Re: Function PostgreSQL 9.2

On 04/19/2016 03:23 PM, drum(dot)lucas(at)gmail(dot)com wrote:
> 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?

Information. eg.:

The schema for the tables.

Why is not just adding a DEFAULT value to the users.code not an option?

What the default code should be or how it is to be calculated?

What is increment_client_code?

Does increment_client_code relate to users or some other table, say clients?

>
> Cheers
>

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com