Re: Setting a default for nextval sequence

On Mon, Nov 27, 2017 at 12:13 PM, Robert Lakes <robertl(at)propaas(dot)com> wrote:

> I'm attempting to set the default value for a serial column. I created a
> generic function that I am passing a table name as the only parameter. I
> had it working correctly, however, it does not seem to like the sequence
> name being the same name for each audit table that is created through the
> function.
> So I changed the code to include the table name as part of the naming
> convention. Now, I need help on how to alter the serial column the new
> value
>
> EXECUTE 'CREATE SEQUENCE '|| t_name ||'tab_id_seq'|| ' OWNED BY '|| t_name
> || '_cdc'||'.table_id';
>
> EXECUTE 'ALTER TABLE ' || quote_ident(t_name || '_cdc') || ' ALTER
> COLUMN table_id SET DEFAULT nextval(''tab_id_seq'');';
>

​Not tested but:​

​EXECUTE format('CREATE SEQUENCE %I OWNED BY %I.table_id',
t_name || 'tab_id_seq',
t_name ||​ '_cdc');

EXECUTE format('ALTER TABLE %I ALTER COLUMN table_id SET DEFAULT
nextval(%L);',
t_name || '_cdc',
t_name || 'tab_id_seq');

​David J.