Thread: ROW SHARE/SELECT ... FOR UPDATE + foreign keys

Thomas F. O'Connell wrote:
> What would people think of adding a note to the ROW SHARE section of
> Table-Level Locks remarking on the fact that referential integrity
> checks expressed through foreign keys do SELECT ... FOR UPDATES.
>
> http://www.postgresql.org/docs/8.0/static/explicit-
> locking.html#LOCKING-TABLES
>
> It was somewhat challenging today to try to track down a pervasive
> locking issue related to a table not directly referenced in a stored
> procedure but that was referenced by a key in a table that was being
> updated.
>
> I'm not sure how this changes with the new shared row locking
> implementation in 8.1...
>

8.1 will use _shared_ row locks for such cases.

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