[td-2895] refactor.

src/inc/ttype.h

@@ -174,7 +174,7 @@ bool isValidDataType(int32_t type);
 void  setVardataNull(char* val, int32_t type);
 void  setNull(char *val, int32_t type, int32_t bytes);
 void  setNullN(char *val, int32_t type, int32_t bytes, int32_t numOfElems);
-void* getNullValue(int32_t type);
+void *getNullValue(int32_t type);
 
 void assignVal(char *val, const char *src, int32_t len, int32_t type);
 void tsDataSwap(void *pLeft, void *pRight, int32_t type, int32_t size, void* buf);

src/query/inc/qExecutor.h

@@ -86,7 +86,7 @@ typedef struct SResultRow {
   bool          closed;      // this result status: closed or opened
   uint32_t      numOfRows;   // number of rows of current time window
   SResultRowCellInfo*  pCellInfo;  // For each result column, there is a resultInfo
-  union {STimeWindow win; char* key;};  // start key of current time window
+  union {STimeWindow win; char* key;};  // start key of current result row
 } SResultRow;
 
 typedef struct SGroupResInfo {
@@ -131,7 +131,6 @@ typedef struct SSingleColumnFilterInfo {
 typedef struct STableQueryInfo {
   TSKEY       lastKey;
   int32_t     groupIndex;     // group id in table list
-  int16_t     queryRangeSet;  // denote if the query range is set, only available for interval query
   tVariant    tag;
   STimeWindow win;
   STSCursor   cur;
@@ -409,6 +408,7 @@ typedef struct SFillOperatorInfo {
 typedef struct SGroupbyOperatorInfo {
   SOptrBasicInfo binfo;
   int32_t        colIndex;
+  char          *prevData;   // previous group by value
 } SGroupbyOperatorInfo;
 
 void freeParam(SQueryParam *param);

src/query/src/qAggMain.c

@@ -2167,12 +2167,7 @@ static void last_row_finalizer(SQLFunctionCtx *pCtx) {
   // do nothing at the first stage
   SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
   if (pResInfo->hasResult != DATA_SET_FLAG) {
-    if (pCtx->outputType == TSDB_DATA_TYPE_BINARY || pCtx->outputType == TSDB_DATA_TYPE_NCHAR) {
-      setVardataNull(pCtx->pOutput, pCtx->outputType);
-    } else {
     setNull(pCtx->pOutput, pCtx->outputType, pCtx->outputBytes);
-    }
-    
     return;
   }
   

src/query/src/qExecutor.c

@@ -190,9 +190,8 @@ static void destroyOperatorInfo(SOperatorInfo* pOperator);
 static int32_t doCopyToSDataBlock(SQueryRuntimeEnv* pRuntimeEnv, SGroupResInfo* pGroupResInfo, int32_t orderType, SSDataBlock* pBlock);
 
 static int32_t getGroupbyColumnIndex(SSqlGroupbyExpr *pGroupbyExpr, SSDataBlock* pDataBlock);
+static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SGroupbyOperatorInfo *pInfo, int32_t numOfCols, char *pData, int16_t type, int16_t bytes, int32_t groupIndex);
 
-static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo* pResultRowInfo,
-                                          SQLFunctionCtx * pCtx, int32_t numOfCols, char *pData, int16_t type, int16_t bytes, int32_t groupIndex, int32_t* offset);
 static void initCtxOutputBuffer(SQLFunctionCtx* pCtx, int32_t size);
 static void getAlignQueryTimeWindow(SQuery *pQuery, int64_t key, int64_t keyFirst, int64_t keyLast, STimeWindow *win);
 static bool isPointInterpoQuery(SQuery *pQuery);
@@ -1283,27 +1282,38 @@ static void hashIntervalAgg(SOperatorInfo* pOperatorInfo, SResultRowInfo* pResul
   }
 }
 
-static void hashGroupbyAgg(SQueryRuntimeEnv *pRuntimeEnv, SOperatorInfo* pOperator, SGroupbyOperatorInfo *pInfo,
-                           SSDataBlock *pSDataBlock) {
-  SQuery *pQuery = pRuntimeEnv->pQuery;
-
-  STableQueryInfo* item = pQuery->current;
+static void doHashGroupbyAgg(SOperatorInfo* pOperator, SGroupbyOperatorInfo *pInfo, SSDataBlock *pSDataBlock) {
+  SQueryRuntimeEnv* pRuntimeEnv = pOperator->pRuntimeEnv;
+  STableQueryInfo*  item = pRuntimeEnv->pQuery->current;
 
   SColumnInfoData* pColInfoData = taosArrayGet(pSDataBlock->pDataBlock, pInfo->colIndex);
   int16_t          bytes = pColInfoData->info.bytes;
   int16_t          type = pColInfoData->info.type;
 
+  if (type == TSDB_DATA_TYPE_FLOAT || type == TSDB_DATA_TYPE_DOUBLE) {
+    qError("QInfo:%p group by not supported on double/float columns, abort", pRuntimeEnv->qinfo);
+    return;
+  }
+
   for (int32_t j = 0; j < pSDataBlock->info.rows; ++j) {
-    char *val = pColInfoData->pData + bytes * j;
-    if (isNull(val, type)) {  // TODO: ignore the null value
+    char* val = pColInfoData->pData + bytes * j;
+    if (isNull(val, type)) {
       continue;
     }
 
-    // TODO compare with the previous value to speedup the query processing
-    int32_t ret = setGroupResultOutputBuf(pRuntimeEnv, &pInfo->binfo.resultRowInfo, pInfo->binfo.pCtx, pOperator->numOfOutput, val, type, bytes, item->groupIndex, pInfo->binfo.rowCellInfoOffset);
+    if (pInfo->prevData == NULL || (memcmp(pInfo->prevData, val, bytes) != 0)) {
+      if (pInfo->prevData == NULL) {
+        pInfo->prevData = malloc(bytes);
+      }
+
+      memcpy(pInfo->prevData, val, bytes);
+
+      int32_t ret =
+          setGroupResultOutputBuf(pRuntimeEnv, pInfo, pOperator->numOfOutput, val, type, bytes, item->groupIndex);
       if (ret != TSDB_CODE_SUCCESS) {  // null data, too many state code
         longjmp(pRuntimeEnv->env, TSDB_CODE_QRY_APP_ERROR);
       }
+    }
 
     for (int32_t k = 0; k < pOperator->numOfOutput; ++k) {
       pInfo->binfo.pCtx[k].size = 1;  // TODO refactor: extract from here
@@ -1315,25 +1325,7 @@ static void hashGroupbyAgg(SQueryRuntimeEnv *pRuntimeEnv, SOperatorInfo* pOperat
   }
 }
 
-static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SResultRowInfo* pResultRowInfo,
-    SQLFunctionCtx * pCtx, int32_t numOfCols, char *pData, int16_t type, int16_t bytes, int32_t groupIndex, int32_t* rowCellInfoOffset) {
-  SDiskbasedResultBuf *pResultBuf = pRuntimeEnv->pResultBuf;
-
-  // not assign result buffer yet, add new result buffer, TODO remove it
-  char* d = pData;
-  int16_t len = bytes;
-  if (type == TSDB_DATA_TYPE_BINARY||type == TSDB_DATA_TYPE_NCHAR) {
-    d = varDataVal(pData);
-    len = varDataLen(pData);
-  } else if (type == TSDB_DATA_TYPE_FLOAT || type == TSDB_DATA_TYPE_DOUBLE) {
-    SQInfo* pQInfo = pRuntimeEnv->qinfo;
-    qError("QInfo:%p group by not supported on double/float columns, abort", pQInfo);
-    return -1;
-  }
-
-  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, d, len, true, groupIndex);
-  assert (pResultRow != NULL);
-
+static void setResultRowKey(SResultRow* pResultRow, char* pData, int16_t type) {
   int64_t v = -1;
   GET_TYPED_DATA(v, int64_t, type, pData);
   if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
@@ -1347,7 +1339,27 @@ static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SResultRow
     pResultRow->win.skey = v;
     pResultRow->win.ekey = v;
   }
+}
+
+static int32_t setGroupResultOutputBuf(SQueryRuntimeEnv *pRuntimeEnv, SGroupbyOperatorInfo *pInfo, int32_t numOfCols, char *pData, int16_t type, int16_t bytes, int32_t groupIndex) {
+  SDiskbasedResultBuf *pResultBuf = pRuntimeEnv->pResultBuf;
+
+  int32_t        *rowCellInfoOffset = pInfo->binfo.rowCellInfoOffset;
+  SResultRowInfo *pResultRowInfo    = &pInfo->binfo.resultRowInfo;
+  SQLFunctionCtx *pCtx              = pInfo->binfo.pCtx;
+
+  // not assign result buffer yet, add new result buffer, TODO remove it
+  char* d = pData;
+  int16_t len = bytes;
+  if (type == TSDB_DATA_TYPE_BINARY || type == TSDB_DATA_TYPE_NCHAR) {
+    d = varDataVal(pData);
+    len = varDataLen(pData);
+  }
+
+  SResultRow *pResultRow = doPrepareResultRowFromKey(pRuntimeEnv, pResultRowInfo, d, len, true, groupIndex);
+  assert (pResultRow != NULL);
 
+  setResultRowKey(pResultRow, pData, type);
   if (pResultRow->pageId == -1) {
     int32_t ret = addNewWindowResultBuf(pResultRow, pResultBuf, groupIndex, pRuntimeEnv->pQuery->resultRowSize);
     if (ret != 0) {
@@ -4654,7 +4666,7 @@ static SSDataBlock* doSTableIntervalAgg(void* param) {
   return pIntervalInfo->pRes;
 }
 
-static SSDataBlock* doHashGroupbyAgg(void* param) {
+static SSDataBlock* hashGroupbyAggregate(void* param) {
   SOperatorInfo* pOperator = (SOperatorInfo*) param;
   if (pOperator->status == OP_EXEC_DONE) {
     return NULL;
@@ -4688,16 +4700,14 @@ static SSDataBlock* doHashGroupbyAgg(void* param) {
       pInfo->colIndex = getGroupbyColumnIndex(pRuntimeEnv->pQuery->pGroupbyExpr, pBlock);
     }
 
-    hashGroupbyAgg(pRuntimeEnv, pOperator, pInfo, pBlock);
+    doHashGroupbyAgg(pOperator, pInfo, pBlock);
   }
 
   pOperator->status = OP_RES_TO_RETURN;
   closeAllResultRows(&pInfo->binfo.resultRowInfo);
   setQueryStatus(pRuntimeEnv, QUERY_COMPLETED);
 
-  // todo need finalize the result
-  if (!pRuntimeEnv->pQuery->stableQuery) {
-    // finalize include the update of result rows
+  if (!pRuntimeEnv->pQuery->stableQuery) { // finalize include the update of result rows
     finalizeQueryResult(pOperator, pInfo->binfo.pCtx, &pInfo->binfo.resultRowInfo, pInfo->binfo.rowCellInfoOffset);
   } else {
     updateNumOfRowsInResultRows(pRuntimeEnv, pInfo->binfo.pCtx, pOperator->numOfOutput, &pInfo->binfo.resultRowInfo, pInfo->binfo.rowCellInfoOffset);
@@ -4830,6 +4840,7 @@ static void destroySFillOperatorInfo(void* param, int32_t numOfOutput) {
 static void destroyGroupbyOperatorInfo(void* param, int32_t numOfOutput) {
   SGroupbyOperatorInfo* pInfo = (SGroupbyOperatorInfo*) param;
   doDestroyBasicInfo(&pInfo->binfo, numOfOutput);
+  tfree(pInfo->prevData);
 }
 
 static void destroyArithOperatorInfo(void* param, int32_t numOfOutput) {
@@ -5000,7 +5011,7 @@ SOperatorInfo* createGroupbyOperatorInfo(SQueryRuntimeEnv* pRuntimeEnv, SOperato
   pOperator->numOfOutput  = numOfOutput;
   pOperator->info         = pInfo;
   pOperator->pRuntimeEnv  = pRuntimeEnv;
-  pOperator->exec         = doHashGroupbyAgg;
+  pOperator->exec         = hashGroupbyAggregate;
   pOperator->cleanup      = destroyGroupbyOperatorInfo;
 
   return pOperator;