Re: Function PostgreSQL 9.2

On Tue, Apr 19, 2016 at 3:23 PM, drum(dot)lucas(at)gmail(dot)com <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"();
>
>
>
The need to do "WHERE users.code ~ '^\d+$' means your model is poorly
specified.
​

>
>
>
> CREATE OR REPLACE FUNCTION "public"."auto_generate_client_code_if_empty"
>> () RETURNS "trigger"
>> VOLATILE
>> AS $dbvis$
>> BEGIN
>> END;
>> $dbvis$ LANGUAGE plpgsql;
>
>
>
It would be nice if you actually showed some work here...​

>
>
>> CREATE TRIGGER "increment_client_code"
>> BEFORE INSERT OR UPDATE ON users
>> FOR EACH ROW
>> EXECUTE PROCEDURE "auto_generate_client_code_if_empty"();
>
>
>
​
​I'd question the need to execute this trigger on UPDATE...​

​

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

​The stuff that goes between "BEGIN" and "END" in
auto_generate_client_code_if_empty...?

David J.
​