diff --git a/src/gausskernel/runtime/executor/nodeModifyTable.cpp b/src/gausskernel/runtime/executor/nodeModifyTable.cpp
index f6ef4ff8e..b3821d0a8 100644
--- a/src/gausskernel/runtime/executor/nodeModifyTable.cpp
+++ b/src/gausskernel/runtime/executor/nodeModifyTable.cpp
@@ -2212,14 +2212,6 @@ TupleTableSlot* ExecUpdate(ItemPointer tupleid,
         Assert(RELATION_HAS_BUCKET(result_relation_desc) == (bucketid != InvalidBktId));
 lreplace:
 
-        /*
-         * Compute stored generated columns
-         */
-        if (result_relation_desc->rd_att->constr && result_relation_desc->rd_att->constr->has_generated_stored) {
-            ExecComputeStoredGenerated(result_rel_info, estate, slot, tuple, CMD_UPDATE);
-            tuple = slot->tts_tuple;
-        }
-
         /* acquire Form_pg_attrdef ad_on_update */
         if (result_relation_desc->rd_att->constr && result_relation_desc->rd_att->constr->has_on_update) {
             bool update_fix_result =  ExecComputeStoredUpdateExpr(result_rel_info, estate, slot, tuple, CMD_UPDATE, tupleid, oldPartitionOid, bucketid);
@@ -2228,6 +2220,14 @@ lreplace:
             }
         }
 
+        /*
+         * Compute stored generated columns
+         */
+        if (result_relation_desc->rd_att->constr && result_relation_desc->rd_att->constr->has_generated_stored) {
+            ExecComputeStoredGenerated(result_rel_info, estate, slot, tuple, CMD_UPDATE);
+            tuple = slot->tts_tuple;
+        }
+
         if (result_relation_desc->rd_att->constr) {
             TupleTableSlot *tmp_slot = node->mt_update_constr_slot == NULL ? slot : node->mt_update_constr_slot;
             if (!ExecConstraints(result_rel_info, tmp_slot, estate)) {