diff --git a/src/common/inc/texpr.h b/src/common/inc/texpr.h
index acfbffc01e400f8b111ee92b7651bb048c112bd2..9addea412b777e18390e7925f02dd2e09ad17a9b 100644
--- a/src/common/inc/texpr.h
+++ b/src/common/inc/texpr.h
@@ -89,9 +89,6 @@ void exprTreeToBinary(SBufferWriter* bw, tExprNode* pExprTree);
 
 bool exprTreeApplayFilter(tExprNode *pExpr, const void *pItem, SExprTraverseSupp *param);
 
-typedef void (*_arithmetic_operator_fn_t)(void *left, int32_t numLeft, int32_t leftType, void *right, int32_t numRight,
-                                          int32_t rightType, void *output, int32_t order);
-
 void arithmeticTreeTraverse(tExprNode *pExprs, int32_t numOfRows, char *pOutput, void *param, int32_t order,
                             char *(*cb)(void *, const char*, int32_t));
 
diff --git a/tests/pytest/table/column_name.py b/tests/pytest/table/column_name.py
index a180d3f752f36626c1c55adade24584a208dbe8d..0f24b98f3a9cd1d697c3972f5c8df5f49e82ca72 100644
--- a/tests/pytest/table/column_name.py
+++ b/tests/pytest/table/column_name.py
@@ -88,10 +88,9 @@ class TDTestCase:
         # TSIM:
         # TSIM: print =============== step4
         tdLog.info('=============== step4')
-        # TSIM: sql create table $tb (ts timestamp,
-        # a0123456789012345678901234567890123456789 int)
+        # TSIM: sql create table $tb (ts timestamp, a0123456789012345678901234567890123456789 int)
         getMaxColNum = "grep -w '#define TSDB_COL_NAME_LEN' ../../src/inc/taosdef.h|awk '{print $3}'"
-        boundary = int(subprocess.check_output(getMaxColNum, shell=True))
+        boundary = int(subprocess.check_output(getMaxColNum, shell=True)) - 1
         tdLog.info("get max column name length is %d" % boundary)
         chars = string.ascii_uppercase + string.ascii_lowercase