diff --git a/source/dnode/vnode/src/tsdb/tsdbRead.c b/source/dnode/vnode/src/tsdb/tsdbRead.c
index 4f9e419f788a5f04c3bbb7f558964117d5264028..a18533cf5640cba56509b44f18029121fd131e1f 100644
--- a/source/dnode/vnode/src/tsdb/tsdbRead.c
+++ b/source/dnode/vnode/src/tsdb/tsdbRead.c
@@ -1013,11 +1013,20 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
       // pDumpInfo->rowIndex = 0;
     } else if (!asc && pReader->window.ekey >= pBlock->maxKey.ts) {
       // pDumpInfo->rowIndex = pBlock->nRow - 1;
-    } else {
+    } else {  // find the appropriate the start position in current block, and set it to be the current rowIndex
       int32_t pos = asc ? pBlock->nRow - 1 : 0;
       int32_t order = asc ? TSDB_ORDER_DESC : TSDB_ORDER_ASC;
       int64_t key = asc ? pReader->window.skey : pReader->window.ekey;
       pDumpInfo->rowIndex = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, key, order);
+
+      if (pDumpInfo->rowIndex < 0) {
+        tsdbError(
+            "%p failed to locate the start position in current block, global index:%d, table index:%d, brange:%" PRId64
+            "-%" PRId64 ", minVer:%" PRId64 ", maxVer:%" PRId64 " %s",
+            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, pBlock->minVer,
+            pBlock->maxVer, pReader->idStr);
+        return TSDB_CODE_INVALID_PARA;
+      }
     }
   }
 
diff --git a/source/libs/executor/src/sortoperator.c b/source/libs/executor/src/sortoperator.c
index ee7f88e81374f5ef702c33d748b98897bddd95ae..f5dc6cc623ca800cb459923cf69b495e70447360 100644
--- a/source/libs/executor/src/sortoperator.c
+++ b/source/libs/executor/src/sortoperator.c
@@ -46,13 +46,15 @@ SOperatorInfo* createSortOperatorInfo(SOperatorInfo* downstream, SSortPhysiNode*
   pOperator->pTaskInfo = pTaskInfo;
   SDataBlockDescNode* pDescNode = pSortNode->node.pOutputDataBlockDesc;
 
-  int32_t      numOfCols = 0;
-  SSDataBlock* pResBlock = createDataBlockFromDescNode(pDescNode);
-  SExprInfo*   pExprInfo = createExprInfo(pSortNode->pExprs, NULL, &numOfCols);
+  int32_t    numOfCols = 0;
+  SExprInfo* pExprInfo = createExprInfo(pSortNode->pExprs, NULL, &numOfCols);
 
   int32_t numOfOutputCols = 0;
   int32_t code =
       extractColMatchInfo(pSortNode->pTargets, pDescNode, &numOfOutputCols, COL_MATCH_FROM_SLOT_ID, &pInfo->matchInfo);
+  if (code != TSDB_CODE_SUCCESS) {
+    goto _error;
+  }
 
   pOperator->exprSupp.pCtx = createSqlFunctionCtx(pExprInfo, numOfCols, &pOperator->exprSupp.rowEntryInfoOffset);
   initResultSizeInfo(&pOperator->resultInfo, 1024);
@@ -61,7 +63,7 @@ SOperatorInfo* createSortOperatorInfo(SOperatorInfo* downstream, SSortPhysiNode*
     goto _error;
   }
 
-  pInfo->binfo.pRes = pResBlock;
+  pInfo->binfo.pRes = createDataBlockFromDescNode(pDescNode);
   pInfo->pSortInfo = createSortInfo(pSortNode->pSortKeys);
   initLimitInfo(pSortNode->node.pLimit, pSortNode->node.pSlimit, &pInfo->limitInfo);
 
@@ -86,7 +88,10 @@ SOperatorInfo* createSortOperatorInfo(SOperatorInfo* downstream, SSortPhysiNode*
 
 _error:
   pTaskInfo->code = TSDB_CODE_OUT_OF_MEMORY;
-  taosMemoryFree(pInfo);
+  if (pInfo != NULL) {
+    destroySortOperatorInfo(pInfo);
+  }
+
   taosMemoryFree(pOperator);
   return NULL;
 }