Re: transction_timestamp() inside of procedures - Mailing list pgsql-hackers

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);


            regards, tom lane