Re: Function PostgreSQL 9.2

["drum.lucas@xxxxxxxxx" <drum.lucas@xxxxxxxxx>]

On 3 May 2016 at 12:44, drum.lucas@xxxxxxxxx <drum.lucas@xxxxxxxxx> wrote:

This is what I've done:

-- 1 - Creating the Sequence:

    CREATE SEQUENCE users_code_seq  
    INCREMENT 1  
    MINVALUE 1
    MAXVALUE 9223372036854775807  
    START 1000;
    CACHE 1;

-- 2 - Setting the DEFAULT

    ALTER TABLE public.users ALTER COLUMN code SET DEFAULT NEXTVAL('users_code_seq');

-- 3 - Setting the column as NOT NULL;

    ALTER TABLE public.users ALTER COLUMN code SET NOT NULL;

-- 4 - Setting the trigger

            CREATE TRIGGER public.update_code_column
              BEFORE UPDATE OR INSERT
              ON public.users
              FOR EACH ROW
              EXECUTE PROCEDURE public.users_code_seq;

-- 5 - Creating a CONSTRAINT UNIQUE

        ALTER TABLE public.users
          ADD CONSTRAINT uc_users_code UNIQUE("code");

Is that right?

Am I missing something?

Cheers

Lucas

Well.. I don't need to add a constraint if I already have a default value, that's right...

Anyway...

hmm.. actually.. it's a little bit different what I've done and what I need =(

1 - each user on the public.users table, is part of a company. Each company has a unique company_id

2 - Remember the default 1000 value? That value is per company.

Example:

Company Test1 - Company_id = 1

- user john01 = users.code: 1000

- user john02 = users.code: Nz

- user john03 = users.code: 1001

- user john04 = users.code: Nz

Company Test2 - Company_id = 2

- user matt01 = users.code: Text1

- user matt02 = users.code: 1000

- user matt03 = users.code: 1001

- user matt04 = users.code: 1002

Company Test3 - Company_id = 3

- user luke01 = users.code: 1000

- user luke02 = users.code: 1001

- user luke03 = users.code: Text2

- user luke04 = users.code: 1002

So, the default value is 1000 for EACH company. And the users must get the nextval value from there.

How can I do that?

Or at least if you guys can give me a direction...

Cheers