diff --git a/src/backend/distributed/deparser/ruleutils_14.c b/src/backend/distributed/deparser/ruleutils_14.c
index 071ed0722..2fe4b13b3 100644
--- a/src/backend/distributed/deparser/ruleutils_14.c
+++ b/src/backend/distributed/deparser/ruleutils_14.c
@@ -6171,35 +6171,14 @@ get_oper_expr(OpExpr *expr, deparse_context *context)
 	}
 	else
 	{
-		/* unary operator --- but which side? */
+		/* prefix operator */
 		Node	   *arg = (Node *) linitial(args);
-		HeapTuple	tp;
-		Form_pg_operator optup;
 
-		tp = SearchSysCache1(OPEROID, ObjectIdGetDatum(opno));
-		if (!HeapTupleIsValid(tp))
-			elog(ERROR, "cache lookup failed for operator %u", opno);
-		optup = (Form_pg_operator) GETSTRUCT(tp);
-		switch (optup->oprkind)
-		{
-			case 'l':
-				appendStringInfo(buf, "%s ",
-								 generate_operator_name(opno,
-														InvalidOid,
-														exprType(arg)));
-				get_rule_expr_paren(arg, context, true, (Node *) expr);
-				break;
-			case 'r':
-				get_rule_expr_paren(arg, context, true, (Node *) expr);
-				appendStringInfo(buf, " %s",
-								 generate_operator_name(opno,
-														exprType(arg),
-														InvalidOid));
-				break;
-			default:
-				elog(ERROR, "bogus oprkind: %d", optup->oprkind);
-		}
-		ReleaseSysCache(tp);
+		appendStringInfo(buf, "%s ",
+						 generate_operator_name(opno,
+												InvalidOid,
+												exprType(arg)));
+		get_rule_expr_paren(arg, context, true, (Node *) expr);
 	}
 	if (!PRETTY_PAREN(context))
 		appendStringInfoChar(buf, ')');