Passing a ROWTYPE to a function
I'm trying to write a function that takes a %ROWTYPE as an argument.
I'm just not sure how to call it from another function.
This is what I tried:
CREATE TABLE t1 (x int, y int);
INSERT INTO t1 VALUES (1, 2);
CREATE OR REPLACE FUNCTION g1(t1) RETURNS int LANGUAGE plpgsql AS '
BEGIN
RETURN $1.y;
END';
CREATE OR REPLACE FUNCTION g2(int) RETURNS int LANGUAGE plpgsql AS '
DECLARE item t1%ROWTYPE;
BEGIN
SELECT INTO item * FROM t1 WHERE x = $1;
RETURN g1(item);
END';
SELECT g2(1);
This is what I got:
CREATE TABLE
INSERT 28089 1
CREATE FUNCTION
CREATE FUNCTION
psql:/tmp/test.sql:16: ERROR: column "item" does not exist
CONTEXT: PL/pgSQL function "g2" line 4 at return
I'm using posgresql 7.4.6.
Thanks.
Eric Brown
408-571-6341
www.propel.com
Eric Brown <eric.brown@propel.com> writes:
CREATE OR REPLACE FUNCTION g2(int) RETURNS int LANGUAGE plpgsql AS '
DECLARE item t1%ROWTYPE;
BEGIN
SELECT INTO item * FROM t1 WHERE x = $1;
RETURN g1(item);
END';
This works in 8.0 but not earlier releases --- there was not support in
plpgsql for using whole-row variables in expressions.
regards, tom lane
On Wed, Jan 05, 2005 at 05:04:03AM -0800, Eric Brown wrote:
I'm trying to write a function that takes a %ROWTYPE as an argument.
The code you posted works in 8.0. Here's an item from the 8.0
Release Notes:
* More support for composite types (row and record variables) in PL/pgSQL
For example, it now works to pass a rowtype variable to another
function as a single variable.
I don't think you could do this in versions prior to 8.0; see
previous discussion in the list archives. For example:
http://archives.postgresql.org/pgsql-general/2004-03/msg00862.php
--
Michael Fuhr
http://www.fuhr.org/~mfuhr/