Re: add column with default value is very slow - Mailing list pgsql-performance

On Tue, Sep 11, 2012 at 07:20:28PM +0600, AI Rumman wrote:
> I have a table as follows:
> I execued the query:
> ALTER TABLE entity ADD COLUMN owner_type char(1) NOT NULL default 'U';
>
> The db is stuck. The enity table has 2064740 records;

such alter table has to rewrite whole table. So it will take a while

> Watching locks:

output of this was perfectly unreadable, because your email client
wrapped lines at some random places.

In future - please put such dumps on some paste site, or just attach it
to mail, and not copy/paste them to body of message.

Best regards,

depesz

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