Franco Bruno Borghesi wrote:
> yes, i was trying to do something like that, but it breaks always in the same
> place, first I thought that it was because of the way I was assigning values
> to the fields of my row, but now I'm beginning to think that the reason is
> the way I pass the row to f2.
>
> Here is the error:
> franco=# SELECT f1();
> WARNING: Error occurred while executing PL/pgSQL function f1
> WARNING: line 5 at select into variables
> ERROR: Attribute "result" not found
>
> CREATE TYPE mytype AS (val1 INTEGER, val2 INTEGER, val3 INTEGER);
>
> CREATE OR REPLACE FUNCTION f1() RETURNS mytype AS '
> DECLARE
> result mytype%ROWTYPE;
> BEGIN
> result.val1:=1;
> SELECT val2, val3 INTO result.val2, result.val3 FROM f2(result);
It looks like plpgsql doesn't support composite type variables as
arguments to functions that are called from within a function. The error
is saying it cannot find an attribute named result -- that's because
there is no *attribute* called result, there is a rowtype variable.
I'm not sure right off what is involved in fixing this, but you can
always pass the individual attributes to f2:
CREATE TYPE mytype AS (val1 INTEGER, val2 INTEGER, val3 INTEGER);
CREATE OR REPLACE FUNCTION f2(int,int,int) RETURNS mytype AS '
DECLARE arg1 ALIAS FOR $1; arg2 ALIAS FOR $2; arg3 ALIAS FOR $3; newval2 int; newval3 int; result
mytype%ROWTYPE;
BEGIN newval2 := coalesce(arg2,2) * arg1; newval3 := coalesce(arg3,3) * arg1; SELECT INTO result.val1,
result.val2,result.val3 arg1, newval2, newval3; RETURN result;
END;
' LANGUAGE 'plpgsql';
CREATE OR REPLACE FUNCTION f1(int) RETURNS mytype AS '
DECLARE result mytype%ROWTYPE;
BEGIN result.val1:=$1; SELECT INTO result.val2, result.val3 val2, val3 FROM f2(result.val1, result.val2,
result.val3); RETURN result;
END;
' LANGUAGE 'plpgsql';
regression=# select * from f1(2); val1 | val2 | val3
------+------+------ 2 | 4 | 6
(1 row)
HTH,
Joe
