feature: add table merge scan operator

source/libs/executor/inc/executorimpl.h

@@ -907,7 +907,8 @@ int32_t compareTimeWindow(const void* p1, const void* p2, const void* param);
 int32_t finalizeResultRowIntoResultDataBlock(SDiskbasedBuf* pBuf, SResultRowPosition* resultRowPosition,
                                        SqlFunctionCtx* pCtx, SExprInfo* pExprInfo, int32_t numOfExprs, const int32_t* rowCellOffset,
                                        SSDataBlock* pBlock, SExecTaskInfo* pTaskInfo);
-
+int32_t getTableList(void* metaHandle, int32_t tableType, uint64_t tableUid, STableListInfo* pListInfo,
+                            SNode* pTagCond);
 #ifdef __cplusplus
 }
 #endif

source/libs/executor/src/executorimpl.c

@@ -4556,8 +4556,6 @@ static tsdbReaderT doCreateDataReader(STableScanPhysiNode* pTableScanNode, SRead
                                       STableListInfo* pTableListInfo, uint64_t queryId, uint64_t taskId,
                                       SNode* pTagCond);
 
-static int32_t getTableList(void* metaHandle, int32_t tableType, uint64_t tableUid, STableListInfo* pListInfo,
-                            SNode* pTagCond);
 static SArray* extractColumnInfo(SNodeList* pNodeList);
 
 static SArray* createSortInfo(SNodeList* pNodeList);

source/libs/executor/src/sortoperator.c

@@ -427,7 +427,7 @@ SOperatorInfo* createMultiwaySortMergeOperatorInfo(SOperatorInfo** downStreams,
   pInfo->pInputBlock = pInputBlock;
   pOperator->name = "MultiwaySortMerge";
   pOperator->operatorType = QUERY_NODE_PHYSICAL_PLAN_MERGE;
-  pOperator->blocking = true;
+  pOperator->blocking = false;
   pOperator->status = OP_NOT_OPENED;
   pOperator->info = pInfo;