Re: INSERT...ON DUPLICATE KEY LOCK FOR UPDATE - Mailing list pgsql-hackers

On Wed, Jan 15, 2014 at 8:23 PM, Peter Geoghegan <pg@heroku.com> wrote:
> I have an idea of what I could do to fix this, but I don't have time
> to make sure that my hunch is correct.

It might just be a matter of:

@@ -186,6 +186,13 @@ ExecLockHeapTupleForUpdateSpec(EState *estate,    switch (test)    {        case
HeapTupleInvisible:
+            /*
+             * Tuple may have originated from this command, in which case it's
+             * already locked
+             */
+            if (TransactionIdIsCurrentTransactionId(HeapTupleHeaderGetRawXmin(tuple.t_data))
&&
+                HeapTupleHeaderGetCmin(tuple.t_data) == estate->es_output_cid)
+                return true;            /* Tuple became invisible;  try again */            if
(IsolationUsesXactSnapshot())               ereport(ERROR,
 

-- 
Peter Geoghegan