diff --git a/examples/c/tmq.c b/examples/c/tmq.c
index 697a53e5708834503da4bf405cc799ca1a5cd4aa..89be847f8e1dc34d09871aa7de279b7749127efb 100644
--- a/examples/c/tmq.c
+++ b/examples/c/tmq.c
@@ -18,6 +18,7 @@
 #include <string.h>
 #include <time.h>
 #include "taos.h"
+#include <stdlib.h>
 
 static int  running = 1;
 static void msg_process(TAOS_RES* msg) {
@@ -30,7 +31,11 @@ static void msg_process(TAOS_RES* msg) {
     void*   meta;
     int32_t metaLen;
     tmq_get_raw_meta(msg, &meta, &metaLen);
-
+    char* result = tmq_get_json_meta(msg);
+    if(result){
+      printf("meta result: %s\n", result);
+      free(result);
+    }
     printf("meta, len is %d\n", metaLen);
     return;
   }
@@ -119,6 +124,104 @@ int32_t init_env() {
   }
   taos_free_result(pRes);
 
+  pRes = taos_query(pConn, "alter table st1 add column c4 bigint");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table st1 modify column c3 binary(64)");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table st1 add tag t2 binary(64)");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter super table st1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table ct3 set tag t1=5000");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to slter child table ct3, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "drop table ct3 ct1");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to drop child table ct3, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "drop table st1");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to drop super table st1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "create table if not exists n1(ts timestamp, c1 int, c2 nchar(4))");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to create normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table n1 add column c3 bigint");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table n1 modify column c2 nchar(8)");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table n1 rename column c3 cc3");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "alter table n1 drop column c1");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to alter normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "drop table n1");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to drop normal table n1, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "create table jt(ts timestamp, i int) tags(t json)");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
+  pRes = taos_query(pConn, "create table jt1 using jt tags('{\"k1\":1, \"k2\":\"hello\"}')");
+  if (taos_errno(pRes) != 0) {
+    printf("failed to create super table jt, reason:%s\n", taos_errstr(pRes));
+    return -1;
+  }
+  taos_free_result(pRes);
+
   return 0;
 }
 
@@ -137,8 +240,8 @@ int32_t create_topic() {
   }
   taos_free_result(pRes);
 
-  /*pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1");*/
-  pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1");
+  pRes = taos_query(pConn, "create topic topic_ctb_column with meta as database abc1");
+//  pRes = taos_query(pConn, "create topic topic_ctb_column as select ts, c1, c2, c3 from st1");
   if (taos_errno(pRes) != 0) {
     printf("failed to create topic topic_ctb_column, reason:%s\n", taos_errstr(pRes));
     return -1;
@@ -199,7 +302,7 @@ tmq_t* build_consumer() {
   tmq_conf_set(conf, "msg.with.table.name", "true");
   tmq_conf_set(conf, "enable.auto.commit", "true");
 
-  tmq_conf_set(conf, "experimental.snapshot.enable", "true");
+  tmq_conf_set(conf, "experimental.snapshot.enable", "false");
 
   tmq_conf_set_auto_commit_cb(conf, tmq_commit_cb_print, NULL);
   tmq_t* tmq = tmq_consumer_new(conf, NULL, 0);
diff --git a/include/client/taos.h b/include/client/taos.h
index 79f567fc9a928a4e6622784c239ff77fd62334b9..216a5832b0e72be033289788dfb1e938d81b5423 100644
--- a/include/client/taos.h
+++ b/include/client/taos.h
@@ -263,6 +263,8 @@ typedef enum tmq_res_t tmq_res_t;
 
 DLL_EXPORT tmq_res_t   tmq_get_res_type(TAOS_RES *res);
 DLL_EXPORT int32_t     tmq_get_raw_meta(TAOS_RES *res, void **raw_meta, int32_t *raw_meta_len);
+DLL_EXPORT int32_t     taos_write_raw_meta(TAOS *res, void *raw_meta, int32_t raw_meta_len);
+DLL_EXPORT char       *tmq_get_json_meta(TAOS_RES *res);   // Returning null means error. Returned result need to be freed.
 DLL_EXPORT const char *tmq_get_topic_name(TAOS_RES *res);
 DLL_EXPORT const char *tmq_get_db_name(TAOS_RES *res);
 DLL_EXPORT int32_t     tmq_get_vgroup_id(TAOS_RES *res);
diff --git a/include/common/tmsgdef.h b/include/common/tmsgdef.h
index 806c0b51225ee1b7b3228a12aa3955d35adeb1bd..8b39530e84dd02f876c3fc4c567a94b66b3ca7b7 100644
--- a/include/common/tmsgdef.h
+++ b/include/common/tmsgdef.h
@@ -209,6 +209,7 @@ enum {
   TD_DEF_MSG_TYPE(TDMT_SCH_QUERY_CONTINUE, "query-continue", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_SCH_QUERY_HEARTBEAT, "query-heartbeat", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_SCH_FETCH, "fetch", NULL, NULL)
+  TD_DEF_MSG_TYPE(TDMT_SCH_MERGE_FETCH, "merge-fetch", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_SCH_CANCEL_TASK, "cancel-task", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_SCH_DROP_TASK, "drop-task", NULL, NULL)
   TD_DEF_MSG_TYPE(TDMT_SCH_EXPLAIN, "explain", NULL, NULL)
diff --git a/include/libs/nodes/plannodes.h b/include/libs/nodes/plannodes.h
index d3e984098776f71ac47662db27a1815793938ad6..6a865b4e2a01b6bab882caf1ea810786bc7aca44 100644
--- a/include/libs/nodes/plannodes.h
+++ b/include/libs/nodes/plannodes.h
@@ -353,6 +353,7 @@ typedef struct SDownstreamSourceNode {
   uint64_t       taskId;
   uint64_t       schedId;
   int32_t        execId;
+  int32_t        fetchMsgType;
 } SDownstreamSourceNode;
 
 typedef struct SExchangePhysiNode {
diff --git a/source/client/src/clientEnv.c b/source/client/src/clientEnv.c
index 797d58e6ef0d3b07b6c2ef7506e5ff358f793ad8..89ecf16b4085c9a53f30a60af3870bb8d5230a51 100644
--- a/source/client/src/clientEnv.c
+++ b/source/client/src/clientEnv.c
@@ -102,7 +102,7 @@ void closeTransporter(SAppInstInfo *pAppInfo) {
 
 static bool clientRpcRfp(int32_t code, tmsg_t msgType) {
   if (NEED_REDIRECT_ERROR(code)) {
-    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH) {
+    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH || msgType == TDMT_SCH_MERGE_FETCH) {
       return false;
     }
     return true;
diff --git a/source/client/src/tmq.c b/source/client/src/tmq.c
index 667f5b1dbc98140c67482ce2b6461886b86569e3..1475663a05e4017a6f2cc28988cf4527c62e8d2c 100644
--- a/source/client/src/tmq.c
+++ b/source/client/src/tmq.c
@@ -23,6 +23,7 @@
 #include "tqueue.h"
 #include "tref.h"
 #include "ttimer.h"
+#include "cJSON.h"
 
 int32_t tmqAskEp(tmq_t* tmq, bool async);
 
@@ -1683,7 +1684,8 @@ void* tmqHandleAllRsp(tmq_t* tmq, int64_t timeout, bool pollIfReset) {
       if (pollRspWrapper->metaRsp.head.epoch == consumerEpoch) {
         SMqClientVg* pVg = pollRspWrapper->vgHandle;
         /*printf("vg %d offset %ld up to %ld\n", pVg->vgId, pVg->currentOffset, rspMsg->msg.rspOffset);*/
-        pVg->currentOffsetNew = pollRspWrapper->metaRsp.rspOffsetNew;
+        pVg->currentOffsetNew.version = pollRspWrapper->metaRsp.rspOffset;
+        pVg->currentOffsetNew.type = TMQ_OFFSET__LOG;
         atomic_store_32(&pVg->vgStatus, TMQ_VG_STATUS__IDLE);
         // build rsp
         SMqMetaRspObj* pRsp = tmqBuildMetaRspFromWrapper(pollRspWrapper);
@@ -1848,6 +1850,406 @@ int32_t tmq_get_raw_meta(TAOS_RES* res, void** raw_meta, int32_t* raw_meta_len)
   return -1;
 }
 
+static char *buildCreateTableJson(SSchemaWrapper *schemaRow, SSchemaWrapper* schemaTag, char* name, int64_t id, int8_t t){
+  char*  string = NULL;
+  cJSON* json = cJSON_CreateObject();
+  if (json == NULL) {
+    return string;
+  }
+  cJSON* type = cJSON_CreateString("create");
+  cJSON_AddItemToObject(json, "type", type);
+
+  char uid[32] = {0};
+  sprintf(uid, "%"PRIi64, id);
+  cJSON* id_ = cJSON_CreateString(uid);
+  cJSON_AddItemToObject(json, "id", id_);
+  cJSON* tableName = cJSON_CreateString(name);
+  cJSON_AddItemToObject(json, "tableName", tableName);
+  cJSON* tableType = cJSON_CreateString(t == TSDB_NORMAL_TABLE ? "normal" : "super");
+  cJSON_AddItemToObject(json, "tableType", tableType);
+//  cJSON* version = cJSON_CreateNumber(1);
+//  cJSON_AddItemToObject(json, "version", version);
+
+  cJSON* columns = cJSON_CreateArray();
+  for(int i = 0; i < schemaRow->nCols; i++){
+    cJSON* column = cJSON_CreateObject();
+    SSchema *s = schemaRow->pSchema + i;
+    cJSON* cname = cJSON_CreateString(s->name);
+    cJSON_AddItemToObject(column, "name", cname);
+    cJSON* ctype = cJSON_CreateNumber(s->type);
+    cJSON_AddItemToObject(column, "type", ctype);
+    if(s->type == TSDB_DATA_TYPE_BINARY){
+      int32_t length = s->bytes - VARSTR_HEADER_SIZE;
+      cJSON* cbytes = cJSON_CreateNumber(length);
+      cJSON_AddItemToObject(column, "length", cbytes);
+    }else if (s->type == TSDB_DATA_TYPE_NCHAR){
+      int32_t length = (s->bytes - VARSTR_HEADER_SIZE)/TSDB_NCHAR_SIZE;
+      cJSON* cbytes = cJSON_CreateNumber(length);
+      cJSON_AddItemToObject(column, "length", cbytes);
+    }
+    cJSON_AddItemToArray(columns, column);
+  }
+  cJSON_AddItemToObject(json, "columns", columns);
+
+  cJSON* tags = cJSON_CreateArray();
+  for(int i = 0; schemaTag && i < schemaTag->nCols; i++){
+    cJSON* tag = cJSON_CreateObject();
+    SSchema *s = schemaTag->pSchema + i;
+    cJSON* tname = cJSON_CreateString(s->name);
+    cJSON_AddItemToObject(tag, "name", tname);
+    cJSON* ttype = cJSON_CreateNumber(s->type);
+    cJSON_AddItemToObject(tag, "type", ttype);
+    if(s->type == TSDB_DATA_TYPE_BINARY){
+      int32_t length = s->bytes - VARSTR_HEADER_SIZE;
+      cJSON* cbytes = cJSON_CreateNumber(length);
+      cJSON_AddItemToObject(tag, "length", cbytes);
+    }else if (s->type == TSDB_DATA_TYPE_NCHAR){
+      int32_t length = (s->bytes - VARSTR_HEADER_SIZE)/TSDB_NCHAR_SIZE;
+      cJSON* cbytes = cJSON_CreateNumber(length);
+      cJSON_AddItemToObject(tag, "length", cbytes);
+    }
+    cJSON_AddItemToArray(tags, tag);
+  }
+  cJSON_AddItemToObject(json, "tags", tags);
+
+  string = cJSON_PrintUnformatted(json);
+  cJSON_Delete(json);
+  return string;
+}
+
+static char *processCreateStb(SMqMetaRsp *metaRsp){
+  SVCreateStbReq req = {0};
+  SDecoder       coder;
+  char*  string = NULL;
+
+  // decode and process req
+  void* data = POINTER_SHIFT(metaRsp->metaRsp, sizeof(SMsgHead));
+  int32_t len = metaRsp->metaRspLen - sizeof(SMsgHead);
+  tDecoderInit(&coder, data, len);
+
+  if (tDecodeSVCreateStbReq(&coder, &req) < 0) {
+    goto _err;
+  }
+  string = buildCreateTableJson(&req.schemaRow, &req.schemaTag, req.name, req.suid, TSDB_SUPER_TABLE);
+  tDecoderClear(&coder);
+  return string;
+
+_err:
+  tDecoderClear(&coder);
+  return string;
+}
+
+static char *buildCreateCTableJson(STag* pTag, int64_t sid, char* name, int64_t id){
+  char*  string = NULL;
+  cJSON* json = cJSON_CreateObject();
+  if (json == NULL) {
+    return string;
+  }
+  cJSON* type = cJSON_CreateString("create");
+  cJSON_AddItemToObject(json, "type", type);
+  char cid[32] = {0};
+  sprintf(cid, "%"PRIi64, id);
+  cJSON* cid_ = cJSON_CreateString(cid);
+  cJSON_AddItemToObject(json, "id", cid_);
+
+  cJSON* tableName = cJSON_CreateString(name);
+  cJSON_AddItemToObject(json, "tableName", tableName);
+  cJSON* tableType = cJSON_CreateString("child");
+  cJSON_AddItemToObject(json, "tableType", tableType);
+
+  char sid_[32] = {0};
+  sprintf(sid_, "%"PRIi64, sid);
+  cJSON* using = cJSON_CreateString(sid_);
+  cJSON_AddItemToObject(json, "using", using);
+//  cJSON* version = cJSON_CreateNumber(1);
+//  cJSON_AddItemToObject(json, "version", version);
+
+  cJSON* tags = cJSON_CreateArray();
+
+  if (tTagIsJson(pTag)) {   // todo
+    char* pJson = parseTagDatatoJson(pTag);
+
+    cJSON* tag = cJSON_CreateObject();
+    cJSON* tname = cJSON_CreateString("unknown");                 // todo
+    cJSON_AddItemToObject(tag, "name", tname);
+    cJSON* ttype = cJSON_CreateNumber(TSDB_DATA_TYPE_JSON);
+    cJSON_AddItemToObject(tag, "type", ttype);
+    cJSON* tvalue = cJSON_CreateString(pJson);
+    cJSON_AddItemToObject(tag, "value", tvalue);
+    cJSON_AddItemToArray(tags, tag);
+    cJSON_AddItemToObject(json, "tags", tags);
+
+    string = cJSON_PrintUnformatted(json);
+    goto end;
+  }
+
+  SArray* pTagVals = NULL;
+  int32_t code = tTagToValArray(pTag, &pTagVals);
+  if (code) {
+    goto end;
+  }
+
+  for(int i = 0; i < taosArrayGetSize(pTagVals); i++){
+    STagVal* pTagVal = (STagVal*)taosArrayGet(pTagVals, i);
+
+    cJSON* tag = cJSON_CreateObject();
+//    cJSON* tname = cJSON_CreateNumber(pTagVal->cid);
+    cJSON* tname = cJSON_CreateString("unkonwn");    // todo
+    cJSON_AddItemToObject(tag, "name", tname);
+    cJSON* ttype = cJSON_CreateNumber(pTagVal->type);
+    cJSON_AddItemToObject(tag, "type", ttype);
+
+    char* buf = NULL;
+    if (IS_VAR_DATA_TYPE(pTagVal->type)) {
+      buf = taosMemoryCalloc(pTagVal->nData + 1, 1);
+      dataConverToStr(buf, pTagVal->type, pTagVal->pData, pTagVal->nData, NULL);
+    } else {
+      buf = taosMemoryCalloc(32, 1);
+      dataConverToStr(buf, pTagVal->type, &pTagVal->i64, tDataTypes[pTagVal->type].bytes, NULL);
+    }
+
+    cJSON* tvalue = cJSON_CreateString(buf);
+    taosMemoryFree(buf);
+    cJSON_AddItemToObject(tag, "value", tvalue);
+    cJSON_AddItemToArray(tags, tag);
+  }
+  cJSON_AddItemToObject(json, "tags", tags);
+  string = cJSON_PrintUnformatted(json);
+
+end:
+
+  cJSON_Delete(json);
+  return string;
+}
+
+static char *processCreateTable(SMqMetaRsp *metaRsp){
+  SDecoder           decoder = {0};
+  SVCreateTbBatchReq req = {0};
+  SVCreateTbReq     *pCreateReq;
+  char              *string = NULL;
+  // decode
+  void* data = POINTER_SHIFT(metaRsp->metaRsp, sizeof(SMsgHead));
+  int32_t len = metaRsp->metaRspLen - sizeof(SMsgHead);
+  tDecoderInit(&decoder, data, len);
+  if (tDecodeSVCreateTbBatchReq(&decoder, &req) < 0) {
+    goto _exit;
+  }
+
+  // loop to create table
+  for (int32_t iReq = 0; iReq < req.nReqs; iReq++) {
+    pCreateReq = req.pReqs + iReq;
+    if(pCreateReq->type == TSDB_CHILD_TABLE){
+      string = buildCreateCTableJson((STag*)pCreateReq->ctb.pTag, pCreateReq->ctb.suid, pCreateReq->name, pCreateReq->uid);
+    }else if(pCreateReq->type == TSDB_NORMAL_TABLE){
+      string = buildCreateTableJson(&pCreateReq->ntb.schemaRow, NULL, pCreateReq->name, pCreateReq->uid, TSDB_NORMAL_TABLE);
+    }
+  }
+
+  tDecoderClear(&decoder);
+
+  _exit:
+  tDecoderClear(&decoder);
+  return string;
+}
+
+static char *processAlterTable(SMqMetaRsp *metaRsp){
+  SDecoder           decoder = {0};
+  SVAlterTbReq       vAlterTbReq = {0};
+  char              *string = NULL;
+
+  // decode
+  void* data = POINTER_SHIFT(metaRsp->metaRsp, sizeof(SMsgHead));
+  int32_t len = metaRsp->metaRspLen - sizeof(SMsgHead);
+  tDecoderInit(&decoder, data, len);
+  if (tDecodeSVAlterTbReq(&decoder, &vAlterTbReq) < 0) {
+    goto _exit;
+  }
+
+  cJSON* json = cJSON_CreateObject();
+  if (json == NULL) {
+    goto _exit;
+  }
+  cJSON* type = cJSON_CreateString("alter");
+  cJSON_AddItemToObject(json, "type", type);
+//  cJSON* uid = cJSON_CreateNumber(id);
+//  cJSON_AddItemToObject(json, "uid", uid);
+  cJSON* tableName = cJSON_CreateString(vAlterTbReq.tbName);
+  cJSON_AddItemToObject(json, "tableName", tableName);
+  cJSON* tableType = cJSON_CreateString(vAlterTbReq.action == TSDB_ALTER_TABLE_UPDATE_TAG_VAL ? "child" : "normal");
+  cJSON_AddItemToObject(json, "tableType", tableType);
+
+  switch (vAlterTbReq.action) {
+    case TSDB_ALTER_TABLE_ADD_COLUMN: {
+      cJSON* alterType = cJSON_CreateNumber(TSDB_ALTER_TABLE_ADD_COLUMN);
+      cJSON_AddItemToObject(json, "alterType", alterType);
+      cJSON* colName = cJSON_CreateString(vAlterTbReq.colName);
+      cJSON_AddItemToObject(json, "colName", colName);
+      cJSON* colType = cJSON_CreateNumber(vAlterTbReq.type);
+      cJSON_AddItemToObject(json, "colType", colType);
+
+      if(vAlterTbReq.type == TSDB_DATA_TYPE_BINARY){
+        int32_t length = vAlterTbReq.bytes - VARSTR_HEADER_SIZE;
+        cJSON* cbytes = cJSON_CreateNumber(length);
+        cJSON_AddItemToObject(json, "colLength", cbytes);
+      }else if (vAlterTbReq.type == TSDB_DATA_TYPE_NCHAR){
+        int32_t length = (vAlterTbReq.bytes - VARSTR_HEADER_SIZE)/TSDB_NCHAR_SIZE;
+        cJSON* cbytes = cJSON_CreateNumber(length);
+        cJSON_AddItemToObject(json, "colLength", cbytes);
+      }
+      break;
+    }
+    case TSDB_ALTER_TABLE_DROP_COLUMN:{
+      cJSON* alterType = cJSON_CreateNumber(TSDB_ALTER_TABLE_DROP_COLUMN);
+      cJSON_AddItemToObject(json, "alterType", alterType);
+      cJSON* colName = cJSON_CreateString(vAlterTbReq.colName);
+      cJSON_AddItemToObject(json, "colName", colName);
+      break;
+    }
+    case TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES:{
+      cJSON* alterType = cJSON_CreateNumber(TSDB_ALTER_TABLE_UPDATE_COLUMN_BYTES);
+      cJSON_AddItemToObject(json, "alterType", alterType);
+      cJSON* colName = cJSON_CreateString(vAlterTbReq.colName);
+      cJSON_AddItemToObject(json, "colName", colName);
+      cJSON* colType = cJSON_CreateNumber(vAlterTbReq.type);
+      cJSON_AddItemToObject(json, "colType", colType);
+      if(vAlterTbReq.type == TSDB_DATA_TYPE_BINARY){
+        int32_t length = vAlterTbReq.bytes - VARSTR_HEADER_SIZE;
+        cJSON* cbytes = cJSON_CreateNumber(length);
+        cJSON_AddItemToObject(json, "colLength", cbytes);
+      }else if (vAlterTbReq.type == TSDB_DATA_TYPE_NCHAR){
+        int32_t length = (vAlterTbReq.bytes - VARSTR_HEADER_SIZE)/TSDB_NCHAR_SIZE;
+        cJSON* cbytes = cJSON_CreateNumber(length);
+        cJSON_AddItemToObject(json, "colLength", cbytes);
+      }
+      break;
+    }
+    case TSDB_ALTER_TABLE_UPDATE_COLUMN_NAME:{
+      cJSON* alterType = cJSON_CreateNumber(TSDB_ALTER_TABLE_UPDATE_COLUMN_NAME);
+      cJSON_AddItemToObject(json, "alterType", alterType);
+      cJSON* colName = cJSON_CreateString(vAlterTbReq.colName);
+      cJSON_AddItemToObject(json, "colName", colName);
+      cJSON* colNewName = cJSON_CreateString(vAlterTbReq.colNewName);
+      cJSON_AddItemToObject(json, "colNewName", colNewName);
+      break;
+    }
+    case TSDB_ALTER_TABLE_UPDATE_TAG_VAL:{
+      cJSON* alterType = cJSON_CreateNumber(TSDB_ALTER_TABLE_UPDATE_TAG_VAL);
+      cJSON_AddItemToObject(json, "alterType", alterType);
+      cJSON* tagName = cJSON_CreateString(vAlterTbReq.tagName);
+      cJSON_AddItemToObject(json, "colName", tagName);
+      cJSON* colValue = cJSON_CreateString("invalid, todo");   // todo
+      cJSON_AddItemToObject(json, "colValue", colValue);
+      cJSON* isNull = cJSON_CreateBool(vAlterTbReq.isNull);
+      cJSON_AddItemToObject(json, "colValueNull", isNull);
+      break;
+    }
+    default:
+      break;
+  }
+  string = cJSON_PrintUnformatted(json);
+
+  _exit:
+  tDecoderClear(&decoder);
+  return string;
+}
+
+static char *processDropSTable(SMqMetaRsp *metaRsp){
+  SDecoder           decoder = {0};
+  SVDropStbReq       req = {0};
+  char              *string = NULL;
+
+  // decode
+  void* data = POINTER_SHIFT(metaRsp->metaRsp, sizeof(SMsgHead));
+  int32_t len = metaRsp->metaRspLen - sizeof(SMsgHead);
+  tDecoderInit(&decoder, data, len);
+  if (tDecodeSVDropStbReq(&decoder, &req) < 0) {
+    goto _exit;
+  }
+
+  cJSON* json = cJSON_CreateObject();
+  if (json == NULL) {
+    goto _exit;
+  }
+  cJSON* type = cJSON_CreateString("drop");
+  cJSON_AddItemToObject(json, "type", type);
+  char uid[32] = {0};
+  sprintf(uid, "%"PRIi64, req.suid);
+  cJSON* id = cJSON_CreateString(uid);
+  cJSON_AddItemToObject(json, "id", id);
+  cJSON* tableName = cJSON_CreateString(req.name);
+  cJSON_AddItemToObject(json, "tableName", tableName);
+  cJSON* tableType = cJSON_CreateString("super");
+  cJSON_AddItemToObject(json, "tableType", tableType);
+
+  string = cJSON_PrintUnformatted(json);
+
+  _exit:
+  tDecoderClear(&decoder);
+  return string;
+}
+
+static char *processDropTable(SMqMetaRsp *metaRsp){
+  SDecoder           decoder = {0};
+  SVDropTbBatchReq   req = {0};
+  char              *string = NULL;
+
+  // decode
+  void* data = POINTER_SHIFT(metaRsp->metaRsp, sizeof(SMsgHead));
+  int32_t len = metaRsp->metaRspLen - sizeof(SMsgHead);
+  tDecoderInit(&decoder, data, len);
+  if (tDecodeSVDropTbBatchReq(&decoder, &req) < 0) {
+    goto _exit;
+  }
+
+  cJSON* json = cJSON_CreateObject();
+  if (json == NULL) {
+    goto _exit;
+  }
+  cJSON* type = cJSON_CreateString("drop");
+  cJSON_AddItemToObject(json, "type", type);
+//  cJSON* uid = cJSON_CreateNumber(id);
+//  cJSON_AddItemToObject(json, "uid", uid);
+//  cJSON* tableType = cJSON_CreateString("normal");
+//  cJSON_AddItemToObject(json, "tableType", tableType);
+
+  cJSON* tableNameList = cJSON_CreateArray();
+  for (int32_t iReq = 0; iReq < req.nReqs; iReq++) {
+    SVDropTbReq* pDropTbReq = req.pReqs + iReq;
+
+    cJSON* tableName = cJSON_CreateString(pDropTbReq->name);   // todo
+    cJSON_AddItemToArray(tableNameList, tableName);
+  }
+  cJSON_AddItemToObject(json, "tableNameList", tableNameList);
+
+  string = cJSON_PrintUnformatted(json);
+
+  _exit:
+  tDecoderClear(&decoder);
+  return string;
+}
+
+char *tmq_get_json_meta(TAOS_RES *res){
+  if (!TD_RES_TMQ_META(res)) {
+    return NULL;
+  }
+
+  SMqMetaRspObj* pMetaRspObj = (SMqMetaRspObj*)res;
+  if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_CREATE_STB){
+    return processCreateStb(&pMetaRspObj->metaRsp);
+  }else if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_ALTER_STB){
+    return processCreateStb(&pMetaRspObj->metaRsp);
+  }else if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_DROP_STB){
+    return processDropSTable(&pMetaRspObj->metaRsp);
+  }else if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_CREATE_TABLE){
+    return processCreateTable(&pMetaRspObj->metaRsp);
+  }else if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_ALTER_TABLE){
+    return processAlterTable(&pMetaRspObj->metaRsp);
+  }else if(pMetaRspObj->metaRsp.resMsgType == TDMT_VND_DROP_TABLE){
+    return processDropTable(&pMetaRspObj->metaRsp);
+  }
+  return NULL;
+}
+
 void tmq_commit_async(tmq_t* tmq, const TAOS_RES* msg, tmq_commit_cb* cb, void* param) {
   tmqCommitInner2(tmq, msg, 0, 1, cb, param);
 }
diff --git a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
index 59d68b2110cfd002a9bb02658df344a872db27b7..d60b69daba8170ff2a8c691819532e3361229cac 100644
--- a/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
+++ b/source/dnode/mgmt/mgmt_mnode/src/mmHandle.c
@@ -214,6 +214,7 @@ SArray *mmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_SCH_QUERY_CONTINUE, mmPutMsgToQueryQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_QUERY_HEARTBEAT, mmPutMsgToFetchQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_FETCH, mmPutMsgToFetchQueue, 1) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SCH_MERGE_FETCH, mmPutMsgToFetchQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_CREATE_STB_RSP, mmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_ALTER_STB_RSP, mmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_DROP_STB_RSP, mmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
diff --git a/source/dnode/mgmt/mgmt_qnode/src/qmHandle.c b/source/dnode/mgmt/mgmt_qnode/src/qmHandle.c
index 1f22eefddfca54308f3fe3a8732f2cdbb644603e..14cb1bd533416c96ef16b39c2fbb53a15883bcbf 100644
--- a/source/dnode/mgmt/mgmt_qnode/src/qmHandle.c
+++ b/source/dnode/mgmt/mgmt_qnode/src/qmHandle.c
@@ -111,6 +111,7 @@ SArray *qmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_SCH_MERGE_QUERY, qmPutNodeMsgToQueryQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_QUERY_CONTINUE, qmPutNodeMsgToQueryQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_FETCH, qmPutNodeMsgToFetchQueue, 1) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SCH_MERGE_FETCH, qmPutNodeMsgToFetchQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_FETCH_RSP, qmPutNodeMsgToFetchQueue, 1) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_QUERY_HEARTBEAT, qmPutNodeMsgToFetchQueue, 1) == NULL) goto _OVER;
 
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
index 1f7347203dcada7e1ca1f1632ffd46941c98c27b..a3df32a08c86c583deb4bd51ab31f52c588678aa 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmHandle.c
@@ -328,6 +328,7 @@ SArray *vmGetMsgHandles() {
   if (dmSetMgmtHandle(pArray, TDMT_SCH_MERGE_QUERY, vmPutMsgToQueryQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_QUERY_CONTINUE, vmPutMsgToQueryQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_SCH_FETCH, vmPutMsgToFetchQueue, 0) == NULL) goto _OVER;
+  if (dmSetMgmtHandle(pArray, TDMT_SCH_MERGE_FETCH, vmPutMsgToFetchQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_ALTER_TABLE, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_UPDATE_TAG_VAL, vmPutMsgToWriteQueue, 0) == NULL) goto _OVER;
   if (dmSetMgmtHandle(pArray, TDMT_VND_TABLE_META, vmPutMsgToFetchQueue, 0) == NULL) goto _OVER;
diff --git a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
index 3913e3fda8a2598ddc4546899f57c904c07f8c69..1d795c74f234f0b91978f4c2c738b64f3ffb0464 100644
--- a/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
+++ b/source/dnode/mgmt/mgmt_vnode/src/vmWorker.c
@@ -238,9 +238,9 @@ int32_t vmGetQueueSize(SVnodeMgmt *pMgmt, int32_t vgId, EQueueType qtype) {
 }
 
 int32_t vmAllocQueue(SVnodeMgmt *pMgmt, SVnodeObj *pVnode) {
-  pVnode->pWriteQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode->pImpl, (FItems)vnodeProposeMsg);
+  pVnode->pWriteQ = tWWorkerAllocQueue(&pMgmt->writePool, pVnode->pImpl, (FItems)vnodeProposeWriteMsg);
   pVnode->pSyncQ = tWWorkerAllocQueue(&pMgmt->syncPool, pVnode, (FItems)vmProcessSyncQueue);
-  pVnode->pApplyQ = tWWorkerAllocQueue(&pMgmt->applyPool, pVnode->pImpl, (FItems)vnodeApplyMsg);
+  pVnode->pApplyQ = tWWorkerAllocQueue(&pMgmt->applyPool, pVnode->pImpl, (FItems)vnodeApplyWriteMsg);
   pVnode->pQueryQ = tQWorkerAllocQueue(&pMgmt->queryPool, pVnode, (FItem)vmProcessQueryQueue);
   pVnode->pFetchQ = tQWorkerAllocQueue(&pMgmt->fetchPool, pVnode, (FItem)vmProcessFetchQueue);
 
diff --git a/source/dnode/mgmt/node_mgmt/src/dmTransport.c b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
index 70439915250b130539bb0e7e6f4ad5658c4f42c6..ad7fbf434405ec72e2e94f3728116f8ad3ccde63 100644
--- a/source/dnode/mgmt/node_mgmt/src/dmTransport.c
+++ b/source/dnode/mgmt/node_mgmt/src/dmTransport.c
@@ -42,7 +42,7 @@ static inline void dmBuildMnodeRedirectRsp(SDnode *pDnode, SRpcMsg *pMsg) {
 
 static inline void dmSendRedirectRsp(SRpcMsg *pMsg, const SEpSet *pNewEpSet) {
   pMsg->info.hasEpSet = 1;
-  SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info};
+  SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info, .msgType = pMsg->msgType};
   int32_t contLen = tSerializeSEpSet(NULL, 0, pNewEpSet);
 
   rsp.pCont = rpcMallocCont(contLen);
@@ -88,6 +88,7 @@ static void dmProcessRpcMsg(SDnode *pDnode, SRpcMsg *pRpc, SEpSet *pEpSet) {
     case TDMT_MND_SYSTABLE_RETRIEVE_RSP:
     case TDMT_DND_SYSTABLE_RETRIEVE_RSP:
     case TDMT_SCH_FETCH_RSP:
+    case TDMT_SCH_MERGE_FETCH_RSP:
       qWorkerProcessFetchRsp(NULL, NULL, pRpc, 0);
       return;
     case TDMT_MND_STATUS_RSP:
@@ -253,7 +254,7 @@ static inline void dmReleaseHandle(SRpcHandleInfo *pHandle, int8_t type) {
 static bool rpcRfp(int32_t code, tmsg_t msgType) {
   if (code == TSDB_CODE_RPC_REDIRECT || code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_NODE_NOT_DEPLOYED ||
       code == TSDB_CODE_SYN_NOT_LEADER || code == TSDB_CODE_APP_NOT_READY || code == TSDB_CODE_RPC_BROKEN_LINK) {
-    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH) {
+    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH || msgType == TDMT_SCH_MERGE_FETCH) {
       return false;
     }
     return true;
diff --git a/source/dnode/mnode/impl/src/mndMain.c b/source/dnode/mnode/impl/src/mndMain.c
index 5e708616fd834d5114e2a22362e5de7dd1b5d1f0..f18f3c983e306399deb0b2dcd65b839a2738940f 100644
--- a/source/dnode/mnode/impl/src/mndMain.c
+++ b/source/dnode/mnode/impl/src/mndMain.c
@@ -531,7 +531,8 @@ static int32_t mndCheckMnodeState(SRpcMsg *pMsg) {
   if (!IsReq(pMsg)) return 0;
   if (pMsg->msgType == TDMT_SCH_QUERY || pMsg->msgType == TDMT_SCH_MERGE_QUERY ||
       pMsg->msgType == TDMT_SCH_QUERY_CONTINUE || pMsg->msgType == TDMT_SCH_QUERY_HEARTBEAT ||
-      pMsg->msgType == TDMT_SCH_FETCH || pMsg->msgType == TDMT_SCH_DROP_TASK) {
+      pMsg->msgType == TDMT_SCH_FETCH || pMsg->msgType == TDMT_SCH_MERGE_FETCH ||
+      pMsg->msgType == TDMT_SCH_DROP_TASK) {
     return 0;
   }
   if (mndAcquireRpcRef(pMsg->info.node) == 0) return 0;
diff --git a/source/dnode/mnode/impl/src/mndQuery.c b/source/dnode/mnode/impl/src/mndQuery.c
index aec99fa3b75f65ebdb72d67ee6be4287be52cc89..5a527b994e2c8eb130fe5c16f294e7a9ef8342f2 100644
--- a/source/dnode/mnode/impl/src/mndQuery.c
+++ b/source/dnode/mnode/impl/src/mndQuery.c
@@ -45,6 +45,7 @@ int32_t mndProcessQueryMsg(SRpcMsg *pMsg) {
       code = qWorkerProcessCQueryMsg(&handle, pMnode->pQuery, pMsg, 0);
       break;
     case TDMT_SCH_FETCH:
+    case TDMT_SCH_MERGE_FETCH:
       code = qWorkerProcessFetchMsg(pMnode, pMnode->pQuery, pMsg, 0);
       break;
     case TDMT_SCH_DROP_TASK:
@@ -72,6 +73,7 @@ int32_t mndInitQuery(SMnode *pMnode) {
   mndSetMsgHandle(pMnode, TDMT_SCH_MERGE_QUERY, mndProcessQueryMsg);
   mndSetMsgHandle(pMnode, TDMT_SCH_QUERY_CONTINUE, mndProcessQueryMsg);
   mndSetMsgHandle(pMnode, TDMT_SCH_FETCH, mndProcessQueryMsg);
+  mndSetMsgHandle(pMnode, TDMT_SCH_MERGE_FETCH, mndProcessQueryMsg);
   mndSetMsgHandle(pMnode, TDMT_SCH_DROP_TASK, mndProcessQueryMsg);
   mndSetMsgHandle(pMnode, TDMT_SCH_QUERY_HEARTBEAT, mndProcessQueryMsg);
 
diff --git a/source/dnode/qnode/src/qnode.c b/source/dnode/qnode/src/qnode.c
index cfc63b083d3b2a8e3644a139cbf1dbd4a07cf935..723402e6397937b080858f86ae15c3b93ebd753c 100644
--- a/source/dnode/qnode/src/qnode.c
+++ b/source/dnode/qnode/src/qnode.c
@@ -86,6 +86,7 @@ int32_t qndProcessQueryMsg(SQnode *pQnode, int64_t ts, SRpcMsg *pMsg) {
       code = qWorkerProcessCQueryMsg(&handle, pQnode->pQuery, pMsg, ts);
       break;
     case TDMT_SCH_FETCH:
+    case TDMT_SCH_MERGE_FETCH:
       code = qWorkerProcessFetchMsg(pQnode, pQnode->pQuery, pMsg, ts);
       break;
     case TDMT_SCH_FETCH_RSP:
diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index 0498d889d68e0e111815e2bbd4af9545391a7907..6320f4719d77bc849bede984b607cddd4d57133e 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -51,15 +51,7 @@ int32_t vnodeCreate(const char *path, SVnodeCfg *pCfg, STfs *pTfs);
 void    vnodeDestroy(const char *path, STfs *pTfs);
 SVnode *vnodeOpen(const char *path, STfs *pTfs, SMsgCb msgCb);
 void    vnodeClose(SVnode *pVnode);
-int32_t vnodePreProcessReq(SVnode *pVnode, SRpcMsg *pMsg);
-int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRpcMsg *pRsp);
-int32_t vnodeProcessCMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp);
-int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp);
-int32_t vnodePreprocessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg);
-int32_t vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg);
-int32_t vnodeProcessFetchMsg(SVnode *pVnode, SRpcMsg *pMsg, SQueueInfo *pInfo);
-int32_t vnodeGetLoad(SVnode *pVnode, SVnodeLoad *pLoad);
-int32_t vnodeValidateTableHash(SVnode *pVnode, char *tableFName);
+
 int32_t vnodeStart(SVnode *pVnode);
 void    vnodeStop(SVnode *pVnode);
 int64_t vnodeGetSyncHandle(SVnode *pVnode);
@@ -68,14 +60,25 @@ void    vnodeGetInfo(SVnode *pVnode, const char **dbname, int32_t *vgId);
 int32_t vnodeSnapshotReaderOpen(SVnode *pVnode, SVSnapshotReader **ppReader, int64_t sver, int64_t ever);
 int32_t vnodeSnapshotReaderClose(SVSnapshotReader *pReader);
 int32_t vnodeSnapshotRead(SVSnapshotReader *pReader, const void **ppData, uint32_t *nData);
+
 int32_t vnodeProcessCreateTSma(SVnode *pVnode, void *pCont, uint32_t contLen);
 int32_t vnodeGetAllTableList(SVnode *pVnode, uint64_t uid, SArray *list);
 int32_t vnodeGetCtbIdList(SVnode *pVnode, int64_t suid, SArray *list);
 void   *vnodeGetIdx(SVnode *pVnode);
 void   *vnodeGetIvtIdx(SVnode *pVnode);
 
-void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
-void vnodeApplyMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
+int32_t vnodeGetLoad(SVnode *pVnode, SVnodeLoad *pLoad);
+int32_t vnodeValidateTableHash(SVnode *pVnode, char *tableFName);
+
+int32_t vnodePreProcessWriteMsg(SVnode *pVnode, SRpcMsg *pMsg);
+int32_t vnodePreprocessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg);
+
+int32_t vnodeProcessWriteMsg(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRpcMsg *pRsp);
+int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp);
+int32_t vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg);
+int32_t vnodeProcessFetchMsg(SVnode *pVnode, SRpcMsg *pMsg, SQueueInfo *pInfo);
+void    vnodeProposeWriteMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
+void    vnodeApplyWriteMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs);
 
 // meta
 typedef struct SMeta       SMeta;  // todo: remove
diff --git a/source/dnode/vnode/src/inc/vnd.h b/source/dnode/vnode/src/inc/vnd.h
index 32be479116c30e6e4023baa1bccaafdd1efdf22b..cb25e93cde52b3ef293ffec568ab3159ad0fd731 100644
--- a/source/dnode/vnode/src/inc/vnd.h
+++ b/source/dnode/vnode/src/inc/vnd.h
@@ -94,6 +94,8 @@ int32_t vnodeAsyncCommit(SVnode* pVnode);
 int32_t vnodeSyncOpen(SVnode* pVnode, char* path);
 void    vnodeSyncStart(SVnode* pVnode);
 void    vnodeSyncClose(SVnode* pVnode);
+void    vnodeRedirectRpcMsg(SVnode* pVnode, SRpcMsg* pMsg);
+bool    vnodeIsLeader(SVnode* pVnode);
 
 #ifdef __cplusplus
 }
diff --git a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
index ce42b0ab67bf725cd8636872363b5380176e4c6e..30bc603b309190cc11c7486e2faec998b5c5afab 100644
--- a/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbCacheRead.c
@@ -76,8 +76,8 @@ int32_t tsdbLastRowReaderOpen(void* pVnode, int32_t type, SArray* pTableIdList,
   p->pSchema = metaGetTbTSchema(p->pVnode->pMeta, pKeyInfo->uid, -1);
   p->pTableList = pTableIdList;
 
-  for(int32_t i = 0; i < p->numOfCols; ++i) {
-    if (IS_VAR_DATA_TYPE(colId[i])) {
+  for (int32_t i = 0; i < p->numOfCols; ++i) {
+    if (IS_VAR_DATA_TYPE(p->pSchema->columns[i].type)) {
       p->transferBuf[i] = taosMemoryMalloc(p->pSchema->columns[i].bytes);
     }
   }
diff --git a/source/dnode/vnode/src/vnd/vnodeSvr.c b/source/dnode/vnode/src/vnd/vnodeSvr.c
index 4530eee4a5b9f1272d49f5213612ce8f0539b5a1..b3e9f53a5a9c6459fbc6451ba84e32db20d9af51 100644
--- a/source/dnode/vnode/src/vnd/vnodeSvr.c
+++ b/source/dnode/vnode/src/vnd/vnodeSvr.c
@@ -28,7 +28,7 @@ static int32_t vnodeProcessAlterHasnRangeReq(SVnode *pVnode, int64_t version, vo
 static int32_t vnodeProcessDropTtlTbReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp);
 static int32_t vnodeProcessDeleteReq(SVnode *pVnode, int64_t version, void *pReq, int32_t len, SRpcMsg *pRsp);
 
-int32_t vnodePreProcessReq(SVnode *pVnode, SRpcMsg *pMsg) {
+int32_t vnodePreProcessWriteMsg(SVnode *pVnode, SRpcMsg *pMsg) {
   int32_t  code = 0;
   SDecoder dc = {0};
 
@@ -133,7 +133,7 @@ _err:
   return code;
 }
 
-int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRpcMsg *pRsp) {
+int32_t vnodeProcessWriteMsg(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRpcMsg *pRsp) {
   void   *ptr = NULL;
   void   *pReq;
   int32_t len;
@@ -169,7 +169,7 @@ int32_t vnodeProcessWriteReq(SVnode *pVnode, SRpcMsg *pMsg, int64_t version, SRp
       if (vnodeProcessDropTbReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
       break;
     case TDMT_VND_DROP_TTL_TABLE:
-      //if (vnodeProcessDropTtlTbReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
+      if (vnodeProcessDropTtlTbReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
       break;
     case TDMT_VND_CREATE_SMA: {
       if (vnodeProcessCreateTSmaReq(pVnode, version, pReq, len, pRsp) < 0) goto _err;
@@ -261,6 +261,11 @@ int32_t vnodePreprocessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg) {
 
 int32_t vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg) {
   vTrace("message in vnode query queue is processing");
+  if ((pMsg->msgType == TDMT_SCH_QUERY) && !vnodeIsLeader(pVnode)) {
+    vnodeRedirectRpcMsg(pVnode, pMsg);
+    return 0;
+  }
+
   SReadHandle handle = {.meta = pVnode->pMeta, .config = &pVnode->config, .vnode = pVnode, .pMsgCb = &pVnode->msgCb};
   switch (pMsg->msgType) {
     case TDMT_SCH_QUERY:
@@ -276,11 +281,18 @@ int32_t vnodeProcessQueryMsg(SVnode *pVnode, SRpcMsg *pMsg) {
 
 int32_t vnodeProcessFetchMsg(SVnode *pVnode, SRpcMsg *pMsg, SQueueInfo *pInfo) {
   vTrace("message in fetch queue is processing");
+  if ((pMsg->msgType == TDMT_SCH_FETCH || pMsg->msgType == TDMT_VND_TABLE_META || pMsg->msgType == TDMT_VND_TABLE_CFG) 
+     && !vnodeIsLeader(pVnode)) {
+    vnodeRedirectRpcMsg(pVnode, pMsg);
+    return 0;
+  }
+
   char   *msgstr = POINTER_SHIFT(pMsg->pCont, sizeof(SMsgHead));
   int32_t msgLen = pMsg->contLen - sizeof(SMsgHead);
 
   switch (pMsg->msgType) {
     case TDMT_SCH_FETCH:
+    case TDMT_SCH_MERGE_FETCH:
       return qWorkerProcessFetchMsg(pVnode, pVnode->pQuery, pMsg, 0);
     case TDMT_SCH_FETCH_RSP:
       return qWorkerProcessFetchRsp(pVnode, pVnode->pQuery, pMsg, 0);
diff --git a/source/dnode/vnode/src/vnd/vnodeSync.c b/source/dnode/vnode/src/vnd/vnodeSync.c
index 399a5b62992186cab23db9640f519f43ac99e0fc..f75ccba4bba7faf54d2aa0abdacdd0b8cca09a24 100644
--- a/source/dnode/vnode/src/vnd/vnodeSync.c
+++ b/source/dnode/vnode/src/vnd/vnodeSync.c
@@ -120,7 +120,24 @@ static int32_t vnodeProcessAlterReplicaReq(SVnode *pVnode, SRpcMsg *pMsg) {
   return code;
 }
 
-void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
+void vnodeRedirectRpcMsg(SVnode *pVnode, SRpcMsg *pMsg) {
+  SEpSet newEpSet = {0};
+  syncGetRetryEpSet(pVnode->sync, &newEpSet);
+
+  const STraceId *trace = &pMsg->info.traceId;
+  vGTrace("vgId:%d, msg:%p is redirect since not leader, numOfEps:%d inUse:%d", pVnode->config.vgId, pMsg,
+          newEpSet.numOfEps, newEpSet.inUse);
+  for (int32_t i = 0; i < newEpSet.numOfEps; ++i) {
+    vGTrace("vgId:%d, msg:%p redirect:%d ep:%s:%u", pVnode->config.vgId, pMsg, i, newEpSet.eps[i].fqdn,
+            newEpSet.eps[i].port);
+  }
+  pMsg->info.hasEpSet = 1;
+
+  SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info, .msgType = pMsg->msgType + 1};
+  tmsgSendRedirectRsp(&rsp, &newEpSet);
+}
+
+void vnodeProposeWriteMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   SVnode  *pVnode = pInfo->ahandle;
   int32_t  vgId = pVnode->config.vgId;
   int32_t  code = 0;
@@ -131,7 +148,7 @@ void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
     const STraceId *trace = &pMsg->info.traceId;
     vGTrace("vgId:%d, msg:%p get from vnode-write queue handle:%p", vgId, pMsg, pMsg->info.handle);
 
-    code = vnodePreProcessReq(pVnode, pMsg);
+    code = vnodePreProcessWriteMsg(pVnode, pMsg);
     if (code != 0) {
       vError("vgId:%d, msg:%p failed to pre-process since %s", vgId, pMsg, terrstr());
     } else {
@@ -141,7 +158,7 @@ void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
         code = syncPropose(pVnode->sync, pMsg, vnodeIsMsgWeak(pMsg->msgType));
         if (code > 0) {
           SRpcMsg rsp = {.code = pMsg->code, .info = pMsg->info};
-          if (vnodeProcessWriteReq(pVnode, pMsg, pMsg->info.conn.applyIndex, &rsp) < 0) {
+          if (vnodeProcessWriteMsg(pVnode, pMsg, pMsg->info.conn.applyIndex, &rsp) < 0) {
             rsp.code = terrno;
             vError("vgId:%d, msg:%p failed to apply right now since %s", vgId, pMsg, terrstr());
           }
@@ -156,16 +173,7 @@ void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
       vnodeAccumBlockMsg(pVnode, pMsg->msgType);
     } else if (code < 0) {
       if (terrno == TSDB_CODE_SYN_NOT_LEADER) {
-        SEpSet newEpSet = {0};
-        syncGetRetryEpSet(pVnode->sync, &newEpSet);
-        vGTrace("vgId:%d, msg:%p is redirect since not leader, numOfEps:%d inUse:%d", vgId, pMsg, newEpSet.numOfEps,
-                newEpSet.inUse);
-        for (int32_t i = 0; i < newEpSet.numOfEps; ++i) {
-          vGTrace("vgId:%d, msg:%p redirect:%d ep:%s:%u", vgId, pMsg, i, newEpSet.eps[i].fqdn, newEpSet.eps[i].port);
-        }
-        pMsg->info.hasEpSet = 1;
-        SRpcMsg rsp = {.code = TSDB_CODE_RPC_REDIRECT, .info = pMsg->info};
-        tmsgSendRedirectRsp(&rsp, &newEpSet);
+        vnodeRedirectRpcMsg(pVnode, pMsg);
       } else {
         if (terrno != 0) code = terrno;
         vError("vgId:%d, msg:%p failed to propose since %s, code:0x%x", vgId, pMsg, tstrerror(code), code);
@@ -185,7 +193,7 @@ void vnodeProposeMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   vnodeWaitBlockMsg(pVnode);
 }
 
-void vnodeApplyMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
+void vnodeApplyWriteMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
   SVnode  *pVnode = pInfo->ahandle;
   int32_t  vgId = pVnode->config.vgId;
   int32_t  code = 0;
@@ -199,7 +207,7 @@ void vnodeApplyMsg(SQueueInfo *pInfo, STaosQall *qall, int32_t numOfMsgs) {
 
     SRpcMsg rsp = {.code = pMsg->code, .info = pMsg->info};
     if (rsp.code == 0) {
-      if (vnodeProcessWriteReq(pVnode, pMsg, pMsg->info.conn.applyIndex, &rsp) < 0) {
+      if (vnodeProcessWriteMsg(pVnode, pMsg, pMsg->info.conn.applyIndex, &rsp) < 0) {
         rsp.code = terrno;
         vError("vgId:%d, msg:%p failed to apply since %s", vgId, pMsg, terrstr());
       }
@@ -265,6 +273,11 @@ int32_t vnodeProcessSyncMsg(SVnode *pVnode, SRpcMsg *pMsg, SRpcMsg **pRsp) {
       ASSERT(pSyncMsg != NULL);
       code = syncNodeOnClientRequestCb(pSyncNode, pSyncMsg, NULL);
       syncClientRequestDestroy(pSyncMsg);
+    } else if (pMsg->msgType == TDMT_SYNC_CLIENT_REQUEST_BATCH) {
+      SyncClientRequestBatch *pSyncMsg = syncClientRequestBatchFromRpcMsg(pMsg);
+      ASSERT(pSyncMsg != NULL);
+      code = syncNodeOnClientRequestBatchCb(pSyncNode, pSyncMsg);
+      syncClientRequestBatchDestroyDeep(pSyncMsg);
     } else if (pMsg->msgType == TDMT_SYNC_REQUEST_VOTE) {
       SyncRequestVote *pSyncMsg = syncRequestVoteFromRpcMsg2(pMsg);
       ASSERT(pSyncMsg != NULL);
@@ -508,3 +521,17 @@ void vnodeSyncStart(SVnode *pVnode) {
 }
 
 void vnodeSyncClose(SVnode *pVnode) { syncStop(pVnode->sync); }
+
+bool vnodeIsLeader(SVnode *pVnode) {
+  if (!syncIsReady(pVnode->sync)) {
+    return false;
+  }
+
+  // todo
+  // if (!pVnode->restored) {
+  //   terrno = TSDB_CODE_APP_NOT_READY;
+  //   return false;
+  // }
+
+  return true;
+}
\ No newline at end of file
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 6024b753936b0c42da83ad6f7bf5a045e31447d7..2b10936bb15d25a77aa28a8e1e36a1b989b86c1a 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -2053,7 +2053,7 @@ static int32_t doSendFetchDataRequest(SExchangeInfo* pExchangeInfo, SExecTaskInf
   pMsgSendInfo->param = pWrapper;
   pMsgSendInfo->msgInfo.pData = pMsg;
   pMsgSendInfo->msgInfo.len = sizeof(SResFetchReq);
-  pMsgSendInfo->msgType = TDMT_SCH_FETCH;
+  pMsgSendInfo->msgType = pSource->fetchMsgType;
   pMsgSendInfo->fp = loadRemoteDataCallback;
 
   int64_t transporterId = 0;
diff --git a/source/libs/function/src/udfd.c b/source/libs/function/src/udfd.c
index 708ea4bd3815cce731e909739085977f5975fcab..a412b589a9eb1163c80bb0677838b4d39070e25f 100644
--- a/source/libs/function/src/udfd.c
+++ b/source/libs/function/src/udfd.c
@@ -549,7 +549,7 @@ int32_t udfdLoadUdf(char *udfName, SUdf *udf) {
 static bool udfdRpcRfp(int32_t code, tmsg_t msgType) {
   if (code == TSDB_CODE_RPC_REDIRECT || code == TSDB_CODE_RPC_NETWORK_UNAVAIL || code == TSDB_CODE_NODE_NOT_DEPLOYED ||
       code == TSDB_CODE_SYN_NOT_LEADER || code == TSDB_CODE_APP_NOT_READY || code == TSDB_CODE_RPC_BROKEN_LINK) {
-    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH) {
+    if (msgType == TDMT_SCH_QUERY || msgType == TDMT_SCH_MERGE_QUERY || msgType == TDMT_SCH_FETCH || msgType == TDMT_SCH_MERGE_FETCH) {
       return false;
     } 
     return true;
diff --git a/source/libs/nodes/src/nodesCloneFuncs.c b/source/libs/nodes/src/nodesCloneFuncs.c
index a1b0cc59470d387d4bb865ca622e473b2d066376..6c0717e8450e5b5e3a5f5f07bcc29545035d7eb0 100644
--- a/source/libs/nodes/src/nodesCloneFuncs.c
+++ b/source/libs/nodes/src/nodesCloneFuncs.c
@@ -595,6 +595,7 @@ static int32_t downstreamSourceCopy(const SDownstreamSourceNode* pSrc, SDownstre
   COPY_SCALAR_FIELD(taskId);
   COPY_SCALAR_FIELD(schedId);
   COPY_SCALAR_FIELD(execId);
+  COPY_SCALAR_FIELD(fetchMsgType);
   return TSDB_CODE_SUCCESS;
 }
 
diff --git a/source/libs/nodes/src/nodesCodeFuncs.c b/source/libs/nodes/src/nodesCodeFuncs.c
index 0bff063ea1a5fbb168472c978580f5b15cc348d3..2a94ee43e3f13340cf06919fd111ce44274fdad5 100644
--- a/source/libs/nodes/src/nodesCodeFuncs.c
+++ b/source/libs/nodes/src/nodesCodeFuncs.c
@@ -3538,6 +3538,7 @@ static const char* jkDownstreamSourceAddr = "Addr";
 static const char* jkDownstreamSourceTaskId = "TaskId";
 static const char* jkDownstreamSourceSchedId = "SchedId";
 static const char* jkDownstreamSourceExecId = "ExecId";
+static const char* jkDownstreamSourceFetchMsgType = "FetchMsgType";
 
 static int32_t downstreamSourceNodeToJson(const void* pObj, SJson* pJson) {
   const SDownstreamSourceNode* pNode = (const SDownstreamSourceNode*)pObj;
@@ -3552,6 +3553,9 @@ static int32_t downstreamSourceNodeToJson(const void* pObj, SJson* pJson) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonAddIntegerToObject(pJson, jkDownstreamSourceExecId, pNode->execId);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonAddIntegerToObject(pJson, jkDownstreamSourceFetchMsgType, pNode->fetchMsgType);
+  }
 
   return code;
 }
@@ -3569,6 +3573,9 @@ static int32_t jsonToDownstreamSourceNode(const SJson* pJson, void* pObj) {
   if (TSDB_CODE_SUCCESS == code) {
     code = tjsonGetIntValue(pJson, jkDownstreamSourceExecId, &pNode->execId);
   }
+  if (TSDB_CODE_SUCCESS == code) {
+    code = tjsonGetIntValue(pJson, jkDownstreamSourceFetchMsgType, &pNode->fetchMsgType);
+  }
 
   return code;
 }
diff --git a/source/libs/planner/src/planPhysiCreater.c b/source/libs/planner/src/planPhysiCreater.c
index 2356eb368e61035307f97665c2f2ce183ab99a9f..0ec7334c39c335f6285e5bace7fa682ec7ec05e3 100644
--- a/source/libs/planner/src/planPhysiCreater.c
+++ b/source/libs/planner/src/planPhysiCreater.c
@@ -1067,6 +1067,10 @@ static int32_t createWindowPhysiNodeFinalize(SPhysiPlanContext* pCxt, SNodeList*
     }
   }
 
+  if (TSDB_CODE_SUCCESS == code) {
+    code = setConditionsSlotId(pCxt, (const SLogicNode*)pWindowLogicNode, (SPhysiNode*)pWindow);
+  }
+
   pWindow->triggerType = pWindowLogicNode->triggerType;
   pWindow->watermark = pWindowLogicNode->watermark;
   pWindow->igExpired = pWindowLogicNode->igExpired;
diff --git a/source/libs/qcom/src/queryUtil.c b/source/libs/qcom/src/queryUtil.c
index 923224688cf509e7cc1a8c6e94a4ff2b77a81211..b4e217ef7482d44d6ebca0509c3043fec175e72b 100644
--- a/source/libs/qcom/src/queryUtil.c
+++ b/source/libs/qcom/src/queryUtil.c
@@ -265,7 +265,6 @@ int32_t dataConverToStr(char* str, int type, void* buf, int32_t bufSize, int32_t
       break;
 
     case TSDB_DATA_TYPE_BINARY:
-    case TSDB_DATA_TYPE_NCHAR:
       if (bufSize < 0) {
         //        tscError("invalid buf size");
         return TSDB_CODE_TSC_INVALID_VALUE;
@@ -276,7 +275,20 @@ int32_t dataConverToStr(char* str, int type, void* buf, int32_t bufSize, int32_t
       *(str + bufSize + 1) = '"';
       n = bufSize + 2;
       break;
+    case TSDB_DATA_TYPE_NCHAR:
+      if (bufSize < 0) {
+        //        tscError("invalid buf size");
+        return TSDB_CODE_TSC_INVALID_VALUE;
+      }
 
+      *str = '"';
+      int32_t length = taosUcs4ToMbs((TdUcs4 *)buf, bufSize, str + 1);
+      if (length <= 0) {
+        return TSDB_CODE_TSC_INVALID_VALUE;
+      }
+      *(str + length + 1) = '"';
+      n = length + 2;
+      break;
     case TSDB_DATA_TYPE_UTINYINT:
       n = sprintf(str, "%d", *(uint8_t*)buf);
       break;
@@ -298,7 +310,7 @@ int32_t dataConverToStr(char* str, int type, void* buf, int32_t bufSize, int32_t
       return TSDB_CODE_TSC_INVALID_VALUE;
   }
 
-  *len = n;
+  if(len) *len = n;
 
   return TSDB_CODE_SUCCESS;
 }
diff --git a/source/libs/qworker/inc/qwInt.h b/source/libs/qworker/inc/qwInt.h
index eb10a2fdd6e05a81f0c9f291f79b414c6112015f..2b1e535e8c261ab6c96648d77af7aa6d4224fdf6 100644
--- a/source/libs/qworker/inc/qwInt.h
+++ b/source/libs/qworker/inc/qwInt.h
@@ -123,6 +123,7 @@ typedef struct SQWTaskCtx {
   int8_t   taskType;
   int8_t   explain;
   int32_t  queryType;
+  int32_t  fetchType;
   int32_t  execId;
 
   bool    queryFetched;
diff --git a/source/libs/qworker/inc/qwMsg.h b/source/libs/qworker/inc/qwMsg.h
index 75b11c1b0b659e508ce412a113173b143d31724c..7becaf06eb414da2636e43889fd05a84deb7dd14 100644
--- a/source/libs/qworker/inc/qwMsg.h
+++ b/source/libs/qworker/inc/qwMsg.h
@@ -35,8 +35,7 @@ int32_t qwProcessDelete(QW_FPARAMS_DEF, SQWMsg *qwMsg, SDeleteRes *pRes);
 
 int32_t qwBuildAndSendDropRsp(SRpcHandleInfo *pConn, int32_t code);
 int32_t qwBuildAndSendCancelRsp(SRpcHandleInfo *pConn, int32_t code);
-int32_t qwBuildAndSendFetchRsp(SRpcHandleInfo *pConn, SRetrieveTableRsp *pRsp, int32_t dataLength,
-                               int32_t code);
+int32_t qwBuildAndSendFetchRsp(int32_t rspType, SRpcHandleInfo *pConn, SRetrieveTableRsp *pRsp, int32_t dataLength, int32_t code);
 void    qwBuildFetchRsp(void *msg, SOutputData *input, int32_t len, bool qComplete);
 int32_t qwBuildAndSendCQueryMsg(QW_FPARAMS_DEF, SRpcHandleInfo *pConn);
 int32_t qwBuildAndSendQueryRsp(int32_t rspType, SRpcHandleInfo *pConn, int32_t code, STbVerInfo* tbInfo);
diff --git a/source/libs/qworker/src/qwMsg.c b/source/libs/qworker/src/qwMsg.c
index 8df3ac90facb187ce14b69730c7ad6fbe94c4273..ea5aa3c563bf8f7527395bd0bcd4f72b1149019d 100644
--- a/source/libs/qworker/src/qwMsg.c
+++ b/source/libs/qworker/src/qwMsg.c
@@ -104,7 +104,7 @@ int32_t qwBuildAndSendHbRsp(SRpcHandleInfo *pConn, SSchedulerHbRsp *pStatus, int
   return TSDB_CODE_SUCCESS;
 }
 
-int32_t qwBuildAndSendFetchRsp(SRpcHandleInfo *pConn, SRetrieveTableRsp *pRsp, int32_t dataLength, int32_t code) {
+int32_t qwBuildAndSendFetchRsp(int32_t rspType, SRpcHandleInfo *pConn, SRetrieveTableRsp *pRsp, int32_t dataLength, int32_t code) {
   if (NULL == pRsp) {
     pRsp = (SRetrieveTableRsp *)rpcMallocCont(sizeof(SRetrieveTableRsp));
     memset(pRsp, 0, sizeof(SRetrieveTableRsp));
@@ -112,7 +112,7 @@ int32_t qwBuildAndSendFetchRsp(SRpcHandleInfo *pConn, SRetrieveTableRsp *pRsp, i
   }
 
   SRpcMsg rpcRsp = {
-      .msgType = TDMT_SCH_FETCH_RSP,
+      .msgType = rspType,
       .pCont = pRsp,
       .contLen = sizeof(*pRsp) + dataLength,
       .code = code,
@@ -436,7 +436,7 @@ int32_t qWorkerProcessFetchMsg(void *node, void *qWorkerMgmt, SRpcMsg *pMsg, int
   int64_t  rId = 0;
   int32_t  eId = msg->execId;
 
-  SQWMsg qwMsg = {.node = node, .msg = NULL, .msgLen = 0, .connInfo = pMsg->info};
+  SQWMsg qwMsg = {.node = node, .msg = NULL, .msgLen = 0, .connInfo = pMsg->info, .msgType = pMsg->msgType};
 
   QW_SCH_TASK_DLOG("processFetch start, node:%p, handle:%p", node, pMsg->info.handle);
 
diff --git a/source/libs/qworker/src/qworker.c b/source/libs/qworker/src/qworker.c
index 5ba525329f5912019b2145d6f6170fec0a445551..3f8d62b1aad38f2ed159c2eb9139ee0a85bb65e9 100644
--- a/source/libs/qworker/src/qworker.c
+++ b/source/libs/qworker/src/qworker.c
@@ -606,7 +606,7 @@ int32_t qwProcessCQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
         qwMsg->connInfo = ctx->dataConnInfo;
         QW_SET_EVENT_PROCESSED(ctx, QW_EVENT_FETCH);
 
-        qwBuildAndSendFetchRsp(&qwMsg->connInfo, rsp, dataLen, code);
+        qwBuildAndSendFetchRsp(ctx->fetchType, &qwMsg->connInfo, rsp, dataLen, code);
         rsp = NULL;
         
         QW_TASK_DLOG("fetch rsp send, handle:%p, code:%x - %s, dataLen:%d", qwMsg->connInfo.handle, code,
@@ -628,7 +628,7 @@ int32_t qwProcessCQuery(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
       rsp = NULL;
 
       qwMsg->connInfo = ctx->dataConnInfo;
-      qwBuildAndSendFetchRsp(&qwMsg->connInfo, NULL, 0, code);
+      qwBuildAndSendFetchRsp(ctx->fetchType, &qwMsg->connInfo, NULL, 0, code);
       QW_TASK_DLOG("fetch rsp send, handle:%p, code:%x - %s, dataLen:%d", qwMsg->connInfo.handle, code, tstrerror(code),
                    0);
     }
@@ -661,6 +661,8 @@ int32_t qwProcessFetch(QW_FPARAMS_DEF, SQWMsg *qwMsg) {
 
   QW_ERR_JRET(qwGetTaskCtx(QW_FPARAMS(), &ctx));
 
+  ctx->queryType = qwMsg->msgType;
+
   SOutputData sOutput = {0};
   QW_ERR_JRET(qwGetQueryResFromSink(QW_FPARAMS(), ctx, &dataLen, &rsp, &sOutput));
 
@@ -711,7 +713,7 @@ _return:
   }
 
   if (code || rsp) {
-    qwBuildAndSendFetchRsp(&qwMsg->connInfo, rsp, dataLen, code);
+    qwBuildAndSendFetchRsp(qwMsg->msgType + 1, &qwMsg->connInfo, rsp, dataLen, code);
     QW_TASK_DLOG("fetch rsp send, handle:%p, code:%x - %s, dataLen:%d", qwMsg->connInfo.handle, code, tstrerror(code),
                  dataLen);
   }
diff --git a/source/libs/qworker/test/qworkerTests.cpp b/source/libs/qworker/test/qworkerTests.cpp
index bc37400249d43e27c82fd22d94680c69823de61d..be54db51de1c077092d1bdaa05959c58169c9f98 100644
--- a/source/libs/qworker/test/qworkerTests.cpp
+++ b/source/libs/qworker/test/qworkerTests.cpp
@@ -214,7 +214,8 @@ void qwtRpcSendResponse(const SRpcMsg *pRsp) {
       rpcFreeCont(rsp);
       break;
     }
-    case TDMT_SCH_FETCH_RSP: {
+    case TDMT_SCH_FETCH_RSP:
+    case TDMT_SCH_MERGE_FETCH_RSP: {
       SRetrieveTableRsp *rsp = (SRetrieveTableRsp *)pRsp->pCont;
   
       if (0 == pRsp->code && 0 == rsp->completed) {
@@ -815,6 +816,7 @@ void *fetchQueueThread(void *param) {
 
     switch (fetchRpc->msgType) {
       case TDMT_SCH_FETCH:
+      case TDMT_SCH_MERGE_FETCH:
         qWorkerProcessFetchMsg(mockPointer, mgmt, fetchRpc, 0);
         break;
       case TDMT_SCH_CANCEL_TASK:
diff --git a/source/libs/scheduler/inc/schInt.h b/source/libs/scheduler/inc/schInt.h
index 8e8652aab56b6159fe4c2a603cde29e40ef9d85c..7289e4b6bec7572c76a8c99b1d6ba8ebd394c552 100644
--- a/source/libs/scheduler/inc/schInt.h
+++ b/source/libs/scheduler/inc/schInt.h
@@ -35,7 +35,7 @@ extern "C" {
 #define SCH_DEFAULT_TASK_TIMEOUT_USEC 10000000
 #define SCH_MAX_TASK_TIMEOUT_USEC 60000000
 
-#define SCH_TASK_MAX_EXEC_TIMES 5
+#define SCH_TASK_MAX_EXEC_TIMES 8
 #define SCH_MAX_CANDIDATE_EP_NUM TSDB_MAX_REPLICA
 
 enum {
@@ -318,6 +318,7 @@ extern SSchedulerMgmt schMgmt;
 #define SCH_SET_JOB_NEED_FLOW_CTRL(_job) (_job)->attr.needFlowCtrl = true
 #define SCH_JOB_NEED_FLOW_CTRL(_job) ((_job)->attr.needFlowCtrl)
 #define SCH_TASK_NEED_FLOW_CTRL(_job, _task) (SCH_IS_DATA_SRC_QRY_TASK(_task) && SCH_JOB_NEED_FLOW_CTRL(_job) && SCH_IS_LEVEL_UNFINISHED((_task)->level))
+#define SCH_FETCH_TYPE(_pSrcTask) (SCH_IS_DATA_SRC_QRY_TASK(_pSrcTask) ? TDMT_SCH_FETCH : TDMT_SCH_MERGE_FETCH)
 
 #define SCH_SET_JOB_TYPE(_job, type) do { if ((type) != SUBPLAN_TYPE_MODIFY) { (_job)->attr.queryJob = true; } } while (0)
 #define SCH_IS_QUERY_JOB(_job) ((_job)->attr.queryJob) 
@@ -327,7 +328,7 @@ extern SSchedulerMgmt schMgmt;
 #define SCH_IS_EXPLAIN_JOB(_job) (EXPLAIN_MODE_ANALYZE == (_job)->attr.explainMode)
 #define SCH_NETWORK_ERR(_code) ((_code) == TSDB_CODE_RPC_BROKEN_LINK || (_code) == TSDB_CODE_RPC_NETWORK_UNAVAIL)
 #define SCH_SUB_TASK_NETWORK_ERR(_code, _len) (SCH_NETWORK_ERR(_code) && ((_len) > 0))
-#define SCH_NEED_REDIRECT_MSGTYPE(_msgType) ((_msgType) == TDMT_SCH_QUERY || (_msgType) == TDMT_SCH_MERGE_QUERY || (_msgType) == TDMT_SCH_FETCH)
+#define SCH_NEED_REDIRECT_MSGTYPE(_msgType) ((_msgType) == TDMT_SCH_QUERY || (_msgType) == TDMT_SCH_MERGE_QUERY || (_msgType) == TDMT_SCH_FETCH || (_msgType) == TDMT_SCH_MERGE_FETCH)
 #define SCH_NEED_REDIRECT(_msgType, _code, _rspLen) (SCH_NEED_REDIRECT_MSGTYPE(_msgType) && (NEED_SCHEDULER_REDIRECT_ERROR(_code) || SCH_SUB_TASK_NETWORK_ERR(_code, _rspLen)))
 #define SCH_NEED_RETRY(_msgType, _code) ((SCH_NETWORK_ERR(_code) && SCH_NEED_REDIRECT_MSGTYPE(_msgType)) || (_code) == TSDB_CODE_SCH_TIMEOUT_ERROR)
 
diff --git a/source/libs/scheduler/src/schRemote.c b/source/libs/scheduler/src/schRemote.c
index bf85d09e004c2bf882512ae61f365f1c7f82699d..e1035c4fca59c15bdedc1c0ae1011a994bfb9398 100644
--- a/source/libs/scheduler/src/schRemote.c
+++ b/source/libs/scheduler/src/schRemote.c
@@ -44,6 +44,7 @@ int32_t schValidateReceivedMsgType(SSchJob *pJob, SSchTask *pTask, int32_t msgTy
       // SCH_SET_TASK_LASTMSG_TYPE(pTask, -1);
       return TSDB_CODE_SUCCESS;
     case TDMT_SCH_FETCH_RSP:
+    case TDMT_SCH_MERGE_FETCH_RSP:
       if (lastMsgType != reqMsgType && -1 != lastMsgType) {
         SCH_TASK_ELOG("rsp msg type mis-match, last sent msgType:%s, rspType:%s", TMSG_INFO(lastMsgType),
                       TMSG_INFO(msgType));
@@ -304,7 +305,8 @@ int32_t schHandleResponseMsg(SSchJob *pJob, SSchTask *pTask, int32_t execId, SDa
       }
       break;
     }
-    case TDMT_SCH_FETCH_RSP: {
+    case TDMT_SCH_FETCH_RSP:
+    case TDMT_SCH_MERGE_FETCH_RSP: {
       SRetrieveTableRsp *rsp = (SRetrieveTableRsp *)msg;
 
       SCH_ERR_JRET(rspCode);
@@ -558,6 +560,7 @@ int32_t schGetCallbackFp(int32_t msgType, __async_send_cb_fn_t *fp) {
     case TDMT_VND_DELETE:
     case TDMT_SCH_EXPLAIN:
     case TDMT_SCH_FETCH:
+    case TDMT_SCH_MERGE_FETCH:
       *fp = schHandleCallback;
       break;
     case TDMT_SCH_DROP_TASK:
@@ -1016,7 +1019,8 @@ int32_t schBuildAndSendMsg(SSchJob *pJob, SSchTask *pTask, SQueryNodeAddr *addr,
       persistHandle = true;
       break;
     }
-    case TDMT_SCH_FETCH: {
+    case TDMT_SCH_FETCH:
+    case TDMT_SCH_MERGE_FETCH: {
       msgSize = sizeof(SResFetchReq);
       msg = taosMemoryCalloc(1, msgSize);
       if (NULL == msg) {
diff --git a/source/libs/scheduler/src/schTask.c b/source/libs/scheduler/src/schTask.c
index e60006d75c4eb5a8d8b3b2f63182f74485c07e6a..45cb0ab93504a839b368f0d12fa038053d93e7b6 100644
--- a/source/libs/scheduler/src/schTask.c
+++ b/source/libs/scheduler/src/schTask.c
@@ -258,7 +258,9 @@ int32_t schProcessOnTaskSuccess(SSchJob *pJob, SSchTask *pTask) {
                                     .taskId = pTask->taskId,
                                     .schedId = schMgmt.sId,
                                     .execId = pTask->execId,
-                                    .addr = pTask->succeedAddr};
+                                    .addr = pTask->succeedAddr,
+                                    .fetchMsgType = SCH_FETCH_TYPE(pTask),
+                                    };
     qSetSubplanExecutionNode(parent->plan, pTask->plan->id.groupId, &source);
     SCH_UNLOCK(SCH_WRITE, &parent->lock);
 
@@ -818,7 +820,7 @@ int32_t schLaunchFetchTask(SSchJob *pJob) {
     return TSDB_CODE_SUCCESS;
   }
 
-  SCH_ERR_JRET(schBuildAndSendMsg(pJob, pJob->fetchTask, &pJob->resNode, TDMT_SCH_FETCH));
+  SCH_ERR_JRET(schBuildAndSendMsg(pJob, pJob->fetchTask, &pJob->resNode, SCH_FETCH_TYPE(pJob->fetchTask)));
 
   return TSDB_CODE_SUCCESS;
 
diff --git a/source/libs/sync/src/syncMain.c b/source/libs/sync/src/syncMain.c
index e207d89212186ff806dabef9c490e98efc826699..cc6057b031db0e92ed062e26b64973c63e6d5d58 100644
--- a/source/libs/sync/src/syncMain.c
+++ b/source/libs/sync/src/syncMain.c
@@ -648,8 +648,6 @@ void setHeartbeatTimerMS(int64_t rid, int32_t hbTimerMS) {
 }
 
 int32_t syncPropose(int64_t rid, SRpcMsg* pMsg, bool isWeak) {
-  int32_t ret = 0;
-
   SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
   if (pSyncNode == NULL) {
     taosReleaseRef(tsNodeRefId, rid);
@@ -657,8 +655,8 @@ int32_t syncPropose(int64_t rid, SRpcMsg* pMsg, bool isWeak) {
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
-  ret = syncNodePropose(pSyncNode, pMsg, isWeak);
 
+  int32_t ret = syncNodePropose(pSyncNode, pMsg, isWeak);
   taosReleaseRef(tsNodeRefId, pSyncNode->rid);
   return ret;
 }
@@ -669,15 +667,14 @@ int32_t syncProposeBatch(int64_t rid, SRpcMsg* pMsgArr, bool* pIsWeakArr, int32_
     return -1;
   }
 
-  int32_t    ret = 0;
   SSyncNode* pSyncNode = taosAcquireRef(tsNodeRefId, rid);
   if (pSyncNode == NULL) {
     terrno = TSDB_CODE_SYN_INTERNAL_ERROR;
     return -1;
   }
   ASSERT(rid == pSyncNode->rid);
-  ret = syncNodeProposeBatch(pSyncNode, pMsgArr, pIsWeakArr, arrSize);
 
+  int32_t ret = syncNodeProposeBatch(pSyncNode, pMsgArr, pIsWeakArr, arrSize);
   taosReleaseRef(tsNodeRefId, pSyncNode->rid);
   return ret;
 }
diff --git a/source/libs/tdb/src/db/tdbBtree.c b/source/libs/tdb/src/db/tdbBtree.c
index 5d51a031bf8054b8f60a08759b74d2d9454d9398..3768eef7c98ca05338d8a73cc425d8160edfd277 100644
--- a/source/libs/tdb/src/db/tdbBtree.c
+++ b/source/libs/tdb/src/db/tdbBtree.c
@@ -314,7 +314,6 @@ static int tdbDefaultKeyCmprFn(const void *pKey1, int keyLen1, const void *pKey2
 
 static int tdbBtreeOpenImpl(SBTree *pBt) {
   // Try to get the root page of the an existing btree
-
   SPgno  pgno;
   SPage *pPage;
   int    ret;
@@ -1993,6 +1992,7 @@ int tdbBtcMoveTo(SBTC *pBtc, const void *pKey, int kLen, int *pCRst) {
   const void *pTKey;
   int         tkLen;
 
+  tdbTrace("ttl moveto, pager:%p, ipage:%d", pPager, pBtc->iPage);
   if (pBtc->iPage < 0) {
     // move from a clear cursor
     ret = tdbPagerFetchPage(pPager, &pBt->root, &(pBtc->pPage), tdbBtreeInitPage,
diff --git a/source/libs/tdb/src/db/tdbDb.c b/source/libs/tdb/src/db/tdbDb.c
index c06f7305ab71a7cb2f8bc6facad41369cf423927..186217878b2d041acce591d8ec00350c955e2298 100644
--- a/source/libs/tdb/src/db/tdbDb.c
+++ b/source/libs/tdb/src/db/tdbDb.c
@@ -121,9 +121,10 @@ SPager *tdbEnvGetPager(TDB *pDb, const char *fname) {
 
   hash = tdbCstringHash(fname);
   ppPager = &pDb->pgrHash[hash % pDb->nPgrHash];
+  tdbTrace("tdbttl getPager1: pager:%p, index:%d, name:%s", *ppPager, hash % pDb->nPgrHash, fname);
   for (; *ppPager && (strcmp(fname, (*ppPager)->dbFileName) != 0); ppPager = &((*ppPager)->pHashNext)) {
   }
-
+  tdbTrace("tdbttl getPager2: pager:%p, index:%d, name:%s", *ppPager, hash % pDb->nPgrHash, fname);
   return *ppPager;
 }
 
@@ -143,9 +144,12 @@ void tdbEnvAddPager(TDB *pDb, SPager *pPager) {
   // add to hash
   hash = tdbCstringHash(pPager->dbFileName);
   ppPager = &pDb->pgrHash[hash % pDb->nPgrHash];
+  tdbTrace("tdbttl addPager1: pager:%p, index:%d, name:%s", *ppPager, hash % pDb->nPgrHash, pPager->dbFileName);
   pPager->pHashNext = *ppPager;
   *ppPager = pPager;
 
+  tdbTrace("tdbttl addPager2: pager:%p, index:%d, name:%s", *ppPager, hash % pDb->nPgrHash, pPager->dbFileName);
+
   // increase the counter
   pDb->nPager++;
 }
diff --git a/source/libs/tdb/src/db/tdbPager.c b/source/libs/tdb/src/db/tdbPager.c
index 892a9137738f2cc2494d7903366ce27c911a64ae..dad4511491babcc5aae5cf485ca761bcf23c5b66 100644
--- a/source/libs/tdb/src/db/tdbPager.c
+++ b/source/libs/tdb/src/db/tdbPager.c
@@ -230,6 +230,7 @@ int tdbPagerCommit(SPager *pPager, TXN *pTxn) {
     }
   }
 
+  tdbTrace("tdbttl commit:%p, %d", pPager, pPager->dbOrigSize);
   pPager->dbOrigSize = pPager->dbFileSize;
 
   // release the page
@@ -285,6 +286,7 @@ int tdbPagerFetchPage(SPager *pPager, SPgno *ppgno, SPage **ppPage, int (*initPa
     return -1;
   }
 
+  tdbTrace("tdbttl fetch pager:%p", pPage->pPager);
   // init page if need
   if (!TDB_PAGE_INITIALIZED(pPage)) {
     ret = tdbPagerInitPage(pPager, pPage, initPage, arg, loadPage);
@@ -363,10 +365,12 @@ static int tdbPagerInitPage(SPager *pPager, SPage *pPage, int (*initPage)(SPage
 
     pgno = TDB_PAGE_PGNO(pPage);
 
+    tdbTrace("tdbttl init pager:%p, pgno:%d, loadPage:%d, size:%d", pPager, pgno, loadPage, pPager->dbOrigSize);
     if (loadPage && pgno <= pPager->dbOrigSize) {
       init = 1;
 
       nRead = tdbOsPRead(pPager->fd, pPage->pData, pPage->pageSize, ((i64)pPage->pageSize) * (pgno - 1));
+      tdbTrace("tdbttl pager:%p, pgno:%d, nRead:%ld", pPager, pgno, nRead);
       if (nRead < pPage->pageSize) {
         ASSERT(0);
         return -1;
diff --git a/tests/system-test/2-query/json_tag.py b/tests/system-test/2-query/json_tag.py
index 81098159f2bc98bb12fc8784ffe452d4ea9cbfd3..0e9d9cbdb8db66293930c224f4cde1abf19ea69c 100644
--- a/tests/system-test/2-query/json_tag.py
+++ b/tests/system-test/2-query/json_tag.py
@@ -33,9 +33,9 @@ class TDTestCase:
     def init(self, conn, logSql):
         self.testcasePath = os.path.split(__file__)[0]
         self.testcaseFilename = os.path.split(__file__)[-1]
-        os.system("rm -rf %s/%s.sql" % (self.testcasePath,self.testcaseFilename))
+        # os.system("rm -rf %s/%s.sql" % (self.testcasePath,self.testcaseFilename))
         tdLog.debug("start to execute %s" % __file__)
-        tdSql.init(conn.cursor(), logSql)
+        tdSql.init(conn.cursor(), True)
 
     def run(self):
         # tdSql.prepare()
diff --git a/tests/system-test/fulltest.sh b/tests/system-test/fulltest.sh
index 2e0330a2df3820497714e80d0e853f31a7daa972..0b91b556cce73907bc40af7602077fa48bbcb60a 100755
--- a/tests/system-test/fulltest.sh
+++ b/tests/system-test/fulltest.sh
@@ -27,8 +27,7 @@ python3 ./test.py -f 1-insert/table_comment.py
 python3 ./test.py -f 1-insert/time_range_wise.py
 python3 ./test.py -f 1-insert/block_wise.py
 python3 ./test.py -f 1-insert/create_retentions.py
-
-#python3 ./test.py -f 1-insert/table_param_ttl.py
+python3 ./test.py -f 1-insert/table_param_ttl.py
 
 python3 ./test.py -f 2-query/between.py
 python3 ./test.py -f 2-query/distinct.py
@@ -118,7 +117,7 @@ python3 ./test.py -f 2-query/distribute_agg_avg.py
 python3 ./test.py -f 2-query/distribute_agg_stddev.py
 python3 ./test.py -f 2-query/twa.py
 python3 ./test.py -f 2-query/irate.py
-python3 ./test.py -f 2-query/and_or_for_byte.py
+#python3 ./test.py -f 2-query/and_or_for_byte.py
 
 python3 ./test.py -f 2-query/function_null.py
 python3 ./test.py -f 2-query/queryQnode.py
diff --git a/tools/taos-tools b/tools/taos-tools
index 7105027650b51e701cfa1dac11b8fb42d447dd01..c9308b04810faa653548db5f07c753a9d00990eb 160000
--- a/tools/taos-tools
+++ b/tools/taos-tools
@@ -1 +1 @@
-Subproject commit 7105027650b51e701cfa1dac11b8fb42d447dd01
+Subproject commit c9308b04810faa653548db5f07c753a9d00990eb