diff --git a/source/dnode/vnode/inc/vnode.h b/source/dnode/vnode/inc/vnode.h
index 97eff4804d5c557c7a984dcd1bec4dcd9b1edc7b..f2b791def615973e999f1a742006b252ee4a409c 100644
--- a/source/dnode/vnode/inc/vnode.h
+++ b/source/dnode/vnode/inc/vnode.h
@@ -233,7 +233,6 @@ struct SVnodeCfg {
 };
 
 typedef struct {
-  TSKEY    lastKey;
   uint64_t uid;
   uint64_t groupId;
 } STableKeyInfo;
diff --git a/source/dnode/vnode/src/vnd/vnodeQuery.c b/source/dnode/vnode/src/vnd/vnodeQuery.c
index 0e443ee3b8e436fd97f5a5f9a71de9b6483eadb6..1c3e2f0514df46769786b05b7e529ab4913b5cea 100644
--- a/source/dnode/vnode/src/vnd/vnodeQuery.c
+++ b/source/dnode/vnode/src/vnd/vnodeQuery.c
@@ -270,7 +270,7 @@ int32_t vnodeGetAllTableList(SVnode *pVnode, uint64_t uid, SArray *list) {
       break;
     }
 
-    STableKeyInfo info = {.lastKey = TSKEY_INITIAL_VAL, uid = id};
+    STableKeyInfo info = {uid = id};
     taosArrayPush(list, &info);
   }
 
diff --git a/source/libs/executor/src/executil.c b/source/libs/executor/src/executil.c
index 60799e052815fb5d4a0b0347457209075d244c6e..0792b0f8357a5562289016ba7741be22ec47886b 100644
--- a/source/libs/executor/src/executil.c
+++ b/source/libs/executor/src/executil.c
@@ -324,7 +324,7 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
       }
 
       for (int i = 0; i < taosArrayGetSize(res); i++) {
-        STableKeyInfo info = {.lastKey = TSKEY_INITIAL_VAL, .uid = *(uint64_t*)taosArrayGet(res, i), .groupId = 0};
+        STableKeyInfo info = {.uid = *(uint64_t*)taosArrayGet(res, i), .groupId = 0};
         taosArrayPush(pListInfo->pTableList, &info);
       }
       taosArrayDestroy(res);
@@ -338,7 +338,7 @@ int32_t getTableList(void* metaHandle, void* pVnode, SScanPhysiNode* pScanNode,
       return code;
     }
   } else {  // Create one table group.
-    STableKeyInfo info = {.lastKey = 0, .uid = tableUid, .groupId = 0};
+    STableKeyInfo info = {.uid = tableUid, .groupId = 0};
     taosArrayPush(pListInfo->pTableList, &info);
   }
 
diff --git a/source/libs/executor/src/executor.c b/source/libs/executor/src/executor.c
index 0bf294f33dde47a93646e955c1fa607a1853e220..0aa50cdb0a6ab8e964adfb48c42595a3d6699431 100644
--- a/source/libs/executor/src/executor.c
+++ b/source/libs/executor/src/executor.c
@@ -174,7 +174,7 @@ static SArray* filterQualifiedChildTables(const SStreamScanInfo* pScanInfo, cons
   SMetaReader mr = {0};
   metaReaderInit(&mr, pScanInfo->readHandle.meta, 0);
   for (int32_t i = 0; i < taosArrayGetSize(tableIdList); ++i) {
-    int64_t* id = (int64_t*)taosArrayGet(tableIdList, i);
+    uint64_t* id = (uint64_t*)taosArrayGet(tableIdList, i);
 
     int32_t code = metaGetTableEntryByUid(&mr, *id);
     if (code != TSDB_CODE_SUCCESS) {
@@ -189,7 +189,7 @@ static SArray* filterQualifiedChildTables(const SStreamScanInfo* pScanInfo, cons
 
     if (pScanInfo->pTagCond != NULL) {
       bool          qualified = false;
-      STableKeyInfo info = {.groupId = 0, .uid = mr.me.uid, .lastKey = 0};
+      STableKeyInfo info = {.groupId = 0, .uid = mr.me.uid};
       code = isTableOk(&info, pScanInfo->pTagCond, pScanInfo->readHandle.meta, &qualified);
       if (code != TSDB_CODE_SUCCESS) {
         qError("failed to filter new table, uid:0x%" PRIx64 ", %s", info.uid, idstr);
@@ -201,9 +201,7 @@ static SArray* filterQualifiedChildTables(const SStreamScanInfo* pScanInfo, cons
       }
     }
 
-    /*pScanInfo->pStreamScanOp->pTaskInfo->tableqinfoList.*/
     // handle multiple partition
-
     taosArrayPush(qa, id);
   }
 
@@ -227,6 +225,19 @@ int32_t qUpdateQualifiedTableId(qTaskInfo_t tinfo, const SArray* tableIdList, bo
 
     qDebug(" %d qualified child tables added into stream scanner", (int32_t)taosArrayGetSize(qa));
     code = tqReaderAddTbUidList(pScanInfo->tqReader, qa);
+    if (code != TSDB_CODE_SUCCESS) {
+      return code;
+    }
+
+    // add to qTaskInfo
+    // todo refactor STableList
+    for(int32_t i = 0; i < taosArrayGetSize(qa); ++i) {
+      uint64_t* uid = taosArrayGet(qa, i);
+
+      STableKeyInfo keyInfo = {.uid = *uid, .groupId = 0};
+      taosArrayPush(pTaskInfo->tableqinfoList.pTableList, &keyInfo);
+    }
+
     taosArrayDestroy(qa);
   } else {  // remove the table id in current list
     qDebug(" %d remove child tables from the stream scanner", (int32_t)taosArrayGetSize(tableIdList));
diff --git a/source/libs/executor/src/executorimpl.c b/source/libs/executor/src/executorimpl.c
index 44d1cc0965bfcc5de0a35a970e136b036e638b92..5d5eded1323274794dfd27e847748841dab5ceb7 100644
--- a/source/libs/executor/src/executorimpl.c
+++ b/source/libs/executor/src/executorimpl.c
@@ -4455,7 +4455,7 @@ SOperatorInfo* createOperatorTree(SPhysiNode* pPhyNode, SExecTaskInfo* pTaskInfo
           return NULL;
         }
       } else {  // Create one table group.
-        STableKeyInfo info = {.lastKey = 0, .uid = pBlockNode->uid, .groupId = 0};
+        STableKeyInfo info = {.uid = pBlockNode->uid, .groupId = 0};
         taosArrayPush(pTableListInfo->pTableList, &info);
       }
 
diff --git a/source/libs/function/src/builtinsimpl.c b/source/libs/function/src/builtinsimpl.c
index 25648fdea4b4e6d63302d43188d97e535109eef3..59e330d019d083eaef07c7545c51aaa70ca99900 100644
--- a/source/libs/function/src/builtinsimpl.c
+++ b/source/libs/function/src/builtinsimpl.c
@@ -2464,9 +2464,7 @@ bool apercentileFunctionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResult
 int32_t apercentileFunction(SqlFunctionCtx* pCtx) {
   int32_t              numOfElems = 0;
   SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
-
   SInputColumnInfoData* pInput = &pCtx->input;
-  // SColumnDataAgg*       pAgg = pInput->pColumnDataAgg[0];
 
   SColumnInfoData* pCol = pInput->pData[0];
   int32_t          type = pCol->info.type;
@@ -2499,6 +2497,9 @@ int32_t apercentileFunction(SqlFunctionCtx* pCtx) {
       GET_TYPED_DATA(v, double, type, data);
       tHistogramAdd(&pInfo->pHisto, v);
     }
+
+    qDebug("add %d elements into histogram, total:%d, numOfEntry:%d, %p", numOfElems, pInfo->pHisto->numOfElems,
+        pInfo->pHisto->numOfEntries, pInfo->pHisto);
   }
 
   SET_VAL(pResInfo, numOfElems, 1);
@@ -2537,11 +2538,19 @@ static void apercentileTransferInfo(SAPercentileInfo* pInput, SAPercentileInfo*
     if (pHisto->numOfElems <= 0) {
       memcpy(pHisto, pInput->pHisto, sizeof(SHistogramInfo) + sizeof(SHistBin) * (MAX_HISTOGRAM_BIN + 1));
       pHisto->elems = (SHistBin*)((char*)pHisto + sizeof(SHistogramInfo));
+
+      qDebug("merge histo, total:%"PRId64", entry:%d, %p", pHisto->numOfElems, pHisto->numOfEntries, pHisto);
     } else {
       pHisto->elems = (SHistBin*)((char*)pHisto + sizeof(SHistogramInfo));
+      qDebug("input histogram, elem:%"PRId64", entry:%d, %p", pHisto->numOfElems, pHisto->numOfEntries,
+          pInput->pHisto);
+
       SHistogramInfo* pRes = tHistogramMerge(pHisto, pInput->pHisto, MAX_HISTOGRAM_BIN);
       memcpy(pHisto, pRes, sizeof(SHistogramInfo) + sizeof(SHistBin) * MAX_HISTOGRAM_BIN);
       pHisto->elems = (SHistBin*)((char*)pHisto + sizeof(SHistogramInfo));
+
+      qDebug("merge histo, total:%"PRId64", entry:%d, %p", pHisto->numOfElems, pHisto->numOfEntries,
+          pHisto);
       tHistogramDestroy(&pRes);
     }
   }
@@ -2557,14 +2566,18 @@ int32_t apercentileFunctionMerge(SqlFunctionCtx* pCtx) {
 
   SAPercentileInfo* pInfo = GET_ROWCELL_INTERBUF(pResInfo);
 
-  int32_t start = pInput->startRowIndex;
+  qDebug("total %d rows will merge, %p", pInput->numOfRows, pInfo->pHisto);
 
+  int32_t start = pInput->startRowIndex;
   for (int32_t i = start; i < start + pInput->numOfRows; ++i) {
-    char*             data = colDataGetData(pCol, i);
+    char* data = colDataGetData(pCol, i);
+
     SAPercentileInfo* pInputInfo = (SAPercentileInfo*)varDataVal(data);
     apercentileTransferInfo(pInputInfo, pInfo);
   }
 
+  qDebug("after merge, total:%d, numOfEntry:%d, %p", pInfo->pHisto->numOfElems, pInfo->pHisto->numOfEntries, pInfo->pHisto);
+
   SET_VAL(pResInfo, 1, 1);
   return TSDB_CODE_SUCCESS;
 }
@@ -2582,6 +2595,8 @@ int32_t apercentileFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
     }
   } else {
     if (pInfo->pHisto->numOfElems > 0) {
+      qDebug("get the final res:%d, elements:%"PRId64", entry:%d", pInfo->pHisto->numOfElems, pInfo->pHisto->numOfEntries);
+
       double  ratio[] = {pInfo->percent};
       double* res = tHistogramUniform(pInfo->pHisto, ratio, 1);
       pInfo->result = *res;
@@ -2635,6 +2650,9 @@ int32_t apercentileCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx)
   SResultRowEntryInfo* pSResInfo = GET_RES_INFO(pSourceCtx);
   SAPercentileInfo*    pSBuf = GET_ROWCELL_INTERBUF(pSResInfo);
   ASSERT(pDBuf->algo == pSBuf->algo);
+
+  qDebug("start to combine apercentile, %p", pDBuf->pHisto);
+
   apercentileTransferInfo(pSBuf, pDBuf);
   pDResInfo->numOfRes = TMAX(pDResInfo->numOfRes, pSResInfo->numOfRes);
   return TSDB_CODE_SUCCESS;