refactor(query): add additional attribute to denote if current block has already loaded data.

include/common/tcommon.h

@@ -195,6 +195,7 @@ typedef struct SDataBlockInfo {
   uint32_t    capacity;
   SBlockID    id;
   int16_t     hasVarCol;
+  int16_t     dataLoad;   // denote if the data is loaded or not
 
   // TODO: optimize and remove following
   int64_t     version;    // used for stream, and need serialization

source/common/src/tdatablock.c

@@ -358,7 +358,7 @@ size_t blockDataGetNumOfCols(const SSDataBlock* pBlock) { return taosArrayGetSiz
 size_t blockDataGetNumOfRows(const SSDataBlock* pBlock) { return pBlock->info.rows; }
 
 int32_t blockDataUpdateTsWindow(SSDataBlock* pDataBlock, int32_t tsColumnIndex) {
-  if (pDataBlock == NULL || pDataBlock->info.rows <= 0) {
+  if (pDataBlock == NULL || pDataBlock->info.rows <= 0 || pDataBlock->info.dataLoad == 0) {
     return 0;
   }
 
@@ -1157,13 +1157,14 @@ void blockDataEmpty(SSDataBlock* pDataBlock) {
   }
 
   pInfo->rows = 0;
+  pInfo->dataLoad = 0;
   pInfo->window.ekey = 0;
   pInfo->window.skey = 0;
 }
 
 // todo temporarily disable it
 static int32_t doEnsureCapacity(SColumnInfoData* pColumn, const SDataBlockInfo* pBlockInfo, uint32_t numOfRows, bool clearPayload) {
-  ASSERT(numOfRows > 0 /*&& pBlockInfo->capacity >= pBlockInfo->rows*/);
+  ASSERT(numOfRows > 0);
   if (numOfRows <= pBlockInfo->capacity) {
     return TSDB_CODE_SUCCESS;
   }
@@ -2427,6 +2428,7 @@ const char* blockDecode(SSDataBlock* pBlock, const char* pData) {
     pStart += colLen[i];
   }
 
+  pBlock->info.dataLoad = 1;
   pBlock->info.rows = numOfRows;
   ASSERT(pStart - pData == dataLen);
   return pStart;

source/dnode/vnode/src/tsdb/tsdbRead.c

@@ -1143,6 +1143,7 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
     i += 1;
   }
 
+  pResBlock->info.dataLoad = 1;
   pResBlock->info.rows = dumpedRows;
   pDumpInfo->rowIndex += step * dumpedRows;
 
@@ -2538,6 +2539,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
 
 _end:
   pResBlock->info.id.uid = (pBlockScanInfo != NULL) ? pBlockScanInfo->uid : 0;
+  pResBlock->info.dataLoad = 1;
   blockDataUpdateTsWindow(pResBlock, pReader->suppInfo.slotId[0]);
 
   setComposedBlockFlag(pReader, true);
@@ -3622,6 +3624,7 @@ int32_t doAppendRowFromTSRow(SSDataBlock* pBlock, STsdbReader* pReader, STSRow*
     i += 1;
   }
 
+  pBlock->info.dataLoad = 1;
   pBlock->info.rows += 1;
   pScanInfo->lastKey = pTSRow->ts;
   return TSDB_CODE_SUCCESS;
@@ -3669,6 +3672,7 @@ int32_t doAppendRowFromFileBlock(SSDataBlock* pResBlock, STsdbReader* pReader, S
     i += 1;
   }
 
+  pResBlock->info.dataLoad = 1;
   pResBlock->info.rows += 1;
   return TSDB_CODE_SUCCESS;
 }