diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 992d93f39b71550d2c1b60cb7984d45ed0c75128..f00e7bd5781ce8f04e3f67410e08f9b44f6b2d39 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -113,6 +113,13 @@ TAOS *taos_connect_internal(const char *ip, const char *user, const char *pass,
   return taosConnectImpl(ip, user, &secretEncrypt[0], db, port, NULL, NULL, *pInst);
 }
 
+static bool supportedQueryType(int32_t type) {
+  return (type == TSDB_MSG_TYPE_CREATE_USER || type == TSDB_MSG_TYPE_SHOW || type == TSDB_MSG_TYPE_DROP_USER ||
+          type == TSDB_MSG_TYPE_DROP_ACCT || type == TSDB_MSG_TYPE_CREATE_DB || type == TSDB_MSG_TYPE_CREATE_ACCT ||
+          type == TSDB_MSG_TYPE_CREATE_TABLE || type == TSDB_MSG_TYPE_CREATE_STB || type == TSDB_MSG_TYPE_USE_DB ||
+          type == TSDB_MSG_TYPE_DROP_DB || type == TSDB_MSG_TYPE_DROP_STB);
+}
+
 TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
   STscObj *pTscObj = (STscObj *)taos;
   if (sqlLen > (size_t) tsMaxSQLStringLen) {
@@ -145,16 +152,17 @@ TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
   tscDebugL("0x%"PRIx64" SQL: %s", pRequest->requestId, pRequest->sqlstr);
 
   SParseContext cxt = {
-    .ctx = {.requestId = pRequest->requestId, .acctId = pTscObj->acctId, .db = getConnectionDB(pTscObj)},
-    .pSql = pRequest->sqlstr,
+    .ctx    = {.requestId = pRequest->requestId, .acctId = pTscObj->acctId, .db = getConnectionDB(pTscObj)},
+    .pSql   = pRequest->sqlstr,
     .sqlLen = sqlLen,
-    .pMsg = pRequest->msgBuf,
+    .pMsg   = pRequest->msgBuf,
     .msgLen = ERROR_MSG_BUF_DEFAULT_SIZE
   };
+
   SQueryNode* pQuery = NULL;
   int32_t code = qParseQuerySql(&cxt, &pQuery);
   if (qIsDclQuery(pQuery)) {
-    SDclStmtInfo* pDcl = (SDclStmtInfo*)pQuery;
+    SDclStmtInfo* pDcl = (SDclStmtInfo*) pQuery;
     pRequest->type = pDcl->msgType;
     pRequest->body.requestMsg = (SReqMsgInfo){.pMsg = pDcl->pMsg, .len = pDcl->msgLen};
 
@@ -215,7 +223,7 @@ TAOS_RES *taos_query_l(TAOS *taos, const char *sql, int sqlLen) {
 int initEpSetFromCfg(const char *firstEp, const char *secondEp, SCorEpSet *pEpSet) {
   pEpSet->version = 0;
 
-  // init mgmt ip set
+  // init mnode ip set
   SEpSet *mgmtEpSet   = &(pEpSet->epSet);
   mgmtEpSet->numOfEps = 0;
   mgmtEpSet->inUse    = 0;
diff --git a/source/client/src/clientMsgHandler.c b/source/client/src/clientMsgHandler.c
index 2fc5e84bffe0f32ecaa86b6238ab2ba779167a9b..548ea3d725f3cb43fafc393d69fad3d48ca73a87 100644
--- a/source/client/src/clientMsgHandler.c
+++ b/source/client/src/clientMsgHandler.c
@@ -110,9 +110,9 @@ SRequestMsgBody buildRequestMsgImpl(SRequestObj *pRequest) {
     assert(pRequest != NULL);
     SRequestMsgBody body = {
         .requestObjRefId = pRequest->self,
-        .msgInfo = pRequest->body.requestMsg,
-        .msgType = pRequest->type,
-        .requestId = pRequest->requestId,
+        .msgInfo         = pRequest->body.requestMsg,
+        .msgType         = pRequest->type,
+        .requestId       = pRequest->requestId,
     };
     return body;
   }
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index 7a1e8ca0c3d19d1dc7913ded540f0454ea639b6a..2938d0180a958af8ace229e009e1b682e895abe4 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -49,101 +49,101 @@ int main(int argc, char** argv) {
 
 TEST(testCase, driverInit_Test) { taos_init(); }
 
-// TEST(testCase, connect_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
-////  assert(pConn != NULL);
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, create_user_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
-//  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "create user abc pass 'abc'");
-//  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
-//    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
-//  }
-//
-//  taos_free_result(pRes);
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, create_account_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+ TEST(testCase, connect_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
 //  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "create account aabc pass 'abc'");
-//  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
-//    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
-//  }
-//
-//  taos_free_result(pRes);
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, drop_account_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+  taos_close(pConn);
+}
+
+ TEST(testCase, create_user_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  TAOS_RES* pRes = taos_query(pConn, "create user abc pass 'abc'");
+  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
+    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
+  }
+
+  taos_free_result(pRes);
+  taos_close(pConn);
+}
+
+ TEST(testCase, create_account_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  TAOS_RES* pRes = taos_query(pConn, "create account aabc pass 'abc'");
+  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
+    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
+  }
+
+  taos_free_result(pRes);
+  taos_close(pConn);
+}
+
+ TEST(testCase, drop_account_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  TAOS_RES* pRes = taos_query(pConn, "drop account aabc");
+  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
+    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
+  }
+
+  taos_free_result(pRes);
+  taos_close(pConn);
+}
+
+ TEST(testCase, show_user_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
 //  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "drop account aabc");
-//  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
-//    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
-//  }
-//
-//  taos_free_result(pRes);
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, show_user_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
-////  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "show users");
-//  TAOS_ROW pRow = NULL;
-//
-//  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
-//  int32_t numOfFields = taos_num_fields(pRes);
-//
-//  char str[512] = {0};
-//  while((pRow = taos_fetch_row(pRes)) != NULL) {
-//    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
-//    printf("%s\n", str);
-//  }
-//
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, drop_user_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+
+  TAOS_RES* pRes = taos_query(pConn, "show users");
+  TAOS_ROW pRow = NULL;
+
+  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
+  int32_t numOfFields = taos_num_fields(pRes);
+
+  char str[512] = {0};
+  while((pRow = taos_fetch_row(pRes)) != NULL) {
+    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
+    printf("%s\n", str);
+  }
+
+  taos_close(pConn);
+}
+
+ TEST(testCase, drop_user_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  TAOS_RES* pRes = taos_query(pConn, "drop user abc");
+  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
+    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
+  }
+
+  taos_free_result(pRes);
+  taos_close(pConn);
+}
+
+ TEST(testCase, show_db_Test) {
+  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
 //  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "drop user abc");
-//  if (taos_errno(pRes) != TSDB_CODE_SUCCESS) {
-//    printf("failed to create user, reason:%s\n", taos_errstr(pRes));
-//  }
-//
-//  taos_free_result(pRes);
-//  taos_close(pConn);
-//}
-//
-// TEST(testCase, show_db_Test) {
-//  TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
-////  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "show databases");
-//  TAOS_ROW pRow = NULL;
-//
-//  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
-//  int32_t numOfFields = taos_num_fields(pRes);
-//
-//  char str[512] = {0};
-//  while((pRow = taos_fetch_row(pRes)) != NULL) {
-//    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
-//    printf("%s\n", str);
-//  }
-//
-//  taos_close(pConn);
-//}
+
+  TAOS_RES* pRes = taos_query(pConn, "show databases");
+  TAOS_ROW pRow = NULL;
+
+  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
+  int32_t numOfFields = taos_num_fields(pRes);
+
+  char str[512] = {0};
+  while((pRow = taos_fetch_row(pRes)) != NULL) {
+    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
+    printf("%s\n", str);
+  }
+
+  taos_close(pConn);
+}
 
 TEST(testCase, create_db_Test) {
   TAOS* pConn = taos_connect("ubuntu", "root", "taosdata", NULL, 0);
diff --git a/source/libs/parser/src/astValidate.c b/source/libs/parser/src/astValidate.c
index 5d64323332b220be624132bc61513a0db3e0f72d..cd11607326a33a8b277dbed0367138e269865b86 100644
--- a/source/libs/parser/src/astValidate.c
+++ b/source/libs/parser/src/astValidate.c
@@ -4457,8 +4457,6 @@ int32_t qParserValidateDclSqlNode(SSqlInfo* pInfo, SParseBasicCtx* pCtx, SDclStm
         return TSDB_CODE_TSC_INVALID_OPERATION;
       }
 
-      strncpy(pCreateMsg->db, token.z, token.n);
-
       pDcl->pMsg = (char*)pCreateMsg;
       pDcl->msgLen = sizeof(SCreateDbMsg);
       pDcl->msgType = (pInfo->type == TSDB_SQL_CREATE_DB)? TSDB_MSG_TYPE_CREATE_DB:TSDB_MSG_TYPE_ALTER_DB;