diff --git a/include/common/taosmsg.h b/include/common/taosmsg.h
index 11a38a3742..a788df2e32 100644
--- a/include/common/taosmsg.h
+++ b/include/common/taosmsg.h
@@ -50,9 +50,8 @@ TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_CONSUME, "mq-consume" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_QUERY, "mq-query" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_CONNECT, "mq-connect" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_DISCONNECT, "mq-disconnect" )
-TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_SET, "mq-set" )
+TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_MQ_SET_CUR, "mq-set-cur" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_RSP_READY, "rsp-ready" )
-
 // message from client to mnode
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CONNECT, "connect" )
 TAOS_DEFINE_MESSAGE_TYPE( TSDB_MSG_TYPE_CREATE_ACCT, "create-acct" )	
@@ -225,6 +224,7 @@ typedef struct SBuildUseDBInput {
   int32_t vgVersion;
 } SBuildUseDBInput;
 
+
 #pragma pack(push, 1)
 
 // null-terminated string instead of char array to avoid too many memory consumption in case of more than 1M tableMeta
@@ -343,7 +343,7 @@ typedef struct {
 typedef struct {
   char    tableFname[TSDB_TABLE_FNAME_LEN];
   char    db[TSDB_FULL_DB_NAME_LEN];
-  int16_t type;      /* operation type   */
+  int16_t type; /* operation type   */
   int16_t numOfCols; /* number of schema */
   int32_t tagValLen;
   SSchema schema[];
@@ -545,8 +545,8 @@ typedef struct {
   int32_t     sqlstrLen;      // sql query string
   int32_t     prevResultLen;  // previous result length
   int32_t     numOfOperator;
-  int32_t     tableScanOperator;  // table scan operator. -1 means no scan operator
-  int32_t     udfNum;             // number of udf function
+  int32_t     tableScanOperator;// table scan operator. -1 means no scan operator
+  int32_t     udfNum;           // number of udf function
   int32_t     udfContentOffset;
   int32_t     udfContentLen;
   SColumnInfo tableCols[];
@@ -1005,27 +1005,35 @@ typedef struct {
 
 // mq related
 typedef struct {
+
 } SMqConnectReq;
 
 typedef struct {
+
 } SMqConnectRsp;
 
 typedef struct {
+
 } SMqDisconnectReq;
 
 typedef struct {
+
 } SMqDisconnectRsp;
 
 typedef struct {
+
 } SMqAckReq;
 
 typedef struct {
+
 } SMqAckRsp;
 
 typedef struct {
+
 } SMqResetReq;
 
 typedef struct {
+
 } SMqResetRsp;
 // mq related end
 
diff --git a/include/dnode/vnode/tq/tq.h b/include/dnode/vnode/tq/tq.h
index 7993a8f1ab..60a8c252c0 100644
--- a/include/dnode/vnode/tq/tq.h
+++ b/include/dnode/vnode/tq/tq.h
@@ -16,86 +16,76 @@
 #ifndef _TD_TQ_H_
 #define _TD_TQ_H_
 
+#include "common.h"
 #include "mallocator.h"
 #include "os.h"
+#include "taoserror.h"
+#include "taosmsg.h"
+#include "tlist.h"
 #include "tutil.h"
 
 #ifdef __cplusplus
 extern "C" {
 #endif
 
-typedef struct TmqMsgHead {
+typedef struct STqMsgHead {
   int32_t protoVer;
   int32_t msgType;
   int64_t cgId;
   int64_t clientId;
-} TmqMsgHead;
+} STqMsgHead;
 
-typedef struct TmqOneAck {
+typedef struct STqOneAck {
   int64_t topicId;
   int64_t consumeOffset;
-} TmqOneAck;
+} STqOneAck;
 
-typedef struct TmqAcks {
+typedef struct STqAcks {
   int32_t ackNum;
   // should be sorted
-  TmqOneAck acks[];
-} TmqAcks;
+  STqOneAck acks[];
+} STqAcks;
 
-// TODO: put msgs into common
-typedef struct TmqConnectReq {
-  TmqMsgHead head;
-  TmqAcks    acks;
-} TmqConnectReq;
-
-typedef struct TmqConnectRsp {
-  TmqMsgHead head;
-  int8_t     status;
-} TmqConnectRsp;
-
-typedef struct TmqDisconnectReq {
-  TmqMsgHead head;
-} TmqDiscconectReq;
-
-typedef struct TmqDisconnectRsp {
-  TmqMsgHead head;
-  int8_t     status;
-} TmqDisconnectRsp;
+typedef struct STqSetCurReq {
+  STqMsgHead head;
+  int64_t    topicId;
+  int64_t    offset;
+} STqSetCurReq;
 
 typedef struct STqConsumeReq {
-  TmqMsgHead head;
-  TmqAcks    acks;
+  STqMsgHead head;
+  STqAcks    acks;
 } STqConsumeReq;
 
-typedef struct TmqMsgContent {
+typedef struct STqMsgContent {
   int64_t topicId;
   int64_t msgLen;
   char    msg[];
-} TmqMsgContent;
+} STqMsgContent;
 
 typedef struct STqConsumeRsp {
-  TmqMsgHead    head;
+  STqMsgHead    head;
   int64_t       bodySize;
-  TmqMsgContent msgs[];
+  STqMsgContent msgs[];
 } STqConsumeRsp;
 
-typedef struct TmqSubscribeReq {
-  TmqMsgHead head;
+typedef struct STqSubscribeReq {
+  STqMsgHead head;
   int32_t    topicNum;
   int64_t    topic[];
-} TmqSubscribeReq;
+} STqSubscribeReq;
 
-typedef struct tmqSubscribeRsp {
-  TmqMsgHead head;
+typedef struct STqSubscribeRsp {
+  STqMsgHead head;
   int64_t    vgId;
   char       ep[TSDB_EP_LEN];  // TSDB_EP_LEN
-} TmqSubscribeRsp;
+} STqSubscribeRsp;
 
-typedef struct TmqHeartbeatReq {
-} TmqHeartbeatReq;
+typedef struct STqHeartbeatReq {
+} STqHeartbeatReq;
 
-typedef struct TmqHeartbeatRsp {
-} TmqHeartbeatRsp;
+typedef struct STqHeartbeatRsp {
+} STqHeartbeatRsp;
 
 typedef struct STqTopicVhandle {
   int64_t topicId;
@@ -108,48 +98,54 @@ typedef struct STqTopicVhandle {
 
 #define TQ_BUFFER_SIZE 8
 
+typedef struct STqExec {
+  void* runtimeEnv;
+  SSDataBlock* (*exec)(void* runtimeEnv);
+  void* (*assign)(void* runtimeEnv, SSubmitBlk* inputData);
+  void (*clear)(void* runtimeEnv);
+  char* (*serialize)(struct STqExec*);
+  struct STqExec* (*deserialize)(char*);
+} STqExec;
+
 typedef struct STqBufferItem {
   int64_t offset;
   // executors are identical but not concurrent
   // so there must be a copy in each item
-  void*   executor;
-  int64_t size;
-  void*   content;
-} STqBufferItem;
+  STqExec* executor;
+  int32_t  status;
+  int64_t  size;
+  void*    content;
+} STqMsgItem;
 
-typedef struct STqBufferHandle {
+typedef struct STqTopic {
   // char* topic; //c style, end with '\0'
   // int64_t cgId;
   // void* ahandle;
-  int64_t       nextConsumeOffset;
-  int64_t       floatingCursor;
-  int64_t       topicId;
-  int32_t       head;
-  int32_t       tail;
-  STqBufferItem buffer[TQ_BUFFER_SIZE];
-} STqBufferHandle;
+  int64_t    nextConsumeOffset;
+  int64_t    floatingCursor;
+  int64_t    topicId;
+  int32_t    head;
+  int32_t    tail;
+  STqMsgItem buffer[TQ_BUFFER_SIZE];
+} STqTopic;
 
 typedef struct STqListHandle {
-  STqBufferHandle       bufHandle;
+  STqTopic              topic;
   struct STqListHandle* next;
-} STqListHandle;
+} STqList;
 
-typedef struct STqGroupHandle {
-  int64_t        cId;
-  int64_t        cgId;
-  void*          ahandle;
-  int32_t        topicNum;
-  STqListHandle* head;
-} STqGroupHandle;
-
-typedef struct STqQueryExec {
-  void*          src;
-  STqBufferItem* dest;
-  void*          executor;
-} STqQueryExec;
+typedef struct STqGroup {
+  int64_t  clientId;
+  int64_t  cgId;
+  void*    ahandle;
+  int32_t  topicNum;
+  STqList* head;
+  SList*   topicList;  // SList<STqTopic>
+  void*    returnMsg;  // SVReadMsg
+} STqGroup;
 
 typedef struct STqQueryMsg {
-  STqQueryExec*       exec;
+  STqMsgItem*         item;
   struct STqQueryMsg* next;
 } STqQueryMsg;
 
@@ -209,15 +205,15 @@ typedef void (*FTqDelete)(void*);
 #define TQ_DUP_INTXN_REWRITE 0
 #define TQ_DUP_INTXN_REJECT 2
 
-static inline bool TqUpdateAppend(int32_t tqConfigFlag) { return tqConfigFlag & TQ_UPDATE_APPEND; }
+static inline bool tqUpdateAppend(int32_t tqConfigFlag) { return tqConfigFlag & TQ_UPDATE_APPEND; }
 
-static inline bool TqDupIntxnReject(int32_t tqConfigFlag) { return tqConfigFlag & TQ_DUP_INTXN_REJECT; }
+static inline bool tqDupIntxnReject(int32_t tqConfigFlag) { return tqConfigFlag & TQ_DUP_INTXN_REJECT; }
 
 static const int8_t TQ_CONST_DELETE = TQ_ACTION_CONST;
 
 #define TQ_DELETE_TOKEN (void*)&TQ_CONST_DELETE
 
-typedef struct TqMetaHandle {
+typedef struct STqMetaHandle {
   int64_t key;
   int64_t offset;
   int64_t serializedSize;
@@ -225,23 +221,25 @@ typedef struct TqMetaHandle {
   void*   valueInTxn;
 } STqMetaHandle;
 
-typedef struct TqMetaList {
-  STqMetaHandle      handle;
-  struct TqMetaList* next;
-  // struct TqMetaList* inTxnPrev;
-  // struct TqMetaList* inTxnNext;
-  struct TqMetaList* unpersistPrev;
-  struct TqMetaList* unpersistNext;
+typedef struct STqMetaList {
+  STqMetaHandle       handle;
+  struct STqMetaList* next;
+  // struct STqMetaList* inTxnPrev;
+  // struct STqMetaList* inTxnNext;
+  struct STqMetaList* unpersistPrev;
+  struct STqMetaList* unpersistNext;
 } STqMetaList;
 
-typedef struct TqMetaStore {
+typedef struct STqMetaStore {
   STqMetaList* bucket[TQ_BUCKET_SIZE];
   // a table head
   STqMetaList* unpersistHead;
+
   // TODO:temporaral use, to be replaced by unified tfile
   int fileFd;
   // TODO:temporaral use, to be replaced by unified tfile
-  int            idxFd;
+  int idxFd;
+
   char*          dirPath;
   int32_t        tqConfigFlag;
   FTqSerialize   pSerializer;
@@ -250,8 +248,8 @@ typedef struct TqMetaStore {
 } STqMetaStore;
 
 typedef struct STQ {
-  // the collection of group handle
-  // the handle of kvstore
+  // the collection of groups
+  // the handle of meta kvstore
   char*         path;
   STqCfg*       tqConfig;
   STqLogReader* tqLogReader;
@@ -266,23 +264,25 @@ void tqClose(STQ*);
 // void* will be replace by a msg type
 int tqPushMsg(STQ*, void* msg, int64_t version);
 int tqCommit(STQ*);
-int tqSetCursor(STQ*, void* msg);
-
 int tqConsume(STQ*, STqConsumeReq*);
 
-STqGroupHandle* tqGetGroupHandle(STQ*, int64_t cId);
+int tqSetCursor(STQ*, STqSetCurReq* pMsg);
+int tqBufferSetOffset(STqTopic*, int64_t offset);
 
-STqGroupHandle* tqOpenTCGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
-int             tqCloseTCGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
-int             tqMoveOffsetToNext(STqGroupHandle*);
-int             tqResetOffset(STQ*, int64_t topicId, int64_t cgId, int64_t offset);
-int             tqRegisterContext(STqGroupHandle*, void* ahandle);
-int             tqLaunchQuery(STqGroupHandle*);
-int             tqSendLaunchQuery(STqGroupHandle*);
+STqTopic* tqFindTopic(STqGroup*, int64_t topicId);
 
-int tqSerializeGroupHandle(const STqGroupHandle* gHandle, STqSerializedHead** ppHead);
+STqGroup* tqGetGroup(STQ*, int64_t clientId);
 
-const void* tqDeserializeGroupHandle(const STqSerializedHead* pHead, STqGroupHandle** gHandle);
+STqGroup* tqOpenGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
+int       tqCloseGroup(STQ*, int64_t topicId, int64_t cgId, int64_t cId);
+int       tqRegisterContext(STqGroup*, void* ahandle);
+int       tqSendLaunchQuery(STqMsgItem*, int64_t offset);
+
+int tqSerializeGroup(const STqGroup*, STqSerializedHead**);
+
+const void* tqDeserializeGroup(const STqSerializedHead*, STqGroup**);
+
+static int tqQueryExecuting(int32_t status) { return status; }
 
 #ifdef __cplusplus
 }
diff --git a/include/util/taoserror.h b/include/util/taoserror.h
index 75aab24f83..95824df5ac 100644
--- a/include/util/taoserror.h
+++ b/include/util/taoserror.h
@@ -339,6 +339,20 @@ int32_t* taosGetErrno();
 #define TSDB_CODE_SYN_INVALID_MSGLEN            TAOS_DEF_ERROR_CODE(0, 0x0909)  //"Invalid msg length")
 #define TSDB_CODE_SYN_INVALID_MSGTYPE           TAOS_DEF_ERROR_CODE(0, 0x090A)  //"Invalid msg type")
 
+// tq
+#define TSDB_CODE_TQ_INVALID_CONFIG             TAOS_DEF_ERROR_CODE(0, 0x0A00)  //"Invalid configuration")
+#define TSDB_CODE_TQ_INIT_FAILED                TAOS_DEF_ERROR_CODE(0, 0x0A01)  //"Tq init failed")
+#define TSDB_CODE_TQ_NO_DISKSPACE               TAOS_DEF_ERROR_CODE(0, 0x0A02)  //"No diskspace for tq")
+#define TSDB_CODE_TQ_NO_DISK_PERMISSIONS        TAOS_DEF_ERROR_CODE(0, 0x0A03)  //"No permission for disk files")
+#define TSDB_CODE_TQ_FILE_CORRUPTED             TAOS_DEF_ERROR_CODE(0, 0x0A04)  //"Data file(s) corrupted")
+#define TSDB_CODE_TQ_OUT_OF_MEMORY              TAOS_DEF_ERROR_CODE(0, 0x0A05)  //"Out of memory")
+#define TSDB_CODE_TQ_FILE_ALREADY_EXISTS        TAOS_DEF_ERROR_CODE(0, 0x0A06)  //"File already exists")
+#define TSDB_CODE_TQ_FAILED_TO_CREATE_DIR       TAOS_DEF_ERROR_CODE(0, 0x0A07)  //"Failed to create dir")
+#define TSDB_CODE_TQ_META_NO_SUCH_KEY           TAOS_DEF_ERROR_CODE(0, 0x0A08)  //"Target key not found")
+#define TSDB_CODE_TQ_META_KEY_NOT_IN_TXN        TAOS_DEF_ERROR_CODE(0, 0x0A09)  //"Target key not in transaction")
+#define TSDB_CODE_TQ_META_KEY_DUP_IN_TXN        TAOS_DEF_ERROR_CODE(0, 0x0A0A)  //"Target key duplicated in transaction")
+#define TSDB_CODE_TQ_GROUP_NOT_SET              TAOS_DEF_ERROR_CODE(0, 0x0A0B)  //"Group of corresponding client is not set by mnode")
+
 // wal
 #define TSDB_CODE_WAL_APP_ERROR                 TAOS_DEF_ERROR_CODE(0, 0x1000)  //"Unexpected generic error in wal")
 #define TSDB_CODE_WAL_FILE_CORRUPTED            TAOS_DEF_ERROR_CODE(0, 0x1001)  //"WAL file is corrupted")
diff --git a/include/util/tlog.h b/include/util/tlog.h
index 5e6604598d..5c91398cdc 100644
--- a/include/util/tlog.h
+++ b/include/util/tlog.h
@@ -42,11 +42,11 @@ extern int32_t qDebugFlag;
 extern int32_t wDebugFlag;
 extern int32_t sDebugFlag;
 extern int32_t tsdbDebugFlag;
+extern int32_t tqDebugFlag;
 extern int32_t cqDebugFlag;
 extern int32_t debugFlag;
 extern int32_t ctgDebugFlag;
 
-
 #define DEBUG_FATAL 1U
 #define DEBUG_ERROR DEBUG_FATAL
 #define DEBUG_WARN 2U
diff --git a/source/dnode/mgmt/impl/src/dndTransport.c b/source/dnode/mgmt/impl/src/dndTransport.c
index 3402d3ff68..50b1a1cf20 100644
--- a/source/dnode/mgmt/impl/src/dndTransport.c
+++ b/source/dnode/mgmt/impl/src/dndTransport.c
@@ -44,7 +44,7 @@ static void dndInitMsgFp(STransMgmt *pMgmt) {
   pMgmt->msgFp[TSDB_MSG_TYPE_MQ_CONSUME] = dndProcessVnodeQueryMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_MQ_CONNECT] = dndProcessVnodeWriteMsg;
   pMgmt->msgFp[TSDB_MSG_TYPE_MQ_DISCONNECT] = dndProcessVnodeWriteMsg;
-  pMgmt->msgFp[TSDB_MSG_TYPE_MQ_SET] = dndProcessVnodeWriteMsg;
+  pMgmt->msgFp[TSDB_MSG_TYPE_MQ_SET_CUR] = dndProcessVnodeWriteMsg;
 
   // msg from client to mnode
   pMgmt->msgFp[TSDB_MSG_TYPE_CONNECT] = dndProcessMnodeReadMsg;
diff --git a/source/dnode/vnode/impl/src/vnodeWrite.c b/source/dnode/vnode/impl/src/vnodeWrite.c
index 85e044266a..fc977ce03f 100644
--- a/source/dnode/vnode/impl/src/vnodeWrite.c
+++ b/source/dnode/vnode/impl/src/vnodeWrite.c
@@ -16,17 +16,13 @@
 #include "vnodeDef.h"
 
 int vnodeProcessNoWalWMsgs(SVnode *pVnode, SRpcMsg *pMsg) {
-  SVnodeReq *pVnodeReq;
-
   switch (pMsg->msgType) {
-    case TSDB_MSG_TYPE_MQ_SET:
+    case TSDB_MSG_TYPE_MQ_SET_CUR:
       if (tqSetCursor(pVnode->pTq, pMsg->pCont) < 0) {
         // TODO: handle error
       }
       break;
   }
-
-  void *pBuf = pMsg->pCont;
   return 0;
 }
 
diff --git a/source/dnode/vnode/tq/CMakeLists.txt b/source/dnode/vnode/tq/CMakeLists.txt
index 536e97d5f7..8d59c7b07a 100644
--- a/source/dnode/vnode/tq/CMakeLists.txt
+++ b/source/dnode/vnode/tq/CMakeLists.txt
@@ -11,6 +11,7 @@ target_link_libraries(
     PUBLIC wal
     PUBLIC os
     PUBLIC util
+    PUBLIC common
 )
 
 if(${BUILD_TEST})
diff --git a/source/dnode/vnode/tq/inc/tqInt.h b/source/dnode/vnode/tq/inc/tqInt.h
index 022b599816..5685a29d03 100644
--- a/source/dnode/vnode/tq/inc/tqInt.h
+++ b/source/dnode/vnode/tq/inc/tqInt.h
@@ -17,11 +17,20 @@
 #define _TD_TQ_INT_H_
 
 #include "tq.h"
-
+#include "tlog.h"
 #ifdef __cplusplus
 extern "C" {
 #endif
 
+extern int32_t tqDebugFlag;
+
+#define tqFatal(...) { if (tqDebugFlag & DEBUG_FATAL) { taosPrintLog("TQ  FATAL ", 255, __VA_ARGS__); }}
+#define tqError(...) { if (tqDebugFlag & DEBUG_ERROR) { taosPrintLog("TQ  ERROR ", 255, __VA_ARGS__); }}
+#define tqWarn(...)  { if (tqDebugFlag & DEBUG_WARN)  { taosPrintLog("TQ  WARN ", 255, __VA_ARGS__); }}
+#define tqInfo(...)  { if (tqDebugFlag & DEBUG_INFO)  { taosPrintLog("TQ  ", 255, __VA_ARGS__); }}
+#define tqDebug(...) { if (tqDebugFlag & DEBUG_DEBUG) { taosPrintLog("TQ  ", tqDebugFlag, __VA_ARGS__); }}
+#define tqTrace(...) { if (tqDebugFlag & DEBUG_TRACE) { taosPrintLog("TQ  ", tqDebugFlag, __VA_ARGS__); }}
+
 // create persistent storage for meta info such as consuming offset
 // return value > 0: cgId
 // return value <= 0: error code
diff --git a/source/dnode/vnode/tq/inc/tqMetaStore.h b/source/dnode/vnode/tq/inc/tqMetaStore.h
index 5bcedaed74..ef71d8bf14 100644
--- a/source/dnode/vnode/tq/inc/tqMetaStore.h
+++ b/source/dnode/vnode/tq/inc/tqMetaStore.h
@@ -17,7 +17,7 @@
 #define _TQ_META_STORE_H_
 
 #include "os.h"
-#include "tq.h"
+#include "tqInt.h"
 
 #ifdef __cplusplus
 extern "C" {
diff --git a/source/dnode/vnode/tq/src/tq.c b/source/dnode/vnode/tq/src/tq.c
index 1a27870a1b..d8dfe4ddcf 100644
--- a/source/dnode/vnode/tq/src/tq.c
+++ b/source/dnode/vnode/tq/src/tq.c
@@ -24,89 +24,80 @@
 // handle management message
 //
 
-int tqGetgHandleSSize(const STqGroupHandle* gHandle);
-int tqBufHandleSSize();
-int tqBufItemSSize();
+int tqGroupSSize(const STqGroup* pGroup);
+int tqTopicSSize();
+int tqItemSSize();
 
-STqGroupHandle* tqFindHandle(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
-  STqGroupHandle* gHandle;
-  return NULL;
-}
+void* tqSerializeListHandle(STqList* listHandle, void* ptr);
+void* tqSerializeTopic(STqTopic* pTopic, void* ptr);
+void* tqSerializeItem(STqMsgItem* pItem, void* ptr);
 
-void* tqSerializeListHandle(STqListHandle* listHandle, void* ptr);
-void* tqSerializeBufHandle(STqBufferHandle* bufHandle, void* ptr);
-void* tqSerializeBufItem(STqBufferItem* bufItem, void* ptr);
-
-const void* tqDeserializeBufHandle(const void* pBytes, STqBufferHandle* bufHandle);
-const void* tqDeserializeBufItem(const void* pBytes, STqBufferItem* bufItem);
+const void* tqDeserializeTopic(const void* pBytes, STqTopic* pTopic);
+const void* tqDeserializeItem(const void* pBytes, STqMsgItem* pItem);
 
 STQ* tqOpen(const char* path, STqCfg* tqConfig, STqLogReader* tqLogReader, SMemAllocatorFactory* allocFac) {
   STQ* pTq = malloc(sizeof(STQ));
   if (pTq == NULL) {
-    // TODO: memory error
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return NULL;
   }
   pTq->path = strdup(path);
   pTq->tqConfig = tqConfig;
   pTq->tqLogReader = tqLogReader;
   pTq->tqMemRef.pAlloctorFactory = allocFac;
-  // pTq->tqMemRef.pAllocator = allocFac->create(allocFac);
+  pTq->tqMemRef.pAllocator = allocFac->create(allocFac);
   if (pTq->tqMemRef.pAllocator == NULL) {
-    // TODO
+    // TODO: error code of buffer pool
   }
-  pTq->tqMeta =
-      tqStoreOpen(path, (FTqSerialize)tqSerializeGroupHandle, (FTqDeserialize)tqDeserializeGroupHandle, free, 0);
+  pTq->tqMeta = tqStoreOpen(path, (FTqSerialize)tqSerializeGroup, (FTqDeserialize)tqDeserializeGroup, free, 0);
   if (pTq->tqMeta == NULL) {
     // TODO: free STQ
     return NULL;
   }
   return pTq;
 }
-
-void tqClose(STQ*pTq) {
+void tqClose(STQ* pTq) {
   // TODO
 }
 
-static int tqProtoCheck(TmqMsgHead *pMsg) {
-  return pMsg->protoVer == 0;
-}
+static int tqProtoCheck(STqMsgHead* pMsg) { return pMsg->protoVer == 0; }
 
-static int tqAckOneTopic(STqBufferHandle* bHandle, TmqOneAck* pAck, STqQueryMsg** ppQuery) {
+static int tqAckOneTopic(STqTopic* pTopic, STqOneAck* pAck, STqQueryMsg** ppQuery) {
   // clean old item and move forward
   int32_t consumeOffset = pAck->consumeOffset;
   int     idx = consumeOffset % TQ_BUFFER_SIZE;
-  ASSERT(bHandle->buffer[idx].content && bHandle->buffer[idx].executor);
-  tfree(bHandle->buffer[idx].content);
+  ASSERT(pTopic->buffer[idx].content && pTopic->buffer[idx].executor);
+  tfree(pTopic->buffer[idx].content);
   if (1 /* TODO: need to launch new query */) {
     STqQueryMsg* pNewQuery = malloc(sizeof(STqQueryMsg));
     if (pNewQuery == NULL) {
-      // TODO: memory insufficient
+      terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
       return -1;
     }
     // TODO: lock executor
-    pNewQuery->exec->executor = bHandle->buffer[idx].executor;
     // TODO: read from wal and assign to src
-    pNewQuery->exec->src = 0;
-    pNewQuery->exec->dest = &bHandle->buffer[idx];
-    pNewQuery->next = *ppQuery;
-    *ppQuery = pNewQuery;
+    /*pNewQuery->exec->executor = pTopic->buffer[idx].executor;*/
+    /*pNewQuery->exec->src = 0;*/
+    /*pNewQuery->exec->dest = &pTopic->buffer[idx];*/
+    /*pNewQuery->next = *ppQuery;*/
+    /**ppQuery = pNewQuery;*/
   }
   return 0;
 }
 
-static int tqAck(STqGroupHandle* gHandle, TmqAcks* pAcks) {
+static int tqAck(STqGroup* pGroup, STqAcks* pAcks) {
   int32_t    ackNum = pAcks->ackNum;
-  TmqOneAck* acks = pAcks->acks;
+  STqOneAck* acks = pAcks->acks;
   // double ptr for acks and list
-  int            i = 0;
-  STqListHandle* node = gHandle->head;
-  int            ackCnt = 0;
-  STqQueryMsg*   pQuery = NULL;
+  int          i = 0;
+  STqList*     node = pGroup->head;
+  int          ackCnt = 0;
+  STqQueryMsg* pQuery = NULL;
   while (i < ackNum && node->next) {
-    if (acks[i].topicId == node->next->bufHandle.topicId) {
+    if (acks[i].topicId == node->next->topic.topicId) {
       ackCnt++;
-      tqAckOneTopic(&node->next->bufHandle, &acks[i], &pQuery);
-    } else if (acks[i].topicId < node->next->bufHandle.topicId) {
+      tqAckOneTopic(&node->next->topic, &acks[i], &pQuery);
+    } else if (acks[i].topicId < node->next->topic.topicId) {
       i++;
     } else {
       node = node->next;
@@ -118,52 +109,56 @@ static int tqAck(STqGroupHandle* gHandle, TmqAcks* pAcks) {
   return ackCnt;
 }
 
-static int tqCommitTCGroup(STqGroupHandle* handle) {
+static int tqCommitGroup(STqGroup* pGroup) {
   // persist modification into disk
   return 0;
 }
 
-int tqCreateTCGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId, STqGroupHandle** handle) {
+int tqCreateGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId, STqGroup** ppGroup) {
   // create in disk
-  STqGroupHandle* gHandle = (STqGroupHandle*)malloc(sizeof(STqGroupHandle));
-  if (gHandle == NULL) {
+  STqGroup* pGroup = (STqGroup*)malloc(sizeof(STqGroup));
+  if (pGroup == NULL) {
     // TODO
     return -1;
   }
-  memset(gHandle, 0, sizeof(STqGroupHandle));
+  *ppGroup = pGroup;
+  memset(pGroup, 0, sizeof(STqGroup));
 
   return 0;
 }
 
-STqGroupHandle* tqOpenTCGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
-  STqGroupHandle* gHandle = tqHandleGet(pTq->tqMeta, cId);
-  if (gHandle == NULL) {
-    int code = tqCreateTCGroup(pTq, topicId, cgId, cId, &gHandle);
-    if (code != 0) {
+STqGroup* tqOpenGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
+  STqGroup* pGroup = tqHandleGet(pTq->tqMeta, cId);
+  if (pGroup == NULL) {
+    int code = tqCreateGroup(pTq, topicId, cgId, cId, &pGroup);
+    if (code < 0) {
       // TODO
       return NULL;
     }
+    tqHandleMovePut(pTq->tqMeta, cId, pGroup);
   }
+  ASSERT(pGroup);
 
-  // create
-  // open
-  return gHandle;
+  return pGroup;
 }
 
-int tqCloseTCGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) { return 0; }
+int tqCloseGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
+  // TODO
+  return 0;
+}
 
-int tqDropTCGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
+int tqDropGroup(STQ* pTq, int64_t topicId, int64_t cgId, int64_t cId) {
   // delete from disk
   return 0;
 }
 
-static int tqFetch(STqGroupHandle* gHandle, void** msg) {
-  STqListHandle* head = gHandle->head;
-  STqListHandle* node = head;
-  int            totSize = 0;
+static int tqFetch(STqGroup* pGroup, void** msg) {
+  STqList* head = pGroup->head;
+  STqList* node = head;
+  int      totSize = 0;
   // TODO: make it a macro
   int            sizeLimit = 4 * 1024;
-  TmqMsgContent* buffer = malloc(sizeLimit);
+  STqMsgContent* buffer = malloc(sizeLimit);
   if (buffer == NULL) {
     // TODO:memory insufficient
     return -1;
@@ -172,25 +167,25 @@ static int tqFetch(STqGroupHandle* gHandle, void** msg) {
   // until all topic iterated or msgs over sizeLimit
   while (node->next) {
     node = node->next;
-    STqBufferHandle* bufHandle = &node->bufHandle;
-    int              idx = bufHandle->nextConsumeOffset % TQ_BUFFER_SIZE;
-    if (bufHandle->buffer[idx].content != NULL && bufHandle->buffer[idx].offset == bufHandle->nextConsumeOffset) {
-      totSize += bufHandle->buffer[idx].size;
+    STqTopic* topicHandle = &node->topic;
+    int       idx = topicHandle->nextConsumeOffset % TQ_BUFFER_SIZE;
+    if (topicHandle->buffer[idx].content != NULL && topicHandle->buffer[idx].offset == topicHandle->nextConsumeOffset) {
+      totSize += topicHandle->buffer[idx].size;
       if (totSize > sizeLimit) {
         void* ptr = realloc(buffer, totSize);
         if (ptr == NULL) {
-          totSize -= bufHandle->buffer[idx].size;
+          totSize -= topicHandle->buffer[idx].size;
           // TODO:memory insufficient
           // return msgs already copied
           break;
         }
       }
-      *((int64_t*)buffer) = bufHandle->topicId;
+      *((int64_t*)buffer) = topicHandle->topicId;
       buffer = POINTER_SHIFT(buffer, sizeof(int64_t));
-      *((int64_t*)buffer) = bufHandle->buffer[idx].size;
+      *((int64_t*)buffer) = topicHandle->buffer[idx].size;
       buffer = POINTER_SHIFT(buffer, sizeof(int64_t));
-      memcpy(buffer, bufHandle->buffer[idx].content, bufHandle->buffer[idx].size);
-      buffer = POINTER_SHIFT(buffer, bufHandle->buffer[idx].size);
+      memcpy(buffer, topicHandle->buffer[idx].content, topicHandle->buffer[idx].size);
+      buffer = POINTER_SHIFT(buffer, topicHandle->buffer[idx].size);
       if (totSize > sizeLimit) {
         break;
       }
@@ -199,11 +194,19 @@ static int tqFetch(STqGroupHandle* gHandle, void** msg) {
   return totSize;
 }
 
-STqGroupHandle* tqGetGroupHandle(STQ* pTq, int64_t cId) { return NULL; }
+STqGroup* tqGetGroup(STQ* pTq, int64_t clientId) { return tqHandleGet(pTq->tqMeta, clientId); }
 
-int tqLaunchQuery(STqGroupHandle* gHandle) { return 0; }
-
-int tqSendLaunchQuery(STqGroupHandle* gHandle) { return 0; }
+int tqSendLaunchQuery(STqMsgItem* bufItem, int64_t offset) {
+  if (tqQueryExecuting(bufItem->status)) {
+    return 0;
+  }
+  bufItem->status = 1;
+  // load data from wal or buffer pool
+  // put into exec
+  // send exec into non blocking queue
+  // when query finished, put into buffer pool
+  return 0;
+}
 
 /*int tqMoveOffsetToNext(TqGroupHandle* gHandle) {*/
 /*return 0;*/
@@ -220,23 +223,96 @@ int tqCommit(STQ* pTq) {
   return 0;
 }
 
-int tqSetCursor(STQ* pTq, void* msg) {
+int tqBufferSetOffset(STqTopic* pTopic, int64_t offset) {
+  int code;
+  memset(pTopic->buffer, 0, sizeof(pTopic->buffer));
+  // launch query
+  for (int i = offset; i < offset + TQ_BUFFER_SIZE; i++) {
+    int pos = i % TQ_BUFFER_SIZE;
+    code = tqSendLaunchQuery(&pTopic->buffer[pos], offset);
+    if (code < 0) {
+      // TODO: error handling
+    }
+  }
+  // set offset
+  pTopic->nextConsumeOffset = offset;
+  pTopic->floatingCursor = offset;
   return 0;
 }
 
-int tqConsume(STQ* pTq, STqConsumeReq* pMsg) {
-  if (!tqProtoCheck((TmqMsgHead*)pMsg)) {
-    // proto version invalid
-    return -1;
-  }
-  int64_t         clientId = pMsg->head.clientId;
-  STqGroupHandle* gHandle = tqGetGroupHandle(pTq, clientId);
+STqTopic* tqFindTopic(STqGroup* pGroup, int64_t topicId) {
+  // TODO
+  return NULL;
+}
+
+int tqSetCursor(STQ* pTq, STqSetCurReq* pMsg) {
+  int       code;
+  int64_t   clientId = pMsg->head.clientId;
+  int64_t   topicId = pMsg->topicId;
+  int64_t   offset = pMsg->offset;
+  STqGroup* gHandle = tqGetGroup(pTq, clientId);
   if (gHandle == NULL) {
     // client not connect
     return -1;
   }
+  STqTopic* topicHandle = tqFindTopic(gHandle, topicId);
+  if (topicHandle == NULL) {
+    return -1;
+  }
+  if (pMsg->offset == topicHandle->nextConsumeOffset) {
+    return 0;
+  }
+  // TODO: check log last version
+
+  code = tqBufferSetOffset(topicHandle, offset);
+  if (code < 0) {
+    // set error code
+    return -1;
+  }
+
+  return 0;
+}
+
+int tqConsume(STQ* pTq, STqConsumeReq* pMsg) {
+  int64_t   clientId = pMsg->head.clientId;
+  STqGroup* pGroup = tqGetGroup(pTq, clientId);
+  if (pGroup == NULL) {
+    terrno = TSDB_CODE_TQ_GROUP_NOT_SET;
+    return -1;
+  }
+
+  STqConsumeRsp* pRsp = (STqConsumeRsp*)pMsg;
+  int            numOfMsgs = tqFetch(pGroup, (void**)&pRsp->msgs);
+  if (numOfMsgs < 0) {
+    return -1;
+  }
+  if (numOfMsgs == 0) {
+    // most recent data has been fetched
+
+    // enable timer for blocking wait
+    // once new data written during wait time
+    // launch query and response
+  }
+
+  // fetched a num of msgs, rpc response
+
+  return 0;
+}
+
+#if 0
+int tqConsume(STQ* pTq, STqConsumeReq* pMsg) {
+  if (!tqProtoCheck((STqMsgHead*)pMsg)) {
+    // proto version invalid
+    return -1;
+  }
+  int64_t   clientId = pMsg->head.clientId;
+  STqGroup* pGroup = tqGetGroup(pTq, clientId);
+  if (pGroup == NULL) {
+    // client not connect
+    return -1;
+  }
   if (pMsg->acks.ackNum != 0) {
-    if (tqAck(gHandle, &pMsg->acks) != 0) {
+    if (tqAck(pGroup, &pMsg->acks) != 0) {
       // ack not success
       return -1;
     }
@@ -244,22 +320,23 @@ int tqConsume(STQ* pTq, STqConsumeReq* pMsg) {
 
   STqConsumeRsp* pRsp = (STqConsumeRsp*)pMsg;
 
-  if (tqFetch(gHandle, (void**)&pRsp->msgs) <= 0) {
+  if (tqFetch(pGroup, (void**)&pRsp->msgs) <= 0) {
     // fetch error
     return -1;
   }
 
   // judge and launch new query
-  if (tqLaunchQuery(gHandle)) {
-    // launch query error
-    return -1;
-  }
+  /*if (tqSendLaunchQuery(gHandle)) {*/
+  // launch query error
+  /*return -1;*/
+  /*}*/
   return 0;
 }
+#endif
 
-int tqSerializeGroupHandle(const STqGroupHandle* gHandle, STqSerializedHead** ppHead) {
+int tqSerializeGroup(const STqGroup* pGroup, STqSerializedHead** ppHead) {
   // calculate size
-  int sz = tqGetgHandleSSize(gHandle) + sizeof(STqSerializedHead);
+  int sz = tqGroupSSize(pGroup) + sizeof(STqSerializedHead);
   if (sz > (*ppHead)->ssize) {
     void* tmpPtr = realloc(*ppHead, sz);
     if (tmpPtr == NULL) {
@@ -272,53 +349,53 @@ int tqSerializeGroupHandle(const STqGroupHandle* gHandle, STqSerializedHead** pp
   }
   void* ptr = (*ppHead)->content;
   // do serialization
-  *(int64_t*)ptr = gHandle->cId;
+  *(int64_t*)ptr = pGroup->clientId;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  *(int64_t*)ptr = gHandle->cgId;
+  *(int64_t*)ptr = pGroup->cgId;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  *(int32_t*)ptr = gHandle->topicNum;
+  *(int32_t*)ptr = pGroup->topicNum;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
-  if (gHandle->topicNum > 0) {
-    tqSerializeListHandle(gHandle->head, ptr);
+  if (pGroup->topicNum > 0) {
+    tqSerializeListHandle(pGroup->head, ptr);
   }
   return 0;
 }
 
-void* tqSerializeListHandle(STqListHandle* listHandle, void* ptr) {
-  STqListHandle* node = listHandle;
+void* tqSerializeListHandle(STqList* listHandle, void* ptr) {
+  STqList* node = listHandle;
   ASSERT(node != NULL);
   while (node) {
-    ptr = tqSerializeBufHandle(&node->bufHandle, ptr);
+    ptr = tqSerializeTopic(&node->topic, ptr);
     node = node->next;
   }
   return ptr;
 }
 
-void* tqSerializeBufHandle(STqBufferHandle* bufHandle, void* ptr) {
-  *(int64_t*)ptr = bufHandle->nextConsumeOffset;
+void* tqSerializeTopic(STqTopic* pTopic, void* ptr) {
+  *(int64_t*)ptr = pTopic->nextConsumeOffset;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  *(int64_t*)ptr = bufHandle->topicId;
+  *(int64_t*)ptr = pTopic->topicId;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  *(int32_t*)ptr = bufHandle->head;
+  *(int32_t*)ptr = pTopic->head;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
-  *(int32_t*)ptr = bufHandle->tail;
+  *(int32_t*)ptr = pTopic->tail;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
   for (int i = 0; i < TQ_BUFFER_SIZE; i++) {
-    ptr = tqSerializeBufItem(&bufHandle->buffer[i], ptr);
+    ptr = tqSerializeItem(&pTopic->buffer[i], ptr);
   }
   return ptr;
 }
 
-void* tqSerializeBufItem(STqBufferItem* bufItem, void* ptr) {
+void* tqSerializeItem(STqMsgItem* bufItem, void* ptr) {
   // TODO: do we need serialize this?
   // mainly for executor
   return ptr;
 }
 
-const void* tqDeserializeGroupHandle(const STqSerializedHead* pHead, STqGroupHandle** ppGHandle) {
-  STqGroupHandle* gHandle = *ppGHandle;
-  const void*     ptr = pHead->content;
-  gHandle->cId = *(int64_t*)ptr;
+const void* tqDeserializeGroup(const STqSerializedHead* pHead, STqGroup** ppGroup) {
+  STqGroup*   gHandle = *ppGroup;
+  const void* ptr = pHead->content;
+  gHandle->clientId = *(int64_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
   gHandle->cgId = *(int64_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
@@ -326,63 +403,63 @@ const void* tqDeserializeGroupHandle(const STqSerializedHead* pHead, STqGroupHan
   gHandle->topicNum = *(int32_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
   gHandle->head = NULL;
-  STqListHandle* node = gHandle->head;
+  STqList* node = gHandle->head;
   for (int i = 0; i < gHandle->topicNum; i++) {
     if (gHandle->head == NULL) {
-      if ((node = malloc(sizeof(STqListHandle))) == NULL) {
+      if ((node = malloc(sizeof(STqList))) == NULL) {
         // TODO: error
         return NULL;
       }
       node->next = NULL;
-      ptr = tqDeserializeBufHandle(ptr, &node->bufHandle);
+      ptr = tqDeserializeTopic(ptr, &node->topic);
       gHandle->head = node;
     } else {
-      node->next = malloc(sizeof(STqListHandle));
+      node->next = malloc(sizeof(STqList));
       if (node->next == NULL) {
         // TODO: error
         return NULL;
       }
       node->next->next = NULL;
-      ptr = tqDeserializeBufHandle(ptr, &node->next->bufHandle);
+      ptr = tqDeserializeTopic(ptr, &node->next->topic);
       node = node->next;
     }
   }
   return ptr;
 }
 
-const void* tqDeserializeBufHandle(const void* pBytes, STqBufferHandle* bufHandle) {
+const void* tqDeserializeTopic(const void* pBytes, STqTopic* topic) {
   const void* ptr = pBytes;
-  bufHandle->nextConsumeOffset = *(int64_t*)ptr;
+  topic->nextConsumeOffset = *(int64_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  bufHandle->topicId = *(int64_t*)ptr;
+  topic->topicId = *(int64_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int64_t));
-  bufHandle->head = *(int32_t*)ptr;
+  topic->head = *(int32_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
-  bufHandle->tail = *(int32_t*)ptr;
+  topic->tail = *(int32_t*)ptr;
   ptr = POINTER_SHIFT(ptr, sizeof(int32_t));
   for (int i = 0; i < TQ_BUFFER_SIZE; i++) {
-    ptr = tqDeserializeBufItem(ptr, &bufHandle->buffer[i]);
+    ptr = tqDeserializeItem(ptr, &topic->buffer[i]);
   }
   return ptr;
 }
 
-const void* tqDeserializeBufItem(const void* pBytes, STqBufferItem* bufItem) { return pBytes; }
+const void* tqDeserializeItem(const void* pBytes, STqMsgItem* bufItem) { return pBytes; }
 
 // TODO: make this a macro
-int tqGetgHandleSSize(const STqGroupHandle* gHandle) {
+int tqGroupSSize(const STqGroup* gHandle) {
   return sizeof(int64_t) * 2  // cId + cgId
          + sizeof(int32_t)    // topicNum
-         + gHandle->topicNum * tqBufHandleSSize();
+         + gHandle->topicNum * tqTopicSSize();
 }
 
 // TODO: make this a macro
-int tqBufHandleSSize() {
+int tqTopicSSize() {
   return sizeof(int64_t) * 2    // nextConsumeOffset + topicId
          + sizeof(int32_t) * 2  // head + tail
-         + TQ_BUFFER_SIZE * tqBufItemSSize();
+         + TQ_BUFFER_SIZE * tqItemSSize();
 }
 
-int tqBufItemSSize() {
+int tqItemSSize() {
   // TODO: do this need serialization?
   // mainly for executor
   return 0;
diff --git a/source/dnode/vnode/tq/src/tqMetaStore.c b/source/dnode/vnode/tq/src/tqMetaStore.c
index 082f0ad28e..57e20010e3 100644
--- a/source/dnode/vnode/tq/src/tqMetaStore.c
+++ b/source/dnode/vnode/tq/src/tqMetaStore.c
@@ -56,6 +56,7 @@ static inline int tqReadLastPage(int fd, STqIdxPageBuf* pBuf) {
   int offset = tqSeekLastPage(fd);
   int nBytes;
   if ((nBytes = read(fd, pBuf, TQ_PAGE_SIZE)) == -1) {
+    terrno = TAOS_SYSTEM_ERROR(errno);
     return -1;
   }
   if (nBytes == 0) {
@@ -71,7 +72,7 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
                           int32_t tqConfigFlag) {
   STqMetaStore* pMeta = malloc(sizeof(STqMetaStore));
   if (pMeta == NULL) {
-    // close
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return NULL;
   }
   memset(pMeta, 0, sizeof(STqMetaStore));
@@ -79,8 +80,9 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
   // concat data file name and index file name
   size_t pathLen = strlen(path);
   pMeta->dirPath = malloc(pathLen + 1);
-  if (pMeta->dirPath != NULL) {
-    // TODO: memory insufficient
+  if (pMeta->dirPath == NULL) {
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
+    return NULL;
   }
   strcpy(pMeta->dirPath, path);
 
@@ -88,13 +90,14 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
 
   strcpy(name, path);
   if (taosDirExist(name) != 0 && taosMkDir(name) != 0) {
-    ASSERT(false);
+    terrno = TSDB_CODE_TQ_FAILED_TO_CREATE_DIR;
+    tqError("failed to create dir:%s since %s ", name, terrstr());
   }
   strcat(name, "/" TQ_IDX_NAME);
   int idxFd = open(name, O_RDWR | O_CREAT, 0755);
   if (idxFd < 0) {
-    ASSERT(false);
-    // close file
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    tqError("failed to open file:%s since %s ", name, terrstr());
     // free memory
     return NULL;
   }
@@ -102,9 +105,7 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
   pMeta->idxFd = idxFd;
   pMeta->unpersistHead = malloc(sizeof(STqMetaList));
   if (pMeta->unpersistHead == NULL) {
-    ASSERT(false);
-    // close file
-    // free memory
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return NULL;
   }
   memset(pMeta->unpersistHead, 0, sizeof(STqMetaList));
@@ -114,7 +115,8 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
   strcat(name, "/" TQ_META_NAME);
   int fileFd = open(name, O_RDWR | O_CREAT, 0755);
   if (fileFd < 0) {
-    ASSERT(false);
+    terrno = TAOS_SYSTEM_ERROR(errno);
+    tqError("failed to open file:%s since %s", name, terrstr());
     return NULL;
   }
 
@@ -129,7 +131,7 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
   STqIdxPageBuf      idxBuf;
   STqSerializedHead* serializedObj = malloc(TQ_PAGE_SIZE);
   if (serializedObj == NULL) {
-    // TODO:memory insufficient
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
   }
   int  idxRead;
   int  allocated = TQ_PAGE_SIZE;
@@ -137,14 +139,16 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
   while ((idxRead = read(idxFd, &idxBuf, TQ_PAGE_SIZE))) {
     if (idxRead == -1) {
       // TODO: handle error
-      ASSERT(false);
+      terrno = TAOS_SYSTEM_ERROR(errno);
+      tqError("failed to read tq index file since %s", terrstr());
     }
     ASSERT(idxBuf.head.writeOffset == idxRead);
     // loop read every entry
     for (int i = 0; i < idxBuf.head.writeOffset - TQ_IDX_PAGE_HEAD_SIZE; i += TQ_IDX_SIZE) {
       STqMetaList* pNode = malloc(sizeof(STqMetaList));
       if (pNode == NULL) {
-        // TODO: free memory and return error
+        terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
+        // TODO: free memory
       }
       memset(pNode, 0, sizeof(STqMetaList));
       memcpy(&pNode->handle, &idxBuf.buffer[i], TQ_IDX_SIZE);
@@ -153,7 +157,8 @@ STqMetaStore* tqStoreOpen(const char* path, FTqSerialize serializer, FTqDeserial
       if (allocated < pNode->handle.serializedSize) {
         void* ptr = realloc(serializedObj, pNode->handle.serializedSize);
         if (ptr == NULL) {
-          // TODO: memory insufficient
+          terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
+          // TODO: free memory
         }
         serializedObj = ptr;
         allocated = pNode->handle.serializedSize;
@@ -292,7 +297,7 @@ int32_t tqStorePersist(STqMetaStore* pMeta) {
   STqMetaList*       pNode = pHead->unpersistNext;
   STqSerializedHead* pSHead = malloc(sizeof(STqSerializedHead));
   if (pSHead == NULL) {
-    // TODO: memory error
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return -1;
   }
   pSHead->ver = TQ_SVER;
@@ -403,7 +408,6 @@ static int32_t tqHandlePutCommitted(STqMetaStore* pMeta, int64_t key, void* valu
   STqMetaList* pNode = pMeta->bucket[bucketKey];
   while (pNode) {
     if (pNode->handle.key == key) {
-      // TODO: think about thread safety
       if (pNode->handle.valueInUse && pNode->handle.valueInUse != TQ_DELETE_TOKEN) {
         pMeta->pDeleter(pNode->handle.valueInUse);
       }
@@ -416,7 +420,7 @@ static int32_t tqHandlePutCommitted(STqMetaStore* pMeta, int64_t key, void* valu
   }
   STqMetaList* pNewNode = malloc(sizeof(STqMetaList));
   if (pNewNode == NULL) {
-    // TODO: memory error
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return -1;
   }
   memset(pNewNode, 0, sizeof(STqMetaList));
@@ -470,10 +474,10 @@ static inline int32_t tqHandlePutImpl(STqMetaStore* pMeta, int64_t key, void* va
   STqMetaList* pNode = pMeta->bucket[bucketKey];
   while (pNode) {
     if (pNode->handle.key == key) {
-      // TODO: think about thread safety
       if (pNode->handle.valueInTxn) {
-        if (TqDupIntxnReject(pMeta->tqConfigFlag)) {
-          return -2;
+        if (tqDupIntxnReject(pMeta->tqConfigFlag)) {
+          terrno = TSDB_CODE_TQ_META_KEY_DUP_IN_TXN;
+          return -1;
         }
         if (pNode->handle.valueInTxn != TQ_DELETE_TOKEN) {
           pMeta->pDeleter(pNode->handle.valueInTxn);
@@ -488,7 +492,7 @@ static inline int32_t tqHandlePutImpl(STqMetaStore* pMeta, int64_t key, void* va
   }
   STqMetaList* pNewNode = malloc(sizeof(STqMetaList));
   if (pNewNode == NULL) {
-    // TODO: memory error
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return -1;
   }
   memset(pNewNode, 0, sizeof(STqMetaList));
@@ -505,7 +509,7 @@ int32_t tqHandleMovePut(STqMetaStore* pMeta, int64_t key, void* value) { return
 int32_t tqHandleCopyPut(STqMetaStore* pMeta, int64_t key, void* value, size_t vsize) {
   void* vmem = malloc(vsize);
   if (vmem == NULL) {
-    // TODO: memory error
+    terrno = TSDB_CODE_TQ_OUT_OF_MEMORY;
     return -1;
   }
   memcpy(vmem, value, vsize);
@@ -535,6 +539,7 @@ int32_t tqHandleCommit(STqMetaStore* pMeta, int64_t key) {
   while (pNode) {
     if (pNode->handle.key == key) {
       if (pNode->handle.valueInTxn == NULL) {
+        terrno = TSDB_CODE_TQ_META_KEY_NOT_IN_TXN;
         return -1;
       }
       if (pNode->handle.valueInUse && pNode->handle.valueInUse != TQ_DELETE_TOKEN) {
@@ -548,7 +553,8 @@ int32_t tqHandleCommit(STqMetaStore* pMeta, int64_t key) {
       pNode = pNode->next;
     }
   }
-  return -2;
+  terrno = TSDB_CODE_TQ_META_NO_SUCH_KEY;
+  return -1;
 }
 
 int32_t tqHandleAbort(STqMetaStore* pMeta, int64_t key) {
@@ -564,12 +570,14 @@ int32_t tqHandleAbort(STqMetaStore* pMeta, int64_t key) {
         tqLinkUnpersist(pMeta, pNode);
         return 0;
       }
+      terrno = TSDB_CODE_TQ_META_KEY_NOT_IN_TXN;
       return -1;
     } else {
       pNode = pNode->next;
     }
   }
-  return -2;
+  terrno = TSDB_CODE_TQ_META_NO_SUCH_KEY;
+  return -1;
 }
 
 int32_t tqHandleDel(STqMetaStore* pMeta, int64_t key) {
@@ -588,7 +596,7 @@ int32_t tqHandleDel(STqMetaStore* pMeta, int64_t key) {
       pNode = pNode->next;
     }
   }
-  // no such key
+  terrno = TSDB_CODE_TQ_META_NO_SUCH_KEY;
   return -1;
 }
 
diff --git a/source/dnode/vnode/tq/test/tqMetaTest.cpp b/source/dnode/vnode/tq/test/tqMetaTest.cpp
index 58263efa71..d3c9b50e4a 100644
--- a/source/dnode/vnode/tq/test/tqMetaTest.cpp
+++ b/source/dnode/vnode/tq/test/tqMetaTest.cpp
@@ -10,8 +10,8 @@ struct Foo {
 };
 
 int FooSerializer(const void* pObj, STqSerializedHead** ppHead) {
-  Foo* foo = (Foo*) pObj;
-  if((*ppHead) == NULL || (*ppHead)->ssize < sizeof(STqSerializedHead) + sizeof(int32_t)) {
+  Foo* foo = (Foo*)pObj;
+  if ((*ppHead) == NULL || (*ppHead)->ssize < sizeof(STqSerializedHead) + sizeof(int32_t)) {
     *ppHead = (STqSerializedHead*)realloc(*ppHead, sizeof(STqSerializedHead) + sizeof(int32_t));
     (*ppHead)->ssize = sizeof(STqSerializedHead) + sizeof(int32_t);
   }
@@ -20,36 +20,28 @@ int FooSerializer(const void* pObj, STqSerializedHead** ppHead) {
 }
 
 const void* FooDeserializer(const STqSerializedHead* pHead, void** ppObj) {
-  if(*ppObj == NULL) {
+  if (*ppObj == NULL) {
     *ppObj = realloc(*ppObj, sizeof(int32_t));
   }
   Foo* pFoo = *(Foo**)ppObj;
-  pFoo->a = *(int32_t*)pHead->content; 
+  pFoo->a = *(int32_t*)pHead->content;
   return NULL;
 }
 
-void FooDeleter(void* pObj) {
-  free(pObj); 
-}
+void FooDeleter(void* pObj) { free(pObj); }
 
 class TqMetaUpdateAppendTest : public ::testing::Test {
-  protected:
+ protected:
+  void SetUp() override {
+    taosRemoveDir(pathName);
+    pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
+    ASSERT(pMeta);
+  }
 
-    void SetUp() override {
-      taosRemoveDir(pathName);
-      pMeta = tqStoreOpen(pathName,
-          FooSerializer, FooDeserializer, FooDeleter,
-          TQ_UPDATE_APPEND
-        );
-      ASSERT(pMeta);
-    }
+  void TearDown() override { tqStoreClose(pMeta); }
 
-    void TearDown() override {
-      tqStoreClose(pMeta);
-    }
-
-    TqMetaStore* pMeta;
-    const char* pathName = "/tmp/tq_test";
+  STqMetaStore* pMeta;
+  const char*   pathName = "/tmp/tq_test";
 };
 
 TEST_F(TqMetaUpdateAppendTest, copyPutTest) {
@@ -57,11 +49,11 @@ TEST_F(TqMetaUpdateAppendTest, copyPutTest) {
   foo.a = 3;
   tqHandleCopyPut(pMeta, 1, &foo, sizeof(Foo));
 
-  Foo* pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  Foo* pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 
   tqHandleCommit(pMeta, 1);
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo->a, 3);
 }
 
@@ -78,10 +70,7 @@ TEST_F(TqMetaUpdateAppendTest, persistTest) {
   EXPECT_EQ(pBar == NULL, true);
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
 
   pBar = (Foo*)tqHandleGet(pMeta, 1);
@@ -97,7 +86,7 @@ TEST_F(TqMetaUpdateAppendTest, uncommittedTest) {
   pFoo->a = 3;
   tqHandleMovePut(pMeta, 1, pFoo);
 
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 }
 
@@ -106,11 +95,11 @@ TEST_F(TqMetaUpdateAppendTest, abortTest) {
   pFoo->a = 3;
   tqHandleMovePut(pMeta, 1, pFoo);
 
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 
   tqHandleAbort(pMeta, 1);
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 }
 
@@ -119,32 +108,29 @@ TEST_F(TqMetaUpdateAppendTest, deleteTest) {
   pFoo->a = 3;
   tqHandleMovePut(pMeta, 1, pFoo);
 
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 
   tqHandleCommit(pMeta, 1);
 
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   ASSERT_EQ(pFoo != NULL, true);
   EXPECT_EQ(pFoo->a, 3);
 
   tqHandleDel(pMeta, 1);
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   ASSERT_EQ(pFoo != NULL, true);
   EXPECT_EQ(pFoo->a, 3);
 
   tqHandleCommit(pMeta, 1);
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
 
-  pFoo = (Foo*) tqHandleGet(pMeta, 1);
+  pFoo = (Foo*)tqHandleGet(pMeta, 1);
   EXPECT_EQ(pFoo == NULL, true);
 }
 
@@ -162,10 +148,7 @@ TEST_F(TqMetaUpdateAppendTest, intxnPersist) {
   EXPECT_EQ(pFoo1->a, 3);
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
 
   pFoo1 = (Foo*)tqHandleGet(pMeta, 1);
@@ -177,10 +160,7 @@ TEST_F(TqMetaUpdateAppendTest, intxnPersist) {
   EXPECT_EQ(pFoo1->a, 4);
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
 
   pFoo1 = (Foo*)tqHandleGet(pMeta, 1);
@@ -190,13 +170,13 @@ TEST_F(TqMetaUpdateAppendTest, intxnPersist) {
 TEST_F(TqMetaUpdateAppendTest, multiplePage) {
   srand(0);
   std::vector<int> v;
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     v.push_back(rand());
     Foo foo;
     foo.a = v[i];
     tqHandleCopyPut(pMeta, i, &foo, sizeof(Foo));
   }
-  for(int i = 0; i < 500; i++) {
+  for (int i = 0; i < 500; i++) {
     tqHandleCommit(pMeta, i);
     Foo* pFoo = (Foo*)tqHandleGet(pMeta, i);
     ASSERT_EQ(pFoo != NULL, true) << " at idx " << i << "\n";
@@ -204,38 +184,34 @@ TEST_F(TqMetaUpdateAppendTest, multiplePage) {
   }
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
-  
-  for(int i = 500; i < 1000; i++) {
+
+  for (int i = 500; i < 1000; i++) {
     tqHandleCommit(pMeta, i);
     Foo* pFoo = (Foo*)tqHandleGet(pMeta, i);
     ASSERT_EQ(pFoo != NULL, true) << " at idx " << i << "\n";
     EXPECT_EQ(pFoo->a, v[i]);
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     Foo* pFoo = (Foo*)tqHandleGet(pMeta, i);
     ASSERT_EQ(pFoo != NULL, true) << " at idx " << i << "\n";
     EXPECT_EQ(pFoo->a, v[i]);
   }
-
 }
 
 TEST_F(TqMetaUpdateAppendTest, multipleRewrite) {
   srand(0);
   std::vector<int> v;
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     v.push_back(rand());
     Foo foo;
     foo.a = v[i];
     tqHandleCopyPut(pMeta, i, &foo, sizeof(Foo));
   }
 
-  for(int i = 0; i < 500; i++) {
+  for (int i = 0; i < 500; i++) {
     tqHandleCommit(pMeta, i);
     v[i] = rand();
     Foo foo;
@@ -243,25 +219,22 @@ TEST_F(TqMetaUpdateAppendTest, multipleRewrite) {
     tqHandleCopyPut(pMeta, i, &foo, sizeof(Foo));
   }
 
-  for(int i = 500; i < 1000; i++) {
+  for (int i = 500; i < 1000; i++) {
     v[i] = rand();
     Foo foo;
     foo.a = v[i];
     tqHandleCopyPut(pMeta, i, &foo, sizeof(Foo));
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     tqHandleCommit(pMeta, i);
   }
 
   tqStoreClose(pMeta);
-  pMeta = tqStoreOpen(pathName,
-      FooSerializer, FooDeserializer, FooDeleter,
-      TQ_UPDATE_APPEND
-    );
+  pMeta = tqStoreOpen(pathName, FooSerializer, FooDeserializer, FooDeleter, TQ_UPDATE_APPEND);
   ASSERT(pMeta);
-  
-  for(int i = 500; i < 1000; i++) {
+
+  for (int i = 500; i < 1000; i++) {
     v[i] = rand();
     Foo foo;
     foo.a = v[i];
@@ -269,40 +242,38 @@ TEST_F(TqMetaUpdateAppendTest, multipleRewrite) {
     tqHandleCommit(pMeta, i);
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     Foo* pFoo = (Foo*)tqHandleGet(pMeta, i);
     ASSERT_EQ(pFoo != NULL, true) << " at idx " << i << "\n";
     EXPECT_EQ(pFoo->a, v[i]);
   }
-
 }
 
 TEST_F(TqMetaUpdateAppendTest, dupCommit) {
   srand(0);
   std::vector<int> v;
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     v.push_back(rand());
     Foo foo;
     foo.a = v[i];
     tqHandleCopyPut(pMeta, i, &foo, sizeof(Foo));
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     int ret = tqHandleCommit(pMeta, i);
     EXPECT_EQ(ret, 0);
     ret = tqHandleCommit(pMeta, i);
     EXPECT_EQ(ret, -1);
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     int ret = tqHandleCommit(pMeta, i);
     EXPECT_EQ(ret, -1);
   }
 
-  for(int i = 0; i < 1000; i++) {
+  for (int i = 0; i < 1000; i++) {
     Foo* pFoo = (Foo*)tqHandleGet(pMeta, i);
     ASSERT_EQ(pFoo != NULL, true) << " at idx " << i << "\n";
     EXPECT_EQ(pFoo->a, v[i]);
   }
-
 }
diff --git a/source/util/src/tlog.c b/source/util/src/tlog.c
index 23a923a315..5bac59f913 100644
--- a/source/util/src/tlog.c
+++ b/source/util/src/tlog.c
@@ -14,21 +14,21 @@
  */
 
 #define _DEFAULT_SOURCE
-#include "os.h"
-#include "ulog.h"
 #include "tlog.h"
+#include "os.h"
 #include "tnote.h"
 #include "tutil.h"
+#include "ulog.h"
 #include "zlib.h"
-  
-#define MAX_LOGLINE_SIZE              (1000)
-#define MAX_LOGLINE_BUFFER_SIZE       (MAX_LOGLINE_SIZE + 10)
-#define MAX_LOGLINE_CONTENT_SIZE      (MAX_LOGLINE_SIZE - 100)
-#define MAX_LOGLINE_DUMP_SIZE         (65 * 1024)
-#define MAX_LOGLINE_DUMP_BUFFER_SIZE  (MAX_LOGLINE_DUMP_SIZE + 10)
+
+#define MAX_LOGLINE_SIZE (1000)
+#define MAX_LOGLINE_BUFFER_SIZE (MAX_LOGLINE_SIZE + 10)
+#define MAX_LOGLINE_CONTENT_SIZE (MAX_LOGLINE_SIZE - 100)
+#define MAX_LOGLINE_DUMP_SIZE (65 * 1024)
+#define MAX_LOGLINE_DUMP_BUFFER_SIZE (MAX_LOGLINE_DUMP_SIZE + 10)
 #define MAX_LOGLINE_DUMP_CONTENT_SIZE (MAX_LOGLINE_DUMP_SIZE - 100)
 
-#define LOG_FILE_NAME_LEN          300
+#define LOG_FILE_NAME_LEN 300
 #define TSDB_DEFAULT_LOG_BUF_SIZE (20 * 1024 * 1024)  // 20MB
 
 #define DEFAULT_LOG_INTERVAL 25
@@ -38,13 +38,13 @@
 #define LOG_MAX_WAIT_MSEC 1000
 
 #define LOG_BUF_BUFFER(x) ((x)->buffer)
-#define LOG_BUF_START(x)  ((x)->buffStart)
-#define LOG_BUF_END(x)    ((x)->buffEnd)
-#define LOG_BUF_SIZE(x)   ((x)->buffSize)
-#define LOG_BUF_MUTEX(x)  ((x)->buffMutex)
+#define LOG_BUF_START(x) ((x)->buffStart)
+#define LOG_BUF_END(x) ((x)->buffEnd)
+#define LOG_BUF_SIZE(x) ((x)->buffSize)
+#define LOG_BUF_MUTEX(x) ((x)->buffMutex)
 
 typedef struct {
-  char *          buffer;
+  char           *buffer;
   int32_t         buffStart;
   int32_t         buffEnd;
   int32_t         buffSize;
@@ -57,18 +57,18 @@ typedef struct {
 } SLogBuff;
 
 typedef struct {
-  int32_t fileNum;
-  int32_t maxLines;
-  int32_t lines;
-  int32_t flag;
-  int32_t openInProgress;
-  pid_t   pid;
-  char    logName[LOG_FILE_NAME_LEN];
-  SLogBuff *      logHandle;
+  int32_t         fileNum;
+  int32_t         maxLines;
+  int32_t         lines;
+  int32_t         flag;
+  int32_t         openInProgress;
+  pid_t           pid;
+  char            logName[LOG_FILE_NAME_LEN];
+  SLogBuff       *logHandle;
   pthread_mutex_t logMutex;
 } SLogObj;
 
-int8_t  tscEmbeddedInUtil = 0;
+int8_t tscEmbeddedInUtil = 0;
 
 int32_t tsLogKeepDays = 0;
 int8_t  tsAsyncLog = 1;
@@ -93,19 +93,19 @@ int32_t debugFlag = 0;
 int32_t sDebugFlag = 135;
 int32_t wDebugFlag = 135;
 int32_t tsdbDebugFlag = 131;
+int32_t tqDebugFlag = 131;
 int32_t cqDebugFlag = 131;
 int32_t fsDebugFlag = 135;
 int32_t ctgDebugFlag = 131;
 
-
 int64_t dbgEmptyW = 0;
 int64_t dbgWN = 0;
 int64_t dbgSmallWN = 0;
 int64_t dbgBigWN = 0;
 int64_t dbgWSize = 0;
 
-static SLogObj   tsLogObj = { .fileNum = 1 };
-static void *    taosAsyncOutputLog(void *param);
+static SLogObj   tsLogObj = {.fileNum = 1};
+static void     *taosAsyncOutputLog(void *param);
 static int32_t   taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen);
 static SLogBuff *taosLogBuffNew(int32_t bufSize);
 static void      taosCloseLogByFd(int32_t oldFd);
@@ -139,8 +139,8 @@ static void taosStopLog() {
 
 void taosCloseLog() {
   taosStopLog();
-  //tsem_post(&(tsLogObj.logHandle->buffNotEmpty));
-  taosMsleep(MAX_LOG_INTERVAL/1000);
+  // tsem_post(&(tsLogObj.logHandle->buffNotEmpty));
+  taosMsleep(MAX_LOG_INTERVAL / 1000);
   if (taosCheckPthreadValid(tsLogObj.logHandle->asyncThread)) {
     pthread_join(tsLogObj.logHandle->asyncThread, NULL);
   }
@@ -217,7 +217,7 @@ static void *taosThreadToOpenNewFile(void *param) {
   tsLogObj.lines = 0;
   tsLogObj.openInProgress = 0;
   taosCloseLogByFd(oldFd);
-  
+
   uInfo("   new log file:%d is opened", tsLogObj.flag);
   uInfo("==================================");
   taosPrintCfg();
@@ -308,9 +308,9 @@ static void taosGetLogFileName(char *fn) {
 static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
 #ifdef WINDOWS
   /*
-  * always set maxFileNum to 1
-  * means client log filename is unique in windows
-  */
+   * always set maxFileNum to 1
+   * means client log filename is unique in windows
+   */
   maxFileNum = 1;
 #endif
 
@@ -381,13 +381,14 @@ static int32_t taosOpenLogFile(char *fn, int32_t maxLines, int32_t maxFileNum) {
 
 void taosPrintLog(const char *flags, int32_t dflag, const char *format, ...) {
   if (tsTotalLogDirGB != 0 && tsAvailLogDirGB < tsMinimalLogDirGB) {
-    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop print log.\n", tsLogDir, tsAvailLogDirGB, tsTotalLogDirGB);
+    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop print log.\n", tsLogDir, tsAvailLogDirGB,
+           tsTotalLogDirGB);
     fflush(stdout);
     return;
   }
 
   va_list        argpointer;
-  char           buffer[MAX_LOGLINE_BUFFER_SIZE] = { 0 };
+  char           buffer[MAX_LOGLINE_BUFFER_SIZE] = {0};
   int32_t        len;
   struct tm      Tm, *ptm;
   struct timeval timeSecs;
@@ -434,20 +435,20 @@ void taosPrintLog(const char *flags, int32_t dflag, const char *format, ...) {
     }
   }
 
-  if (dflag & DEBUG_SCREEN)
-      taosWriteFile(1, buffer, (uint32_t)len);
+  if (dflag & DEBUG_SCREEN) taosWriteFile(1, buffer, (uint32_t)len);
   if (dflag == 255) nInfo(buffer, len);
 }
 
 void taosDumpData(unsigned char *msg, int32_t len) {
   if (tsTotalLogDirGB != 0 && tsAvailLogDirGB < tsMinimalLogDirGB) {
-    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop dump log.\n", tsLogDir, tsAvailLogDirGB, tsTotalLogDirGB);
+    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop dump log.\n", tsLogDir, tsAvailLogDirGB,
+           tsTotalLogDirGB);
     fflush(stdout);
     return;
   }
 
-  char temp[256];
-  int32_t  i, pos = 0, c = 0;
+  char    temp[256];
+  int32_t i, pos = 0, c = 0;
 
   for (i = 0; i < len; ++i) {
     sprintf(temp + pos, "%02x ", msg[i]);
@@ -468,7 +469,8 @@ void taosDumpData(unsigned char *msg, int32_t len) {
 
 void taosPrintLongString(const char *flags, int32_t dflag, const char *format, ...) {
   if (tsTotalLogDirGB != 0 && tsAvailLogDirGB < tsMinimalLogDirGB) {
-    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop write log.\n", tsLogDir, tsAvailLogDirGB, tsTotalLogDirGB);
+    printf("server disk:%s space remain %.3f GB, total %.1f GB, stop write log.\n", tsLogDir, tsAvailLogDirGB,
+           tsTotalLogDirGB);
     fflush(stdout);
     return;
   }
@@ -503,7 +505,7 @@ void taosPrintLongString(const char *flags, int32_t dflag, const char *format, .
     } else {
       taosWriteFile(tsLogObj.logHandle->fd, buffer, len);
     }
-    
+
     if (tsLogObj.maxLines > 0) {
       atomic_add_fetch_32(&tsLogObj.lines, 1);
 
@@ -542,7 +544,7 @@ static SLogBuff *taosLogBuffNew(int32_t bufSize) {
   tLogBuff->stop = 0;
 
   if (pthread_mutex_init(&LOG_BUF_MUTEX(tLogBuff), NULL) < 0) goto _err;
-  //tsem_init(&(tLogBuff->buffNotEmpty), 0, 0);
+  // tsem_init(&(tLogBuff->buffNotEmpty), 0, 0);
 
   return tLogBuff;
 
@@ -576,12 +578,12 @@ static void taosCopyLogBuffer(SLogBuff *tLogBuff, int32_t start, int32_t end, ch
 }
 
 static int32_t taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen) {
-  int32_t start = 0;
-  int32_t end = 0;
-  int32_t remainSize = 0;
+  int32_t        start = 0;
+  int32_t        end = 0;
+  int32_t        remainSize = 0;
   static int64_t lostLine = 0;
-  char tmpBuf[40] = {0};
-  int32_t tmpBufLen = 0;
+  char           tmpBuf[40] = {0};
+  int32_t        tmpBufLen = 0;
 
   if (tLogBuff == NULL || tLogBuff->stop) return -1;
 
@@ -592,7 +594,7 @@ static int32_t taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen)
   remainSize = (start > end) ? (start - end - 1) : (start + LOG_BUF_SIZE(tLogBuff) - end - 1);
 
   if (lostLine > 0) {
-    sprintf(tmpBuf, "...Lost %"PRId64" lines here...\n", lostLine);
+    sprintf(tmpBuf, "...Lost %" PRId64 " lines here...\n", lostLine);
     tmpBufLen = (int32_t)strlen(tmpBuf);
   }
 
@@ -610,7 +612,7 @@ static int32_t taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen)
 
   taosCopyLogBuffer(tLogBuff, LOG_BUF_START(tLogBuff), LOG_BUF_END(tLogBuff), msg, msgLen);
 
-  //int32_t w = atomic_sub_fetch_32(&waitLock, 1);
+  // int32_t w = atomic_sub_fetch_32(&waitLock, 1);
   /*
   if (w <= 0 || ((remainSize - msgLen - tmpBufLen) < (LOG_BUF_SIZE(tLogBuff) * 4 /5))) {
     tsem_post(&(tLogBuff->buffNotEmpty));
@@ -622,7 +624,6 @@ static int32_t taosPushLogBuffer(SLogBuff *tLogBuff, char *msg, int32_t msgLen)
 
   pthread_mutex_unlock(&LOG_BUF_MUTEX(tLogBuff));
 
-
   return 0;
 }
 
@@ -634,9 +635,9 @@ static int32_t taosGetLogRemainSize(SLogBuff *tLogBuff, int32_t start, int32_t e
 
 static void taosWriteLog(SLogBuff *tLogBuff) {
   static int32_t lastDuration = 0;
-  int32_t remainChecked = 0;
-  int32_t start, end, pollSize;
-  
+  int32_t        remainChecked = 0;
+  int32_t        start, end, pollSize;
+
   do {
     if (remainChecked == 0) {
       start = LOG_BUF_START(tLogBuff);
@@ -662,24 +663,24 @@ static void taosWriteLog(SLogBuff *tLogBuff) {
     if (start < end) {
       taosWriteFile(tLogBuff->fd, LOG_BUF_BUFFER(tLogBuff) + start, pollSize);
     } else {
-        int32_t tsize = LOG_BUF_SIZE(tLogBuff) - start;
-        taosWriteFile(tLogBuff->fd, LOG_BUF_BUFFER(tLogBuff) + start, tsize);
+      int32_t tsize = LOG_BUF_SIZE(tLogBuff) - start;
+      taosWriteFile(tLogBuff->fd, LOG_BUF_BUFFER(tLogBuff) + start, tsize);
 
-        taosWriteFile(tLogBuff->fd, LOG_BUF_BUFFER(tLogBuff), end);
+      taosWriteFile(tLogBuff->fd, LOG_BUF_BUFFER(tLogBuff), end);
     }
 
     dbgWN++;
-    dbgWSize+=pollSize;
-    
+    dbgWSize += pollSize;
+
     if (pollSize < tLogBuff->minBuffSize) {
       dbgSmallWN++;
       if (writeInterval < MAX_LOG_INTERVAL) {
         writeInterval += LOG_INTERVAL_STEP;
       }
-    } else if (pollSize >  LOG_BUF_SIZE(tLogBuff)/3) {
+    } else if (pollSize > LOG_BUF_SIZE(tLogBuff) / 3) {
       dbgBigWN++;
       writeInterval = MIN_LOG_INTERVAL;
-    } else if (pollSize > LOG_BUF_SIZE(tLogBuff)/4) {
+    } else if (pollSize > LOG_BUF_SIZE(tLogBuff) / 4) {
       if (writeInterval > MIN_LOG_INTERVAL) {
         writeInterval -= LOG_INTERVAL_STEP;
       }
@@ -698,13 +699,13 @@ static void taosWriteLog(SLogBuff *tLogBuff) {
     writeInterval = MIN_LOG_INTERVAL;
 
     remainChecked = 1;
-  }while (1);
+  } while (1);
 }
 
 static void *taosAsyncOutputLog(void *param) {
   SLogBuff *tLogBuff = (SLogBuff *)param;
   setThreadName("log");
-  
+
   while (1) {
     taosMsleep(writeInterval);
 
@@ -721,8 +722,8 @@ int32_t taosCompressFile(char *srcFileName, char *destFileName) {
   int32_t compressSize = 163840;
   int32_t ret = 0;
   int32_t len = 0;
-  char *  data = malloc(compressSize);
-  FILE *  srcFp = NULL;
+  char   *data = malloc(compressSize);
+  FILE   *srcFp = NULL;
   gzFile  dstFp = NULL;
 
   srcFp = fopen(srcFileName, "r");