANGUAGE plpgsql;
SELECT foofunc();
Gives error:
ERROR: invalid input syntax for integer: "(1)"
CONTEXT: PL/pgSQL function "foofunc" line 6 at SQL statement
Surely assigning a value of btype to a variable of the same type should
always work..
--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com
Heikki Linnakangas <heikki.linnakangas@enterprisedb.com> writes:
SELECT '("(1)")'::btype INTO bvar; -- Should work, but errors
No, because it's expecting the SELECT to yield a separate column for
each column of the composite variable bvar. Something like
SELECT ('("(1)")'::btype).* INTO bvar;
would be correct. To make it work the way you're thinking would break
a lot of code that expects the existing semantics --- instead of
select expr1, expr2 into two_column_record_var from ...
people would have to write something like
select row(expr1, expr2) into two_column_record_var from ...
regards, tom lane