diff --git a/src/client/src/tscServer.c b/src/client/src/tscServer.c
index 111ebc4e8c690cef9c52ea214dacde0cf5d58dfd..8b896fb90e42006c1382a84535bd18d6374c7c65 100644
--- a/src/client/src/tscServer.c
+++ b/src/client/src/tscServer.c
@@ -1065,7 +1065,7 @@ int32_t tscBuildDropDnodeMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t tscBuildDropAcctMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
+int32_t tscBuildDropUserMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &pSql->cmd;
   pCmd->payloadLen = sizeof(SCMDropUserMsg);
   pCmd->msgType = TSDB_MSG_TYPE_CM_DROP_USER;
@@ -1082,6 +1082,23 @@ int32_t tscBuildDropAcctMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   return TSDB_CODE_SUCCESS;
 }
 
+int32_t tscBuildDropAcctMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
+  SSqlCmd *pCmd = &pSql->cmd;
+  pCmd->payloadLen = sizeof(SCMDropUserMsg);
+  pCmd->msgType = TSDB_MSG_TYPE_CM_DROP_ACCT;
+
+  if (TSDB_CODE_SUCCESS != tscAllocPayload(pCmd, pCmd->payloadLen)) {
+    tscError("%p failed to malloc for query msg", pSql);
+    return TSDB_CODE_CLI_OUT_OF_MEMORY;
+  }
+
+  SCMDropUserMsg *pDropMsg = (SCMDropUserMsg*)pCmd->payload;
+  STableMetaInfo *pTableMetaInfo = tscGetTableMetaInfoFromCmd(pCmd, pCmd->clauseIndex, 0);
+  strcpy(pDropMsg->user, pTableMetaInfo->name);
+
+  return TSDB_CODE_SUCCESS;
+}
+
 int32_t tscBuildUseDbMsg(SSqlObj *pSql, SSqlInfo *pInfo) {
   SSqlCmd *pCmd = &pSql->cmd;
   pCmd->payloadLen = sizeof(SCMUseDbMsg);
@@ -2550,7 +2567,7 @@ void tscInitMsgsFp() {
   tscBuildMsg[TSDB_SQL_ALTER_ACCT] = tscBuildAcctMsg;
 
   tscBuildMsg[TSDB_SQL_CREATE_TABLE] = tscBuildCreateTableMsg;
-  tscBuildMsg[TSDB_SQL_DROP_USER] = tscBuildDropAcctMsg;
+  tscBuildMsg[TSDB_SQL_DROP_USER] = tscBuildDropUserMsg;
   tscBuildMsg[TSDB_SQL_DROP_ACCT] = tscBuildDropAcctMsg;
   tscBuildMsg[TSDB_SQL_DROP_DB] = tscBuildDropDbMsg;
   tscBuildMsg[TSDB_SQL_DROP_TABLE] = tscBuildDropTableMsg;
diff --git a/src/mnode/src/mgmtDb.c b/src/mnode/src/mgmtDb.c
index 41e7a70276a9a8b62a36842774717be34258129e..5f28c30423780be1c12b6478757248ad7fd7bcae 100644
--- a/src/mnode/src/mgmtDb.c
+++ b/src/mnode/src/mgmtDb.c
@@ -903,9 +903,10 @@ static void mgmtProcessDropDbMsg(SQueuedMsg *pMsg) {
 void  mgmtDropAllDbs(SAcctObj *pAcct)  {
   int32_t numOfDbs = 0;
   SDbObj *pDb = NULL;
+  void *pNode = NULL;
 
   while (1) {
-    void *pNode = sdbFetchRow(tsDbSdb, pNode, (void **)&pDb);
+    pNode = sdbFetchRow(tsDbSdb, pNode, (void **)&pDb);
     if (pDb == NULL) break;
 
     if (pDb->pAcct == pAcct) {
@@ -914,5 +915,5 @@ void  mgmtDropAllDbs(SAcctObj *pAcct)  {
     }
   }
 
-  mTrace("acct:%s, all dbs is is set dirty", pAcct->acctId, numOfDbs);
+  mTrace("acct:%s, all dbs is is set dirty", pAcct->user, numOfDbs);
 }
\ No newline at end of file
diff --git a/src/mnode/src/mgmtUser.c b/src/mnode/src/mgmtUser.c
index f4a0b4d82b1a487298a0746d02a317915088836a..c497fd6e8fd9182c9790a9f4b9e4c3507e468b92 100644
--- a/src/mnode/src/mgmtUser.c
+++ b/src/mnode/src/mgmtUser.c
@@ -61,7 +61,9 @@ static int32_t mgmtUserActionDelete(SSdbOperDesc *pOper) {
   SUserObj *pUser = pOper->pObj;
   SAcctObj *pAcct = acctGetAcct(pUser->acct);
 
-  acctRemoveUser(pAcct, pUser);
+  if (pAcct != NULL) {
+    acctRemoveUser(pAcct, pUser);
+  }
 
   return TSDB_CODE_SUCCESS;
 }
@@ -448,7 +450,8 @@ static void mgmtProcessDropUserMsg(SQueuedMsg *pMsg) {
     return ;
   }
 
-  if (strcmp(pUser->user, "monitor") == 0 || (strcmp(pUser->user + 1, pUser->acct) == 0 && pUser->user[0] == '_')) {
+  if (strcmp(pUser->user, "monitor") == 0 || strcmp(pUser->user, pUser->acct) == 0 ||
+    (strcmp(pUser->user + 1, pUser->acct) == 0 && pUser->user[0] == '_')) {
     mgmtSendSimpleResp(pMsg->thandle, TSDB_CODE_NO_RIGHTS);
     return ;
   }
@@ -507,5 +510,5 @@ void  mgmtDropAllUsers(SAcctObj *pAcct)  {
     }
   }
 
-  mTrace("acct:%s, all users is dropped from sdb", pAcct->acctId, numOfUsers);
+  mTrace("acct:%s, all users:%d is dropped from sdb", pAcct->user, numOfUsers);
 }
\ No newline at end of file
diff --git a/tests/script/sh/exec_up.sh b/tests/script/sh/exec_up.sh
new file mode 100755
index 0000000000000000000000000000000000000000..ee4aabc175ee284596b11843f2bcd0ab9f38a8e8
--- /dev/null
+++ b/tests/script/sh/exec_up.sh
@@ -0,0 +1,109 @@
+#!/bin/sh
+
+# if [ $# != 4 || $# != 5 ]; then 
+  # echo "argument list need input : "
+  # echo "  -n nodeName"
+  # echo "  -s start/stop"
+  # echo "  -c clear"
+  # exit 1
+# fi
+
+NODE_NAME=
+EXEC_OPTON=
+CLEAR_OPTION="false"
+while getopts "n:s:u:x:ct" arg 
+do
+  case $arg in
+    n)
+      NODE_NAME=$OPTARG
+      ;;
+    s)
+      EXEC_OPTON=$OPTARG
+      ;;
+    c)
+      CLEAR_OPTION="clear"
+      ;;
+    t)
+      SHELL_OPTION="true"
+      ;;
+    u)
+      USERS=$OPTARG
+      ;;
+    x)
+      SIGNAL=$OPTARG
+      ;;
+    ?)
+      echo "unkown argument"
+      ;;
+  esac
+done
+
+SCRIPT_DIR=`dirname $0`
+cd $SCRIPT_DIR/../
+SCRIPT_DIR=`pwd`
+
+cd ../../
+TAOS_DIR=`pwd`
+
+BUILD_DIR=$TAOS_DIR/../debug/build
+SIM_DIR=$TAOS_DIR/sim
+NODE_DIR=$SIM_DIR/$NODE_NAME
+EXE_DIR=$BUILD_DIR/bin
+CFG_DIR=$NODE_DIR/cfg
+LOG_DIR=$NODE_DIR/log
+DATA_DIR=$NODE_DIR/data
+MGMT_DIR=$NODE_DIR/data/mgmt
+TSDB_DIR=$NODE_DIR/data/tsdb
+
+TAOS_CFG=$NODE_DIR/cfg/taos.cfg
+
+echo ------------ $EXEC_OPTON $NODE_NAME
+
+TAOS_FLAG=$SIM_DIR/tsim/flag
+if [ -f "$TAOS_FLAG" ]; then 
+  EXE_DIR=/usr/local/bin/taos
+fi
+
+if [ "$CLEAR_OPTION" = "clear" ]; then 
+  echo rm -rf $MGMT_DIR $TSDB_DIR  
+  rm -rf $TSDB_DIR
+  rm -rf $MGMT_DIR
+fi
+
+if [ "$SHELL_OPTION" = "true" ]; then 
+  if [ "$EXEC_OPTON" = "start" ]; then 
+    echo "ExcuteCmd:" $EXE_DIR/taos -c $CFG_DIR -u $USERS -p
+    $EXE_DIR/taos -c $CFG_DIR -u $USERS -p
+  else
+    #relative path
+    RCFG_DIR=sim/$NODE_NAME/cfg
+    PID=`ps -ef|grep -v taosd | grep taos | grep $RCFG_DIR | grep -v grep | awk '{print $2}'`
+    if [ -n "$PID" ]; then 
+      sudo kill -9 $PID
+    fi 
+  fi
+  return
+fi
+
+if [ "$EXEC_OPTON" = "start" ]; then 
+  echo "ExcuteCmd:" $EXE_DIR/taosd -c $CFG_DIR
+  nohup $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 & 
+  #TT=`date +%s`
+  #mkdir ${LOG_DIR}/${TT}
+  #echo valgrind --log-file=${LOG_DIR}/${TT}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR
+  #nohup valgrind --log-file=${LOG_DIR}/${TT}/valgrind.log --tool=memcheck --leak-check=full --show-reachable=no  --track-origins=yes --show-leak-kinds=all  -v  --workaround-gcc296-bugs=yes   $EXE_DIR/taosd -c $CFG_DIR > /dev/null 2>&1 & 
+  
+else
+  #relative path
+  RCFG_DIR=sim/$NODE_NAME/cfg
+  PID=`ps -ef|grep taosd | grep $RCFG_DIR | grep -v grep | awk '{print $2}'`
+  if [ -n "$PID" ]; then 
+    if [ "$SIGNAL" = "SIGINT" ]; then 
+      echo killed by signal
+      sudo kill -sigint $PID
+    else
+      sudo kill -9 $PID
+    fi
+  fi 
+fi
+
diff --git a/tests/script/unique/account/basic.sim b/tests/script/unique/account/basic.sim
new file mode 100644
index 0000000000000000000000000000000000000000..6f64975ac284d6e420a76a7fd4e356d1beee023f
--- /dev/null
+++ b/tests/script/unique/account/basic.sim
@@ -0,0 +1,45 @@
+system sh/stop_dnodes.sh
+system sh/deploy.sh -n dnode1 -m 192.168.0.1 -i 192.168.0.1
+system sh/exec_up.sh -n dnode1 -s start
+sql connect
+
+print =============== show accounts
+sql show accounts
+if $rows != 1 then 
+  return -1
+endi
+
+print $data00 $data01 $data02
+
+print =============== create account1
+sql create account account1 PASS 'account1'
+sql show accounts
+if $rows != 2 then 
+  return -1
+endi
+
+print $data00 $data01 $data02
+print $data10 $data11 $data22
+
+print =============== create account2
+sql create account account2 PASS 'account2'
+sql show accounts
+if $rows != 3 then 
+  return -1
+endi
+
+print $data00 $data01 $data02
+print $data10 $data11 $data22
+print $data20 $data11 $data22
+
+print =============== drop account1
+sql drop account account1
+sql show accounts
+if $rows != 2 then 
+  return -1
+endi
+
+print $data00 $data01 $data02
+print $data10 $data11 $data22
+
+  
diff --git a/tests/script/unique/testSuite.sim b/tests/script/unique/testSuite.sim
new file mode 100644
index 0000000000000000000000000000000000000000..1782f3ccd56b84641d1f90ba73252e6e4506f845
--- /dev/null
+++ b/tests/script/unique/testSuite.sim
@@ -0,0 +1,3 @@
+################################# 
+run unique/account/basic.sim
+##################################