diff --git a/src/client/inc/tsclient.h b/src/client/inc/tsclient.h
index 6b5c65df85364092c1b9a18a5880beea600a3924..9cfeffb2d80996b99e81413f072e31f165db17c4 100644
--- a/src/client/inc/tsclient.h
+++ b/src/client/inc/tsclient.h
@@ -371,7 +371,6 @@ typedef struct SSqlObj {
   SSubqueryState   subState;
   struct SSqlObj **pSubs;
 
-  int global;
   struct SSqlObj  *prev, *next;
   int64_t self;
 } SSqlObj;
diff --git a/src/client/src/tscAsync.c b/src/client/src/tscAsync.c
index 99c03c65801a64eb6b913373603cfa9c48d36911..386a550884c761683eb92be07d2e9f8aace78167 100644
--- a/src/client/src/tscAsync.c
+++ b/src/client/src/tscAsync.c
@@ -480,6 +480,10 @@ void tscTableMetaCallBack(void *param, TAOS_RES *res, int code) {
           tscResetSqlCmdObj(pCmd, false);
 
           code = tsParseSql(pSql, true);
+          if (pCmd->command == TSDB_SQL_INSERT) {
+            pSql->fp = pSql->fetchFp;  // restore the fp
+          }
+
           if (code == TSDB_CODE_TSC_ACTION_IN_PROGRESS) {
             return;
           } else if (code != TSDB_CODE_SUCCESS) {
diff --git a/src/client/src/tscProfile.c b/src/client/src/tscProfile.c
index acc5acd786bfe00036e539a104da04af1485a263..18fc79c4748f84d4ec073e4bc678e3a067afb025 100644
--- a/src/client/src/tscProfile.c
+++ b/src/client/src/tscProfile.c
@@ -39,6 +39,7 @@ void tscInitConnCb(void *param, TAOS_RES *result, int code) {
     tscSlowQueryConnInitialized = true;
     tscSaveSlowQueryFp(sql, NULL);
   }
+  taos_free_result(result);
 }
 
 void tscAddIntoSqlList(SSqlObj *pSql) {
@@ -69,6 +70,7 @@ void tscSaveSlowQueryFpCb(void *param, TAOS_RES *result, int code) {
   } else {
     tscDebug("success to save slow query, code:%d", code);
   }
+  taos_free_result(result);
 }
 
 void tscSaveSlowQueryFp(void *handle, void *tmrId) {
diff --git a/src/client/src/tscSchemaUtil.c b/src/client/src/tscSchemaUtil.c
index 441ad8d8382c667c164f7c797fc344cb9ab9118d..746ae1d86d6604ffdb43a4b97616235651a65c87 100644
--- a/src/client/src/tscSchemaUtil.c
+++ b/src/client/src/tscSchemaUtil.c
@@ -154,6 +154,7 @@ STableMeta* tscCreateTableMetaFromMsg(STableMetaMsg* pTableMetaMsg, size_t* size
   assert(pTableMetaMsg != NULL);
   
   int32_t schemaSize = (pTableMetaMsg->numOfColumns + pTableMetaMsg->numOfTags) * sizeof(SSchema);
+  
   STableMeta* pTableMeta = calloc(1, sizeof(STableMeta) + schemaSize);
   pTableMeta->tableType = pTableMetaMsg->tableType;
   
diff --git a/src/client/src/tscSql.c b/src/client/src/tscSql.c
index 82788eec03ebaf6aa54ba19d8ce13cc237b74397..b6669cc9db4f8a0fc3793318af6600ee38c861c7 100644
--- a/src/client/src/tscSql.c
+++ b/src/client/src/tscSql.c
@@ -43,8 +43,6 @@ static bool validImpl(const char* str, size_t maxsize) {
   return true;
 }
 
-static int64_t queryIncr = 0;
-//static int64_t queryDec = 0; 
 
 static bool validUserName(const char* user) {
   return validImpl(user, TSDB_USER_LEN - 1);
@@ -354,9 +352,7 @@ TAOS_RES* taos_query_c(TAOS *taos, const char *sqlstr, uint32_t sqlLen, TAOS_RES
     return NULL;
   }
   
-  tscError("curre query count: %ld",atomic_add_fetch_64(&queryIncr, 1)); 
   tsem_init(&pSql->rspSem, 0, 0);
-  pSql->global = 100; 
   doAsyncQuery(pObj, pSql, waitForQueryRsp, taos, sqlstr, sqlLen);
 
   if (res != NULL) {
@@ -622,7 +618,7 @@ int taos_select_db(TAOS *taos, const char *db) {
 }
 
 // send free message to vnode to free qhandle and corresponding resources in vnode
-static UNUSED_FUNC bool tscKillQueryInDnode(SSqlObj* pSql) {
+static  bool tscKillQueryInDnode(SSqlObj* pSql) {
   SSqlCmd* pCmd = &pSql->cmd;
   SSqlRes* pRes = &pSql->res;
 
@@ -662,9 +658,6 @@ void taos_free_result(TAOS_RES *res) {
     tscError("%p already released sqlObj", res);
     return;
   }
-  if (100 == pSql->global) {
-    tscError("current query count: %ld", atomic_sub_fetch_64(&queryIncr, 1));
-  }
     
   bool freeNow = tscKillQueryInDnode(pSql);
   if (freeNow) {
diff --git a/src/client/src/tscUtil.c b/src/client/src/tscUtil.c
index e3f717046b9359aa59587398d13ce241e37a033a..ecf9cb24514ee8e64bd2562e6e328eab7048862e 100644
--- a/src/client/src/tscUtil.c
+++ b/src/client/src/tscUtil.c
@@ -750,14 +750,12 @@ int32_t tscMergeTableDataBlocks(SSqlObj* pSql, SArray* pTableDataBlockList) {
     dataBuf->size += (finalLen + sizeof(SSubmitBlk));
     assert(dataBuf->size <= dataBuf->nAllocSize);
 
-    //char* p = realloc(dataBuf->pData, dataBuf->size);
-    //if (p != NULL) {
-    //  dataBuf->pData = p; 
-    //}
     // the length does not include the SSubmitBlk structure
     pBlocks->dataLen = htonl(finalLen);
 
     dataBuf->numOfTables += 1;
+
+    tfree(pOneTableBlock->pData);
   }
 
   tscDestroyBlockArrayList(pTableDataBlockList);
@@ -811,13 +809,11 @@ int tscAllocPayload(SSqlCmd* pCmd, int size) {
     if (pCmd->payload == NULL) return TSDB_CODE_TSC_OUT_OF_MEMORY;
     pCmd->allocSize = size;
   } else {
-    if (pCmd->allocSize < (uint32_t)size) {
-      char* b = realloc(pCmd->payload, size);
-      if (b == NULL) return TSDB_CODE_TSC_OUT_OF_MEMORY;
-      pCmd->payload = b;
-      pCmd->allocSize = size;
+    pCmd->payload = realloc(pCmd->payload, size);
+    if  (pCmd->payload == NULL) {
+      return TSDB_CODE_TSC_OUT_OF_MEMORY;
     }
-    
+    pCmd->allocSize = size;
     memset(pCmd->payload, 0, pCmd->allocSize);
   }