diff --git a/src/client/src/tscLocal.c b/src/client/src/tscLocal.c
index bb015bce3d..820572859e 100644
--- a/src/client/src/tscLocal.c
+++ b/src/client/src/tscLocal.c
@@ -892,7 +892,12 @@ int tscProcessLocalCmd(SSqlObj *pSql) {
   SSqlRes *pRes = &pSql->res;
 
   if (pCmd->command == TSDB_SQL_CFG_LOCAL) {
-    pRes->code = (uint8_t)taosCfgDynamicOptions(pCmd->payload);
+    if (taosCfgDynamicOptions(pCmd->payload)) {
+       pRes->code = TSDB_CODE_SUCCESS;
+    } else {
+       pRes->code = TSDB_CODE_COM_INVALID_CFG_MSG; 
+    } 
+    pRes->numOfRows = 0;
   } else if (pCmd->command == TSDB_SQL_DESCRIBE_TABLE) {
     pRes->code = (uint8_t)tscProcessDescribeTable(pSql);
   } else if (pCmd->command == TSDB_SQL_RETRIEVE_EMPTY_RESULT) {
diff --git a/src/client/src/tscSQLParser.c b/src/client/src/tscSQLParser.c
index 9e8c6bb163..3b248a6281 100644
--- a/src/client/src/tscSQLParser.c
+++ b/src/client/src/tscSQLParser.c
@@ -129,6 +129,7 @@ static int32_t doCheckForCreateFromStable(SSqlObj* pSql, SSqlInfo* pInfo);
 static int32_t doCheckForStream(SSqlObj* pSql, SSqlInfo* pInfo);
 static int32_t doCheckForQuery(SSqlObj* pSql, SQuerySQL* pQuerySql, int32_t index);
 static int32_t exprTreeFromSqlExpr(SSqlCmd* pCmd, tExprNode **pExpr, const tSQLExpr* pSqlExpr, SQueryInfo* pQueryInfo, SArray* pCols, int64_t *uid);
+static bool    validateDebugFlag(int32_t flag);
 
 int16_t getNewResColId(SQueryInfo* pQueryInfo) {
   return pQueryInfo->resColumnId--;
@@ -173,6 +174,16 @@ static uint8_t convertOptr(SStrToken *pToken) {
   }
 }
 
+static bool validateDebugFlag(int32_t v) {
+  const static int validFlag[] = {131, 135, 143};
+  
+  for (int i = 0; i < tListLen(validFlag); i++) {
+    if (v == validFlag[i]) {
+        return true;
+    } 
+  }
+  return false;
+}
 /*
  * Used during parsing query sql. Since the query sql usually small in length, error position
  * is not needed in the final error message.
@@ -565,16 +576,16 @@ int32_t tscToSQLCmd(SSqlObj* pSql, struct SSqlInfo* pInfo) {
       }
 
       int32_t numOfToken = (int32_t) taosArrayGetSize(pMiscInfo->a);
-      SStrToken* t = taosArrayGet(pMiscInfo->a, 0);
-      SStrToken* t1 = taosArrayGet(pMiscInfo->a, 1);
+      assert(numOfToken >= 1 && numOfToken <= 2);
 
+      SStrToken* t = taosArrayGet(pMiscInfo->a, 0);
       strncpy(pCmd->payload, t->z, t->n);
       if (numOfToken == 2) {
+        SStrToken* t1 = taosArrayGet(pMiscInfo->a, 1);
         pCmd->payload[t->n] = ' ';  // add sep
         strncpy(&pCmd->payload[t->n + 1], t1->z, t1->n);
-      }
-
-      break;
+      } 
+      return TSDB_CODE_SUCCESS; 
     }
 
     case TSDB_SQL_CREATE_TABLE: {
@@ -5357,13 +5368,15 @@ int32_t validateLocalConfig(SMiscInfo* pOptions) {
   SDNodeDynConfOption LOCAL_DYNAMIC_CFG_OPTIONS[6] = {{"resetLog", 8},    {"rpcDebugFlag", 12}, {"tmrDebugFlag", 12},
                                                       {"cDebugFlag", 10}, {"uDebugFlag", 10},   {"debugFlag", 9}};
 
+
   SStrToken* pOptionToken = taosArrayGet(pOptions->a, 0);
 
   if (numOfToken == 1) {
     // reset log does not need value
     for (int32_t i = 0; i < 1; ++i) {
       SDNodeDynConfOption* pOption = &LOCAL_DYNAMIC_CFG_OPTIONS[i];
-      if ((strncasecmp(pOption->name, pOptionToken->z, pOptionToken->n) == 0) && (pOption->len == pOptionToken->n)) {
+      if ((pOption->len == pOptionToken->n) && 
+              (strncasecmp(pOption->name, pOptionToken->z, pOptionToken->n) == 0)) {
         return TSDB_CODE_SUCCESS;
       }
     }
@@ -5371,15 +5384,14 @@ int32_t validateLocalConfig(SMiscInfo* pOptions) {
     SStrToken* pValToken = taosArrayGet(pOptions->a, 1);
 
     int32_t val = strtol(pValToken->z, NULL, 10);
-    if (val < 131 || val > 199) {
-      // options value is out of valid range
+    if (!validateDebugFlag(val)) {
       return TSDB_CODE_TSC_INVALID_SQL;
     }
 
     for (int32_t i = 1; i < tListLen(LOCAL_DYNAMIC_CFG_OPTIONS); ++i) {
       SDNodeDynConfOption* pOption = &LOCAL_DYNAMIC_CFG_OPTIONS[i];
-      if ((strncasecmp(pOption->name, pOptionToken->z, pOptionToken->n) == 0) && (pOption->len == pOptionToken->n)) {
-        // options is valid
+      if ((pOption->len == pOptionToken->n) 
+              && (strncasecmp(pOption->name, pOptionToken->z, pOptionToken->n) == 0)) {
         return TSDB_CODE_SUCCESS;
       }
     }
diff --git a/src/common/src/tglobal.c b/src/common/src/tglobal.c
index 3d88cf8312..fb6d745931 100644
--- a/src/common/src/tglobal.c
+++ b/src/common/src/tglobal.c
@@ -273,7 +273,7 @@ bool taosCfgDynamicOptions(char *msg) {
   int32_t   vint = 0;
 
   paGetToken(msg, &option, &olen);
-  if (olen == 0) return TSDB_CODE_COM_INVALID_CFG_MSG;
+  if (olen == 0) return false;;
 
   paGetToken(option + olen + 1, &value, &vlen);
   if (vlen == 0)
@@ -316,11 +316,9 @@ bool taosCfgDynamicOptions(char *msg) {
       }
       return true;
     }
-
     if (strncasecmp(cfg->option, "debugFlag", olen) == 0) {
-      taosSetAllDebugFlag();
+       taosSetAllDebugFlag(); 
     }
-    
     return true;
   }
 
diff --git a/src/query/src/qExecutor.c b/src/query/src/qExecutor.c
index 0e78289111..9b6d2b7791 100644
--- a/src/query/src/qExecutor.c
+++ b/src/query/src/qExecutor.c
@@ -4571,7 +4571,7 @@ static void generateBlockDistResult(STableBlockDist *pTableBlockDist) {
   if (pTableBlockDist == NULL) {
      return;
   }
-  int64_t min = INT64_MAX, max = INT64_MIN, avg = 0;    
+  int64_t min = 0, max = 0, avg = 0;    
   SArray* blockInfos= pTableBlockDist->dataBlockInfos;  
   int64_t totalRows = 0, totalBlocks = taosArrayGetSize(blockInfos); 
   for (size_t i = 0; i < taosArrayGetSize(blockInfos); i++) {