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add stddev function partial/merge

This commit is contained in:
Ganlin Zhao 2022-06-14 16:53:59 +08:00
parent cd94eabc73
commit 68d33b1656
1 changed files with 55 additions and 1 deletions
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56
source/libs/function/src/builtinsimpl.c
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@ -89,6 +89,7 @@ typedef struct SStddevRes {
double dsum;
int64_t isum;
};
int16_t type;
} SStddevRes;
typedef struct SLeastSQRInfo {
@ -1513,6 +1514,7 @@ int32_t stddevFunction(SqlFunctionCtx* pCtx) {
int32_t type = pInput->pData[0]->info.type;
SStddevRes* pStddevRes = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
pStddevRes->type = type;
// computing based on the true data block
SColumnInfoData* pCol = pInput->pData[0];
@ -1629,6 +1631,39 @@ _stddev_over:
return TSDB_CODE_SUCCESS;
}
static void stddevTransferInfo(SStddevRes* pInput, SStddevRes* pOutput) {
pOutput->type = pInput->type;
if (IS_INTEGER_TYPE(pOutput->type)) {
pOutput->quadraticISum += pInput->quadraticISum;
pOutput->isum += pInput->isum;
} else {
pOutput->quadraticDSum += pInput->quadraticDSum;
pOutput->dsum += pInput->dsum;
}
pOutput->count += pInput->count;
return;
}
int32_t stddevFunctionMerge(SqlFunctionCtx* pCtx) {
SInputColumnInfoData* pInput = &pCtx->input;
SColumnInfoData* pCol = pInput->pData[0];
ASSERT(pCol->info.type == TSDB_DATA_TYPE_BINARY);
SStddevRes* pInfo = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
int32_t start = pInput->startRowIndex;
char* data = colDataGetData(pCol, start);
SStddevRes* pInputInfo = (SStddevRes*)varDataVal(data);
stddevTransferInfo(pInputInfo, pInfo);
SET_VAL(GET_RES_INFO(pCtx), 1, 1);
return TSDB_CODE_SUCCESS;
}
#define LIST_STDDEV_SUB_N(sumT, T) \
do { \
T* plist = (T*)pCol->pData; \
@ -1694,9 +1729,10 @@ int32_t stddevInvertFunction(SqlFunctionCtx* pCtx) {
int32_t stddevFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
SInputColumnInfoData* pInput = &pCtx->input;
int32_t type = pInput->pData[0]->info.type;
SStddevRes* pStddevRes = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
int32_t type = pStddevRes->type;
double avg;
if (IS_INTEGER_TYPE(type)) {
avg = pStddevRes->isum / ((double)pStddevRes->count);
pStddevRes->result = sqrt(pStddevRes->quadraticISum / ((double)pStddevRes->count) - avg * avg);
@ -1708,6 +1744,24 @@ int32_t stddevFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
return functionFinalize(pCtx, pBlock);
}
int32_t stddevPartialFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
SStddevRes* pInfo = GET_ROWCELL_INTERBUF(GET_RES_INFO(pCtx));
int32_t resultBytes = getStddevInfoSize();
char* res = taosMemoryCalloc(resultBytes + VARSTR_HEADER_SIZE, sizeof(char));
memcpy(varDataVal(res), pInfo, resultBytes);
varDataSetLen(res, resultBytes);
int32_t slotId = pCtx->pExpr->base.resSchema.slotId;
SColumnInfoData* pCol = taosArrayGet(pBlock->pDataBlock, slotId);
colDataAppend(pCol, pBlock->info.rows, res, false);
taosMemoryFree(res);
return pResInfo->numOfRes;
}
int32_t stddevCombine(SqlFunctionCtx* pDestCtx, SqlFunctionCtx* pSourceCtx) {
SResultRowEntryInfo* pDResInfo = GET_RES_INFO(pDestCtx);
SStddevRes* pDBuf = GET_ROWCELL_INTERBUF(pDResInfo);