fix(query): support query last file.

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

@@ -1279,7 +1279,6 @@ static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pFBloc
   bool overlapWithlastBlock = false;
   if (hasDataInLastBlock(pLastBlockReader)) {
     SBlockL *pBlockL = taosArrayGet(pLastBlockReader->pBlockL, pLastBlockReader->currentBlockIndex);
-//    int64_t ts = getCurrentKeyInLastBlock(pLastBlockReader);
     overlapWithlastBlock = !(pBlock->maxKey.ts < pBlockL->minKey || pBlock->minKey.ts > pBlockL->maxKey);
   }
 
@@ -1358,8 +1357,71 @@ static FORCE_INLINE STSchema* doGetSchemaForTSRow(int32_t sversion, STsdbReader*
   return pReader->pMemSchema;
 }
 
+// todo handle desc
+static int32_t doMergeBufAndFileRows_Rv(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, TSDBROW* pRow,
+                                     SIterInfo* pIter, int64_t key, SLastBlockReader* pLastBlockReader) {
+  SRowMerger          merge = {0};
+  STSRow*             pTSRow = NULL;
+  SBlockData*         pBlockData = &pReader->status.fileBlockData;
+  SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
+
+  int64_t tsLast = getCurrentKeyInLastBlock(pLastBlockReader);
+
+  TSDBKEY  k = TSDBROW_KEY(pRow);
+  TSDBROW  fRow = tsdbRowFromBlockData(pBlockData, pDumpInfo->rowIndex);
+
+  SBlockData* pLastBlockData = &pLastBlockReader->lastBlockData;
+
+  int64_t minKey = INT64_MAX;
+  if (minKey > tsLast) {
+    minKey = tsLast;
+  }
+
+  if (minKey > k.ts) {
+    minKey = k.ts;
+  }
+
+  if (minKey > key && pBlockData->nRow > 0) {
+    minKey = key;
+  }
+
+  // file block ---> last block -----> imem -----> mem
+  bool init = false;
+  if (minKey == key) {
+    init = true;
+    tRowMergerInit(&merge, &fRow, pReader->pSchema);
+    doMergeRowsInFileBlocks(pBlockData, pBlockScanInfo, pReader, &merge);
+  }
+
+  if (minKey == tsLast) {
+    if (!init) {
+      init = true;
+      TSDBROW fRow1 = tsdbRowFromBlockData(pLastBlockData, pLastBlockReader->rowIndex);
+      tRowMergerInit(&merge, &fRow1, pReader->pSchema);
+    }
+
+    doMergeRowsInLastBlock(pLastBlockReader, tsLast, &merge);
+  }
+
+  if (minKey == k.ts) {
+    if (!init) {
+      STSchema* pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(pRow), pReader, pBlockScanInfo->uid);
+      tRowMergerInit(&merge, pRow, pSchema);
+    }
+
+    doMergeRowsInBuf(pIter, pBlockScanInfo->uid, k.ts, pBlockScanInfo->delSkyline, &merge, pReader);
+  }
+
+  tRowMergerGetRow(&merge, &pTSRow);
+  doAppendRowFromTSRow(pReader->pResBlock, pReader, pTSRow, pBlockScanInfo->uid);
+
+  taosMemoryFree(pTSRow);
+  tRowMergerClear(&merge);
+  return TSDB_CODE_SUCCESS;
+}
+
 static int32_t doMergeBufAndFileRows(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, TSDBROW* pRow,
-                                     SIterInfo* pIter, int64_t key) {
+                                     SIterInfo* pIter, int64_t key, SLastBlockReader* pLastBlockReader) {
   SRowMerger          merge = {0};
   STSRow*             pTSRow = NULL;
   SBlockData*         pBlockData = &pReader->status.fileBlockData;
@@ -1431,6 +1493,85 @@ static int32_t doMergeBufAndFileRows(STsdbReader* pReader, STableBlockScanInfo*
   return TSDB_CODE_SUCCESS;
 }
 
+static int32_t doMergeThreeLevelRowsRv(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, SBlockData* pBlockData, SLastBlockReader* pLastBlockReader) {
+  SRowMerger merge = {0};
+  STSRow*    pTSRow = NULL;
+
+  SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
+  SArray*             pDelList = pBlockScanInfo->delSkyline;
+
+  TSDBROW* pRow = getValidRow(&pBlockScanInfo->iter, pDelList, pReader);
+  TSDBROW* piRow = getValidRow(&pBlockScanInfo->iiter, pDelList, pReader);
+  ASSERT(pRow != NULL && piRow != NULL);
+
+  SBlockData* pLastBlockData = &pLastBlockReader->lastBlockData;
+  int64_t tsLast = getCurrentKeyInLastBlock(pLastBlockReader);
+
+  int64_t key = pBlockData->aTSKEY[pDumpInfo->rowIndex];
+
+  TSDBKEY k = TSDBROW_KEY(pRow);
+  TSDBKEY ik = TSDBROW_KEY(piRow);
+
+  int64_t minKey = INT64_MAX;
+  if (minKey > k.ts) {
+    minKey = k.ts;
+  }
+
+  if (minKey > ik.ts) {
+    minKey = ik.ts;
+  }
+
+  if (minKey > key) {
+    minKey = key;
+  }
+
+  if (minKey > tsLast) {
+    minKey = tsLast;
+  }
+
+  // file block ---> last block -----> imem -----> mem
+  bool init = false;
+  if (minKey == key) {
+    init = true;
+    TSDBROW fRow = tsdbRowFromBlockData(pBlockData, pDumpInfo->rowIndex);
+    tRowMergerInit(&merge, &fRow, pReader->pSchema);
+    doMergeRowsInFileBlocks(pBlockData, pBlockScanInfo, pReader, &merge);
+  }
+
+  if (minKey == tsLast) {
+    if (!init) {
+      init = true;
+      TSDBROW fRow1 = tsdbRowFromBlockData(pLastBlockData, pLastBlockReader->rowIndex);
+      tRowMergerInit(&merge, &fRow1, pReader->pSchema);
+    }
+    doMergeRowsInLastBlock(pLastBlockReader, tsLast, &merge);
+  }
+
+  if (minKey == ik.ts) {
+    if (!init) {
+      init = true;
+      STSchema* pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(piRow), pReader, pBlockScanInfo->uid);
+      tRowMergerInit(&merge, piRow, pSchema);
+    }
+    doMergeRowsInBuf(&pBlockScanInfo->iiter, pBlockScanInfo->uid, ik.ts, pBlockScanInfo->delSkyline, &merge, pReader);
+  }
+
+  if (minKey == k.ts) {
+    if (!init) {
+      STSchema* pSchema = doGetSchemaForTSRow(TSDBROW_SVERSION(pRow), pReader, pBlockScanInfo->uid);
+      tRowMergerInit(&merge, pRow, pSchema);
+    }
+    doMergeRowsInBuf(&pBlockScanInfo->iter, pBlockScanInfo->uid, k.ts, pBlockScanInfo->delSkyline, &merge, pReader);
+  }
+
+  tRowMergerGetRow(&merge, &pTSRow);
+  doAppendRowFromTSRow(pReader->pResBlock, pReader, pTSRow, pBlockScanInfo->uid);
+
+  taosMemoryFree(pTSRow);
+  tRowMergerClear(&merge);
+  return TSDB_CODE_SUCCESS;
+}
+
 static int32_t doMergeThreeLevelRows(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, SBlockData* pBlockData) {
   SRowMerger merge = {0};
   STSRow*    pTSRow = NULL;
@@ -1605,8 +1746,8 @@ static bool isValidFileBlockRow(SBlockData* pBlockData, SFileBlockDumpInfo* pDum
 
 static bool outOfTimeWindow(int64_t ts, STimeWindow* pWindow) { return (ts > pWindow->ekey) || (ts < pWindow->skey); }
 
-static void initLastBlockReader(SLastBlockReader* pLastBlockReader, uint64_t uid, STimeWindow* pWin, SVersionRange* pVerRange,
-    int16_t startPos) {
+static void initLastBlockReader(SLastBlockReader* pLastBlockReader, uint64_t uid, STimeWindow* pWin,
+                                SVersionRange* pVerRange, int16_t startPos) {
   pLastBlockReader->uid = uid;
   pLastBlockReader->window = *pWin;
   pLastBlockReader->verRange = *pVerRange;
@@ -1636,10 +1777,12 @@ static bool nextRowInLastBlock(SLastBlockReader *pLastBlockReader) {
 
     // no data any more
     if (pBlockData->aTSKEY[i] > pLastBlockReader->window.ekey) {
+      pLastBlockReader->rowIndex = pBlockData->nRow;
       return false;
     }
 
     if (pBlockData->aVersion[i] > pLastBlockReader->verRange.maxVer) {
+      pLastBlockReader->rowIndex = pBlockData->nRow;
       return false;
     }
 
@@ -1676,25 +1819,21 @@ static bool hasDataInLastBlock(SLastBlockReader* pLastBlockReader) {
 static int32_t buildComposedDataBlockImpl(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, SBlockData* pBlockData, SLastBlockReader *pLastBlockReader) {
   SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
 
-  int64_t key = INT64_MIN;
-  if (pBlockData->nRow > 0) {
-    key = pBlockData->aTSKEY[pDumpInfo->rowIndex];
-  }
-
+  int64_t key = (pBlockData->nRow > 0)? pBlockData->aTSKEY[pDumpInfo->rowIndex]:INT64_MIN;
   TSDBROW* pRow = getValidRow(&pBlockScanInfo->iter, pBlockScanInfo->delSkyline, pReader);
   TSDBROW* piRow = getValidRow(&pBlockScanInfo->iiter, pBlockScanInfo->delSkyline, pReader);
 
   if (pBlockScanInfo->iter.hasVal && pBlockScanInfo->iiter.hasVal) {
-    return doMergeThreeLevelRows(pReader, pBlockScanInfo, pBlockData);
+    return doMergeThreeLevelRowsRv(pReader, pBlockScanInfo, pBlockData, pLastBlockReader);
   } else {
-    // imem + file
+    // imem + file + last block
     if (pBlockScanInfo->iiter.hasVal) {
-      return doMergeBufAndFileRows(pReader, pBlockScanInfo, piRow, &pBlockScanInfo->iiter, key);
+      return doMergeBufAndFileRows_Rv(pReader, pBlockScanInfo, piRow, &pBlockScanInfo->iiter, key, pLastBlockReader);
     }
 
     // mem + file
     if (pBlockScanInfo->iter.hasVal) {
-      return doMergeBufAndFileRows(pReader, pBlockScanInfo, pRow, &pBlockScanInfo->iter, key);
+      return doMergeBufAndFileRows_Rv(pReader, pBlockScanInfo, pRow, &pBlockScanInfo->iter, key, pLastBlockReader);
     }
 
     if (pBlockData->nRow > 0) {
@@ -1704,7 +1843,6 @@ static int32_t buildComposedDataBlockImpl(STsdbReader* pReader, STableBlockScanI
       int64_t ts = getCurrentKeyInLastBlock(pLastBlockReader);
       if (ts < key) {  // save rows in last block
         SBlockData* pLastBlockData = &pLastBlockReader->lastBlockData;
-        int64_t     tsLastBlock = getCurrentKeyInLastBlock(pLastBlockReader);
 
         STSRow*    pTSRow = NULL;
         SRowMerger merge = {0};
@@ -1712,7 +1850,7 @@ static int32_t buildComposedDataBlockImpl(STsdbReader* pReader, STableBlockScanI
         TSDBROW fRow1 = tsdbRowFromBlockData(pLastBlockData, pLastBlockReader->rowIndex);
 
         tRowMergerInit(&merge, &fRow1, pReader->pSchema);
-        doMergeRowsInLastBlock(pLastBlockReader, tsLastBlock, &merge);
+        doMergeRowsInLastBlock(pLastBlockReader, ts, &merge);
         tRowMergerGetRow(&merge, &pTSRow);
 
         doAppendRowFromTSRow(pReader->pResBlock, pReader, pTSRow, pBlockScanInfo->uid);
@@ -1753,6 +1891,7 @@ static int32_t buildComposedDataBlockImpl(STsdbReader* pReader, STableBlockScanI
         }
       }
     } else {  // only last block exists
+      // only last block exits
       SBlockData* pLastBlockData = &pLastBlockReader->lastBlockData;
       int64_t     tsLastBlock = getCurrentKeyInLastBlock(pLastBlockReader);
 
@@ -1820,10 +1959,10 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
     }
 
     buildComposedDataBlockImpl(pReader, pBlockScanInfo, pBlockData, pLastBlockReader);
-    SBlock* pBlock = getCurrentBlock(&pReader->status.blockIter);
 
     // currently loaded file data block is consumed
-    if (pBlockData->nRow > 0 && (pDumpInfo->rowIndex >= pBlock->nRow || pDumpInfo->rowIndex < 0)) {
+    if (pBlockData->nRow > 0 && (pDumpInfo->rowIndex >= pBlockData->nRow || pDumpInfo->rowIndex < 0)) {
+      SBlock* pBlock = getCurrentBlock(&pReader->status.blockIter);
       setBlockAllDumped(pDumpInfo, pBlock, pReader->order);
       break;
     }