diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index 0ca294129701a614128741c37931bf035a0a7b91..415d6a57ce4e1d1cdfcba2510d29cc75aa1607af 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -521,30 +521,30 @@ TEST(testCase, show_stable_Test) {
 //  taosHashCleanup(phash);
 //}
 //
-//TEST(testCase, create_topic_Test) {
-//  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
-//  assert(pConn != NULL);
-//
-//  TAOS_RES* pRes = taos_query(pConn, "use abc1");
-//  if (taos_errno(pRes) != 0) {
-//    printf("error in use db, reason:%s\n", taos_errstr(pRes));
-//  }
-//  taos_free_result(pRes);
-//
-//  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
-//  ASSERT_TRUE(pFields == nullptr);
-//
-//  int32_t numOfFields = taos_num_fields(pRes);
-//  ASSERT_EQ(numOfFields, 0);
-//
-//  taos_free_result(pRes);
-//
-//  char* sql = "select * from tu";
-//  pRes = taos_create_topic(pConn, "test_topic_1", sql, strlen(sql));
-//  taos_free_result(pRes);
-//  taos_close(pConn);
-//}
-//
+TEST(testCase, create_topic_Test) {
+  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+  assert(pConn != NULL);
+
+  TAOS_RES* pRes = taos_query(pConn, "use abc1");
+  if (taos_errno(pRes) != 0) {
+    printf("error in use db, reason:%s\n", taos_errstr(pRes));
+  }
+  taos_free_result(pRes);
+
+  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
+  ASSERT_TRUE(pFields == nullptr);
+
+  int32_t numOfFields = taos_num_fields(pRes);
+  ASSERT_EQ(numOfFields, 0);
+
+  taos_free_result(pRes);
+
+  char* sql = "select * from tu";
+  pRes = taos_create_topic(pConn, "test_topic_1", sql, strlen(sql));
+  taos_free_result(pRes);
+  taos_close(pConn);
+}
+
 //TEST(testCase, insert_test) {
 //  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
 //  ASSERT_NE(pConn, nullptr);
diff --git a/source/dnode/mnode/impl/src/mndTopic.c b/source/dnode/mnode/impl/src/mndTopic.c
index 67aeae0d4c3f35b1637b1d1ec51f2809e28bc4dc..16a9828e714f3bdbf5c6c75767cbc597e9f679af 100644
--- a/source/dnode/mnode/impl/src/mndTopic.c
+++ b/source/dnode/mnode/impl/src/mndTopic.c
@@ -74,6 +74,15 @@ SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic) {
   SDB_SET_INT32(pRaw, dataPos, pTopic->version, TOPIC_ENCODE_OVER);
   SDB_SET_INT32(pRaw, dataPos, pTopic->sqlLen, TOPIC_ENCODE_OVER);
   SDB_SET_BINARY(pRaw, dataPos, pTopic->sql, pTopic->sqlLen, TOPIC_ENCODE_OVER);
+  int32_t logicalPlanLen = strlen(pTopic->logicalPlan) + 1;
+  SDB_SET_INT32(pRaw, dataPos, strlen(pTopic->logicalPlan)+1, TOPIC_ENCODE_OVER);
+  SDB_SET_BINARY(pRaw, dataPos, pTopic->logicalPlan, logicalPlanLen, TOPIC_ENCODE_OVER);
+
+  int32_t physicalPlanLen = strlen(pTopic->physicalPlan) + 1;
+  pTopic->physicalPlan = calloc(physicalPlanLen, sizeof(char));
+  if (pTopic->physicalPlan == NULL) goto TOPIC_ENCODE_OVER;
+  SDB_SET_INT32(pRaw, dataPos, strlen(pTopic->physicalPlan)+1, TOPIC_ENCODE_OVER);
+  SDB_SET_BINARY(pRaw, dataPos, pTopic->physicalPlan, physicalPlanLen, TOPIC_ENCODE_OVER);
 
   SDB_SET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_ENCODE_OVER);
   SDB_SET_DATALEN(pRaw, dataPos, TOPIC_ENCODE_OVER);
@@ -83,6 +92,12 @@ SSdbRaw *mndTopicActionEncode(SMqTopicObj *pTopic) {
 TOPIC_ENCODE_OVER:
   if (terrno != TSDB_CODE_SUCCESS) {
     mError("topic:%s, failed to encode to raw:%p since %s", pTopic->name, pRaw, terrstr());
+    /*if (pTopic->logicalPlan) {*/
+      /*free(pTopic->logicalPlan);*/
+    /*}*/
+    /*if (pTopic->physicalPlan) {*/
+      /*free(pTopic->physicalPlan);*/
+    /*}*/
     sdbFreeRaw(pRaw);
     return NULL;
   }
@@ -121,10 +136,23 @@ SSdbRow *mndTopicActionDecode(SSdbRaw *pRaw) {
 
   pTopic->sql = calloc(pTopic->sqlLen + 1, sizeof(char));
   SDB_GET_BINARY(pRaw, dataPos, pTopic->sql, pTopic->sqlLen, TOPIC_DECODE_OVER);
-//  SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER);
-//  SDB_GET_BINARY(pRaw, dataPos, pTopic->logicalPlan, len, TOPIC_DECODE_OVER);
-//  SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER);
-//  SDB_GET_BINARY(pRaw, dataPos, pTopic->physicalPlan, len, TOPIC_DECODE_OVER);
+
+  SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER);
+  pTopic->logicalPlan = calloc(len+1, sizeof(char));
+  if (pTopic->logicalPlan == NULL) {
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    goto TOPIC_DECODE_OVER;
+  }
+  SDB_GET_BINARY(pRaw, dataPos, pTopic->logicalPlan, len+1, TOPIC_DECODE_OVER);
+
+  SDB_GET_INT32(pRaw, dataPos, &len, TOPIC_DECODE_OVER);
+  pTopic->logicalPlan = calloc(len + 1, sizeof(char));
+  if (pTopic->physicalPlan == NULL) {
+    free(pTopic->logicalPlan);
+    terrno = TSDB_CODE_OUT_OF_MEMORY;
+    goto TOPIC_DECODE_OVER;
+  }
+  SDB_GET_BINARY(pRaw, dataPos, pTopic->physicalPlan, len+1, TOPIC_DECODE_OVER);
 
   SDB_GET_RESERVE(pRaw, dataPos, MND_TOPIC_RESERVE_SIZE, TOPIC_DECODE_OVER)
 
diff --git a/source/dnode/vnode/inc/tq.h b/source/dnode/vnode/inc/tq.h
index 5774131377e3f17ebea76ff70eee767fa876b43d..8089826a80ed945b1716cb19b8489d58c4fc366d 100644
--- a/source/dnode/vnode/inc/tq.h
+++ b/source/dnode/vnode/inc/tq.h
@@ -25,6 +25,7 @@
 #include "trpc.h"
 #include "ttimer.h"
 #include "tutil.h"
+#include "meta.h"
 
 #ifdef __cplusplus
 extern "C" {
@@ -314,6 +315,26 @@ const void* tqDeserializeGroup(const STqSerializedHead*, STqGroup**);
 
 static int tqQueryExecuting(int32_t status) { return status; }
 
+typedef struct STqReadHandle {
+  int64_t ver;
+  SSubmitMsg* pMsg;
+  SSubmitBlk* pBlock;
+  SSubmitMsgIter msgIter;
+  SSubmitBlkIter blkIter;
+  SMeta* pMeta;
+} STqReadHandle;
+
+typedef struct SSubmitBlkScanInfo {
+  
+} SSubmitBlkScanInfo;
+
+STqReadHandle* tqInitSubmitMsgScanner(SMeta* pMeta, SSubmitMsg *pMsg);
+bool tqNextDataBlock(STqReadHandle* pHandle);
+int tqRetrieveDataBlockInfo(STqReadHandle* pHandle, SDataBlockInfo *pBlockInfo);
+//return SArray<SColumnInfoData>
+SArray *tqRetrieveDataBlock(STqReadHandle* pHandle, SArray* pColumnIdList);
+//int tqLoadDataBlock(SExecTaskInfo* pTaskInfo, SSubmitBlkScanInfo* pSubmitBlkScanInfo, SSDataBlock* pBlock, uint32_t status);
+
 #ifdef __cplusplus
 }
 #endif
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index 5ceb062bf2e5efc94c3b324a26a0ac80c92c5dec..a5be0ec29a97934c14612b3b9f187b58f3753ecb 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -607,3 +607,70 @@ int tqItemSSize() {
   // mainly for executor
   return 0;
 }
+
+STqReadHandle* tqInitSubmitMsgScanner(SMeta* pMeta, SSubmitMsg *pMsg) {
+  STqReadHandle* pReadHandle = malloc(sizeof(STqReadHandle));
+  if (pReadHandle == NULL) {
+    return NULL;
+  }
+  pReadHandle->pMeta = pMeta;
+  pReadHandle->pMsg = pMsg;
+  tInitSubmitMsgIter(pMsg, &pReadHandle->msgIter);
+  pReadHandle->ver = -1;
+  return NULL;
+}
+
+bool tqNextDataBlock(STqReadHandle* pHandle) {
+  if(tGetSubmitMsgNext(&pHandle->msgIter, &pHandle->pBlock) < 0) {
+    return false;
+  }
+  return true;
+}
+
+int tqRetrieveDataBlockInfo(STqReadHandle* pHandle, SDataBlockInfo* pBlockInfo) {
+  SMemRow row;
+  int32_t sversion = pHandle->pBlock->sversion;
+  SSchemaWrapper* pSchema = metaGetTableSchema(pHandle->pMeta, pHandle->pBlock->uid, sversion, false);
+  pBlockInfo->numOfCols = pSchema->nCols;
+  pBlockInfo->rows = pHandle->pBlock->numOfRows;
+  pBlockInfo->uid = pHandle->pBlock->uid;
+  //TODO: filter out unused column
+  return 0;
+}
+SArray *tqRetrieveDataBlock(STqReadHandle* pHandle, SArray* pColumnIdList) {
+  int32_t sversion = pHandle->pBlock->sversion;
+  SSchemaWrapper* pSchemaWrapper = metaGetTableSchema(pHandle->pMeta, pHandle->pBlock->uid, sversion, true);
+  STSchema* pTschema = metaGetTbTSchema(pHandle->pMeta, pHandle->pBlock->uid, sversion);
+  SArray *pArray = taosArrayInit(pSchemaWrapper->nCols, sizeof(SColumnInfoData));
+  if (pArray == NULL) {
+    return NULL;
+  }
+  SColumnInfoData colInfo;
+  int sz = pSchemaWrapper->nCols * pSchemaWrapper->pSchema->bytes;
+  colInfo.pData = malloc(sz);
+  if (colInfo.pData == NULL) {
+    return NULL;
+  }
+
+  for (int i = 0; i < pTschema->numOfCols; i++) {
+    //TODO: filter out unused column
+    taosArrayPush(pColumnIdList, &(schemaColAt(pTschema, i)->colId));
+  }
+
+  SMemRow row;
+  int32_t kvIdx;
+  while ((row = tGetSubmitBlkNext(&pHandle->blkIter)) != NULL) {
+    for (int i = 0; i < pTschema->numOfCols && kvIdx < pTschema->numOfCols; i++) {
+    //TODO: filter out unused column
+      STColumn *pCol = schemaColAt(pTschema, i);
+      void* val = tdGetMemRowDataOfColEx(row, pCol->colId, pCol->type, TD_DATA_ROW_HEAD_SIZE + pCol->offset, &kvIdx);
+      //TODO: handle varlen
+      memcpy(POINTER_SHIFT(colInfo.pData, pCol->offset), val, pCol->bytes);
+    }
+  }
+  taosArrayPush(pArray, &colInfo);
+  return pArray;
+}
+/*int tqLoadDataBlock(SExecTaskInfo* pTaskInfo, SSubmitBlkScanInfo* pSubmitBlkScanInfo, SSDataBlock* pBlock, uint32_t status) {*/
+  /*return 0;*/
+/*}*/