Re: Function PostgreSQL 9.2

Hi all,

I've got two tables:

- users

- companies 

I'm trying to create a function that:

• if users.code is empty, it gives a default value 
  
• And the increment_client_code in company should auto increment for the next client code
  

What I've done so far:

DROP FUNCTION IF EXISTS client_code_increment_count();
CREATE OR REPLACE FUNCTION "public"."client_code_increment_count" () RETURNS TABLE("code" INT) AS
$BODY$
SELECT MAX(CAST(users.code AS INT)) FROM users WHERE users.code ~ '^\d+$' AND company_id = 2
$BODY$
LANGUAGE sql;
SELECT * FROM "client_code_increment_count"();

CREATE OR REPLACE FUNCTION "public"."auto_generate_client_code_if_empty" () RETURNS "trigger"
 VOLATILE
AS $dbvis$
BEGIN
END;
$dbvis$ LANGUAGE plpgsql;

CREATE TRIGGER "increment_client_code"
BEFORE INSERT OR UPDATE ON users
FOR EACH ROW
EXECUTE PROCEDURE "auto_generate_client_code_if_empty"();

But still can't do that works.. What Am I missing?