diff --git a/include/common/tmsg.h b/include/common/tmsg.h
index af5ca3def9..a090f6925c 100644
--- a/include/common/tmsg.h
+++ b/include/common/tmsg.h
@@ -135,7 +135,7 @@ typedef enum _mgmt_table {
 #define TSDB_ALTER_USER_CLEAR_READ_DB 0x5
 #define TSDB_ALTER_USER_ADD_WRITE_DB 0x6
 #define TSDB_ALTER_USER_REMOVE_WRITE_DB 0x7
-#define TSDB_ALTER_USER_CLEAR_WRITE_DB 0x7
+#define TSDB_ALTER_USER_CLEAR_WRITE_DB 0x8
 
 #define TSDB_ALTER_USER_PRIVILEGES 0x2
 
@@ -371,15 +371,32 @@ void*   tDeserializeSCreateUserReq(void* buf, SCreateUserReq* pReq);
 
 typedef struct {
   int8_t alterType;
+  int8_t superUser;
   char   user[TSDB_USER_LEN];
   char   pass[TSDB_PASSWORD_LEN];
   char   dbname[TSDB_DB_FNAME_LEN];
-  int8_t superUser;
 } SAlterUserReq;
 
 int32_t tSerializeSAlterUserReq(void** buf, SAlterUserReq* pReq);
 void*   tDeserializeSAlterUserReq(void* buf, SAlterUserReq* pReq);
 
+typedef struct {
+  char user[TSDB_USER_LEN];
+} SGetUserAuthReq;
+
+int32_t tSerializeSGetUserAuthReq(void** buf, SGetUserAuthReq* pReq);
+void*   tDeserializeSGetUserAuthReq(void* buf, SGetUserAuthReq* pReq);
+
+typedef struct {
+  char      user[TSDB_USER_LEN];
+  int8_t    superAuth;
+  SHashObj* readDbs;
+  SHashObj* writeDbs;
+} SGetUserAuthRsp;
+
+int32_t tSerializeSGetUserAuthRsp(void** buf, SGetUserAuthRsp* pReq);
+void*   tDeserializeSGetUserAuthRsp(void* buf, SGetUserAuthRsp* pReq);
+
 typedef struct {
   int16_t colId;     // column id
   int16_t colIndex;  // column index in colList if it is a normal column or index in tagColList if a tag
diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index f95fe8dd08..98d2b2c519 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -97,6 +97,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_MND_CREATE_USER, "mnode-create-user", NULL, NULL)	
   TD_DEF_MSG_TYPE(TDMT_MND_ALTER_USER, "mnode-alter-user", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_DROP_USER, "mnode-drop-user", NULL, NULL) 
+  TD_DEF_MSG_TYPE(TDMT_MND_GET_USER_AUTH, "mnode-get-user-auth", NULL, NULL) 
   TD_DEF_MSG_TYPE(TDMT_MND_CREATE_DNODE, "mnode-create-dnode", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_MND_CONFIG_DNODE, "mnode-config-dnode", NULL, NULL) 
   TD_DEF_MSG_TYPE(TDMT_MND_ALTER_DNODE, "mnode-alter-dnode", NULL, NULL)
diff --git a/source/common/src/tmsg.c b/source/common/src/tmsg.c
index 17120a6a5e..33add3eb6b 100644
--- a/source/common/src/tmsg.c
+++ b/source/common/src/tmsg.c
@@ -670,4 +670,72 @@ void *tDeserializeSAlterUserReq(void *buf, SAlterUserReq *pReq) {
   buf = taosDecodeStringTo(buf, pReq->dbname);
   buf = taosDecodeFixedI8(buf, &pReq->superUser);
   return buf;
-}
\ No newline at end of file
+}
+
+int32_t tSerializeSGetUserAuthReq(void **buf, SGetUserAuthReq *pReq) {
+  int32_t tlen = 0;
+  tlen += taosEncodeString(buf, pReq->user);
+  return tlen;
+}
+
+void *tDeserializeSGetUserAuthReq(void *buf, SGetUserAuthReq *pReq) {
+  buf = taosDecodeStringTo(buf, pReq->user);
+  return buf;
+}
+
+int32_t tSerializeSGetUserAuthRsp(void **buf, SGetUserAuthRsp *pReq) {
+  int32_t tlen = 0;
+  tlen += taosEncodeString(buf, pReq->user);
+  tlen += taosEncodeFixedI8(buf, pReq->superAuth);
+
+  int32_t numOfReadDbs = taosHashGetSize(pReq->readDbs);
+  int32_t numOfWriteDbs = taosHashGetSize(pReq->writeDbs);
+  tlen += taosEncodeFixedI32(buf, numOfReadDbs);
+  tlen += taosEncodeFixedI32(buf, numOfWriteDbs);
+
+  char *db = taosHashIterate(pReq->readDbs, NULL);
+  while (db != NULL) {
+    tlen += taosEncodeString(buf, db);
+    db = taosHashIterate(pReq->readDbs, db);
+  }
+
+  db = taosHashIterate(pReq->writeDbs, NULL);
+  while (db != NULL) {
+    tlen += taosEncodeString(buf, db);
+    db = taosHashIterate(pReq->writeDbs, db);
+  }
+
+  return tlen;
+}
+
+void *tDeserializeSGetUserAuthRsp(void *buf, SGetUserAuthRsp *pReq) {
+  buf = taosDecodeStringTo(buf, pReq->user);
+  buf = taosDecodeFixedI8(buf, &pReq->superAuth);
+
+  pReq->readDbs = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+  pReq->writeDbs = taosHashInit(4, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, false);
+  if (pReq->readDbs == NULL || pReq->writeDbs == NULL) {
+    return NULL;
+  }
+
+  int32_t numOfReadDbs = 0;
+  int32_t numOfWriteDbs = 0;
+  buf = taosDecodeFixedI32(buf, &numOfReadDbs);
+  buf = taosDecodeFixedI32(buf, &numOfWriteDbs);
+
+  for (int32_t i = 0; i < numOfReadDbs; ++i) {
+    char db[TSDB_DB_FNAME_LEN] = {0};
+    buf = taosDecodeStringTo(buf, db);
+    int32_t len = strlen(db) + 1;
+    taosHashPut(pReq->readDbs, db, len, db, len);
+  }
+
+  for (int32_t i = 0; i < numOfWriteDbs; ++i) {
+    char db[TSDB_DB_FNAME_LEN] = {0};
+    buf = taosDecodeStringTo(buf, db);
+    int32_t len = strlen(db) + 1;
+    taosHashPut(pReq->writeDbs, db, len, db, len);
+  }
+
+  return buf;
+}
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 257c72bff5..9b3ab40226 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -73,6 +73,7 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_CREATE_USER)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_ALTER_USER)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_DROP_USER)] = dndProcessMnodeWriteMsg;
+  pMgmt->msgFp[TMSG_INDEX(TDMT_MND_GET_USER_AUTH)] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_CREATE_DNODE)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_CONFIG_DNODE)] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TMSG_INDEX(TDMT_MND_DROP_DNODE)] = dndProcessMnodeWriteMsg;
diff --git a/source/dnode/mnode/impl/inc/mndAuth.h b/source/dnode/mnode/impl/inc/mndAuth.h
index b426ce23cf..c37ae7add5 100644
--- a/source/dnode/mnode/impl/inc/mndAuth.h
+++ b/source/dnode/mnode/impl/inc/mndAuth.h
@@ -25,6 +25,10 @@ extern "C" {
 int32_t mndInitAuth(SMnode *pMnode);
 void    mndCleanupAuth(SMnode *pMnode);
 
+int32_t mndCheckCreateUserAuth(SUserObj *pOperUser);
+int32_t mndCheckAlterUserAuth(SUserObj *pOperUser, SUserObj *pUser, SDbObj *pDb, SAlterUserReq *pAlter);
+int32_t mndCheckDropUserAuth(SUserObj *pOperUser);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index 7c346edbea..c4897a635c 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -261,7 +261,7 @@ typedef struct {
 typedef struct {
   char     name[TSDB_DB_FNAME_LEN];
   char     acct[TSDB_USER_LEN];
-  char     createdUser[TSDB_USER_LEN];
+  char     createUser[TSDB_USER_LEN];
   int64_t  createdTime;
   int64_t  updateTime;
   uint64_t uid;
diff --git a/source/dnode/mnode/impl/src/mndAuth.c b/source/dnode/mnode/impl/src/mndAuth.c
index 44a5836bd6..99b48adb85 100644
--- a/source/dnode/mnode/impl/src/mndAuth.c
+++ b/source/dnode/mnode/impl/src/mndAuth.c
@@ -56,4 +56,57 @@ static int32_t mndProcessAuthReq(SMnodeMsg *pReq) {
   int32_t code = mndRetriveAuth(pReq->pMnode, pAuth->user, &pRsp->spi, &pRsp->encrypt, pRsp->secret, pRsp->ckey);
   mTrace("user:%s, auth req received, spi:%d encrypt:%d ruser:%s", pReq->user, pAuth->spi, pAuth->encrypt, pAuth->user);
   return code;
+}
+
+int32_t mndCheckCreateUserAuth(SUserObj *pOperUser) {
+  if (pOperUser->superUser) {
+    return 0;
+  }
+
+  terrno = TSDB_CODE_MND_NO_RIGHTS;
+  return -1;
+}
+
+int32_t mndCheckAlterUserAuth(SUserObj *pOperUser, SUserObj *pUser, SDbObj *pDb, SAlterUserReq *pAlter) {
+  if (pAlter->alterType == TSDB_ALTER_USER_PASSWD) {
+    if (pOperUser->superUser || strcmp(pUser->user, pOperUser->user) == 0) {
+      return 0;
+    }
+  }
+
+  if (pAlter->alterType == TSDB_ALTER_USER_SUPERUSER) {
+    if (strcmp(pUser->user, TSDB_DEFAULT_USER) == 0) {
+      terrno = TSDB_CODE_MND_NO_RIGHTS;
+      return -1;
+    }
+
+    if (pOperUser->superUser) {
+      return 0;
+    }
+  }
+
+    if (pAlter->alterType == TSDB_ALTER_USER_CLEAR_WRITE_DB || pAlter->alterType == TSDB_ALTER_USER_CLEAR_READ_DB) {
+      if (pOperUser->superUser) {
+        return 0;
+      }
+    }
+
+  if (pAlter->alterType == TSDB_ALTER_USER_ADD_READ_DB || pAlter->alterType == TSDB_ALTER_USER_REMOVE_READ_DB ||
+      pAlter->alterType == TSDB_ALTER_USER_ADD_WRITE_DB || pAlter->alterType == TSDB_ALTER_USER_REMOVE_WRITE_DB) {
+    if (pOperUser->superUser || strcmp(pUser->user, pDb->createUser) == 0) {
+      return 0;
+    }
+  }
+
+  terrno = TSDB_CODE_MND_NO_RIGHTS;
+  return -1;
+}
+
+int32_t mndCheckDropUserAuth(SUserObj *pOperUser) {
+  if (pOperUser->superUser) {
+    return 0;
+  }
+
+  terrno = TSDB_CODE_MND_NO_RIGHTS;
+  return -1;
 }
\ No newline at end of file
diff --git a/source/dnode/mnode/impl/src/mndDb.c b/source/dnode/mnode/impl/src/mndDb.c
index 04c6c3dfa8..5ed3e9e8df 100644
--- a/source/dnode/mnode/impl/src/mndDb.c
+++ b/source/dnode/mnode/impl/src/mndDb.c
@@ -73,7 +73,7 @@ static SSdbRaw *mndDbActionEncode(SDbObj *pDb) {
   int32_t dataPos = 0;
   SDB_SET_BINARY(pRaw, dataPos, pDb->name, TSDB_DB_FNAME_LEN, DB_ENCODE_OVER)
   SDB_SET_BINARY(pRaw, dataPos, pDb->acct, TSDB_USER_LEN, DB_ENCODE_OVER)
-  SDB_SET_BINARY(pRaw, dataPos, pDb->createdUser, TSDB_USER_LEN, DB_ENCODE_OVER)
+  SDB_SET_BINARY(pRaw, dataPos, pDb->createUser, TSDB_USER_LEN, DB_ENCODE_OVER)
   SDB_SET_INT64(pRaw, dataPos, pDb->createdTime, DB_ENCODE_OVER)
   SDB_SET_INT64(pRaw, dataPos, pDb->updateTime, DB_ENCODE_OVER)
   SDB_SET_INT64(pRaw, dataPos, pDb->uid, DB_ENCODE_OVER)
@@ -134,7 +134,7 @@ static SSdbRow *mndDbActionDecode(SSdbRaw *pRaw) {
   int32_t dataPos = 0;
   SDB_GET_BINARY(pRaw, dataPos, pDb->name, TSDB_DB_FNAME_LEN, DB_DECODE_OVER)
   SDB_GET_BINARY(pRaw, dataPos, pDb->acct, TSDB_USER_LEN, DB_DECODE_OVER)
-  SDB_GET_BINARY(pRaw, dataPos, pDb->createdUser, TSDB_USER_LEN, DB_DECODE_OVER)
+  SDB_GET_BINARY(pRaw, dataPos, pDb->createUser, TSDB_USER_LEN, DB_DECODE_OVER)
   SDB_GET_INT64(pRaw, dataPos, &pDb->createdTime, DB_DECODE_OVER)
   SDB_GET_INT64(pRaw, dataPos, &pDb->updateTime, DB_DECODE_OVER)
   SDB_GET_INT64(pRaw, dataPos, &pDb->uid, DB_DECODE_OVER)
@@ -390,6 +390,7 @@ static int32_t mndCreateDb(SMnode *pMnode, SMnodeMsg *pReq, SCreateDbReq *pCreat
   dbObj.cfgVersion = 1;
   dbObj.vgVersion = 1;
   dbObj.hashMethod = 1;
+  memcpy(dbObj.createUser, pUser->user, TSDB_USER_LEN);
   dbObj.cfg = (SDbCfg){.numOfVgroups = pCreate->numOfVgroups,
                        .cacheBlockSize = pCreate->cacheBlockSize,
                        .totalBlocks = pCreate->totalBlocks,
diff --git a/source/dnode/mnode/impl/src/mndUser.c b/source/dnode/mnode/impl/src/mndUser.c
index 9703b73b1e..b54200f114 100644
--- a/source/dnode/mnode/impl/src/mndUser.c
+++ b/source/dnode/mnode/impl/src/mndUser.c
@@ -15,6 +15,7 @@
 
 #define _DEFAULT_SOURCE
 #include "mndUser.h"
+#include "mndAuth.h"
 #include "mndDb.h"
 #include "mndShow.h"
 #include "mndTrans.h"
@@ -29,10 +30,11 @@ static SSdbRow *mndUserActionDecode(SSdbRaw *pRaw);
 static int32_t  mndUserActionInsert(SSdb *pSdb, SUserObj *pUser);
 static int32_t  mndUserActionDelete(SSdb *pSdb, SUserObj *pUser);
 static int32_t  mndUserActionUpdate(SSdb *pSdb, SUserObj *pOld, SUserObj *pNew);
-static int32_t  mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass, SMnodeMsg *pReq);
+static int32_t  mndCreateUser(SMnode *pMnode, char *acct, SCreateUserReq *pCreate, SMnodeMsg *pReq);
 static int32_t  mndProcessCreateUserReq(SMnodeMsg *pReq);
 static int32_t  mndProcessAlterUserReq(SMnodeMsg *pReq);
 static int32_t  mndProcessDropUserReq(SMnodeMsg *pReq);
+static int32_t  mndProcessGetUserAuthReq(SMnodeMsg *pReq);
 static int32_t  mndGetUserMeta(SMnodeMsg *pReq, SShowObj *pShow, STableMetaRsp *pMeta);
 static int32_t  mndRetrieveUsers(SMnodeMsg *pReq, SShowObj *pShow, char *data, int32_t rows);
 static void     mndCancelGetNextUser(SMnode *pMnode, void *pIter);
@@ -50,6 +52,7 @@ int32_t mndInitUser(SMnode *pMnode) {
   mndSetMsgHandle(pMnode, TDMT_MND_CREATE_USER, mndProcessCreateUserReq);
   mndSetMsgHandle(pMnode, TDMT_MND_ALTER_USER, mndProcessAlterUserReq);
   mndSetMsgHandle(pMnode, TDMT_MND_DROP_USER, mndProcessDropUserReq);
+  mndSetMsgHandle(pMnode, TDMT_MND_GET_USER_AUTH, mndProcessGetUserAuthReq);
 
   mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_USER, mndGetUserMeta);
   mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_USER, mndRetrieveUsers);
@@ -96,7 +99,11 @@ static int32_t mndCreateDefaultUsers(SMnode *pMnode) {
 static SSdbRaw *mndUserActionEncode(SUserObj *pUser) {
   terrno = TSDB_CODE_OUT_OF_MEMORY;
 
-  SSdbRaw *pRaw = sdbAllocRaw(SDB_USER, TSDB_USER_VER_NUMBER, sizeof(SUserObj) + TSDB_USER_RESERVE_SIZE);
+  int32_t numOfReadDbs = taosHashGetSize(pUser->readDbs);
+  int32_t numOfWriteDbs = taosHashGetSize(pUser->writeDbs);
+  int32_t size = sizeof(SUserObj) + TSDB_USER_RESERVE_SIZE + (numOfReadDbs + numOfWriteDbs) * TSDB_DB_FNAME_LEN;
+
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_USER, TSDB_USER_VER_NUMBER, size);
   if (pRaw == NULL) goto USER_ENCODE_OVER;
 
   int32_t dataPos = 0;
@@ -106,9 +113,6 @@ static SSdbRaw *mndUserActionEncode(SUserObj *pUser) {
   SDB_SET_INT64(pRaw, dataPos, pUser->createdTime, USER_ENCODE_OVER)
   SDB_SET_INT64(pRaw, dataPos, pUser->updateTime, USER_ENCODE_OVER)
   SDB_SET_INT8(pRaw, dataPos, pUser->superUser, USER_ENCODE_OVER)
-
-  int32_t numOfReadDbs = taosHashGetSize(pUser->readDbs);
-  int32_t numOfWriteDbs = taosHashGetSize(pUser->writeDbs);
   SDB_SET_INT32(pRaw, dataPos, numOfReadDbs, USER_ENCODE_OVER)
   SDB_SET_INT32(pRaw, dataPos, numOfWriteDbs, USER_ENCODE_OVER)
 
@@ -257,21 +261,21 @@ void mndReleaseUser(SMnode *pMnode, SUserObj *pUser) {
   sdbRelease(pSdb, pUser);
 }
 
-static int32_t mndCreateUser(SMnode *pMnode, char *acct, char *user, char *pass, SMnodeMsg *pReq) {
+static int32_t mndCreateUser(SMnode *pMnode, char *acct, SCreateUserReq *pCreate, SMnodeMsg *pReq) {
   SUserObj userObj = {0};
-  taosEncryptPass_c((uint8_t *)pass, strlen(pass), userObj.pass);
-  tstrncpy(userObj.user, user, TSDB_USER_LEN);
+  taosEncryptPass_c((uint8_t *)pCreate->pass, strlen(pCreate->pass), userObj.pass);
+  tstrncpy(userObj.user, pCreate->user, TSDB_USER_LEN);
   tstrncpy(userObj.acct, acct, TSDB_USER_LEN);
   userObj.createdTime = taosGetTimestampMs();
   userObj.updateTime = userObj.createdTime;
-  userObj.superUser = 0;
+  userObj.superUser = pCreate->superUser;
 
   STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, &pReq->rpcMsg);
   if (pTrans == NULL) {
-    mError("user:%s, failed to create since %s", user, terrstr());
+    mError("user:%s, failed to create since %s", pCreate->user, terrstr());
     return -1;
   }
-  mDebug("trans:%d, used to create user:%s", pTrans->id, user);
+  mDebug("trans:%d, used to create user:%s", pTrans->id, pCreate->user);
 
   SSdbRaw *pRedoRaw = mndUserActionEncode(&userObj);
   if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
@@ -324,7 +328,11 @@ static int32_t mndProcessCreateUserReq(SMnodeMsg *pReq) {
     goto CREATE_USER_OVER;
   }
 
-  code = mndCreateUser(pMnode, pOperUser->acct, createReq.user, createReq.pass, pReq);
+  if (mndCheckCreateUserAuth(pOperUser) != 0) {
+    goto CREATE_USER_OVER;
+  }
+
+  code = mndCreateUser(pMnode, pOperUser->acct, &createReq, pReq);
   if (code == 0) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
 
 CREATE_USER_OVER:
@@ -391,6 +399,7 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
   int32_t       code = -1;
   SUserObj     *pUser = NULL;
   SUserObj     *pOperUser = NULL;
+  SUserObj      newUser = {0};
   SAlterUserReq alterReq = {0};
 
   if (tDeserializeSAlterUserReq(pReq->rpcMsg.pCont, &alterReq) == NULL) goto ALTER_USER_OVER;
@@ -419,7 +428,6 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
     goto ALTER_USER_OVER;
   }
 
-  SUserObj newUser = {0};
   memcpy(&newUser, pUser, sizeof(SUserObj));
   newUser.readDbs = mndDupDbHash(pUser->readDbs);
   newUser.writeDbs = mndDupDbHash(pUser->writeDbs);
@@ -435,9 +443,9 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
     char pass[TSDB_PASSWORD_LEN + 1] = {0};
     taosEncryptPass_c((uint8_t *)alterReq.pass, strlen(alterReq.pass), pass);
     memcpy(pUser->pass, pass, TSDB_PASSWORD_LEN);
-  } else if (alterReq.alterType == TSDB_ALTER_USER_SUPERUSER) { 
+  } else if (alterReq.alterType == TSDB_ALTER_USER_SUPERUSER) {
     newUser.superUser = alterReq.superUser;
-  } else if (alterReq.alterType == TSDB_ALTER_USER_ADD_READ_DB) { 
+  } else if (alterReq.alterType == TSDB_ALTER_USER_ADD_READ_DB) {
     if (pDb == NULL) {
       terrno = TSDB_CODE_MND_DB_NOT_EXIST;
       goto ALTER_USER_OVER;
@@ -446,12 +454,12 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
       terrno = TSDB_CODE_OUT_OF_MEMORY;
       goto ALTER_USER_OVER;
     }
-  } else if (alterReq.alterType == TSDB_ALTER_USER_REMOVE_READ_DB) { 
+  } else if (alterReq.alterType == TSDB_ALTER_USER_REMOVE_READ_DB) {
     if (taosHashRemove(newUser.readDbs, alterReq.dbname, len) != 0) {
       terrno = TSDB_CODE_MND_DB_NOT_EXIST;
       goto ALTER_USER_OVER;
     }
-  } else if (alterReq.alterType == TSDB_ALTER_USER_CLEAR_READ_DB) { 
+  } else if (alterReq.alterType == TSDB_ALTER_USER_CLEAR_READ_DB) {
     taosHashClear(newUser.readDbs);
   } else if (alterReq.alterType == TSDB_ALTER_USER_ADD_WRITE_DB) {
     if (pDb == NULL) {
@@ -467,7 +475,7 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
       terrno = TSDB_CODE_MND_DB_NOT_EXIST;
       goto ALTER_USER_OVER;
     }
-  } else if (alterReq.alterType == TSDB_ALTER_USER_CLEAR_WRITE_DB) { 
+  } else if (alterReq.alterType == TSDB_ALTER_USER_CLEAR_WRITE_DB) {
     taosHashClear(newUser.writeDbs);
   } else {
     terrno = TSDB_CODE_MND_INVALID_ALTER_OPER;
@@ -476,17 +484,22 @@ static int32_t mndProcessAlterUserReq(SMnodeMsg *pReq) {
 
   newUser.updateTime = taosGetTimestampMs();
 
+  if (mndCheckAlterUserAuth(pOperUser, pUser, pDb, &alterReq) != 0) {
+    goto ALTER_USER_OVER;
+  }
+
   code = mndUpdateUser(pMnode, pUser, &newUser, pReq);
   if (code == 0) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
 
 ALTER_USER_OVER:
-
   if (code != 0 && code != TSDB_CODE_MND_ACTION_IN_PROGRESS) {
     mError("user:%s, failed to alter since %s", alterReq.user, terrstr());
   }
 
   mndReleaseUser(pMnode, pOperUser);
   mndReleaseUser(pMnode, pUser);
+  taosHashCleanup(newUser.writeDbs);
+  taosHashCleanup(newUser.readDbs);
 
   return code;
 }
@@ -545,6 +558,10 @@ static int32_t mndProcessDropUserReq(SMnodeMsg *pReq) {
     goto DROP_USER_OVER;
   }
 
+  if (mndCheckDropUserAuth(pOperUser) != 0) {
+    goto DROP_USER_OVER;
+  }
+
   code = mndDropUser(pMnode, pReq, pUser);
   if (code == 0) code = TSDB_CODE_MND_ACTION_IN_PROGRESS;
 
@@ -559,6 +576,66 @@ DROP_USER_OVER:
   return code;
 }
 
+static int32_t mndProcessGetUserAuthReq(SMnodeMsg *pReq) {
+  SMnode         *pMnode = pReq->pMnode;
+  int32_t         code = -1;
+  SUserObj       *pUser = NULL;
+  SGetUserAuthReq authReq = {0};
+  SGetUserAuthRsp authRsp = {0};
+
+  if (tDeserializeSGetUserAuthReq(pReq->rpcMsg.pCont, &authReq) == NULL) goto GET_AUTH_OVER;
+
+  mTrace("user:%s, start to get auth", authReq.user);
+
+  pUser = mndAcquireUser(pMnode, authReq.user);
+  if (pUser == NULL) {
+    terrno = TSDB_CODE_MND_USER_NOT_EXIST;
+    goto GET_AUTH_OVER;
+  }
+
+  memcpy(authRsp.user, pUser->user, TSDB_USER_LEN);
+  authRsp.superAuth = pUser->superUser;
+  authRsp.readDbs = mndDupDbHash(pUser->readDbs);
+  authRsp.writeDbs = mndDupDbHash(pUser->writeDbs);
+
+  SSdb *pSdb = pMnode->pSdb;
+  void *pIter = NULL;
+  while (1) {
+    SDbObj *pDb = NULL;
+    pIter = sdbFetch(pSdb, SDB_DB, pIter, (void **)&pDb);
+    if (pIter == NULL) break;
+
+    if (strcmp(pDb->createUser, pUser->user) == 0) {
+      int32_t len = strlen(pDb->name) + 1;
+      taosHashPut(authRsp.readDbs, pDb->name, len, pDb->name, len);
+      taosHashPut(authRsp.writeDbs, pDb->name, len, pDb->name, len);
+    }
+
+    sdbRelease(pSdb, pDb);
+  }
+
+  int32_t contLen = tSerializeSGetUserAuthRsp(NULL, &authRsp);
+  void   *pRsp = rpcMallocCont(contLen);
+  if (pRsp == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    goto GET_AUTH_OVER;
+  }
+
+  void *pBuf = pRsp;
+  tSerializeSGetUserAuthRsp(&pBuf, &authRsp);
+
+  pReq->pCont = pRsp;
+  pReq->contLen = contLen;
+  code = 0;
+
+GET_AUTH_OVER:
+  mndReleaseUser(pMnode, pUser);
+  taosHashCleanup(authRsp.readDbs);
+  taosHashCleanup(authRsp.writeDbs);
+
+  return code;
+}
+
 static int32_t mndGetUserMeta(SMnodeMsg *pReq, SShowObj *pShow, STableMetaRsp *pMeta) {
   SMnode *pMnode = pReq->pMnode;
   SSdb   *pSdb = pMnode->pSdb;
@@ -653,4 +730,4 @@ static int32_t mndRetrieveUsers(SMnodeMsg *pReq, SShowObj *pShow, char *data, in
 static void mndCancelGetNextUser(SMnode *pMnode, void *pIter) {
   SSdb *pSdb = pMnode->pSdb;
   sdbCancelFetch(pSdb, pIter);
-}
\ No newline at end of file
+}
diff --git a/source/dnode/mnode/impl/test/user/user.cpp b/source/dnode/mnode/impl/test/user/user.cpp
index a86566a778..5d8c958f15 100644
--- a/source/dnode/mnode/impl/test/user/user.cpp
+++ b/source/dnode/mnode/impl/test/user/user.cpp
@@ -102,16 +102,108 @@ TEST_F(MndTestUser, 02_Create_User) {
     SRpcMsg* pRsp = test.SendReq(TDMT_MND_CREATE_USER, pReq, contLen);
     ASSERT_NE(pRsp, nullptr);
     ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 2);
+
+    CheckBinary("u1", TSDB_USER_LEN);
+    CheckBinary("root", TSDB_USER_LEN);
+    CheckBinary("normal", 10);
+    CheckBinary("super", 10);
+    CheckTimestamp();
+    CheckTimestamp();
+    CheckBinary("root", TSDB_USER_LEN);
+    CheckBinary("root", TSDB_USER_LEN);
   }
 
-  test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
-  CHECK_META("show users", 4);
+  {
+    SDropUserReq dropReq = {0};
+    strcpy(dropReq.user, "u1");
 
-  test.SendShowRetrieveReq();
-  EXPECT_EQ(test.GetShowRows(), 2);
+    int32_t contLen = tSerializeSDropUserReq(NULL, &dropReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSDropUserReq(&pBuf, &dropReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_DROP_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 1);
+  }
+
+  {
+    SCreateUserReq createReq = {0};
+    strcpy(createReq.user, "u2");
+    strcpy(createReq.pass, "p1");
+    createReq.superUser = 1;
+
+    int32_t contLen = tSerializeSCreateUserReq(NULL, &createReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSCreateUserReq(&pBuf, &createReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_CREATE_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 2);
+
+    CheckBinary("root", TSDB_USER_LEN);
+    CheckBinary("u2", TSDB_USER_LEN);
+    CheckBinary("super", 10);
+    CheckBinary("super", 10);
+    CheckTimestamp();
+    CheckTimestamp();
+    CheckBinary("root", TSDB_USER_LEN);
+    CheckBinary("root", TSDB_USER_LEN);
+  }
+
+  {
+    SDropUserReq dropReq = {0};
+    strcpy(dropReq.user, "u2");
+
+    int32_t contLen = tSerializeSDropUserReq(NULL, &dropReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSDropUserReq(&pBuf, &dropReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_DROP_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 1);
+  }
 }
 
 TEST_F(MndTestUser, 03_Alter_User) {
+  {
+    SCreateUserReq createReq = {0};
+    strcpy(createReq.user, "u3");
+    strcpy(createReq.pass, "p1");
+    createReq.superUser = 1;
+
+    int32_t contLen = tSerializeSCreateUserReq(NULL, &createReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSCreateUserReq(&pBuf, &createReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_CREATE_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 2);
+  }
+
   {
     SAlterUserReq alterReq = {0};
     alterReq.alterType = TSDB_ALTER_USER_PASSWD;
@@ -131,7 +223,7 @@ TEST_F(MndTestUser, 03_Alter_User) {
   {
     SAlterUserReq alterReq = {0};
     alterReq.alterType = TSDB_ALTER_USER_PASSWD;
-    strcpy(alterReq.user, "u1");
+    strcpy(alterReq.user, "u3");
     strcpy(alterReq.pass, "");
 
     int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
@@ -163,7 +255,7 @@ TEST_F(MndTestUser, 03_Alter_User) {
   {
     SAlterUserReq alterReq = {0};
     alterReq.alterType = TSDB_ALTER_USER_PASSWD;
-    strcpy(alterReq.user, "u1");
+    strcpy(alterReq.user, "u3");
     strcpy(alterReq.pass, "1");
 
     int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
@@ -175,9 +267,202 @@ TEST_F(MndTestUser, 03_Alter_User) {
     ASSERT_NE(pRsp, nullptr);
     ASSERT_EQ(pRsp->code, 0);
   }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_SUPERUSER;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+    alterReq.superUser = 1;
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_CLEAR_WRITE_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_CLEAR_READ_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_ADD_READ_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+    strcpy(alterReq.dbname, "d1");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, TSDB_CODE_MND_DB_NOT_EXIST);
+  }
+
+  {
+    int32_t contLen = sizeof(SCreateDbReq);
+
+    SCreateDbReq* pReq = (SCreateDbReq*)rpcMallocCont(contLen);
+    strcpy(pReq->db, "1.d2");
+    pReq->numOfVgroups = htonl(2);
+    pReq->cacheBlockSize = htonl(16);
+    pReq->totalBlocks = htonl(10);
+    pReq->daysPerFile = htonl(10);
+    pReq->daysToKeep0 = htonl(3650);
+    pReq->daysToKeep1 = htonl(3650);
+    pReq->daysToKeep2 = htonl(3650);
+    pReq->minRows = htonl(100);
+    pReq->maxRows = htonl(4096);
+    pReq->commitTime = htonl(3600);
+    pReq->fsyncPeriod = htonl(3000);
+    pReq->walLevel = 1;
+    pReq->precision = 0;
+    pReq->compression = 2;
+    pReq->replications = 1;
+    pReq->quorum = 1;
+    pReq->update = 0;
+    pReq->cacheLastRow = 0;
+    pReq->ignoreExist = 1;
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_CREATE_DB, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_ADD_READ_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+    strcpy(alterReq.dbname, "1.d2");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_ADD_READ_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+    strcpy(alterReq.dbname, "1.d2");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SGetUserAuthReq authReq = {0};
+    strcpy(authReq.user, "u3");
+    int32_t contLen = tSerializeSGetUserAuthReq(NULL, &authReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSGetUserAuthReq(&pBuf, &authReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_GET_USER_AUTH, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    SGetUserAuthRsp authRsp = {0};
+    tDeserializeSGetUserAuthRsp(pRsp->pCont, &authRsp);
+    EXPECT_STREQ(authRsp.user, "u3");
+    EXPECT_EQ(authRsp.superAuth, 1);
+    int32_t numOfReadDbs = taosHashGetSize(authRsp.readDbs);
+    int32_t numOfWriteDbs = taosHashGetSize(authRsp.writeDbs);
+    EXPECT_EQ(numOfReadDbs, 1);
+    EXPECT_EQ(numOfWriteDbs, 0);
+
+    char* dbname = (char*)taosHashGet(authRsp.readDbs, "1.d2", 5);
+    EXPECT_STREQ(dbname, "1.d2");
+
+    taosHashCleanup(authRsp.readDbs);
+    taosHashCleanup(authRsp.writeDbs);
+  }
+
+  {
+    SAlterUserReq alterReq = {0};
+    alterReq.alterType = TSDB_ALTER_USER_REMOVE_READ_DB;
+    strcpy(alterReq.user, "u3");
+    strcpy(alterReq.pass, "1");
+    strcpy(alterReq.dbname, "1.d2");
+
+    int32_t contLen = tSerializeSAlterUserReq(NULL, &alterReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSAlterUserReq(&pBuf, &alterReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_ALTER_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
+  {
+    SDropUserReq dropReq = {0};
+    strcpy(dropReq.user, "u3");
+
+    int32_t contLen = tSerializeSDropUserReq(NULL, &dropReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSDropUserReq(&pBuf, &dropReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_DROP_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+
+    test.SendShowMetaReq(TSDB_MGMT_TABLE_USER, "");
+    test.SendShowRetrieveReq();
+    EXPECT_EQ(test.GetShowRows(), 1);
+  }
 }
 
-TEST_F(MndTestUser, 04_Drop_User) {
+TEST_F(MndTestUser, 05_Drop_User) {
   {
     SDropUserReq dropReq = {0};
     strcpy(dropReq.user, "");
@@ -206,6 +491,21 @@ TEST_F(MndTestUser, 04_Drop_User) {
     ASSERT_EQ(pRsp->code, TSDB_CODE_MND_USER_NOT_EXIST);
   }
 
+  {
+    SCreateUserReq createReq = {0};
+    strcpy(createReq.user, "u1");
+    strcpy(createReq.pass, "p1");
+
+    int32_t contLen = tSerializeSCreateUserReq(NULL, &createReq);
+    void*   pReq = rpcMallocCont(contLen);
+    void*   pBuf = pReq;
+    tSerializeSCreateUserReq(&pBuf, &createReq);
+
+    SRpcMsg* pRsp = test.SendReq(TDMT_MND_CREATE_USER, pReq, contLen);
+    ASSERT_NE(pRsp, nullptr);
+    ASSERT_EQ(pRsp->code, 0);
+  }
+
   {
     SDropUserReq dropReq = {0};
     strcpy(dropReq.user, "u1");
@@ -227,7 +527,7 @@ TEST_F(MndTestUser, 04_Drop_User) {
   EXPECT_EQ(test.GetShowRows(), 1);
 }
 
-TEST_F(MndTestUser, 05_Create_Drop_Alter_User) {
+TEST_F(MndTestUser, 06_Create_Drop_Alter_User) {
   {
     SCreateUserReq createReq = {0};
     strcpy(createReq.user, "u1");