diff --git a/include/common/taosmsg.h b/include/common/taosmsg.h
index 2769f8bc7a..6b8d55c458 100644
--- a/include/common/taosmsg.h
+++ b/include/common/taosmsg.h
@@ -74,7 +74,7 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_TOPIC, "create-topic" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DROP_TOPIC, "drop-topic" )	  
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_TOPIC, "alter-topic" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_FUNCTION, "create-function" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_FUNCTION, "alter-function" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_RETRIEVE_FUNCTION, "retrieve-function" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_DROP_FUNCTION, "drop-function" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_STABLE, "create-stable" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_ALTER_STABLE, "alter-stable" )
@@ -86,7 +86,6 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_KILL_CONN, "kill-conn" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_HEARTBEAT, "heartbeat" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW, "show" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW_RETRIEVE, "retrieve" )  
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_SHOW_RETRIEVE_FUNC, "retrieve-func" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_COMPACT_VNODE, "compact-vnode" )
 // message from client to qnode
 // message from client to dnode
@@ -595,38 +594,45 @@ typedef struct {
 
 typedef struct {
   char    name[TSDB_FUNC_NAME_LEN];
-  char    path[PATH_MAX];
-  int32_t funcType;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
   int8_t  outputType;
-  int16_t outputLen;
+  int32_t outputLen;
   int32_t bufSize;
-  int32_t codeLen;
-  char    code[];
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char    pCont[];
 } SCreateFuncMsg;
 
 typedef struct {
-  int32_t num;
-  char    name[];
+  char name[TSDB_FUNC_NAME_LEN];
+} SDropFuncMsg;
+
+typedef struct {
+  int32_t numOfFuncs;
+  char    pFuncNames[];
 } SRetrieveFuncMsg;
 
 typedef struct {
   char    name[TSDB_FUNC_NAME_LEN];
-  int32_t funcType;
-  int8_t  resType;
-  int16_t resBytes;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
+  int8_t  outputType;
+  int32_t outputLen;
   int32_t bufSize;
-  int32_t len;
-  char    content[];
-} SFunctionInfoMsg;
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char    pCont[];
+} SFuncInfo;
 
 typedef struct {
-  int32_t num;
-  char    content[];
-} SUdfFuncMsg;
-
-typedef struct {
-  char     name[TSDB_FUNC_NAME_LEN];
-} SDropFuncMsg;
+  int32_t numOfFuncs;
+  char    pFuncInfos[];
+} SRetrieveFuncRsp;
 
 typedef struct {
   char   db[TSDB_TABLE_FNAME_LEN];
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index f6cefa96df..c0f7d8d328 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -200,12 +200,13 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_MND_INVALID_CREATE_TABLE_MSG  TAOS_DEF_ERROR_CODE(0, 0x036E)  //"Invalid create table message")
 #define TSDB_CODE_MND_EXCEED_MAX_ROW_BYTES      TAOS_DEF_ERROR_CODE(0, 0x036F)  //"Exceed max row bytes")
 
-#define TSDB_CODE_MND_INVALID_FUNC_NAME         TAOS_DEF_ERROR_CODE(0, 0x0370)  //"Invalid func name")
-#define TSDB_CODE_MND_INVALID_FUNC_LEN          TAOS_DEF_ERROR_CODE(0, 0x0371)  //"Invalid func length")
-#define TSDB_CODE_MND_INVALID_FUNC_CODE         TAOS_DEF_ERROR_CODE(0, 0x0372)  //"Invalid func code")
-#define TSDB_CODE_MND_FUNC_ALREADY_EXIST        TAOS_DEF_ERROR_CODE(0, 0x0373)  //"Func already exists")
-#define TSDB_CODE_MND_INVALID_FUNC              TAOS_DEF_ERROR_CODE(0, 0x0374)  //"Invalid func")
-#define TSDB_CODE_MND_INVALID_FUNC_BUFSIZE      TAOS_DEF_ERROR_CODE(0, 0x0375)  //"Invalid func bufSize")
+#define TSDB_CODE_MND_FUNC_ALREADY_EXIST        TAOS_DEF_ERROR_CODE(0, 0x0370)
+#define TSDB_CODE_MND_FUNC_NOT_EXIST            TAOS_DEF_ERROR_CODE(0, 0x0371)
+#define TSDB_CODE_MND_INVALID_FUNC              TAOS_DEF_ERROR_CODE(0, 0x0372)
+#define TSDB_CODE_MND_INVALID_FUNC_NAME         TAOS_DEF_ERROR_CODE(0, 0x0373)
+#define TSDB_CODE_MND_INVALID_FUNC_COMMENT      TAOS_DEF_ERROR_CODE(0, 0x0374)
+#define TSDB_CODE_MND_INVALID_FUNC_CODE         TAOS_DEF_ERROR_CODE(0, 0x0375)
+#define TSDB_CODE_MND_INVALID_FUNC_BUFSIZE      TAOS_DEF_ERROR_CODE(0, 0x0376)
 
 #define TSDB_CODE_MND_INVALID_TAG_LENGTH        TAOS_DEF_ERROR_CODE(0, 0x0376)  //"invalid tag length")
 #define TSDB_CODE_MND_INVALID_COLUMN_LENGTH     TAOS_DEF_ERROR_CODE(0, 0x0377)   //"invalid column length")
diff --git a/include/util/tdef.h b/include/util/tdef.h
index 897f51f5c1..165c27067c 100644
--- a/include/util/tdef.h
+++ b/include/util/tdef.h
@@ -163,9 +163,14 @@ do { \
 #define TSDB_TABLE_NAME_LEN       193     // it is a null-terminated string
 #define TSDB_DB_NAME_LEN          33
 #define TSDB_FULL_DB_NAME_LEN     (TSDB_ACCT_ID_LEN + TSDB_DB_NAME_LEN)
-#define TSDB_FUNC_NAME_LEN        65
-#define TSDB_FUNC_CODE_LEN        (65535 - 512)
-#define TSDB_FUNC_BUF_SIZE        512
+
+#define TSDB_FUNC_NAME_LEN         65
+#define TSDB_FUNC_COMMENT_LEN      4096
+#define TSDB_FUNC_CODE_LEN         (65535 - 512)
+#define TSDB_FUNC_BUF_SIZE         512
+#define TSDB_FUNC_TYPE_SCALAR      1
+#define TSDB_FUNC_TYPE_AGGREGATE   2
+
 #define TSDB_TYPE_STR_MAX_LEN     32
 #define TSDB_TABLE_FNAME_LEN      (TSDB_FULL_DB_NAME_LEN + TSDB_TABLE_NAME_LEN)
 #define TSDB_COL_NAME_LEN         65
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 98a0b8e308..8aadb97837 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -69,7 +69,7 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TSDB_MSG_TYPE_DROP_TOPIC] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_TOPIC] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_CREATE_FUNCTION] = dndProcessMnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_FUNCTION] = dndProcessMnodeWriteMsg;
+  pMgmt->msgFp[TSDB_MSG_TYPE_RETRIEVE_FUNCTION] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_DROP_FUNCTION] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_CREATE_STABLE] = dndProcessMnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_ALTER_STABLE] = dndProcessMnodeWriteMsg;
@@ -81,7 +81,6 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TSDB_MSG_TYPE_HEARTBEAT] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_SHOW] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_SHOW_RETRIEVE] = dndProcessMnodeReadMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_SHOW_RETRIEVE_FUNC] = dndProcessMnodeReadMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_COMPACT_VNODE] = dndProcessMnodeWriteMsg;
 
   // message from client to dnode
diff --git a/source/dnode/mnode/impl/inc/mndDef.h b/source/dnode/mnode/impl/inc/mndDef.h
index cb5c0c2755..00d9f31b15 100644
--- a/source/dnode/mnode/impl/inc/mndDef.h
+++ b/source/dnode/mnode/impl/inc/mndDef.h
@@ -271,16 +271,19 @@ typedef struct SSTableObj {
 
 typedef struct SFuncObj {
   char    name[TSDB_FUNC_NAME_LEN];
-  char    path[128];
-  int32_t contLen;
-  char    cont[TSDB_FUNC_CODE_LEN];
-  int32_t funcType;
-  int32_t bufSize;
   int64_t createdTime;
-  uint8_t resType;
-  int16_t resBytes;
-  int64_t sig;
-  int16_t type;
+  int8_t  funcType;
+  int8_t  scriptType;
+  int8_t  align;
+  int8_t  outputType;
+  int32_t outputLen;
+  int32_t bufSize;
+  int64_t sigature;
+  int32_t commentSize;
+  int32_t codeSize;
+  char   *pComment;
+  char   *pCode;
+  char    pData[];
 } SFuncObj;
 
 typedef struct SShowObj SShowObj;
diff --git a/source/dnode/mnode/impl/src/mndFunc.c b/source/dnode/mnode/impl/src/mndFunc.c
index d859da029f..ab2da8e0d5 100644
--- a/source/dnode/mnode/impl/src/mndFunc.c
+++ b/source/dnode/mnode/impl/src/mndFunc.c
@@ -14,8 +14,497 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "mndInt.h"
+#include "mndFunc.h"
+#include "mndShow.h"
+#include "mndSync.h"
+#include "mndTrans.h"
 
-int32_t mndInitFunc(SMnode *pMnode) { return 0; }
-void    mndCleanupFunc(SMnode *pMnode) {}
\ No newline at end of file
+#define SDB_FUNC_VER 1
+
+static SSdbRaw *mndFuncActionEncode(SFuncObj *pFunc);
+static SSdbRow *mndFuncActionDecode(SSdbRaw *pRaw);
+static int32_t  mndFuncActionInsert(SSdb *pSdb, SFuncObj *pFunc);
+static int32_t  mndFuncActionDelete(SSdb *pSdb, SFuncObj *pFunc);
+static int32_t  mndFuncActionUpdate(SSdb *pSdb, SFuncObj *pOldFunc, SFuncObj *pNewFunc);
+static int32_t  mndCreateFunc(SMnode *pMnode, SMnodeMsg *pMsg, SCreateFuncMsg *pCreate);
+static int32_t  mndDropFunc(SMnode *pMnode, SMnodeMsg *pMsg, SFuncObj *pFunc);
+static int32_t  mndProcessCreateFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessDropFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndProcessRetrieveFuncMsg(SMnodeMsg *pMsg);
+static int32_t  mndGetFuncMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta);
+static int32_t  mndRetrieveFuncs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows);
+static void     mndCancelGetNextFunc(SMnode *pMnode, void *pIter);
+
+int32_t mndInitFunc(SMnode *pMnode) {
+  SSdbTable table = {.sdbType = SDB_FUNC,
+                     .keyType = SDB_KEY_BINARY,
+                     .encodeFp = (SdbEncodeFp)mndFuncActionEncode,
+                     .decodeFp = (SdbDecodeFp)mndFuncActionDecode,
+                     .insertFp = (SdbInsertFp)mndFuncActionInsert,
+                     .updateFp = (SdbUpdateFp)mndFuncActionUpdate,
+                     .deleteFp = (SdbDeleteFp)mndFuncActionDelete};
+
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_CREATE_FUNCTION, mndProcessCreateFuncMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_DROP_FUNCTION, mndProcessDropFuncMsg);
+  mndSetMsgHandle(pMnode, TSDB_MSG_TYPE_RETRIEVE_FUNCTION, mndProcessRetrieveFuncMsg);
+
+  mndAddShowMetaHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndGetFuncMeta);
+  mndAddShowRetrieveHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndRetrieveFuncs);
+  mndAddShowFreeIterHandle(pMnode, TSDB_MGMT_TABLE_FUNCTION, mndCancelGetNextFunc);
+  return sdbSetTable(pMnode->pSdb, table);
+}
+
+void mndCleanupFunc(SMnode *pMnode) {}
+
+static SSdbRaw *mndFuncActionEncode(SFuncObj *pFunc) {
+  int32_t  size = pFunc->commentSize + pFunc->codeSize + sizeof(SFuncObj);
+  SSdbRaw *pRaw = sdbAllocRaw(SDB_FUNC, SDB_FUNC_VER, size);
+  if (pRaw == NULL) return NULL;
+
+  int32_t dataPos = 0;
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->name, TSDB_FUNC_NAME_LEN)
+  SDB_SET_INT64(pRaw, dataPos, pFunc->createdTime)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->funcType)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->scriptType)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->align)
+  SDB_SET_INT8(pRaw, dataPos, pFunc->outputType)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->outputLen)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->bufSize)
+  SDB_SET_INT64(pRaw, dataPos, pFunc->sigature)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->commentSize)
+  SDB_SET_INT32(pRaw, dataPos, pFunc->codeSize)
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->pComment, pFunc->commentSize)
+  SDB_SET_BINARY(pRaw, dataPos, pFunc->pCode, pFunc->codeSize)
+  SDB_SET_DATALEN(pRaw, dataPos);
+
+  return pRaw;
+}
+
+static SSdbRow *mndFuncActionDecode(SSdbRaw *pRaw) {
+  int8_t sver = 0;
+  if (sdbGetRawSoftVer(pRaw, &sver) != 0) return NULL;
+
+  if (sver != SDB_FUNC_VER) {
+    mError("failed to decode func since %s", terrstr());
+    terrno = TSDB_CODE_SDB_INVALID_DATA_VER;
+    return NULL;
+  }
+
+  int32_t   size = sizeof(SFuncObj) + TSDB_FUNC_COMMENT_LEN + TSDB_FUNC_CODE_LEN;
+  SSdbRow  *pRow = sdbAllocRow(size);
+  SFuncObj *pFunc = sdbGetRowObj(pRow);
+  if (pFunc == NULL) return NULL;
+  char *tmp = (char *)pFunc + sizeof(SFuncObj);
+
+  int32_t dataPos = 0;
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pFunc->name, TSDB_FUNC_NAME_LEN)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pFunc->createdTime)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->funcType)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->scriptType)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->align)
+  SDB_GET_INT8(pRaw, pRow, dataPos, &pFunc->outputType)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->outputLen)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->bufSize)
+  SDB_GET_INT64(pRaw, pRow, dataPos, &pFunc->sigature)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->commentSize)
+  SDB_GET_INT32(pRaw, pRow, dataPos, &pFunc->codeSize)
+  SDB_GET_BINARY(pRaw, pRow, dataPos, pFunc->pData, pFunc->commentSize + pFunc->codeSize)
+  pFunc->pComment = pFunc->pData;
+  pFunc->pCode = (pFunc->pData + pFunc->commentSize);
+
+  return pRow;
+}
+
+static int32_t mndFuncActionInsert(SSdb *pSdb, SFuncObj *pFunc) {
+  mTrace("func:%s, perform insert action", pFunc->name);
+  return 0;
+}
+
+static int32_t mndFuncActionDelete(SSdb *pSdb, SFuncObj *pFunc) {
+  mTrace("func:%s, perform delete action", pFunc->name);
+  return 0;
+}
+
+static int32_t mndFuncActionUpdate(SSdb *pSdb, SFuncObj *pOldFunc, SFuncObj *pNewFunc) {
+  mTrace("func:%s, perform update action", pOldFunc->name);
+  return 0;
+}
+
+static int32_t mndCreateFunc(SMnode *pMnode, SMnodeMsg *pMsg, SCreateFuncMsg *pCreate) {
+  SFuncObj *pFunc = calloc(1, sizeof(SFuncObj) + pCreate->commentSize + pCreate->codeSize);
+  pFunc->createdTime = taosGetTimestampMs();
+  pFunc->funcType = pCreate->funcType;
+  pFunc->scriptType = pCreate->scriptType;
+  pFunc->outputType = pCreate->outputType;
+  pFunc->outputLen = pCreate->outputLen;
+  pFunc->bufSize = pCreate->bufSize;
+  pFunc->sigature = pCreate->sigature;
+  pFunc->commentSize = pCreate->commentSize;
+  pFunc->codeSize = pCreate->codeSize;
+  pFunc->pComment = pFunc->pData;
+  memcpy(pFunc->pComment, pCreate->pCont, pCreate->commentSize);
+  pFunc->pCode = pFunc->pData + pCreate->commentSize;
+  memcpy(pFunc->pCode, pCreate->pCont + pCreate->commentSize, pFunc->codeSize);
+
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    free(pFunc);
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  mDebug("trans:%d, used to create func:%s", pTrans->id, pCreate->name);
+
+  SSdbRaw *pRedoRaw = mndFuncActionEncode(pFunc);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_CREATING);
+
+  SSdbRaw *pUndoRaw = mndFuncActionEncode(pFunc);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_DROPPED);
+
+  SSdbRaw *pCommitRaw = mndFuncActionEncode(pFunc);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    free(pFunc);
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_READY);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  free(pFunc);
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndDropFunc(SMnode *pMnode, SMnodeMsg *pMsg, SFuncObj *pFunc) {
+  STrans *pTrans = mndTransCreate(pMnode, TRN_POLICY_ROLLBACK, pMsg->rpcMsg.handle);
+  if (pTrans == NULL) {
+    mError("func:%s, failed to drop since %s", pFunc->name, terrstr());
+    return -1;
+  }
+  mDebug("trans:%d, used to drop user:%s", pTrans->id, pFunc->name);
+
+  SSdbRaw *pRedoRaw = mndFuncActionEncode(pFunc);
+  if (pRedoRaw == NULL || mndTransAppendRedolog(pTrans, pRedoRaw) != 0) {
+    mError("trans:%d, failed to append redo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pRedoRaw, SDB_STATUS_DROPPING);
+
+  SSdbRaw *pUndoRaw = mndFuncActionEncode(pFunc);
+  if (pUndoRaw == NULL || mndTransAppendUndolog(pTrans, pUndoRaw) != 0) {
+    mError("trans:%d, failed to append undo log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pUndoRaw, SDB_STATUS_READY);
+
+  SSdbRaw *pCommitRaw = mndFuncActionEncode(pFunc);
+  if (pCommitRaw == NULL || mndTransAppendCommitlog(pTrans, pCommitRaw) != 0) {
+    mError("trans:%d, failed to append commit log since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+  sdbSetRawStatus(pCommitRaw, SDB_STATUS_DROPPED);
+
+  if (mndTransPrepare(pTrans) != 0) {
+    mError("trans:%d, failed to prepare since %s", pTrans->id, terrstr());
+    mndTransDrop(pTrans);
+    return -1;
+  }
+
+  mndTransDrop(pTrans);
+  return 0;
+}
+
+static int32_t mndProcessCreateFuncMsg(SMnodeMsg *pMsg) {
+  SMnode *pMnode = pMsg->pMnode;
+
+  SCreateFuncMsg *pCreate = pMsg->rpcMsg.pCont;
+  pCreate->outputLen = htonl(pCreate->outputLen);
+  pCreate->bufSize = htonl(pCreate->bufSize);
+  pCreate->sigature = htobe64(pCreate->sigature);
+  pCreate->commentSize = htonl(pCreate->commentSize);
+  pCreate->codeSize = htonl(pCreate->codeSize);
+
+  mDebug("func:%s, start to create", pCreate->name);
+
+  SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, pCreate->name);
+  if (pFunc != NULL) {
+    sdbRelease(pMnode->pSdb, pFunc);
+    terrno = TSDB_CODE_MND_FUNC_ALREADY_EXIST;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->name[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_NAME;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->commentSize <= 0 || pCreate->commentSize > TSDB_FUNC_COMMENT_LEN) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_COMMENT;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->codeSize <= 0 || pCreate->codeSize > TSDB_FUNC_CODE_LEN) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_CODE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->pCont[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_CODE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  if (pCreate->bufSize < 0 || pCreate->bufSize > TSDB_FUNC_BUF_SIZE) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_BUFSIZE;
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndCreateFunc(pMnode, pMsg, pCreate);
+
+  if (code != 0) {
+    mError("func:%s, failed to create since %s", pCreate->name, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessDropFuncMsg(SMnodeMsg *pMsg) {
+  SMnode       *pMnode = pMsg->pMnode;
+  SDropFuncMsg *pDrop = pMsg->rpcMsg.pCont;
+
+  mDebug("func:%s, start to drop", pDrop->name);
+
+  if (pDrop->name[0] == 0) {
+    terrno = TSDB_CODE_MND_INVALID_FUNC_NAME;
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, pDrop->name);
+  if (pFunc == NULL) {
+    terrno = TSDB_CODE_MND_FUNC_NOT_EXIST;
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  int32_t code = mndDropFunc(pMnode, pMsg, pFunc);
+
+  if (code != 0) {
+    mError("func:%s, failed to drop since %s", pDrop->name, terrstr());
+    return -1;
+  }
+
+  return TSDB_CODE_MND_ACTION_IN_PROGRESS;
+}
+
+static int32_t mndProcessRetrieveFuncMsg(SMnodeMsg *pMsg) {
+  SMnode *pMnode = pMsg->pMnode;
+
+  SRetrieveFuncMsg *pRetrieve = pMsg->rpcMsg.pCont;
+  pRetrieve->numOfFuncs = htonl(pRetrieve->numOfFuncs);
+
+  int32_t size = sizeof(SRetrieveFuncRsp) + (sizeof(SFuncInfo) + TSDB_FUNC_CODE_LEN) * pRetrieve->numOfFuncs + 16384;
+
+  SRetrieveFuncRsp *pRetrieveRsp = rpcMallocCont(size);
+  pRetrieveRsp->numOfFuncs = htonl(pRetrieve->numOfFuncs);
+  char *pOutput = pRetrieveRsp->pFuncInfos;
+
+  for (int32_t i = 0; i < pRetrieve->numOfFuncs; ++i) {
+    char funcName[TSDB_FUNC_NAME_LEN] = {0};
+    memcpy(funcName, pRetrieve->pFuncNames + i * TSDB_FUNC_NAME_LEN, TSDB_FUNC_NAME_LEN);
+
+    SFuncObj *pFunc = sdbAcquire(pMnode->pSdb, SDB_FUNC, funcName);
+    if (pFunc == NULL) {
+      terrno = TSDB_CODE_MND_INVALID_FUNC;
+      mError("func:%s, failed to retrieve since %s", funcName, terrstr());
+      return -1;
+    }
+
+    SFuncInfo *pFuncInfo = (SFuncInfo *)pOutput;
+
+    strncpy(pFuncInfo->name, pFunc->name, TSDB_FUNC_NAME_LEN);
+    pFuncInfo->funcType = pFunc->funcType;
+    pFuncInfo->scriptType = pFunc->scriptType;
+    pFuncInfo->outputType = pFunc->outputType;
+    pFuncInfo->outputLen = htonl(pFunc->outputLen);
+    pFuncInfo->bufSize = htonl(pFunc->bufSize);
+    pFuncInfo->sigature = htobe64(pFunc->sigature);
+    pFuncInfo->commentSize = htonl(pFunc->commentSize);
+    pFuncInfo->codeSize = htonl(pFunc->codeSize);
+    memcpy(pFuncInfo->pCont, pFunc->pCode, pFunc->commentSize + pFunc->codeSize);
+
+    pOutput += sizeof(SFuncInfo) + pFunc->commentSize + pFunc->codeSize;
+  }
+
+  pMsg->pCont = pRetrieveRsp;
+  pMsg->contLen = (int32_t)(pOutput - (char *)pRetrieveRsp);
+
+  return 0;
+}
+
+static int32_t mndGetFuncMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *pMeta) {
+  SMnode *pMnode = pMsg->pMnode;
+  SSdb   *pSdb = pMnode->pSdb;
+
+  int32_t  cols = 0;
+  SSchema *pSchema = pMeta->schema;
+
+  pShow->bytes[cols] = TSDB_FUNC_NAME_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "name");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = PATH_MAX + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "comment");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "aggregate");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = TSDB_TYPE_STR_MAX_LEN + VARSTR_HEADER_SIZE;
+  pSchema[cols].type = TSDB_DATA_TYPE_BINARY;
+  strcpy(pSchema[cols].name, "outputtype");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 8;
+  pSchema[cols].type = TSDB_DATA_TYPE_TIMESTAMP;
+  strcpy(pSchema[cols].name, "create_time");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "code_len");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pShow->bytes[cols] = 4;
+  pSchema[cols].type = TSDB_DATA_TYPE_INT;
+  strcpy(pSchema[cols].name, "bufsize");
+  pSchema[cols].bytes = htons(pShow->bytes[cols]);
+  cols++;
+
+  pMeta->numOfColumns = htons(cols);
+  pShow->numOfColumns = cols;
+
+  pShow->offset[0] = 0;
+  for (int32_t i = 1; i < cols; ++i) {
+    pShow->offset[i] = pShow->offset[i - 1] + pShow->bytes[i - 1];
+  }
+
+  pShow->numOfRows = sdbGetSize(pSdb, SDB_FUNC);
+  pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, "show funcs");
+
+  return 0;
+}
+
+static void *mnodeGenTypeStr(char *buf, int32_t buflen, uint8_t type, int16_t len) {
+  char *msg = "unknown";
+  if (type >= sizeof(tDataTypes) / sizeof(tDataTypes[0])) {
+    return msg;
+  }
+
+  if (type == TSDB_DATA_TYPE_NCHAR || type == TSDB_DATA_TYPE_BINARY) {
+    int32_t bytes = len > 0 ? (int)(len - VARSTR_HEADER_SIZE) : len;
+
+    snprintf(buf, buflen - 1, "%s(%d)", tDataTypes[type].name, type == TSDB_DATA_TYPE_NCHAR ? bytes / 4 : bytes);
+    buf[buflen - 1] = 0;
+
+    return buf;
+  }
+
+  return tDataTypes[type].name;
+}
+
+static int32_t mndRetrieveFuncs(SMnodeMsg *pMsg, SShowObj *pShow, char *data, int32_t rows) {
+  SMnode   *pMnode = pMsg->pMnode;
+  SSdb     *pSdb = pMnode->pSdb;
+  int32_t   numOfRows = 0;
+  SFuncObj *pFunc = NULL;
+  int32_t   cols = 0;
+  char     *pWrite;
+  char      buf[TSDB_TYPE_STR_MAX_LEN];
+
+  while (numOfRows < rows) {
+    pShow->pIter = sdbFetch(pSdb, SDB_FUNC, pShow->pIter, (void **)&pFunc);
+    if (pShow->pIter == NULL) break;
+
+    cols = 0;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pFunc->name, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, pFunc->pComment, pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->funcType == TSDB_FUNC_TYPE_AGGREGATE ? 1 : 0;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    STR_WITH_MAXSIZE_TO_VARSTR(pWrite, mnodeGenTypeStr(buf, TSDB_TYPE_STR_MAX_LEN, pFunc->outputType, pFunc->outputLen),
+                               pShow->bytes[cols]);
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int64_t *)pWrite = pFunc->createdTime;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->codeSize;
+    cols++;
+
+    pWrite = data + pShow->offset[cols] * rows + pShow->bytes[cols] * numOfRows;
+    *(int32_t *)pWrite = pFunc->bufSize;
+    cols++;
+
+    numOfRows++;
+    sdbRelease(pSdb, pFunc);
+  }
+
+  mnodeVacuumResult(data, pShow->numOfColumns, numOfRows, rows, pShow);
+  pShow->numOfReads += numOfRows;
+  return numOfRows;
+}
+
+static void mndCancelGetNextFunc(SMnode *pMnode, void *pIter) {
+  SSdb *pSdb = pMnode->pSdb;
+  sdbCancelFetch(pSdb, pIter);
+}
\ No newline at end of file
diff --git a/source/dnode/mnode/impl/src/mndUser.c b/source/dnode/mnode/impl/src/mndUser.c
index b3c23c0372..4dc114e17a 100644
--- a/source/dnode/mnode/impl/src/mndUser.c
+++ b/source/dnode/mnode/impl/src/mndUser.c
@@ -480,7 +480,6 @@ static int32_t mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *p
   cols++;
 
   pMeta->numOfColumns = htons(cols);
-  strcpy(pMeta->tableFname, "show users");
   pShow->numOfColumns = cols;
 
   pShow->offset[0] = 0;
@@ -490,6 +489,7 @@ static int32_t mndGetUserMeta(SMnodeMsg *pMsg, SShowObj *pShow, STableMetaMsg *p
 
   pShow->numOfRows = sdbGetSize(pSdb, SDB_USER);
   pShow->rowSize = pShow->offset[cols - 1] + pShow->bytes[cols - 1];
+  strcpy(pMeta->tableFname, "show users");
   return 0;
 }
 
diff --git a/source/libs/function/src/tfunction.c b/source/libs/function/src/tfunction.c
index 9e70b9a68d..36c9e2513f 100644
--- a/source/libs/function/src/tfunction.c
+++ b/source/libs/function/src/tfunction.c
@@ -343,7 +343,7 @@ bool isProjectionQueryOnSTable(SArray* pFunctionIdList, int32_t tableIndex) {
 //
 //    if (functionId < 0) {
 //      SUdfInfo* pUdfInfo = taosArrayGet(pQueryInfo->pUdfInfo, -1 * functionId - 1);
-//      if (pUdfInfo->funcType == TSDB_UDF_TYPE_AGGREGATE) {
+//      if (pUdfInfo->funcType == TSDB_FUNC_TYPE_AGGREGATE) {
 //        return false;
 //      }
 //
diff --git a/source/libs/function/src/tudf.c b/source/libs/function/src/tudf.c
index 095c5a6bb0..2771a9ecf8 100644
--- a/source/libs/function/src/tudf.c
+++ b/source/libs/function/src/tudf.c
@@ -146,7 +146,7 @@ void doInvokeUdf(struct SUdfInfo* pUdfInfo, SQLFunctionCtx *pCtx, int32_t idx, i
           pCtx->pOutput, interBuf, (char *)pCtx->ptsOutputBuf, &output, pCtx->resDataInfo.type, pCtx->resDataInfo.bytes, &pUdfInfo->init);
       }
 
-      if (pUdfInfo->funcType == TSDB_UDF_TYPE_AGGREGATE) {
+      if (pUdfInfo->funcType == TSDB_FUNC_TYPE_AGGREGATE) {
         pCtx->resultInfo->numOfRes = output;
       } else {
         pCtx->resultInfo->numOfRes += output;
diff --git a/source/util/src/terror.c b/source/util/src/terror.c
index 3a36ad9b42..c8904d6248 100644
--- a/source/util/src/terror.c
+++ b/source/util/src/terror.c
@@ -211,11 +211,12 @@ TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_STABLE_NAME,      "Super table does not
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_CREATE_TABLE_MSG, "Invalid create table message")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_EXCEED_MAX_ROW_BYTES,     "Exceed max row bytes")
 
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_NAME,        "Invalid func name")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_LEN,         "Invalid func length")
-TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_CODE,        "Invalid func code")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_FUNC_ALREADY_EXIST,       "Func already exists")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_FUNC_NOT_EXIST,           "Func not exists")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC,             "Invalid func")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_NAME,        "Invalid func name")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_COMMENT,     "Invalid func comment")
+TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_CODE,        "Invalid func code")
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_FUNC_BUFSIZE,     "Invalid func bufSize")
 
 TAOS_DEFINE_ERROR(TSDB_CODE_MND_INVALID_TAG_LENGTH,        "invalid tag length")