diff --git a/src/common/backend/catalog/storage_gtt.cpp b/src/common/backend/catalog/storage_gtt.cpp
index 544116ae0..17240b5bf 100644
--- a/src/common/backend/catalog/storage_gtt.cpp
+++ b/src/common/backend/catalog/storage_gtt.cpp
@@ -1317,7 +1317,7 @@ void init_gtt_storage(CmdType operation, ResultRelInfo* resultRelInfo)
                         "to enable this feature.")));
     }
 
-    if (!(operation == CMD_UTILITY || operation == CMD_INSERT)) {
+    if (!(operation == CMD_UTILITY || operation == CMD_INSERT || operation == CMD_MERGE)) {
         return;
     }
 
diff --git a/src/test/regress/input/gtt_merge.source b/src/test/regress/input/gtt_merge.source
new file mode 100644
index 000000000..afb3b807f
--- /dev/null
+++ b/src/test/regress/input/gtt_merge.source
@@ -0,0 +1,11 @@
+CREATE TABLE test_template ( A INT );
+INSERT INTO test_template VALUES( 1 );
+
+CREATE USER test_user WITH PASSWORD 'openGauss@123';
+GRANT ALL PRIVILEGES TO test_user;
+
+\! @abs_bindir@/gsql -r -U test_user -W openGauss@123 -p @portstring@ -d regression -c "CREATE GLOBAL TEMPORARY TABLE test_gt ( ID INT, NAME TEXT );"
+SELECT pg_sleep(1);
+\! @abs_bindir@/gsql -r -U test_user -W openGauss@123 -p @portstring@ -d regression -c "MERGE INTO test_gt USING test_template ON test_template.a >= 1 WHEN NOT MATCHED THEN INSERT VALUES ( 1, '1' ) WHEN MATCHED THEN UPDATE SET name = '1'; SELECT * FROM test_gt;"
+
+DROP USER test_user CASCADE;
diff --git a/src/test/regress/output/gtt_merge.source b/src/test/regress/output/gtt_merge.source
new file mode 100644
index 000000000..cf368b3ae
--- /dev/null
+++ b/src/test/regress/output/gtt_merge.source
@@ -0,0 +1,20 @@
+CREATE TABLE test_template ( A INT );
+INSERT INTO test_template VALUES( 1 );
+CREATE USER test_user WITH PASSWORD 'openGauss@123';
+GRANT ALL PRIVILEGES TO test_user;
+\! @abs_bindir@/gsql -r -U test_user -W openGauss@123 -p @portstring@ -d regression -c "CREATE GLOBAL TEMPORARY TABLE test_gt ( ID INT, NAME TEXT );"
+CREATE TABLE
+SELECT pg_sleep(1);
+ pg_sleep 
+----------
+ 
+(1 row)
+
+\! @abs_bindir@/gsql -r -U test_user -W openGauss@123 -p @portstring@ -d regression -c "MERGE INTO test_gt USING test_template ON test_template.a >= 1 WHEN NOT MATCHED THEN INSERT VALUES ( 1, '1' ) WHEN MATCHED THEN UPDATE SET name = '1'; SELECT * FROM test_gt;"
+MERGE 1
+ id | name 
+----+------
+  1 | 1
+(1 row)
+
+DROP USER test_user CASCADE;
diff --git a/src/test/regress/parallel_schedule0 b/src/test/regress/parallel_schedule0
index 9504097ab..854f32bc2 100644
--- a/src/test/regress/parallel_schedule0
+++ b/src/test/regress/parallel_schedule0
@@ -319,6 +319,7 @@ test: gtt_function
 test: gtt_prepare
 test: gtt_parallel_1 gtt_parallel_2
 test: gtt_clean
+test: gtt_merge
 
 #openGauss synchronization test cases
 test: partiton_pathkey_col_plan partiton_pathkey_col_randomexec partiton_pathkey_row_plan partiton_pathkey_row_randomexec