Digging through the sqlsmith logging db, I noticed the following errors:
ERROR: cannot update SecondarySnapshot during a parallel operation
ERROR: cannot assign XIDs during a parallel operation
Queries raising the first one always contain calls to currtid() or
currtid2(). Queries raising the second one always contain a call to
pg_export_snapshot(). Patch to tag them as unsafe attached.
regards,
Andreas
diff --git a/src/include/catalog/pg_proc.h b/src/include/catalog/pg_proc.h
index f33c3ff..6a65e77 100644
--- a/src/include/catalog/pg_proc.h
+++ b/src/include/catalog/pg_proc.h
@@ -1347,9 +1347,9 @@ DATA(insert OID = 1291 ( suppress_redundant_updates_trigger PGNSP PGUID 12 1 0
DESCR("trigger to suppress updates when new and old records match");
DATA(insert OID = 1292 ( tideq PGNSP PGUID 12 1 0 0 0 f f f t t f i s 2 0 16 "27 27" _null_ _null_ _null_ _null_ _null_ tideq _null_ _null_ _null_ ));
-DATA(insert OID = 1293 ( currtid PGNSP PGUID 12 1 0 0 0 f f f f t f v s 2 0 27 "26 27" _null_ _null_ _null_ _null_ _null_ currtid_byreloid _null_ _null_ _null_ ));
+DATA(insert OID = 1293 ( currtid PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 27 "26 27" _null_ _null_ _null_ _null_ _null_ currtid_byreloid _null_ _null_ _null_ ));
DESCR("latest tid of a tuple");
-DATA(insert OID = 1294 ( currtid2 PGNSP PGUID 12 1 0 0 0 f f f f t f v s 2 0 27 "25 27" _null_ _null_ _null_ _null_ _null_ currtid_byrelname _null_ _null_ _null_ ));
+DATA(insert OID = 1294 ( currtid2 PGNSP PGUID 12 1 0 0 0 f f f f t f v u 2 0 27 "25 27" _null_ _null_ _null_ _null_ _null_ currtid_byrelname _null_ _null_ _null_ ));
DESCR("latest tid of a tuple");
DATA(insert OID = 1265 ( tidne PGNSP PGUID 12 1 0 0 0 f f f t t f i s 2 0 16 "27 27" _null_ _null_ _null_ _null_ _null_ tidne _null_ _null_ _null_ ));
DATA(insert OID = 2790 ( tidgt PGNSP PGUID 12 1 0 0 0 f f f t t f i s 2 0 16 "27 27" _null_ _null_ _null_ _null_ _null_ tidgt _null_ _null_ _null_ ));
@@ -3135,7 +3135,7 @@ DESCR("xlog filename, given an xlog location");
DATA(insert OID = 3165 ( pg_xlog_location_diff PGNSP PGUID 12 1 0 0 0 f f f f t f i s 2 0 1700 "3220 3220" _null_ _null_ _null_ _null_ _null_ pg_xlog_location_diff _null_ _null_ _null_ ));
DESCR("difference in bytes, given two xlog locations");
-DATA(insert OID = 3809 ( pg_export_snapshot PGNSP PGUID 12 1 0 0 0 f f f f t f v r 0 0 25 "" _null_ _null_ _null_ _null_ _null_ pg_export_snapshot _null_ _null_ _null_ ));
+DATA(insert OID = 3809 ( pg_export_snapshot PGNSP PGUID 12 1 0 0 0 f f f f t f v u 0 0 25 "" _null_ _null_ _null_ _null_ _null_ pg_export_snapshot _null_ _null_ _null_ ));
DESCR("export a snapshot");
DATA(insert OID = 3810 ( pg_is_in_recovery PGNSP PGUID 12 1 0 0 0 f f f f t f v s 0 0 16 "" _null_ _null_ _null_ _null_ _null_ pg_is_in_recovery _null_ _null_ _null_ ));
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