diff --git a/src/client/inc/tscUtil.h b/src/client/inc/tscUtil.h
index a0c16f062d496932c01f8f6edc03f6d14fca2bb1..e0c073d153bba06ab62277817a3c069829d8023a 100644
--- a/src/client/inc/tscUtil.h
+++ b/src/client/inc/tscUtil.h
@@ -106,6 +106,8 @@ void tscAddSpecialColumnForSelect(SSqlCmd* pCmd, int32_t outputColIndex, int16_t
                                   SSchema* pColSchema, int16_t isTag);
 
 void addRequiredTagColumn(SSqlCmd* pCmd, int32_t tagColIndex, int32_t tableIndex);
+
+//TODO refactor, remove
 void SStringFree(SString* str);
 void SStringCopy(SString* pDest, const SString* pSrc);
 SString SStringCreate(const char* str);
diff --git a/src/client/src/tscLocal.c b/src/client/src/tscLocal.c
index d217d0958833fad40c2a2aaf7cb135e43222f56c..a18a98c8c176c8b08d1664d04ac86014f51aad3d 100644
--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -26,7 +26,7 @@
 #include "tschemautil.h"
 #include "tsocket.h"
 
-static int32_t getToStringLength(char *pData, int32_t length, int32_t type) {
+static int32_t getToStringLength(const char *pData, int32_t length, int32_t type) {
   char buf[512] = {0};
 
   int32_t len = 0;
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index fd23b183b1065e96ebb82b044219648b2be90e42..25564a75ea7c6cf362f9ac77c47521989a09287f 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -1643,7 +1643,7 @@ int32_t SStringEnsureRemain(SString* pStr, int32_t size) {
   }
 
   // remain space is insufficient, allocate more spaces
-  int32_t inc = (size < MIN_ALLOC_SIZE) ? size : MIN_ALLOC_SIZE;
+  int32_t inc = (size >= MIN_ALLOC_SIZE) ? size : MIN_ALLOC_SIZE;
   if (inc < (pStr->alloc >> 1)) {
     inc = (pStr->alloc >> 1);
   }
@@ -1670,6 +1670,7 @@ int32_t SStringEnsureRemain(SString* pStr, int32_t size) {
   }
 
   memset(tmp + pStr->n, 0, inc);
+  pStr->alloc = newsize;
   pStr->z = tmp;
 
   return TSDB_CODE_SUCCESS;
diff --git a/src/util/src/tnote.c b/src/util/src/tnote.c
index 68228d377a7d1f8d2da8aa0127752ad4c07622c0..709ac2742e5833a68194c8760cd65f45c27aebd4 100644
--- a/src/util/src/tnote.c
+++ b/src/util/src/tnote.c
@@ -13,22 +13,6 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
-#include <stdio.h>
-#include <string.h>
-#include <time.h>
-#include <stdlib.h>
-#include <errno.h>
-#include <sys/types.h>
-#include <stdarg.h>
-#include <ctype.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <fcntl.h>
-#include <pthread.h>
-#include <stdbool.h>
-#include <stdint.h>
-#include <semaphore.h>
-
 #include "os.h"
 #include "tutil.h"
 #include "tglobalcfg.h"