I have a Postgres function which is returning a table:
CREATE OR REPLACE FUNCTION testFunction() RETURNS TABLE(a int, b int) AS
$BODY$
DECLARE a int DEFAULT 0;
DECLARE b int DEFAULT 0;
BEGIN
CREATE TABLE tempTable AS SELECT a, b;
RETURN QUERY SELECT * FROM tempTable;
DROP TABLE tempTable;
END;
$BODY$
LANGUAGE plpgsql;
This function is not returning data in row and column form. Instead it returns data as:
(0,0)
That is causing a problem in Coldfusion cfquery block in extracting data. How do I get data in rows and columns when a table is returned from this function? In other words: Why does the PL/pgSQL function not return data as columns?
To get individual columns instead of the row type, call the function with:
SELECT * FROM testfunction();
Just like you would select all columns from a table.
Also consider this reviewed form of your test function:
CREATE OR REPLACE FUNCTION testfunction()
RETURNS TABLE(a int, b int)
LANGUAGE plpgsql AS
$func$
DECLARE
_a int := 0;
_b int := 0;
BEGIN
CREATE TEMP TABLE tbl AS SELECT _a, _b;
RETURN QUERY SELECT * FROM tbl;
DROP TABLE tempTable;
END
$func$;
In particular:
DECLARE
key word is only needed once.OUT
parameters in the RETURNS TABLE (...)
clause.The temporary table is completely useless in the example (probably over-simplified). You could reduce to:
CREATE OR REPLACE FUNCTION testfunction(OUT a int, OUT b int)
LANGUAGE plpgsql AS
$func$
BEGIN
a := 0;
b := 0;
END
$func$;