| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | Martín Marqués <martin(at)bugs(dot)unl(dot)edu(dot)ar> |
| Cc: | pgsql-sql(at)postgresql(dot)org, pgsql-general(at)postgresql(dot)org |
| Subject: | Re: [SQL] delete with cascade |
| Date: | 2001-05-04 22:24:09 |
| Message-ID: | 1698.989015049@sss.pgh.pa.us |
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| Lists: | pgsql-general pgsql-sql |
=?iso-8859-1?q?Mart=EDn=20Marqu=E9s?= <martin(at)bugs(dot)unl(dot)edu(dot)ar> writes:
> I was reading the manuals on DELETE and I saw this:
> By default DELETE will delete tuples in the table specified and all its
> sub-tables. If you wish to only update the specific table mentioned, you
> should use the ONLY clause.
> I just don't understand what sub-tables means.
It means inheritance children, ie, tables you created with INHERIT
from the specified table.
> Does it mean that it will
> delete rows on other tables which are referenced with a FOREIGN KEY to the
> row which will be deleted?
Foreign key deletion is an unrelated feature.
regards, tom lane
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