diff --git a/src/common/backend/catalog/heap.cpp b/src/common/backend/catalog/heap.cpp
index e7bec0ec01c45f5755e38f4d1493c265e33335ab..dedda7885c4bc98a834fbf2c02977db3304f15e9 100755
--- a/src/common/backend/catalog/heap.cpp
+++ b/src/common/backend/catalog/heap.cpp
@@ -2460,8 +2460,14 @@ void RemoveAttributeById(Oid relid, AttrNumber attnum)
 
     heap_close(attr_rel, RowExclusiveLock);
 
-    if (attnum > 0)
-        RemoveStatistics<'c'>(relid, attnum);
+    if (attnum > 0) {
+        if (RELATION_IS_GLOBAL_TEMP(rel)) {
+            remove_gtt_att_statistic(relid, attnum);
+        } else {
+            RemoveStatistics<'c'>(relid, attnum);
+        }
+    }
+
     /* decrease the relation's relnatts in pg_class */
     if (isRedisDropColumn) {
         pgclass = heap_open(RelationRelationId, RowExclusiveLock);
diff --git a/src/common/backend/catalog/storage_gtt.cpp b/src/common/backend/catalog/storage_gtt.cpp
index 83c2047319ba9db87447719be520b4695235f6d7..9fab21762ed0544c3b0ab269279e5e1704547850 100644
--- a/src/common/backend/catalog/storage_gtt.cpp
+++ b/src/common/backend/catalog/storage_gtt.cpp
@@ -709,6 +709,50 @@ bool get_gtt_relstats(Oid relid, BlockNumber* relpages, double* reltuples, Block
     return true;
 }
 
+void remove_gtt_att_statistic(Oid reloid, int attnum)
+{
+    gtt_local_hash_entry* entry = gtt_search_by_relid(reloid, true);
+    if (entry == NULL) {
+        return;
+    }
+    for (int i = 0; i < entry->natts; i++) {
+        if (entry->attnum[i] != attnum) {
+            continue;
+        }
+        Assert(entry->att_stat_tups[i]);
+        entry->attnum[i] = 0;
+        heap_freetuple(entry->att_stat_tups[i]);
+        entry->att_stat_tups[i] = NULL;
+        break;
+    }
+    return;
+}
+
+void extend_gtt_att_statistic(gtt_local_hash_entry* entry, int natts)
+{
+    Assert(entry != NULL);
+    Assert(entry->natts < natts);
+
+    MemoryContext oldContext = MemoryContextSwitchTo(u_sess->gtt_ctx.gtt_relstats_context);
+    int* attNum = (int*)palloc0(sizeof(int) * natts);
+    HeapTuple* attStatTups = (HeapTuple*)palloc0(sizeof(HeapTuple) * natts);
+    for (int i = 0; i < entry->natts; i++) {
+        if (entry->attnum[i] == 0) {
+            continue;
+        }
+        attNum[i] = entry->attnum[i];
+        attStatTups[i] = entry->att_stat_tups[i];
+    }
+    pfree(entry->attnum);
+    pfree(entry->att_stat_tups);
+
+    entry->natts = natts;
+    entry->attnum = attNum;
+    entry->att_stat_tups = attStatTups;
+    (void)MemoryContextSwitchTo(oldContext);
+    return;
+}
+
 /*
  * Update global temp table statistic info(definition is same as pg_statistic)
  * to local hashtable where ananyze global temp table
@@ -725,10 +769,8 @@ void up_gtt_att_statistic(Oid reloid, int attnum, int natts, TupleDesc tupleDesc
     entry = gtt_search_by_relid(reloid, true);
     if (entry == NULL)
         return;
-
     if (entry->natts < natts) {
-        elog(WARNING, "reloid %u not support update attstat after add colunm", reloid);
-        return;
+        extend_gtt_att_statistic(entry, natts);
     }
 
     oldcontext = MemoryContextSwitchTo(u_sess->gtt_ctx.gtt_relstats_context);
diff --git a/src/gausskernel/optimizer/commands/tablecmds.cpp b/src/gausskernel/optimizer/commands/tablecmds.cpp
index e545dfcb927a73578c001d7b25bed8b87dd2f613..01e5060f760f087be36aa023c3a96aef4ac67966 100644
--- a/src/gausskernel/optimizer/commands/tablecmds.cpp
+++ b/src/gausskernel/optimizer/commands/tablecmds.cpp
@@ -11115,7 +11115,11 @@ static void ATExecAlterColumnType(AlteredTableInfo* tab, Relation rel, AlterTabl
     /*
      * Drop any pg_statistic entry for the column, since it's now wrong type
      */
-    RemoveStatistics<'c'>(RelationGetRelid(rel), attnum);
+    if (RELATION_IS_GLOBAL_TEMP(rel)) {
+        remove_gtt_att_statistic(RelationGetRelid(rel), attnum);
+    } else {
+        RemoveStatistics<'c'>(RelationGetRelid(rel), attnum);
+    }
 
     /*
      * Update the default, if present, by brute force --- remove and re-add
diff --git a/src/include/catalog/storage_gtt.h b/src/include/catalog/storage_gtt.h
index 3ac692e86216de920de59d9e86cd17172ecc73e1..74079bdd8786525545cf346fe112a02648988048 100644
--- a/src/include/catalog/storage_gtt.h
+++ b/src/include/catalog/storage_gtt.h
@@ -44,4 +44,5 @@ extern void init_gtt_storage(CmdType operation, ResultRelInfo *resultRelInfo);
 extern Oid gtt_fetch_current_relfilenode(Oid relid);
 extern void gtt_switch_rel_relfilenode(Oid rel1, Oid relfilenode1, Oid rel2, Oid relfilenode2, bool footprint);
 extern void gtt_create_storage_files(Oid relid);
+extern void remove_gtt_att_statistic(Oid reloid, int attnum);
 #endif  /* STORAGE_GTT_H */
diff --git a/src/test/regress/expected/gtt_function.out b/src/test/regress/expected/gtt_function.out
index 2af1b5a3ebbc6ba6c05737518b3c53b3c254c5c4..a53fd63e4a62f53c25f1b599a5d832d7856c1b02 100644
--- a/src/test/regress/expected/gtt_function.out
+++ b/src/test/regress/expected/gtt_function.out
@@ -176,6 +176,71 @@ select * from gtt_test_new;
 
 --ok
 ALTER TABLE gtt_test_new DROP address;
+--gtt statistic test
+create global temp table gtt_statistic_test(id int);
+insert into gtt_statistic_test values (generate_series(1,1000));
+analyze gtt_statistic_test;
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+ attname | avg_width 
+---------+-----------
+ id      |         4
+(1 row)
+
+--add column
+alter table gtt_statistic_test add column text varchar(128);
+\d gtt_statistic_test
+   Table "gtt_function.gtt_statistic_test"
+ Column |          Type          | Modifiers 
+--------+------------------------+-----------
+ id     | integer                | 
+ text   | character varying(128) | 
+
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+ attname | avg_width 
+---------+-----------
+ id      |         4
+ text    |          
+(2 rows)
+
+insert into gtt_statistic_test values (generate_series(1,1000),'hello gtt');
+analyze gtt_statistic_test;
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+ attname | avg_width 
+---------+-----------
+ id      |         4
+ text    |        10
+(2 rows)
+
+--modify column
+alter table gtt_statistic_test modify id varchar(128);
+\d gtt_statistic_test
+   Table "gtt_function.gtt_statistic_test"
+ Column |          Type          | Modifiers 
+--------+------------------------+-----------
+ id     | character varying(128) | 
+ text   | character varying(128) | 
+
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+ attname | avg_width 
+---------+-----------
+ id      |          
+ text    |        10
+(2 rows)
+
+--drop column
+alter table gtt_statistic_test drop text;
+\d gtt_statistic_test
+   Table "gtt_function.gtt_statistic_test"
+ Column |          Type          | Modifiers 
+--------+------------------------+-----------
+ id     | character varying(128) | 
+
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+ attname | avg_width 
+---------+-----------
+ id      |          
+(1 row)
+
 CREATE global temp TABLE products (
     product_no integer PRIMARY KEY,
     name text,
@@ -382,7 +447,7 @@ create global temp table gtt_test11(c1 int) with(on_commit_delete_rows='');
 ERROR:  parameter "on_commit_delete_rows" requires a Boolean value
 reset search_path;
 drop schema gtt_function cascade;
-NOTICE:  drop cascades to 34 other objects
+NOTICE:  drop cascades to 35 other objects
 DETAIL:  drop cascades to table gtt_function.gtt1
 drop cascades to table gtt_function.gtt2
 drop cascades to table gtt_function.gtt3
@@ -398,6 +463,7 @@ drop cascades to table gtt_function.gtt7
 drop cascades to table gtt_function.gtt8
 drop cascades to table gtt_function.gtt9
 drop cascades to table gtt_function.gtt_test_new
+drop cascades to table gtt_function.gtt_statistic_test
 drop cascades to table gtt_function.products
 drop cascades to table gtt_function.orders
 drop cascades to table gtt_function.mytable
diff --git a/src/test/regress/sql/gtt_function.sql b/src/test/regress/sql/gtt_function.sql
index abe6052dacec51ae00f8efd0df74d287427d5063..339143003f3efb028b465b4c35aab1e3dfefa4b3 100644
--- a/src/test/regress/sql/gtt_function.sql
+++ b/src/test/regress/sql/gtt_function.sql
@@ -178,6 +178,30 @@ select * from gtt_test_new;
 --ok
 ALTER TABLE gtt_test_new DROP address;
 
+--gtt statistic test
+create global temp table gtt_statistic_test(id int);
+insert into gtt_statistic_test values (generate_series(1,1000));
+analyze gtt_statistic_test;
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+
+--add column
+alter table gtt_statistic_test add column text varchar(128);
+\d gtt_statistic_test
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+insert into gtt_statistic_test values (generate_series(1,1000),'hello gtt');
+analyze gtt_statistic_test;
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+
+--modify column
+alter table gtt_statistic_test modify id varchar(128);
+\d gtt_statistic_test
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+
+--drop column
+alter table gtt_statistic_test drop text;
+\d gtt_statistic_test
+select attname,avg_width from pg_gtt_stats where tablename='gtt_statistic_test';
+
 CREATE global temp TABLE products (
     product_no integer PRIMARY KEY,
     name text,