Re: ALTER TABLE ADD COLUMN takes forever

Hello Laurenz,

Thanks for your response

We are using PostgreSQL *v12.1*
There are no open transactions as the table is not blocked by any pid.
However when i check pg_locks it say *granted=false*
but nothing blocking it. Bit strange!!

Regards,
Devendra Yadav
On Mon, 29 Mar 2021, 22:44 Laurenz Albe, <laurenz(dot)albe(at)cybertec(dot)at> wrote:

> On Mon, 2021-03-29 at 22:38 +0530, Devendra Yadav wrote:
> > I am running a query on a table - ALTER TABLE mytable ADD COLUMN
> deposited DOUBLE PRECISION DEFAULT 0.0;
> >
> > this query just runs forever.
>
> Then either you are using a PostgreSQL version older than v11, or there
> is an open transaction that used the table and blocks you.
>
> Yours,
> Laurenz Albe
> --
> Cybertec | https://www.cybertec-postgresql.com
>
>