Re: Setting a default for nextval sequence

On Mon, Nov 27, 2017 at 2:24 PM, David G. Johnston <
david(dot)g(dot)johnston(at)gmail(dot)com> wrote:

> 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.
>
>

*Do you mean ?*

*https://www.postgresql.org/docs/9.6/static/functions-sequence.html
<https://www.postgresql.org/docs/9.6/static/functions-sequence.html>*

*SELECT setval(regclass, bigint) --- Set sequence's current value*

--
*Melvin Davidson*
I reserve the right to fantasize. Whether or not you
wish to share my fantasy is entirely up to you.