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-rw-r--r--src/backend/executor/execMain.c4
-rw-r--r--src/backend/executor/execUtils.c4
2 files changed, 7 insertions, 1 deletions
diff --git a/src/backend/executor/execMain.c b/src/backend/executor/execMain.c
index df6af1b898c..2c4b1ab77e3 100644
--- a/src/backend/executor/execMain.c
+++ b/src/backend/executor/execMain.c
@@ -804,6 +804,10 @@ InitPlan(QueryDesc *queryDesc, int eflags)
if (rc->isParent)
continue;
+ /*
+ * If you change the conditions under which rel locks are acquired
+ * here, be sure to adjust ExecOpenScanRelation to match.
+ */
switch (rc->markType)
{
case ROW_MARK_EXCLUSIVE:
diff --git a/src/backend/executor/execUtils.c b/src/backend/executor/execUtils.c
index e4e70c41b63..65e4904875a 100644
--- a/src/backend/executor/execUtils.c
+++ b/src/backend/executor/execUtils.c
@@ -819,7 +819,9 @@ ExecOpenScanRelation(EState *estate, Index scanrelid)
{
ExecRowMark *erm = lfirst(l);
- if (erm->rti == scanrelid)
+ /* Keep this check in sync with InitPlan! */
+ if (erm->rti == scanrelid &&
+ erm->relation != NULL)
{
lockmode = NoLock;
break;