| From: | Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> |
|---|---|
| To: | Robert Haas <robertmhaas(at)gmail(dot)com> |
| Cc: | Andres Freund <andres(at)2ndquadrant(dot)com>, Simon Riggs <simon(at)2ndquadrant(dot)com>, "pgsql-hackers(at)postgresql(dot)org" <pgsql-hackers(at)postgresql(dot)org> |
| Subject: | Re: parallel mode and parallel contexts |
| Date: | 2015-01-06 03:59:35 |
| Message-ID: | CAA4eK1KgfbEyLCWaqU4Q5i1ETn6R1znf9L-W1AKQ_cq5iFiYJQ@mail.gmail.com |
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| Lists: | pgsql-hackers |
On Mon, Jan 5, 2015 at 9:57 PM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>
> On Sat, Jan 3, 2015 at 7:31 PM, Andres Freund <andres(at)2ndquadrant(dot)com>
wrote:
>
> > * Doesn't the restriction in GetSerializableTransactionSnapshotInt()
> > apply for repeatable read just the same?
>
> Yeah. I'm not sure whether we really need that check at all, because
> there is a check in GetTransactionSnapshot() that probably checks the
> same thing.
>
The check in GetSerializableTransactionSnapshotInt() will also prohibit
any user/caller of SetSerializableTransactionSnapshot() in parallel mode
as that can't be prohibited by GetTransactionSnapshot().
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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