| From: | Osvaldo Kussama <osvaldo(dot)kussama(at)gmail(dot)com> |
|---|---|
| To: | sharmi_jo(at)yahoo(dot)com |
| Cc: | General postgres mailing list <pgsql-general(at)postgresql(dot)org> |
| Subject: | Re: NOVALIDATE in postgresql? |
| Date: | 2009-02-19 19:43:45 |
| Message-ID: | 690707f60902191143l4aece0k20782597c763e586@mail.gmail.com |
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| Lists: | pgsql-general |
2009/2/19 SHARMILA JOTHIRAJAH <sharmi_jo(at)yahoo(dot)com>:
> Hi
> In Oracle I can use the NOVALIDATE for constraints... like this
> ALTER TABLE employee ADD
> CONSTRAINT emp_ck
> CHECK (married IN ('Y','N')) NO VALIDATE;
>
> When the table is already populated this will be faster. Can you do the same in Postgresql?
>
>From manual:
"Adding a CHECK or NOT NULL constraint requires scanning the table to
verify that existing rows meet the constraint."
http://www.postgresql.org/docs/current/interactive/sql-altertable.html
Osvaldo
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