refactor: opt perf in tsdbread.

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

@@ -192,6 +192,7 @@ static SVersionRange getQueryVerRange(SVnode* pVnode, SQueryTableDataCond* pCond
 static int64_t       getCurrentKeyInLastBlock(SLastBlockReader* pLastBlockReader);
 static bool          hasDataInLastBlock(SLastBlockReader* pLastBlockReader);
 static int32_t       doBuildDataBlock(STsdbReader* pReader);
+static TSDBKEY       getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbReader* pReader);
 
 static int32_t setColumnIdSlotList(STsdbReader* pReader, SSDataBlock* pBlock) {
   SBlockLoadSuppInfo* pSupInfo = &pReader->suppInfo;
@@ -682,12 +683,154 @@ static SFileDataBlockInfo* getCurrentBlockInfo(SDataBlockIter* pBlockIter) {
 
 static SDataBlk* getCurrentBlock(SDataBlockIter* pBlockIter) { return &pBlockIter->block; }
 
+int32_t binarySearchForTs(char* pValue, int num, TSKEY key, int order) {
+  int32_t midPos = -1;
+  int32_t numOfRows;
+
+  ASSERT(order == TSDB_ORDER_ASC || order == TSDB_ORDER_DESC);
+
+  TSKEY*  keyList = (TSKEY*)pValue;
+  int32_t firstPos = 0;
+  int32_t lastPos = num - 1;
+
+  if (order == TSDB_ORDER_DESC) {
+    // find the first position which is smaller than the key
+    while (1) {
+      if (key >= keyList[firstPos]) return firstPos;
+      if (key == keyList[lastPos]) return lastPos;
+
+      if (key < keyList[lastPos]) {
+        lastPos += 1;
+        if (lastPos >= num) {
+          return -1;
+        } else {
+          return lastPos;
+        }
+      }
+
+      numOfRows = lastPos - firstPos + 1;
+      midPos = (numOfRows >> 1) + firstPos;
+
+      if (key < keyList[midPos]) {
+        firstPos = midPos + 1;
+      } else if (key > keyList[midPos]) {
+        lastPos = midPos - 1;
+      } else {
+        break;
+      }
+    }
+
+  } else {
+    // find the first position which is bigger than the key
+    while (1) {
+      if (key <= keyList[firstPos]) return firstPos;
+      if (key == keyList[lastPos]) return lastPos;
+
+      if (key > keyList[lastPos]) {
+        lastPos = lastPos + 1;
+        if (lastPos >= num)
+          return -1;
+        else
+          return lastPos;
+      }
+
+      numOfRows = lastPos - firstPos + 1;
+      midPos = (numOfRows >> 1u) + firstPos;
+
+      if (key < keyList[midPos]) {
+        lastPos = midPos - 1;
+      } else if (key > keyList[midPos]) {
+        firstPos = midPos + 1;
+      } else {
+        break;
+      }
+    }
+  }
+
+  return midPos;
+}
+
+static int doBinarySearchKey(TSKEY* keyList, int num, int pos, TSKEY key, int order) {
+  // start end position
+  int s, e;
+  s = pos;
+
+  // check
+  assert(pos >=0 && pos < num);
+  assert(num > 0);
+
+  if (order == TSDB_ORDER_ASC) {
+    // find the first position which is smaller than the key
+    e  = num - 1;
+    if (key < keyList[pos])
+      return -1;
+    while (1) {
+      // check can return
+      if (key >= keyList[e])
+        return e;
+      if (key <= keyList[s])
+        return s;
+      if (e - s <= 1)
+        return s;
+
+      // change start or end position
+      int mid = s + (e - s + 1)/2;
+      if (keyList[mid] > key)
+        e = mid;
+      else if(keyList[mid] < key)
+        s = mid;
+      else
+        return mid;
+    }
+  } else { // DESC
+    // find the first position which is bigger than the key
+    e  = 0;
+    if (key > keyList[pos])
+      return -1;
+    while (1) {
+      // check can return
+      if (key <= keyList[e])
+        return e;
+      if (key >= keyList[s])
+        return s;
+      if (s - e <= 1)
+        return s;
+
+      // change start or end position
+      int mid = s - (s - e + 1)/2;
+      if (keyList[mid] < key)
+        e = mid;
+      else if(keyList[mid] > key)
+        s = mid;
+      else
+        return mid;
+    }
+  }
+}
+
+int32_t getEndPosInDataBlock(STsdbReader* pReader, SBlockData* pBlockData, SDataBlk* pBlock, int32_t pos) {
+  // NOTE: reverse the order to find the end position in data block
+  int32_t endPos = -1;
+  bool asc = ASCENDING_TRAVERSE(pReader->order);
+
+  if (asc && pReader->window.ekey >= pBlock->maxKey.ts) {
+    endPos = pBlock->nRow - 1;
+  } else if (!asc && pReader->window.skey <= pBlock->minKey.ts) {
+    endPos = 0;
+  } else {
+    endPos = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, pReader->window.ekey, pReader->order);
+    assert(endPos != -1);
+  }
+
+  return endPos;
+}
+
 static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo) {
   SReaderStatus*  pStatus = &pReader->status;
   SDataBlockIter* pBlockIter = &pStatus->blockIter;
 
   SBlockData*         pBlockData = &pStatus->fileBlockData;
-  SFileDataBlockInfo* pFBlock = getCurrentBlockInfo(pBlockIter);
+  SFileDataBlockInfo* pBlockInfo = getCurrentBlockInfo(pBlockIter);
   SDataBlk*           pBlock = getCurrentBlock(pBlockIter);
   SSDataBlock*        pResBlock = pReader->pResBlock;
   int32_t             numOfOutputCols = blockDataGetNumOfCols(pResBlock);
@@ -701,20 +844,27 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
   int32_t step = asc ? 1 : -1;
 
   int32_t rowIndex = 0;
-  int32_t remain = asc ? (pBlockData->nRow - pDumpInfo->rowIndex) : (pDumpInfo->rowIndex + 1);
-
-  int32_t endIndex = 0;
-  if (remain <= pReader->capacity) {
-    endIndex = pBlockData->nRow;
+  if (asc && pReader->window.skey <= pBlock->minKey.ts) {
+    pDumpInfo->rowIndex = 0;
+  } else if (!asc && pReader->window.ekey >= pBlock->maxKey.ts) {
+    pDumpInfo->rowIndex = pBlock->nRow - 1;
   } else {
-    endIndex = pDumpInfo->rowIndex + step * pReader->capacity;
+    int32_t pos = asc? pBlock->nRow-1:0;
+    int32_t order = (pReader->order == TSDB_ORDER_ASC)? TSDB_ORDER_DESC:TSDB_ORDER_ASC;
+    pDumpInfo->rowIndex = doBinarySearchKey(pBlockData->aTSKEY, pBlock->nRow, pos, pReader->window.skey, order);
+  }
+
+  // time window check
+  int32_t endIndex = getEndPosInDataBlock(pReader, pBlockData, pBlock, pDumpInfo->rowIndex) + step;
+  int32_t remain = asc ? (endIndex - pDumpInfo->rowIndex) : (pDumpInfo->rowIndex - endIndex);
+  if (remain > pReader->capacity) { // output buffer check
     remain = pReader->capacity;
   }
 
-  int32_t          i = 0;
+  int32_t i = 0;
   SColumnInfoData* pColData = taosArrayGet(pResBlock->pDataBlock, i);
   if (pColData->info.colId == PRIMARYKEY_TIMESTAMP_COL_ID) {
-    for (int32_t j = pDumpInfo->rowIndex; j < endIndex && j >= 0; j += step) {
+    for (int32_t j = pDumpInfo->rowIndex; rowIndex < remain; j += step) {
       colDataAppend(pColData, rowIndex++, (const char*)&pBlockData->aTSKEY[j], false);
     }
     i += 1;
@@ -730,7 +880,7 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
     if (pData->cid < pColData->info.colId) {
       colIndex += 1;
     } else if (pData->cid == pColData->info.colId) {
-      for (int32_t j = pDumpInfo->rowIndex; j < endIndex && j >= 0; j += step) {
+      for (int32_t j = pDumpInfo->rowIndex; rowIndex < remain; j += step) {
         tColDataGetValue(pData, j, &cv);
         doCopyColVal(pColData, rowIndex++, i, &cv, pSupInfo);
       }
@@ -752,7 +902,10 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
   pResBlock->info.rows = remain;
   pDumpInfo->rowIndex += step * remain;
 
-  setBlockAllDumped(pDumpInfo, pBlock->maxKey.ts, pReader->order);
+  if ((pDumpInfo->rowIndex >= pBlock->nRow && asc) ||(pDumpInfo->rowIndex < 0 && !asc)) {
+    int64_t k = asc? pBlock->maxKey.ts:pBlock->minKey.ts;
+    setBlockAllDumped(pDumpInfo, k, pReader->order);
+  }
 
   double elapsedTime = (taosGetTimestampUs() - st) / 1000.0;
   pReader->cost.blockLoadTime += elapsedTime;
@@ -760,7 +913,7 @@ static int32_t copyBlockDataToSDataBlock(STsdbReader* pReader, STableBlockScanIn
   int32_t unDumpedRows = asc ? pBlock->nRow - pDumpInfo->rowIndex : pDumpInfo->rowIndex + 1;
   tsdbDebug("%p copy file block to sdatablock, global index:%d, table index:%d, brange:%" PRId64 "-%" PRId64
             ", rows:%d, remain:%d, minVer:%" PRId64 ", maxVer:%" PRId64 ", elapsed time:%.2f ms, %s",
-            pReader, pBlockIter->index, pFBlock->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, remain, unDumpedRows,
+            pReader, pBlockIter->index, pBlockInfo->tbBlockIdx, pBlock->minKey.ts, pBlock->maxKey.ts, remain, unDumpedRows,
             pBlock->minVer, pBlock->maxVer, elapsedTime, pReader->idStr);
 
   return TSDB_CODE_SUCCESS;
@@ -1148,26 +1301,31 @@ static bool overlapWithDelSkyline(STableBlockScanInfo* pBlockScanInfo, const SDa
   }
 }
 
-// 1. the version of all rows should be less than the endVersion
-// 2. current block should not overlap with next neighbor block
-// 3. current timestamp should not be overlap with each other
-// 4. output buffer should be large enough to hold all rows in current block
-// 5. delete info should not overlap with current block data
-static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pFBlock, SDataBlk* pBlock,
-                                STableBlockScanInfo* pScanInfo, TSDBKEY key, SLastBlockReader* pLastBlockReader) {
+typedef struct {
+  bool overlapWithNeighborBlock;
+  bool hasDupTs;
+  bool overlapWithDelInfo;
+  bool overlapWithLastBlock;
+  bool overlapWithKeyInBuf;
+  bool partiallyRequired;
+  bool moreThanCapcity;
+} SDataBlockToLoadInfo;
+
+static void getBlockToLoadInfo(SDataBlockToLoadInfo* pInfo, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
+                               STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader,
+                               STsdbReader* pReader) {
   int32_t   neighborIndex = 0;
-  SDataBlk* pNeighbor = getNeighborBlockOfSameTable(pFBlock, pScanInfo, &neighborIndex, pReader->order);
+  SDataBlk* pNeighbor = getNeighborBlockOfSameTable(pBlockInfo, pScanInfo, &neighborIndex, pReader->order);
 
   // overlap with neighbor
-  bool overlapWithNeighbor = false;
   if (pNeighbor) {
-    overlapWithNeighbor = overlapWithNeighborBlock(pBlock, pNeighbor, pReader->order);
+    pInfo->overlapWithNeighborBlock = overlapWithNeighborBlock(pBlock, pNeighbor, pReader->order);
     taosMemoryFree(pNeighbor);
   }
 
   // has duplicated ts of different version in this block
-  bool hasDup = (pBlock->nSubBlock == 1) ? pBlock->hasDup : true;
-  bool overlapWithDel = overlapWithDelSkyline(pScanInfo, pBlock, pReader->order);
+  pInfo->hasDupTs = (pBlock->nSubBlock == 1) ? pBlock->hasDup : true;
+  pInfo->overlapWithDelInfo = overlapWithDelSkyline(pScanInfo, pBlock, pReader->order);
 
   // todo here we need to each key in the last files to identify if it is really overlapped with last block
   // todo
@@ -1179,25 +1337,48 @@ static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pFBloc
   }
 #endif
 
-  bool moreThanOutputCapacity = pBlock->nRow > pReader->capacity;
-  bool partiallyRequired = dataBlockPartiallyRequired(&pReader->window, &pReader->verRange, pBlock);
-  bool overlapWithKey = keyOverlapFileBlock(key, pBlock, &pReader->verRange);
+  pInfo->moreThanCapcity = pBlock->nRow > pReader->capacity;
+  pInfo->partiallyRequired = dataBlockPartiallyRequired(&pReader->window, &pReader->verRange, pBlock);
+  pInfo->overlapWithKeyInBuf = keyOverlapFileBlock(keyInBuf, pBlock, &pReader->verRange);
+}
 
-  bool loadDataBlock = (overlapWithNeighbor || hasDup || partiallyRequired || overlapWithKey ||
-                        moreThanOutputCapacity || overlapWithDel || overlapWithlastBlock);
+// 1. the version of all rows should be less than the endVersion
+// 2. current block should not overlap with next neighbor block
+// 3. current timestamp should not be overlap with each other
+// 4. output buffer should be large enough to hold all rows in current block
+// 5. delete info should not overlap with current block data
+// 6. current block should not contain the duplicated ts
+static bool fileBlockShouldLoad(STsdbReader* pReader, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
+                                STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader) {
+  SDataBlockToLoadInfo info = {0};
+  getBlockToLoadInfo(&info, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader, pReader);
+
+  bool loadDataBlock =
+      (info.overlapWithNeighborBlock || info.hasDupTs || info.partiallyRequired || info.overlapWithKeyInBuf ||
+       info.moreThanCapcity || info.overlapWithDelInfo || info.overlapWithLastBlock);
 
   // log the reason why load the datablock for profile
   if (loadDataBlock) {
     tsdbDebug("%p uid:%" PRIu64
               " need to load the datablock, overlapwithneighborblock:%d, hasDup:%d, partiallyRequired:%d, "
               "overlapWithKey:%d, greaterThanBuf:%d, overlapWithDel:%d, overlapWithlastBlock:%d, %s",
-              pReader, pFBlock->uid, overlapWithNeighbor, hasDup, partiallyRequired, overlapWithKey,
-              moreThanOutputCapacity, overlapWithDel, overlapWithlastBlock, pReader->idStr);
+              pReader, pBlockInfo->uid, info.overlapWithNeighborBlock, info.hasDupTs, info.partiallyRequired,
+              info.overlapWithKeyInBuf, info.moreThanCapcity, info.overlapWithDelInfo, info.overlapWithLastBlock,
+              pReader->idStr);
   }
 
   return loadDataBlock;
 }
 
+static bool isCleanFileDataBlock(STsdbReader* pReader, SFileDataBlockInfo* pBlockInfo, SDataBlk* pBlock,
+                                 STableBlockScanInfo* pScanInfo, TSDBKEY keyInBuf, SLastBlockReader* pLastBlockReader) {
+  SDataBlockToLoadInfo info = {0};
+  getBlockToLoadInfo(&info, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader, pReader);
+  bool isCleanFileBlock = !(info.overlapWithNeighborBlock || info.hasDupTs || info.overlapWithKeyInBuf ||
+                            info.overlapWithDelInfo || info.overlapWithLastBlock);
+  return isCleanFileBlock;
+}
+
 static int32_t buildDataBlockFromBuf(STsdbReader* pReader, STableBlockScanInfo* pBlockScanInfo, int64_t endKey) {
   if (!(pBlockScanInfo->iiter.hasVal || pBlockScanInfo->iter.hasVal)) {
     return TSDB_CODE_SUCCESS;
@@ -2020,20 +2201,29 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
   SSDataBlock* pResBlock = pReader->pResBlock;
 
   SFileDataBlockInfo* pBlockInfo = getCurrentBlockInfo(&pReader->status.blockIter);
+  SLastBlockReader*   pLastBlockReader = pReader->status.fileIter.pLastBlockReader;
+
+  int64_t st = taosGetTimestampUs();
 
   STableBlockScanInfo* pBlockScanInfo = NULL;
   if (pBlockInfo != NULL) {
     pBlockScanInfo = taosHashGet(pReader->status.pTableMap, &pBlockInfo->uid, sizeof(pBlockInfo->uid));
-  } else {
+    SDataBlk* pBlock = getCurrentBlock(&pReader->status.blockIter);
+    TSDBKEY keyInBuf = getCurrentKeyInBuf(pBlockScanInfo, pReader);
+
+    // it is a clean block, load it directly
+    if (isCleanFileDataBlock(pReader, pBlockInfo, pBlock, pBlockScanInfo, keyInBuf, pLastBlockReader)) {
+      copyBlockDataToSDataBlock(pReader, pBlockScanInfo);
+      goto _end;
+    }
+  } else {  // file blocks not exist
     pBlockScanInfo = pReader->status.pTableIter;
   }
 
-  SLastBlockReader*   pLastBlockReader = pReader->status.fileIter.pLastBlockReader;
   SFileBlockDumpInfo* pDumpInfo = &pReader->status.fBlockDumpInfo;
   SBlockData*         pBlockData = &pReader->status.fileBlockData;
   int32_t             step = ASCENDING_TRAVERSE(pReader->order) ? 1 : -1;
 
-  int64_t st = taosGetTimestampUs();
 
   while (1) {
     // todo check the validate of row in file block
@@ -2076,6 +2266,7 @@ static int32_t buildComposedDataBlock(STsdbReader* pReader) {
     }
   }
 
+  _end:
   pResBlock->info.uid = pBlockScanInfo->uid;
   blockDataUpdateTsWindow(pResBlock, 0);
 
@@ -2179,7 +2370,7 @@ _err:
   return code;
 }
 
-static TSDBKEY getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbReader* pReader) {
+TSDBKEY getCurrentKeyInBuf(STableBlockScanInfo* pScanInfo, STsdbReader* pReader) {
   TSDBKEY  key = {.ts = TSKEY_INITIAL_VAL};
   TSDBROW* pRow = getValidMemRow(&pScanInfo->iter, pScanInfo->delSkyline, pReader);
   if (pRow != NULL) {
@@ -2375,12 +2566,12 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
   }
 
   initLastBlockReader(pLastBlockReader, pScanInfo, pReader);
-  TSDBKEY key = getCurrentKeyInBuf(pScanInfo, pReader);
+  TSDBKEY keyInBuf = getCurrentKeyInBuf(pScanInfo, pReader);
 
   if (pBlockInfo == NULL) {  // build data block from last data file
     ASSERT(pBlockIter->numOfBlocks == 0);
     code = buildComposedDataBlock(pReader);
-  } else if (fileBlockShouldLoad(pReader, pBlockInfo, pBlock, pScanInfo, key, pLastBlockReader)) {
+  } else if (fileBlockShouldLoad(pReader, pBlockInfo, pBlock, pScanInfo, keyInBuf, pLastBlockReader)) {
     tBlockDataReset(&pStatus->fileBlockData);
     code = tBlockDataInit(&pStatus->fileBlockData, pReader->suid, pScanInfo->uid, pReader->pSchema);
     if (code != TSDB_CODE_SUCCESS) {
@@ -2394,7 +2585,7 @@ static int32_t doBuildDataBlock(STsdbReader* pReader) {
 
     // build composed data block
     code = buildComposedDataBlock(pReader);
-  } else if (bufferDataInFileBlockGap(pReader->order, key, pBlock)) {
+  } else if (bufferDataInFileBlockGap(pReader->order, keyInBuf, pBlock)) {
     // data in memory that are earlier than current file block
     // todo rows in buffer should be less than the file block in asc, greater than file block in desc
     int64_t endKey = (ASCENDING_TRAVERSE(pReader->order)) ? pBlock->minKey.ts : pBlock->maxKey.ts;