| From: | Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp> |
|---|---|
| To: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
| Cc: | Warren Volz <wrv(at)po(dot)cwru(dot)edu>, pgsql-bugs(at)postgresql(dot)org |
| Subject: | Re: Bug #514: Backend crashes periodically |
| Date: | 2001-11-14 00:14:02 |
| Message-ID: | 3BF1B74A.2BC4C9D4@tpf.co.jp |
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| Lists: | pgsql-bugs |
Tom Lane wrote:
>
> Hiroshi Inoue <Inoue(at)tpf(dot)co(dot)jp> writes:
> > BTW I have a question about this example.
> > Session 2 deletes no row because *session 1* already
> > deleted the rows but the session_del rule seems to
> > be invoked. Is it a right behavior ?
>
> Certainly the rule should be invoked --- whether it finds any rows
> cannot be determined until it's invoked, anyhow. Remember a rule
> is not a trigger, it is a transform applied to the query before
> we begin execution.
Hmm I may have misunderstood your explanation.
What I meant is
Session 2 invokes the session_del rule and really
updates a sis_user row by the rule though it deletes
no session row.
regards,
Hiroshi Inoue
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