diff --git a/be/src/exec/except_node.cpp b/be/src/exec/except_node.cpp
index 1411647b62dc53..237b9b2c89b3f3 100644
--- a/be/src/exec/except_node.cpp
+++ b/be/src/exec/except_node.cpp
@@ -56,16 +56,12 @@ Status ExceptNode::open(RuntimeState* state) {
                     new HashTable(_child_expr_lists[0], _child_expr_lists[i], _build_tuple_size,
                                   true, _find_nulls, id(), mem_tracker(), 1024));
             _hash_tbl_iterator = _hash_tbl->begin();
-            uint32_t previous_hash = -1;
             while (_hash_tbl_iterator.has_next()) {
-                if (previous_hash != _hash_tbl_iterator.get_hash()) {
-                    previous_hash = _hash_tbl_iterator.get_hash();
-                    if (!_hash_tbl_iterator.matched()) {
-                        VLOG_ROW << "rebuild row: "
-                                 << get_row_output_string(_hash_tbl_iterator.get_row(),
-                                                          child(0)->row_desc());
-                        temp_tbl->insert(_hash_tbl_iterator.get_row());
-                    }
+                if (!_hash_tbl_iterator.matched()) {
+                    VLOG_ROW << "rebuild row: "
+                             << get_row_output_string(_hash_tbl_iterator.get_row(),
+                                                      child(0)->row_desc());
+                    temp_tbl->insert(_hash_tbl_iterator.get_row());
                 }
                 _hash_tbl_iterator.next<false>();
             }