| From: | "Zeugswetter Andreas ADI SD" <ZeugswetterA(at)spardat(dot)at> |
|---|---|
| To: | "Tom Lane" <tgl(at)sss(dot)pgh(dot)pa(dot)us>, "Alvaro Herrera" <alvherre(at)commandprompt(dot)com> |
| Cc: | "Bruce Momjian" <bruce(at)momjian(dot)us>, "Heikki Linnakangas" <heikki(at)enterprisedb(dot)com>, <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: [PATCHES] [pgsql-patches] Phantom Command IDs, updated patch |
| Date: | 2007-02-09 09:27:56 |
| Message-ID: | E1539E0ED7043848906A8FF995BDA57901C13306@m0143.s-mxs.net |
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| Lists: | pgsql-hackers pgsql-patches |
> As for what I think we *should* do near-term, I'm pretty strongly
> tempted to suggest that we just throw an error if a subtransaction
tries
> to upgrade an upper transaction's shared lock to exclusive.
So when a RI check locks a parent, you would not be able to update the
parent
in a later subtrans.
I can imagine, that the error would be a problem in a select for update
loop,
because there you usually want to update the row.
Andreas
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