diff --git a/src/backend/parser/parse_utilcmd.c b/src/backend/parser/parse_utilcmd.c
index a37d1f18be..ee129ba18f 100644
--- a/src/backend/parser/parse_utilcmd.c
+++ b/src/backend/parser/parse_utilcmd.c
@@ -3750,8 +3750,16 @@ transformPartitionRangeBounds(ParseState *pstate, List *blist,
 				IsA(linitial(cref->fields), String))
 				cname = strVal(linitial(cref->fields));
 
-			Assert(cname != NULL);
-			if (strcmp("minvalue", cname) == 0)
+			if (cname == NULL)
+			{
+				/*
+				 * No field names have been found, meaning that there
+				 * is not much to do with special value handling.  Instead
+				 * let the expression transformation handle any errors and
+				 * limitations.
+				 */
+			}
+			else if (strcmp("minvalue", cname) == 0)
 			{
 				prd = makeNode(PartitionRangeDatum);
 				prd->kind = PARTITION_RANGE_DATUM_MINVALUE;