Hi,
On October 8, 2018 10:14:34 AM PDT, Tom Lane <tgl@sss.pgh.pa.us> wrote:
>Peter Eisentraut <peter.eisentraut@2ndquadrant.com> writes:
>> On 02/10/2018 16:58, Andres Freund wrote:
>>> It's a bit weird to make this decision based on these two timestamps
>>> differing. For one, it only indirectly seems to be guaranteed that
>>> xactStartTimestamp is even set to anything here (to 0 by virtue of
>being
>>> a global var).
>
>> Maybe but it seems to be the simplest way without doing major surgery
>to
>> all this code.
>
>This patch doesn't apply over 07ee62ce9. Also, I like the
>timestamp-comparison approach even less than Andres does: I think it's
>probably outright broken, especially since it treats the equality case
>as license to advance xactStartTimestamp.
>
>Surely there is some way that we can directly test whether we're inside
>a
>procedure or not? I think the logic should be basically
>
> if (!IsParallelWorker())
>+ {
>+ if (!InsideProcedure())
> xactStartTimestamp = stmtStartTimestamp;
>+ else
>+ xactStartTimestamp = GetCurrentTimestamp();
>+ }
> else
> Assert(xactStartTimestamp != 0);
Seems more reasonable from here.
Andres
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