diff --git a/src/backend/rewrite/rewriteHandler.c b/src/backend/rewrite/rewriteHandler.c
index 021c73f1..9a9cc82c 100644
--- a/src/backend/rewrite/rewriteHandler.c
+++ b/src/backend/rewrite/rewriteHandler.c
@@ -1769,6 +1769,18 @@ ApplyRetrieveRule(Query *parsetree,
 		 * Also note that there's a hack in fireRIRrules to avoid calling this
 		 * function again when it arrives at the copied RTE.
 		 */
+
+		/*
+		 * FOR PORTION OF requires access to the physical row to compute temporal leftovers.
+		 * Views with INSTEAD OF triggers have no physical storage.
+		 */
+		if (parsetree->forPortionOf)
+			ereport(ERROR,
+					(errcode(ERRCODE_FEATURE_NOT_SUPPORTED),
+					 errmsg("FOR PORTION OF is not supported on views with INSTEAD OF triggers")));
+
 		if (parsetree->commandType == CMD_INSERT)
 			return parsetree;
 		else if (parsetree->commandType == CMD_UPDATE ||