select histogram(col) from childtable/super table support

src/client/src/tscSQLParser.c

@@ -3331,6 +3331,58 @@ int32_t addExprAndResultField(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, int32_t col
 
       return TSDB_CODE_SUCCESS;
     }
+
+    case TSDB_FUNC_HISTOGRAM: {
+      tSqlExprItem* pParamElem = taosArrayGet(pItem->pNode->Expr.paramList, 0);
+      if (pParamElem->pNode->tokenId != TK_ID) {
+        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg2);
+      }
+
+      SColumnIndex index = COLUMN_INDEX_INITIALIZER;
+      if (getColumnIndexByName(&pParamElem->pNode->columnName, pQueryInfo, &index, tscGetErrorMsgPayload(pCmd)) != TSDB_CODE_SUCCESS) {
+        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
+      }
+
+      if (index.columnIndex == TSDB_TBNAME_COLUMN_INDEX) {
+        return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg6);
+      }
+
+      pTableMetaInfo = tscGetMetaInfo(pQueryInfo, index.tableIndex);
+      SSchema* pSchema = tscGetTableColumnSchema(pTableMetaInfo->pTableMeta, index.columnIndex);
+
+      int32_t numBins = 4;
+      int16_t  resultType = pSchema->type;
+      int32_t  resultSize = pSchema->bytes;
+      int32_t  interResult = 0;
+      getResultDataInfo(pSchema->type, pSchema->bytes, functionId, numBins, &resultType, &resultSize, &interResult, 0, false,
+                        pUdfInfo);
+      SExprInfo* pExpr = NULL;
+      pExpr = tscExprAppend(pQueryInfo, functionId, &index, resultType, resultSize, getNewResColId(pCmd), interResult, false);
+      tscExprAddParams(&pExpr->base, (char*)&numBins, TSDB_DATA_TYPE_INT, sizeof(int32_t));
+      double* intervals = malloc((numBins + 1) * sizeof(double));
+      intervals[0] = -DBL_MAX;
+      intervals[1] = 10;
+      intervals[2] = 20;
+      intervals[3] = 30;
+      intervals[4] = DBL_MAX;
+      tscExprAddParams(&pExpr->base, (char*)intervals, TSDB_DATA_TYPE_BINARY, sizeof(double)*(numBins+1));
+
+      memset(pExpr->base.aliasName, 0, tListLen(pExpr->base.aliasName));
+      getColumnName(pItem, pExpr->base.aliasName, pExpr->base.token,sizeof(pExpr->base.aliasName) - 1);
+      // todo refactor: tscColumnListInsert part
+      SColumnList ids = createColumnList(1, index.tableIndex, index.columnIndex);
+
+      if (finalResult) {
+        insertResultField(pQueryInfo, colIndex, &ids, resultSize, (int8_t)resultType, pExpr->base.aliasName, pExpr);
+      } else {
+        assert(ids.num == 1);
+        tscColumnListInsert(pQueryInfo->colList, ids.ids[0].columnIndex, pExpr->base.uid, pSchema);
+      }
+
+      tscInsertPrimaryTsSourceColumn(pQueryInfo, pExpr->base.uid);
+      return TSDB_CODE_SUCCESS;
+    }
+
     default: {
       assert(!TSDB_FUNC_IS_SCALAR(functionId));
       pUdfInfo = isValidUdf(pQueryInfo->pUdfInfo, pItem->pNode->Expr.operand.z, pItem->pNode->Expr.operand.n);
@@ -3703,7 +3755,8 @@ int32_t tscTansformFuncForSTableQuery(SQueryInfo* pQueryInfo) {
     if ((functionId >= TSDB_FUNC_SUM && functionId <= TSDB_FUNC_TWA) ||
         (functionId >= TSDB_FUNC_FIRST_DST && functionId <= TSDB_FUNC_STDDEV_DST) ||
         (functionId >= TSDB_FUNC_RATE && functionId <= TSDB_FUNC_IRATE) ||
-        (functionId == TSDB_FUNC_SAMPLE) || (functionId == TSDB_FUNC_ELAPSED)) {
+        (functionId == TSDB_FUNC_SAMPLE) ||
+        (functionId == TSDB_FUNC_ELAPSED) || (functionId == TSDB_FUNC_HISTOGRAM)) {
       if (getResultDataInfo(pSrcSchema->type, pSrcSchema->bytes, functionId, (int32_t)pExpr->base.param[0].i64, &type, &bytes,
                             &interBytes, 0, true, NULL) != TSDB_CODE_SUCCESS) {
         return TSDB_CODE_TSC_INVALID_OPERATION;
@@ -6147,7 +6200,7 @@ int32_t validateFillNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSqlNo
 
   const char* msg1 = "value is expected";
   const char* msg2 = "invalid fill option";
-  const char* msg3 = "top/bottom/sample not support fill";
+  const char* msg3 = "top/bottom/sample/histogram not support fill";
   const char* msg4 = "illegal value or data overflow";
   const char* msg5 = "fill only available for interval query";
   const char* msg7 = "join query not supported fill operation";
@@ -6257,7 +6310,7 @@ int32_t validateFillNode(SSqlCmd* pCmd, SQueryInfo* pQueryInfo, SSqlNode* pSqlNo
   for(int32_t i = 0; i < numOfExprs; ++i) {
     SExprInfo* pExpr = tscExprGet(pQueryInfo, i);
     if (pExpr->base.functionId == TSDB_FUNC_TOP || pExpr->base.functionId == TSDB_FUNC_BOTTOM
-        || pExpr->base.functionId == TSDB_FUNC_SAMPLE) {
+        || pExpr->base.functionId == TSDB_FUNC_SAMPLE || pExpr->base.functionId == TSDB_FUNC_HISTOGRAM) {
       return invalidOperationMsg(tscGetErrorMsgPayload(pCmd), msg3);
     }
   }

src/client/src/tscUtil.c

@@ -688,7 +688,8 @@ bool isSimpleAggregateRv(SQueryInfo* pQueryInfo) {
     if ((!IS_MULTIOUTPUT(aAggs[functionId].status)) ||
         (functionId == TSDB_FUNC_TOP || functionId == TSDB_FUNC_BOTTOM ||
          functionId == TSDB_FUNC_TS_COMP ||
-         functionId == TSDB_FUNC_SAMPLE)) {
+         functionId == TSDB_FUNC_SAMPLE ||
+         functionId == TSDB_FUNC_HISTOGRAM)) {
       return true;
     }
   }

src/query/inc/qAggMain.h

@@ -79,12 +79,7 @@ extern "C" {
 #define TSDB_FUNC_ELAPSED      37
 #define TSDB_FUNC_HISTOGRAM    38
 
-///////////////////////////////////////////
-// the following functions is not implemented.
-// after implementation, move them before TSDB_FUNC_BLKINFO. also make TSDB_FUNC_BLKINFO the maxium function index
-// #define TSDB_FUNC_HISTOGRAM    40
-// #define TSDB_FUNC_HLL          41
-// #define TSDB_FUNC_MODE         42
+#define TSDB_FUNC_MAX_NUM    39
 
 #define TSDB_FUNCSTATE_SO           0x1u    // single output
 #define TSDB_FUNCSTATE_MO           0x2u    // dynamic number of output, not multinumber of output e.g., TOP/BOTTOM

src/query/src/qAggMain.c

@@ -388,6 +388,11 @@ int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionI
       *bytes = sizeof(SElapsedInfo);
       *interBytes = *bytes;
       return TSDB_CODE_SUCCESS;
+    } else if (functionId == TSDB_FUNC_HISTOGRAM) {
+      *type = TSDB_DATA_TYPE_BINARY;
+      *bytes = (sizeof(SHistogramFuncInfo) + param * sizeof(SHistogramFuncBin));
+      *interBytes = *bytes;
+      return TSDB_CODE_SUCCESS;
     }
   }
 
@@ -492,6 +497,10 @@ int32_t getResultDataInfo(int32_t dataType, int32_t dataBytes, int32_t functionI
     *type = TSDB_DATA_TYPE_DOUBLE;
     *bytes = tDataTypes[*type].bytes;
     *interBytes = sizeof(SElapsedInfo);
+  } else if (functionId == TSDB_FUNC_HISTOGRAM) {
+    *type = TSDB_DATA_TYPE_BINARY;
+    *bytes = 1024;
+    *interBytes = *bytes;
   } else {
     return TSDB_CODE_TSC_INVALID_OPERATION;
   }
@@ -513,7 +522,7 @@ int32_t isValidFunction(const char* name, int32_t len) {
     }
   }
 
-  for(int32_t i = 0; i <= TSDB_FUNC_ELAPSED; ++i) {
+  for(int32_t i = 0; i < TSDB_FUNC_MAX_NUM; ++i) {
     int32_t nameLen = (int32_t) strlen(aAggs[i].name);
     if (len != nameLen) {
       continue;
@@ -4955,8 +4964,9 @@ static bool histogram_function_setup(SQLFunctionCtx *pCtx, SResultRowCellInfo* p
     return false;
   }
 
-  double* listBin = (double*) pCtx->param[0].pz;
-  int32_t numOfBins = pCtx->param[0].nLen / sizeof(double) - 1;
+  double* listBin = (double*) pCtx->param[1].pz;
+  int32_t numOfBins = (int32_t)pCtx->param[0].i64;
+  pRes->numOfBins = numOfBins;
   pRes->orderedBins = (SHistogramFuncBin*)((char*)pRes + sizeof(SHistogramFuncInfo));
   for (int32_t i = 0; i < numOfBins; ++i) {
     pRes->orderedBins[i].lower = listBin[i];
@@ -4989,6 +4999,7 @@ static void histogram_function(SQLFunctionCtx *pCtx) {
     for (int32_t b = 0; b < pRes->numOfBins; ++b) {
       if (v > pRes->orderedBins[b].lower && v <= pRes->orderedBins[b].upper) {
         pRes->orderedBins[b].count++;
+        break;
       }
     }
   }
@@ -5002,11 +5013,14 @@ static void histogram_function(SQLFunctionCtx *pCtx) {
 
 static void histogram_func_merge(SQLFunctionCtx *pCtx) {
   SHistogramFuncInfo* pInput = (SHistogramFuncInfo*) GET_INPUT_DATA_LIST(pCtx);
+  pInput->orderedBins = (SHistogramFuncBin*)((char*)pInput + sizeof(SHistogramFuncInfo));
+
   SHistogramFuncInfo* pRes = getHistogramFuncOutputInfo(pCtx);
   for (int32_t i = 0; i < pInput->numOfBins; ++i) {
     pRes->orderedBins[i].count += pInput->orderedBins[i].count;
   }
   SResultRowCellInfo *pResInfo = GET_RES_INFO(pCtx);
+  pResInfo->numOfRes = 1;
   pResInfo->hasResult = DATA_SET_FLAG;
 }
 
@@ -5018,6 +5032,16 @@ static void histogram_func_finalizer(SQLFunctionCtx *pCtx) {
     return;
   }
 
+  for (int32_t i = 0; i < pRes->numOfBins; ++i) {
+    int sz = sprintf(pCtx->pOutput + VARSTR_HEADER_SIZE, "(%g-%g]:%"PRId64,
+                     pRes->orderedBins[i].lower, pRes->orderedBins[i].upper, pRes->orderedBins[i].count);
+    varDataSetLen(pCtx->pOutput, sz);
+    pCtx->pOutput += pCtx->outputBytes;
+  }
+
+  pResInfo->numOfRes = pRes->numOfBins;
+  pResInfo->hasResult = DATA_SET_FLAG;
+
   doFinalizer(pCtx);
 }
 
@@ -5041,8 +5065,8 @@ int32_t functionCompatList[] = {
     1,          1,        1,         1,       -1,      1,          1,           1,          5,          1,      1,
     // tid_tag, deriv,    csum,       mavg,        sample,
     6,          8,        -1,         -1,          -1,
-    // block_info, elapsed
-    7,             1
+    // block_info,elapsed,histogram
+    7,          1,        -1
 };
 
 SAggFunctionInfo aAggs[40] = {{
@@ -5505,6 +5529,7 @@ SAggFunctionInfo aAggs[40] = {{
                               elapsedRequired,
                           },
                           {
+                              //38
                               "histogram",
                               TSDB_FUNC_HISTOGRAM,
                               TSDB_FUNC_HISTOGRAM,

src/query/src/qUtil.c

@@ -37,7 +37,8 @@ int32_t getRowNumForMultioutput(SQueryAttr* pQueryAttr, bool topBottomQuery, boo
     for (int16_t i = 0; i < pQueryAttr->numOfOutput; ++i) {
       if (pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_TOP ||
           pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_BOTTOM ||
-          pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_SAMPLE) {
+          pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_SAMPLE ||
+          pQueryAttr->pExpr1[i].base.functionId == TSDB_FUNC_HISTOGRAM) {
         return (int32_t)pQueryAttr->pExpr1[i].base.param[0].i64;
       }
     }