Parallel query, sequence scan.

2020-09-16 20:10:45 +08:00
parent 2fe5d2dc09
commit 5dfa9d8ed1
109 changed files with 6485 additions and 185 deletions
--- a/src/common/backend/utils/cache/relmapper.cpp
+++ b/src/common/backend/utils/cache/relmapper.cpp
@ -195,6 +195,13 @@ void RelationMapUpdateMap(Oid relationId, Oid fileNode, bool shared, bool immedi
                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
                    errmsg("cannot change relation mapping within subtransaction")));
        }
+
+        if (IsInParallelMode()) {
+            ereport(ERROR,
+                (errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+                    errmsg("cannot change relation mapping in parallel mode")));
+        }
+
        if (immediate) {
            /* Make it active, but only locally */
            if (shared) {