diff --git a/src/sql/CMakeLists.txt b/src/sql/CMakeLists.txt
index 1c462831a..6ce2a4d6f 100644
--- a/src/sql/CMakeLists.txt
+++ b/src/sql/CMakeLists.txt
@@ -857,7 +857,6 @@ ob_set_subtarget(ob_sql ALONE
   engine/expr/vector_cast/vector_cast_compile/vector_cast_part4.cpp
   engine/expr/vector_cast/vector_cast_compile/vector_cast_part5.cpp
   engine/expr/vector_cast/vector_cast_compile/vector_cast_part6.cpp
-  engine/expr/vector_cast/vector_cast_compile/vector_cast_part7.cpp
   engine/expr/vector_cast/vector_cast_compile/vector_cast_all.cpp
   engine/expr/vector_cast/vector_cast.cpp
 )
diff --git a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_all.cpp b/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_all.cpp
index ef8851cd9..30c0264c3 100644
--- a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_all.cpp
+++ b/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_all.cpp
@@ -21,7 +21,6 @@ extern void __init_vec_cast_func3();
 extern void __init_vec_cast_func4();
 extern void __init_vec_cast_func5();
 extern void __init_vec_cast_func6();
-extern void __init_vec_cast_func7();
 
 int __init_all_vec_cast_funcs()
 {
@@ -32,7 +31,6 @@ int __init_all_vec_cast_funcs()
   __init_vec_cast_func4();
   __init_vec_cast_func5();
   __init_vec_cast_func6();
-  __init_vec_cast_func7();
   return 0;
 }
 } // end sq
diff --git a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_common.h b/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_common.h
index f1f0cc267..e74f2c770 100644
--- a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_common.h
+++ b/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_common.h
@@ -17,7 +17,7 @@ namespace oceanbase
 namespace sql
 {
 
-static const int COMPILATION_UNIT = 8;
+static const int COMPILATION_UNIT = 7;
 
 #define DEF_COMPILATION_VARS(name, max_val, unit_idx)                                              \
   constexpr int name##_unit_size =                                                                 \
diff --git a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_part7.cpp b/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_part7.cpp
deleted file mode 100644
index 7db09a609..000000000
--- a/src/sql/engine/expr/vector_cast/vector_cast_compile/vector_cast_part7.cpp
+++ /dev/null
@@ -1,21 +0,0 @@
-/**
- * Copyright (c) 2021 OceanBase
- * OceanBase CE is licensed under Mulan PubL v2.
- * You can use this software according to the terms and conditions of the Mulan PubL v2.
- * You may obtain a copy of Mulan PubL v2 at:
- *          http://license.coscl.org.cn/MulanPubL-2.0
- * THIS SOFTWARE IS PROVIDED ON AN "AS IS" BASIS, WITHOUT WARRANTIES OF ANY KIND,
- * EITHER EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO NON-INFRINGEMENT,
- * MERCHANTABILITY OR FIT FOR A PARTICULAR PURPOSE.
- * See the Mulan PubL v2 for more details.
- */
-
-#include "vector_cast_common.h"
-
-namespace oceanbase
-{
-namespace sql
-{
-DEF_COMPILE_FUNC_INIT(7);
-} // end sql
-} // end oceanbase
\ No newline at end of file