From: | Scott Geller <sgellergsu(at)gmail(dot)com> |
---|---|
To: | pgsql-general(at)postgresql(dot)org |
Subject: | Dynamic plpgsql help |
Date: | 2010-04-04 16:18:14 |
Message-ID: | h2lc598163c1004040918gce411fc9ybdf5fba189998274@mail.gmail.com |
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Lists: | pgsql-general |
Hi
I have the following plpgsql function that works:
DROP TYPE if exists distr CASCADE;
CREATE TYPE distr AS (b bigint, var varchar);
DROP FUNCTION IF EXISTS dist() cascade;
CREATE or replace FUNCTION dist() RETURNS setof distr
AS $$ begin
return query EXECUTE 'Select count(*) as b, cast(mostype as varchar)
as var from segmentation group by mostype';
end $$ LANGUAGE 'plpgsql' VOLATILE;
;
select * from dist();
When I try to make it dynamic, I get the error:
ERROR: column "mostype" does not exist
DROP TYPE if exists distr CASCADE;
CREATE TYPE distr AS (b bigint, var varchar);
DROP FUNCTION IF EXISTS dist(text) cascade;
CREATE or replace FUNCTION dist(text) RETURNS setof distr
AS $$ begin
return query execute 'Select count(*) as b, cast( ' ||
quote_ident($1) || ' as varchar) as var from segmentation group by '
|| quote_ident($1);
end $$ LANGUAGE 'plpgsql' VOLATILE;
;
select dist(mostype);
Your help is appreciated
Scott
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