diff --git a/include/libs/function/function.h b/include/libs/function/function.h
index 39d8ec3420..b15d5ad33a 100644
--- a/include/libs/function/function.h
+++ b/include/libs/function/function.h
@@ -254,6 +254,7 @@ typedef struct SMultiFunctionsDesc {
   bool interpQuery;
   bool distinct;
   bool join;
+  bool continueQuery;
 } SMultiFunctionsDesc;
 
 int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionId, int32_t param, SResultDataInfo* pInfo, int16_t extLength,
diff --git a/include/libs/planner/plannerOp.h b/include/libs/planner/plannerOp.h
index 2793e72635..42d3307ac8 100644
--- a/include/libs/planner/plannerOp.h
+++ b/include/libs/planner/plannerOp.h
@@ -23,6 +23,7 @@
   #error To use this include file, first define either INCLUDE_AS_ENUM or INCLUDE_AS_NAME
 #endif
 
+OP_ENUM_MACRO(StreamScan)
 OP_ENUM_MACRO(TableScan)
 OP_ENUM_MACRO(DataBlocksOptScan)
 OP_ENUM_MACRO(TableSeqScan)
diff --git a/source/client/src/clientImpl.c b/source/client/src/clientImpl.c
index 34ab1fb05a..159a92b0ab 100644
--- a/source/client/src/clientImpl.c
+++ b/source/client/src/clientImpl.c
@@ -394,6 +394,9 @@ TAOS_RES *taos_create_topic(TAOS* taos, const char* topicName, const char* sql,
   CHECK_CODE_GOTO(buildRequest(pTscObj, sql, sqlLen, &pRequest), _return);
   CHECK_CODE_GOTO(parseSql(pRequest, &pQueryNode), _return);
 
+  SQueryStmtInfo* pQueryStmtInfo = (SQueryStmtInfo* ) pQueryNode;
+  pQueryStmtInfo->info.continueQuery = true;
+
   // todo check for invalid sql statement and return with error code
 
   CHECK_CODE_GOTO(qCreateQueryDag(pQueryNode, &pRequest->body.pDag, pRequest->requestId), _return);
@@ -403,6 +406,8 @@ TAOS_RES *taos_create_topic(TAOS* taos, const char* topicName, const char* sql,
     goto _return;
   }
 
+  printf("%s\n", pStr);
+
   // The topic should be related to a database that the queried table is belonged to.
   SName name = {0};
   char dbName[TSDB_DB_FNAME_LEN] = {0};
diff --git a/source/client/test/clientTests.cpp b/source/client/test/clientTests.cpp
index 440ef0d728..736a47273f 100644
--- a/source/client/test/clientTests.cpp
+++ b/source/client/test/clientTests.cpp
@@ -525,30 +525,30 @@ TEST(testCase, driverInit_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);
@@ -646,36 +646,36 @@ TEST(testCase, driverInit_Test) {
 //  taos_close(pConn);
 //}
 
-TEST(testCase, agg_query_tables) {
-  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
-  ASSERT_NE(pConn, nullptr);
-
-  TAOS_RES* pRes = taos_query(pConn, "use dbv");
-  taos_free_result(pRes);
-
-  pRes = taos_query(pConn, "create table tx using st tags(111111111111111)");
-  if (taos_errno(pRes) != 0) {
-    printf("failed to create table, reason:%s\n", taos_errstr(pRes));
-  }
-  taos_free_result(pRes);
-
-  pRes = taos_query(pConn, "select count(*) from tu");
-  if (taos_errno(pRes) != 0) {
-    printf("failed to select from table, reason:%s\n", taos_errstr(pRes));
-    taos_free_result(pRes);
-    ASSERT_TRUE(false);
-  }
-
-  TAOS_ROW    pRow = NULL;
-  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
-  int32_t     numOfFields = taos_num_fields(pRes);
-
-  char str[512] = {0};
-  while ((pRow = taos_fetch_row(pRes)) != NULL) {
-    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
-    printf("%s\n", str);
-  }
-
-  taos_free_result(pRes);
-  taos_close(pConn);
-}
\ No newline at end of file
+//TEST(testCase, agg_query_tables) {
+//  TAOS* pConn = taos_connect("localhost", "root", "taosdata", NULL, 0);
+//  ASSERT_NE(pConn, nullptr);
+//
+//  TAOS_RES* pRes = taos_query(pConn, "use dbv");
+//  taos_free_result(pRes);
+//
+//  pRes = taos_query(pConn, "create table tx using st tags(111111111111111)");
+//  if (taos_errno(pRes) != 0) {
+//    printf("failed to create table, reason:%s\n", taos_errstr(pRes));
+//  }
+//  taos_free_result(pRes);
+//
+//  pRes = taos_query(pConn, "select count(*) from tu");
+//  if (taos_errno(pRes) != 0) {
+//    printf("failed to select from table, reason:%s\n", taos_errstr(pRes));
+//    taos_free_result(pRes);
+//    ASSERT_TRUE(false);
+//  }
+//
+//  TAOS_ROW    pRow = NULL;
+//  TAOS_FIELD* pFields = taos_fetch_fields(pRes);
+//  int32_t     numOfFields = taos_num_fields(pRes);
+//
+//  char str[512] = {0};
+//  while ((pRow = taos_fetch_row(pRes)) != NULL) {
+//    int32_t code = taos_print_row(str, pRow, pFields, numOfFields);
+//    printf("%s\n", str);
+//  }
+//
+//  taos_free_result(pRes);
+//  taos_close(pConn);
+//}
\ No newline at end of file
diff --git a/source/dnode/vnode/src/tq/tq.c b/source/dnode/vnode/src/tq/tq.c
index ead856a06b..e5f84a8d8d 100644
--- a/source/dnode/vnode/src/tq/tq.c
+++ b/source/dnode/vnode/src/tq/tq.c
@@ -13,6 +13,7 @@
  * along with this program. If not, see <http://www.gnu.org/licenses/>.
  */
 
+#include "../../../../../include/libs/executor/executor.h"
 #include "tqInt.h"
 #include "tqMetaStore.h"
 
@@ -766,3 +767,32 @@ SArray* tqRetrieveDataBlock(STqReadHandle* pHandle) {
  * status) {*/
 /*return 0;*/
 /*}*/
+
+static qTaskInfo_t createExecTaskInfo(SSubQueryMsg *pMsg, void* pStreamBlockReadHandle) {
+  if (pMsg == NULL || pStreamBlockReadHandle == NULL) {
+    return NULL;
+  }
+
+  // print those info into log
+  pMsg->sId = be64toh(pMsg->sId);
+  pMsg->queryId = be64toh(pMsg->queryId);
+  pMsg->taskId = be64toh(pMsg->taskId);
+  pMsg->contentLen = ntohl(pMsg->contentLen);
+
+  struct SSubplan *plan = NULL;
+  int32_t code = qStringToSubplan(pMsg->msg, &plan);
+  if (code != TSDB_CODE_SUCCESS) {
+    terrno = code;
+    return NULL;
+  }
+
+  qTaskInfo_t pTaskInfo = NULL;
+  code = qCreateExecTask(pStreamBlockReadHandle, 0, plan, &pTaskInfo, NULL);
+  if (code != TSDB_CODE_SUCCESS) {
+    // TODO: destroy SSubplan & pTaskInfo
+    terrno = code;
+    return NULL;
+  }
+
+  return pTaskInfo;
+}
\ No newline at end of file
diff --git a/source/libs/executor/inc/executorimpl.h b/source/libs/executor/inc/executorimpl.h
index 2fe3392b25..73a30a62f5 100644
--- a/source/libs/executor/inc/executorimpl.h
+++ b/source/libs/executor/inc/executorimpl.h
@@ -253,12 +253,8 @@ typedef struct SExecTaskInfo {
 
   STableGroupInfo tableqinfoGroupInfo;  // this is a group array list, including SArray<STableQueryInfo*> structure
   pthread_mutex_t lock;        // used to synchronize the rsp/query threads
-//  tsem_t           ready;
-//  int32_t          dataReady;   // denote if query result is ready or not
-//  void*            rspContext;  // response context
   char           *sql;         // query sql string
   jmp_buf         env;         //
-  DataSinkHandle  dsHandle;
   struct SOperatorInfo  *pRoot;
 } SExecTaskInfo;
 
@@ -666,6 +662,6 @@ int32_t getMaximumIdleDurationSec();
 
 void doInvokeUdf(struct SUdfInfo* pUdfInfo, SQLFunctionCtx *pCtx, int32_t idx, int32_t type);
 void setTaskStatus(SExecTaskInfo *pTaskInfo, int8_t status);
-int32_t doCreateExecTaskInfo(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, void* readerHandle);
+int32_t createExecTaskInfoImpl(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, void* readerHandle);
 
 #endif  // TDENGINE_EXECUTORIMPL_H
diff --git a/source/libs/executor/src/executorMain.c b/source/libs/executor/src/executorMain.c
index f39df4d4ae..f5c13ef782 100644
--- a/source/libs/executor/src/executorMain.c
+++ b/source/libs/executor/src/executorMain.c
@@ -69,11 +69,11 @@ void freeParam(STaskParam *param) {
   tfree(param->prevResult);
 }
 
-int32_t qCreateExecTask(void* tsdb, int32_t vgId, SSubplan* pSubplan, qTaskInfo_t* pTaskInfo, DataSinkHandle* handle) {
-  assert(tsdb != NULL && pSubplan != NULL);
+int32_t qCreateExecTask(void* readHandle, int32_t vgId, SSubplan* pSubplan, qTaskInfo_t* pTaskInfo, DataSinkHandle* handle) {
+  assert(readHandle != NULL && pSubplan != NULL);
   SExecTaskInfo** pTask = (SExecTaskInfo**)pTaskInfo;
 
-  int32_t code = doCreateExecTaskInfo(pSubplan, pTask, tsdb);
+  int32_t code = createExecTaskInfoImpl(pSubplan, pTask, readHandle);
   if (code != TSDB_CODE_SUCCESS) {
     goto _error;
   }
@@ -84,11 +84,9 @@ int32_t qCreateExecTask(void* tsdb, int32_t vgId, SSubplan* pSubplan, qTaskInfo_
     goto _error;
   }
 
-  code = dsCreateDataSinker(pSubplan->pDataSink, &(*pTask)->dsHandle);
+  code = dsCreateDataSinker(pSubplan->pDataSink, handle);
 
-  *handle = (*pTask)->dsHandle;
-
-_error:
+  _error:
   // if failed to add ref for all tables in this query, abort current query
   return code;
 }
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index dc4d9c7238..e2beb43fa8 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -7778,22 +7778,26 @@ static tsdbReadHandleT doCreateDataReadHandle(STableScanPhyNode* pTableScanNode,
   return NULL;
 }
 
-int32_t doCreateExecTaskInfo(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, void* readerHandle) {
-  tsdbReadHandleT tReaderHandle = NULL;
-
-  int32_t code = 0;
+int32_t createExecTaskInfoImpl(SSubplan* pPlan, SExecTaskInfo** pTaskInfo, void* readerHandle) {
   uint64_t queryId = pPlan->id.queryId;
 
-  SPhyNode* pPhyNode = pPlan->pNode;
-
+  int32_t code = TSDB_CODE_SUCCESS;
   *pTaskInfo = createExecTaskInfo(queryId);
+  if (*pTaskInfo == NULL) {
+    code = TSDB_CODE_QRY_OUT_OF_MEMORY;
+    goto _complete;
+  }
 
   (*pTaskInfo)->pRoot = doCreateOperatorTreeNode(pPlan->pNode, *pTaskInfo, readerHandle, queryId);
   if ((*pTaskInfo)->pRoot == NULL) {
-    return terrno;
+    code = TSDB_CODE_QRY_OUT_OF_MEMORY;
   }
 
-  return TSDB_CODE_SUCCESS;
+_complete:
+  tfree(*pTaskInfo);
+
+  terrno = code;
+  return code;
 }
 
 /**
diff --git a/source/libs/planner/inc/plannerInt.h b/source/libs/planner/inc/plannerInt.h
index 4ff8364198..41f50607cb 100644
--- a/source/libs/planner/inc/plannerInt.h
+++ b/source/libs/planner/inc/plannerInt.h
@@ -28,19 +28,20 @@ extern "C" {
 
 #define QNODE_TAGSCAN       1
 #define QNODE_TABLESCAN     2
-#define QNODE_PROJECT       3
-#define QNODE_AGGREGATE     4
-#define QNODE_GROUPBY       5
-#define QNODE_LIMIT         6
-#define QNODE_JOIN          7
-#define QNODE_DISTINCT      8
-#define QNODE_SORT          9
-#define QNODE_UNION         10
-#define QNODE_TIMEWINDOW    11
-#define QNODE_SESSIONWINDOW 12
-#define QNODE_STATEWINDOW   13
-#define QNODE_FILL          14
-#define QNODE_MODIFY        15
+#define QNODE_STREAMSCAN    3
+#define QNODE_PROJECT       4
+#define QNODE_AGGREGATE     5
+#define QNODE_GROUPBY       6
+#define QNODE_LIMIT         7
+#define QNODE_JOIN          8
+#define QNODE_DISTINCT      9
+#define QNODE_SORT          10
+#define QNODE_UNION         11
+#define QNODE_TIMEWINDOW    12
+#define QNODE_SESSIONWINDOW 13
+#define QNODE_STATEWINDOW   14
+#define QNODE_FILL          15
+#define QNODE_MODIFY        16
 
 typedef struct SQueryDistPlanNodeInfo {
   bool      stableQuery;   // super table query or not
diff --git a/source/libs/planner/src/logicPlan.c b/source/libs/planner/src/logicPlan.c
index 9c9ff8fe2b..e817b764d5 100644
--- a/source/libs/planner/src/logicPlan.c
+++ b/source/libs/planner/src/logicPlan.c
@@ -121,6 +121,7 @@ static SQueryPlanNode* createQueryNode(int32_t type, const char* name, SQueryPla
 
   switch(type) {
     case QNODE_TAGSCAN:
+    case QNODE_STREAMSCAN:
     case QNODE_TABLESCAN: {
       SQueryTableInfo* info = calloc(1, sizeof(SQueryTableInfo));
       memcpy(info, pExtInfo, sizeof(SQueryTableInfo));
@@ -195,7 +196,12 @@ static SQueryPlanNode* doAddTableColumnNode(const SQueryStmtInfo* pQueryInfo, SQ
     return pNode;
   }
 
-  SQueryPlanNode*  pNode = createQueryNode(QNODE_TABLESCAN, "TableScan", NULL, 0, NULL, 0, info);
+  SQueryPlanNode* pNode = NULL;
+  if (pQueryInfo->info.continueQuery) {
+    pNode = createQueryNode(QNODE_STREAMSCAN, "StreamScan", NULL, 0, NULL, 0, info);
+  } else {
+    pNode = createQueryNode(QNODE_TABLESCAN, "TableScan", NULL, 0, NULL, 0, info);
+  }
 
   if (!pQueryInfo->info.projectionQuery) {
     SArray* p = pQueryInfo->exprList[0];
@@ -261,7 +267,6 @@ static SQueryPlanNode* doCreateQueryPlanForSingleTableImpl(const SQueryStmtInfo*
       pNode->numOfExpr = num;
       pNode->pExpr = taosArrayInit(num, POINTER_BYTES);
       taosArrayAddAll(pNode->pExpr, p);
-//      pNode = createQueryNode(QNODE_PROJECT, "Projection", &pNode, 1, p->pData, num, NULL);
     }
   }
 
@@ -433,6 +438,7 @@ static int32_t doPrintPlan(char* buf, SQueryPlanNode* pQueryNode, int32_t level,
   int32_t len = len1 + totalLen;
 
   switch(pQueryNode->info.type) {
+    case QNODE_STREAMSCAN:
     case QNODE_TABLESCAN: {
       SQueryTableInfo* pInfo = (SQueryTableInfo*)pQueryNode->pExtInfo;
       len1 = sprintf(buf + len, "%s #%" PRIu64, pInfo->tableName, pInfo->uid);
@@ -643,7 +649,6 @@ int32_t queryPlanToStringImpl(char* buf, SQueryPlanNode* pQueryNode, int32_t lev
 
 int32_t queryPlanToString(struct SQueryPlanNode* pQueryNode, char** str) {
   assert(pQueryNode);
-
   *str = calloc(1, 4096);
 
   int32_t len = sprintf(*str, "===== logic plan =====\n");
diff --git a/source/libs/planner/src/physicalPlan.c b/source/libs/planner/src/physicalPlan.c
index 1e1a97df1f..dd869d87b3 100644
--- a/source/libs/planner/src/physicalPlan.c
+++ b/source/libs/planner/src/physicalPlan.c
@@ -290,7 +290,8 @@ static bool needMultiNodeScan(SQueryTableInfo* pTable) {
 static SPhyNode* createSingleTableScanNode(SQueryPlanNode* pPlanNode, SQueryTableInfo* pTable, SSubplan* subplan) {
   vgroupMsgToEpSet(&(pTable->pMeta->vgroupList->vgroups[0]), &subplan->execNode);
 
-  return createUserTableScanNode(pPlanNode, pTable, OP_TableScan);
+  int32_t type = (pPlanNode->info.type == QNODE_TABLESCAN)? OP_TableScan:OP_StreamScan;
+  return createUserTableScanNode(pPlanNode, pTable, type);
 }
 
 static SPhyNode* createTableScanNode(SPlanContext* pCxt, SQueryPlanNode* pPlanNode) {
@@ -326,6 +327,7 @@ static SPhyNode* createPhyNode(SPlanContext* pCxt, SQueryPlanNode* pPlanNode) {
     case QNODE_TAGSCAN:
       node = createTagScanNode(pPlanNode);
       break;
+    case QNODE_STREAMSCAN:
     case QNODE_TABLESCAN:
       node = createTableScanNode(pCxt, pPlanNode);
       break;
diff --git a/source/libs/planner/src/physicalPlanJson.c b/source/libs/planner/src/physicalPlanJson.c
index 2abb90993b..cf54fdec85 100644
--- a/source/libs/planner/src/physicalPlanJson.c
+++ b/source/libs/planner/src/physicalPlanJson.c
@@ -829,6 +829,7 @@ static bool exchangeNodeFromJson(const cJSON* json, void* obj) {
 static bool specificPhyNodeToJson(const void* obj, cJSON* json) {
   const SPhyNode* phyNode = (const SPhyNode*)obj;
   switch (phyNode->info.type) {
+    case OP_StreamScan:
     case OP_TableScan:
     case OP_DataBlocksOptScan:
     case OP_TableSeqScan:
diff --git a/source/libs/planner/src/planner.c b/source/libs/planner/src/planner.c
index 9b32213ad7..6b3f37741e 100644
--- a/source/libs/planner/src/planner.c
+++ b/source/libs/planner/src/planner.c
@@ -65,9 +65,9 @@ int32_t qCreateQueryDag(const struct SQueryNode* pNode, struct SQueryDag** pDag,
   }
 
   if (pLogicPlan->info.type != QNODE_MODIFY) {
-//   char* str = NULL;
-//   queryPlanToString(pLogicPlan, &str);
-//   printf("%s\n", str);
+   char* str = NULL;
+   queryPlanToString(pLogicPlan, &str);
+   printf("%s\n", str);
   }
 
   code = optimizeQueryPlan(pLogicPlan);