修复on update场景在sqlbypass下的问题

src/gausskernel/runtime/opfusion/opfusion_update.cpp

@@ -368,6 +368,7 @@ lreplace:
             ItemPointer tupleid = NULL;
             bool *temp_isnull = NULL;
             Datum *temp_values;
+            int temp_nvalid = m_local.m_reslot->tts_nvalid;
             relkind = result_rel_info->ri_RelationDesc->rd_rel->relkind;
             result_rel_info = result_rel_info + m_c_local.m_estate->result_rel_index;
             if (relkind == RELKIND_RELATION || RELKIND_IS_SEQUENCE(relkind)) {
@@ -392,6 +393,7 @@ lreplace:
             }
             m_local.m_reslot->tts_isnull = temp_isnull;
             m_local.m_reslot->tts_values = temp_values;
+            m_local.m_reslot->tts_nvalid = temp_nvalid;
         }
 
         if (rel->rd_att->constr) {

src/test/regress/expected/single_node_update.out

@@ -784,6 +784,20 @@ select * from bypass_pt_update order by a;
  9 | 2
 (8 rows)
 
+drop table bypass_pt_update;
+create table bypass_pt_update (a int primary key, c text, d timestamp(0) with time zone default current_timestamp(0) on update current_timestamp(0));
+NOTICE:  CREATE TABLE / PRIMARY KEY will create implicit index "bypass_pt_update_pkey" for table "bypass_pt_update"
+insert into bypass_pt_update select 1, 'sdawa';
+explain (costs off) update bypass_pt_update set c = 'sdawa' where a = 1;
+                            QUERY PLAN                            
+------------------------------------------------------------------
+ [Bypass]
+ Update on bypass_pt_update
+   ->  Index Scan using bypass_pt_update_pkey on bypass_pt_update
+         Index Cond: (a = 1)
+(4 rows)
+
+update bypass_pt_update set c = 'sdawa' where a = 1;
 drop table bypass_pt_update;
 set sql_beta_feature='a_style_coerce';
 set enable_partition_opfusion = off;

src/test/regress/sql/single_node_update.sql

@@ -328,6 +328,13 @@ update bypass_pt_update set a = 9 where a = 2;
 select * from bypass_pt_update order by a;
 
 drop table bypass_pt_update;
+
+create table bypass_pt_update (a int primary key, c text, d timestamp(0) with time zone default current_timestamp(0) on update current_timestamp(0));
+insert into bypass_pt_update select 1, 'sdawa';
+explain (costs off) update bypass_pt_update set c = 'sdawa' where a = 1;
+update bypass_pt_update set c = 'sdawa' where a = 1;
+drop table bypass_pt_update;
+
 set sql_beta_feature='a_style_coerce';
 set enable_partition_opfusion = off;
 set enable_opfusion = off;