When modifying a foreign table, initialize tableoid field properly.

Failure to do this can cause AFTER ROW triggers or RETURNING expressions
that reference this field to misbehave.

Etsuro Fujita, reviewed by Thom Brown

diff --git a/src/backend/executor/nodeModifyTable.c b/src/backend/executor/nodeModifyTable.c
index 46299fc7619e64f42d99aeaa88639bef97cbdd5b..27051e80b087fdd568438f0b8388922c491bfccd 100644 (file)
--- a/src/backend/executor/nodeModifyTable.c
+++ b/src/backend/executor/nodeModifyTable.c
@@ -308,6 +308,12 @@ ExecInsert(ModifyTableState *mtstate,
                /* FDW might have changed tuple */
                tuple = ExecMaterializeSlot(slot);
 
+               /*
+                * AFTER ROW Triggers or RETURNING expressions might reference the
+                * tableoid column, so initialize t_tableOid before evaluating them.
+                */
+               tuple->t_tableOid = RelationGetRelid(resultRelationDesc);
+
                newId = InvalidOid;
        }
        else
@@ -561,6 +567,8 @@ ExecDelete(ItemPointer tupleid,
        }
        else if (resultRelInfo->ri_FdwRoutine)
        {
+               HeapTuple       tuple;
+
                /*
                 * delete from foreign table: let the FDW do it
                 *
@@ -579,6 +587,15 @@ ExecDelete(ItemPointer tupleid,
 
                if (slot == NULL)               /* "do nothing" */
                        return NULL;
+
+               /*
+                * RETURNING expressions might reference the tableoid column, so
+                * initialize t_tableOid before evaluating them.
+                */
+               if (slot->tts_isempty)
+                       ExecStoreAllNullTuple(slot);
+               tuple = ExecMaterializeSlot(slot);
+               tuple->t_tableOid = RelationGetRelid(resultRelationDesc);
        }
        else
        {
@@ -838,6 +855,12 @@ ExecUpdate(ItemPointer tupleid,
 
                /* FDW might have changed tuple */
                tuple = ExecMaterializeSlot(slot);
+
+               /*
+                * AFTER ROW Triggers or RETURNING expressions might reference the
+                * tableoid column, so initialize t_tableOid before evaluating them.
+                */
+               tuple->t_tableOid = RelationGetRelid(resultRelationDesc);
        }
        else
        {