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enh(query): add derivative function.

This commit is contained in:
Haojun Liao 2022-06-13 19:22:28 +08:00
parent 0a414b4934
commit 49fd380a69
8 changed files with 133 additions and 284 deletions
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2
include/libs/function/functionMgt.h
View File

@ -134,6 +134,8 @@ typedef enum EFunctionType {
FUNCTION_TYPE_HYPERLOGLOG_MERGE,
FUNCTION_TYPE_ELAPSED_PARTIAL,
FUNCTION_TYPE_ELAPSED_MERGE,
FUNCTION_TYPE_SAMPLE_PARTIAL,
FUNCTION_TYPE_SAMPLE_MERGE,
// user defined funcion
FUNCTION_TYPE_UDF = 10000

4
source/libs/function/inc/builtinsimpl.h
View File

@ -91,6 +91,10 @@ bool getDiffFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool diffFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResInfo);
int32_t diffFunction(SqlFunctionCtx *pCtx);
bool getDerivativeFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool derivativeFuncSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResInfo);
int32_t derivativeFunction(SqlFunctionCtx *pCtx);
bool getFirstLastFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
int32_t firstFunction(SqlFunctionCtx *pCtx);
int32_t lastFunction(SqlFunctionCtx *pCtx);

6
source/libs/function/inc/texpr.h
View File

@ -60,12 +60,6 @@ typedef struct SExprTraverseSupp {
void *pExtInfo;
} SExprTraverseSupp;
tExprNode* exprTreeFromTableName(const char* tbnameCond);
bool exprTreeApplyFilter(tExprNode *pExpr, const void *pItem, SExprTraverseSupp *param);
void buildFilterSetFromBinary(void **q, const char *buf, int32_t len);
#ifdef __cplusplus
}
#endif

32
source/libs/function/inc/tunaryoperator.h
View File

@ -1,32 +0,0 @@
/*
* Copyright (c) 2019 TAOS Data, Inc. <jhtao@taosdata.com>
*
* This program is free software: you can use, redistribute, and/or modify
* it under the terms of the GNU Affero General Public License, version 3
* or later ("AGPL"), as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful, but WITHOUT
* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
* FITNESS FOR A PARTICULAR PURPOSE.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*/
#ifndef _TD_COMMON_UNARY_SCALAR_OPERATOR_H_
#define _TD_COMMON_UNARY_SCALAR_OPERATOR_H_
#ifdef __cplusplus
extern "C" {
#endif
//#include "tscalarfunction.h"
//typedef void (*_unary_scalar_fn_t)(SScalarParam *pLeft, SScalarParam* pOutput);
//_unary_scalar_fn_t getUnaryScalarOperatorFn(int32_t binOperator);
#ifdef __cplusplus
}
#endif
#endif /*_TD_COMMON_BIN_SCALAR_OPERATOR_H_*/

42
source/libs/function/src/builtins.c
View File

@ -884,6 +884,38 @@ static int32_t translateLastRow(SFunctionNode* pFunc, char* pErrBuf, int32_t len
return TSDB_CODE_SUCCESS;
}
static int32_t translateDerivative(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
if (3 != LIST_LENGTH(pFunc->pParameterList)) {
return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
}
uint8_t colType = ((SExprNode*)nodesListGetNode(pFunc->pParameterList, 0))->resType.type;
// param1
SNode* pParamNode1 = nodesListGetNode(pFunc->pParameterList, 1);
if (QUERY_NODE_VALUE != nodeType(pParamNode1)) {
return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
}
SValueNode* pValue = (SValueNode*)pParamNode1;
pValue->notReserved = true;
if (!IS_NUMERIC_TYPE(colType)) {
return invaildFuncParaTypeErrMsg(pErrBuf, len, pFunc->functionName);
}
SNode* pParamNode2 = nodesListGetNode(pFunc->pParameterList, 2);
SValueNode* pValue2 = (SValueNode*)pParamNode2;
pValue2->notReserved = true;
if (pValue2->datum.i != 0 && pValue2->datum.i != 1) {
return invaildFuncParaValueErrMsg(pErrBuf, len, pFunc->functionName);
}
pFunc->node.resType = (SDataType){.bytes = tDataTypes[TSDB_DATA_TYPE_DOUBLE].bytes, .type = TSDB_DATA_TYPE_DOUBLE};
return TSDB_CODE_SUCCESS;
}
static int32_t translateFirstLast(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
// first(col_list) will be rewritten as first(col)
if (1 != LIST_LENGTH(pFunc->pParameterList)) {
@ -1583,6 +1615,16 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
.invertFunc = NULL,
.combineFunc = elapsedCombine,
},
{
.name = "derivative",
.type = FUNCTION_TYPE_DERIVATIVE,
.classification = FUNC_MGT_INDEFINITE_ROWS_FUNC | FUNC_MGT_TIMELINE_FUNC,
.translateFunc = translateDerivative,
.getEnvFunc = getDerivativeFuncEnv,
.initFunc = derivativeFuncSetup,
.processFunc = derivativeFunction,
.finalizeFunc = functionFinalize
},
{
.name = "last_row",
.type = FUNCTION_TYPE_LAST_ROW,

78
source/libs/function/src/builtinsimpl.c
View File

@ -4879,3 +4879,81 @@ int32_t blockDistFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
return row;
}
typedef struct SDerivInfo {
double prevValue; // previous value
TSKEY prevTs; // previous timestamp
bool ignoreNegative;// ignore the negative value
int64_t tsWindow; // time window for derivative
bool valueSet; // the value has been set already
} SDerivInfo;
bool getDerivativeFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv) {
pEnv->calcMemSize = sizeof(SDerivInfo);
return true;
}
bool derivativeFuncSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResInfo) {
if (!functionSetup(pCtx, pResInfo)) {
return false; // not initialized since it has been initialized
}
SDerivInfo* pDerivInfo = GET_ROWCELL_INTERBUF(pResInfo);
pDerivInfo->ignoreNegative = pCtx->param[2].param.i;
pDerivInfo->prevTs = -1;
pDerivInfo->tsWindow = pCtx->param[1].param.i;
pDerivInfo->valueSet = false;
return true;
}
int32_t derivativeFunction(SqlFunctionCtx *pCtx) {
SResultRowEntryInfo *pResInfo = GET_RES_INFO(pCtx);
SDerivInfo* pDerivInfo = GET_ROWCELL_INTERBUF(pResInfo);
SInputColumnInfoData* pInput = &pCtx->input;
SColumnInfoData* pInputCol = pInput->pData[0];
int32_t numOfElems = 0;
SColumnInfoData* pOutput = (SColumnInfoData*)pCtx->pOutput;
SColumnInfoData* pTsOutput = pCtx->pTsOutput;
int32_t step = 1;
int32_t i = pInput->startRowIndex;
TSKEY* tsList = (int64_t*)pInput->pPTS->pData;
if (pCtx->order == TSDB_ORDER_ASC) {
double v = 0;
for (; i < pInput->numOfRows + pInput->startRowIndex && i >= 0; i += step) {
if (colDataIsNull_f(pInputCol->nullbitmap, i)) {
continue;
}
char* d = (char*)pInputCol->pData + pInputCol->info.bytes * i;
GET_TYPED_DATA(v, double, pInputCol->info.type, d);
int32_t pos = pCtx->offset + numOfElems;
if (!pDerivInfo->valueSet) { // initial value is not set yet
pDerivInfo->valueSet = true;
} else {
double r = ((v - pDerivInfo->prevValue) * pDerivInfo->tsWindow) / (tsList[i] - pDerivInfo->prevTs);
if (pDerivInfo->ignoreNegative && r < 0) {
} else {
colDataAppend(pOutput, pos, (const char*)&r, false);
if (pTsOutput != NULL) {
colDataAppendInt64(pTsOutput, pos, &tsList[i]);
}
numOfElems++;
}
}
pDerivInfo->prevValue = v;
pDerivInfo->prevTs = tsList[i];
}
} else {
}
return numOfElems;
}

14
source/libs/function/src/taggfunction.c
View File

@ -161,13 +161,13 @@ typedef struct SRateInfo {
bool isIRate; // true for IRate functions, false for Rate functions
} SRateInfo;
typedef struct SDerivInfo {
double prevValue; // previous value
TSKEY prevTs; // previous timestamp
bool ignoreNegative;// ignore the negative value
int64_t tsWindow; // time window for derivative
bool valueSet; // the value has been set already
} SDerivInfo;
//typedef struct SDerivInfo {
// double prevValue; // previous value
// TSKEY prevTs; // previous timestamp
// bool ignoreNegative;// ignore the negative value
// int64_t tsWindow; // time window for derivative
// bool valueSet; // the value has been set already
//} SDerivInfo;
typedef struct SResPair {
TSKEY key;

239
source/libs/function/src/texpr.c
View File

@ -48,34 +48,6 @@ static void doExprTreeDestroy(tExprNode **pExpr, void (*fp)(void *)) {
*pExpr = NULL;
}
bool exprTreeApplyFilter(tExprNode *pExpr, const void *pItem, SExprTraverseSupp *param) {
#if 0
//non-leaf nodes, recursively traverse the expression tree in the post-root order
if (pLeft->nodeType == TEXPR_BINARYEXPR_NODE && pRight->nodeType == TEXPR_BINARYEXPR_NODE) {
if (pExpr->_node.optr == LOGIC_COND_TYPE_OR) { // or
if (exprTreeApplyFilter(pLeft, pItem, param)) {
return true;
}
// left child does not satisfy the query condition, try right child
return exprTreeApplyFilter(pRight, pItem, param);
} else { // and
if (!exprTreeApplyFilter(pLeft, pItem, param)) {
return false;
}
return exprTreeApplyFilter(pRight, pItem, param);
}
}
// handle the leaf node
param->setupInfoFn(pExpr, param->pExtInfo);
return param->nodeFilterFn(pItem, pExpr->_node.info);
#endif
return 0;
}
// TODO: these three functions should be made global
static void* exception_calloc(size_t nmemb, size_t size) {
void* p = taosMemoryCalloc(nmemb, size);
@ -101,214 +73,3 @@ static UNUSED_FUNC char* exception_strdup(const char* str) {
return p;
}
void buildFilterSetFromBinary(void **q, const char *buf, int32_t len) {
SBufferReader br = tbufInitReader(buf, len, false);
uint32_t type = tbufReadUint32(&br);
SHashObj *pObj = taosHashInit(256, taosGetDefaultHashFunction(type), true, false);
// taosHashSetEqualFp(pObj, taosGetDefaultEqualFunction(type));
int dummy = -1;
int32_t sz = tbufReadInt32(&br);
for (int32_t i = 0; i < sz; i++) {
if (type == TSDB_DATA_TYPE_BOOL || IS_SIGNED_NUMERIC_TYPE(type)) {
int64_t val = tbufReadInt64(&br);
taosHashPut(pObj, (char *)&val, sizeof(val), &dummy, sizeof(dummy));
} else if (IS_UNSIGNED_NUMERIC_TYPE(type)) {
uint64_t val = tbufReadUint64(&br);
taosHashPut(pObj, (char *)&val, sizeof(val), &dummy, sizeof(dummy));
}
else if (type == TSDB_DATA_TYPE_TIMESTAMP) {
int64_t val = tbufReadInt64(&br);
taosHashPut(pObj, (char *)&val, sizeof(val), &dummy, sizeof(dummy));
} else if (type == TSDB_DATA_TYPE_DOUBLE || type == TSDB_DATA_TYPE_FLOAT) {
double val = tbufReadDouble(&br);
taosHashPut(pObj, (char *)&val, sizeof(val), &dummy, sizeof(dummy));
} else if (type == TSDB_DATA_TYPE_BINARY) {
size_t t = 0;
const char *val = tbufReadBinary(&br, &t);
taosHashPut(pObj, (char *)val, t, &dummy, sizeof(dummy));
} else if (type == TSDB_DATA_TYPE_NCHAR) {
size_t t = 0;
const char *val = tbufReadBinary(&br, &t);
taosHashPut(pObj, (char *)val, t, &dummy, sizeof(dummy));
}
}
*q = (void *)pObj;
}
void convertFilterSetFromBinary(void **q, const char *buf, int32_t len, uint32_t tType) {
SBufferReader br = tbufInitReader(buf, len, false);
uint32_t sType = tbufReadUint32(&br);
SHashObj *pObj = taosHashInit(256, taosGetDefaultHashFunction(tType), true, false);
// taosHashSetEqualFp(pObj, taosGetDefaultEqualFunction(tType));
int dummy = -1;
SVariant tmpVar = {0};
size_t t = 0;
int32_t sz = tbufReadInt32(&br);
void *pvar = NULL;
int64_t val = 0;
int32_t bufLen = 0;
if (IS_NUMERIC_TYPE(sType)) {
bufLen = 60; // The maximum length of string that a number is converted to.
} else {
bufLen = 128;
}
char *tmp = taosMemoryCalloc(1, bufLen * TSDB_NCHAR_SIZE);
for (int32_t i = 0; i < sz; i++) {
switch (sType) {
case TSDB_DATA_TYPE_BOOL:
case TSDB_DATA_TYPE_UTINYINT:
case TSDB_DATA_TYPE_TINYINT: {
*(uint8_t *)&val = (uint8_t)tbufReadInt64(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_USMALLINT:
case TSDB_DATA_TYPE_SMALLINT: {
*(uint16_t *)&val = (uint16_t)tbufReadInt64(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_UINT:
case TSDB_DATA_TYPE_INT: {
*(uint32_t *)&val = (uint32_t)tbufReadInt64(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_TIMESTAMP:
case TSDB_DATA_TYPE_UBIGINT:
case TSDB_DATA_TYPE_BIGINT: {
*(uint64_t *)&val = (uint64_t)tbufReadInt64(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_DOUBLE: {
*(double *)&val = tbufReadDouble(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_FLOAT: {
*(float *)&val = (float)tbufReadDouble(&br);
t = sizeof(val);
pvar = &val;
break;
}
case TSDB_DATA_TYPE_BINARY: {
pvar = (char *)tbufReadBinary(&br, &t);
break;
}
case TSDB_DATA_TYPE_NCHAR: {
pvar = (char *)tbufReadBinary(&br, &t);
break;
}
default:
taosHashCleanup(pObj);
*q = NULL;
return;
}
taosVariantCreateFromBinary(&tmpVar, (char *)pvar, t, sType);
if (bufLen < t) {
tmp = taosMemoryRealloc(tmp, t * TSDB_NCHAR_SIZE);
bufLen = (int32_t)t;
}
switch (tType) {
case TSDB_DATA_TYPE_BOOL:
case TSDB_DATA_TYPE_UTINYINT:
case TSDB_DATA_TYPE_TINYINT: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_USMALLINT:
case TSDB_DATA_TYPE_SMALLINT: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_UINT:
case TSDB_DATA_TYPE_INT: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_TIMESTAMP:
case TSDB_DATA_TYPE_UBIGINT:
case TSDB_DATA_TYPE_BIGINT: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_DOUBLE: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_FLOAT: {
if (taosVariantDump(&tmpVar, (char *)&val, tType, false)) {
goto err_ret;
}
pvar = &val;
t = sizeof(val);
break;
}
case TSDB_DATA_TYPE_BINARY: {
if (taosVariantDump(&tmpVar, tmp, tType, true)) {
goto err_ret;
}
t = varDataLen(tmp);
pvar = varDataVal(tmp);
break;
}
case TSDB_DATA_TYPE_NCHAR: {
if (taosVariantDump(&tmpVar, tmp, tType, true)) {
goto err_ret;
}
t = varDataLen(tmp);
pvar = varDataVal(tmp);
break;
}
default:
goto err_ret;
}
taosHashPut(pObj, (char *)pvar, t, &dummy, sizeof(dummy));
taosVariantDestroy(&tmpVar);
memset(&tmpVar, 0, sizeof(tmpVar));
}
*q = (void *)pObj;
pObj = NULL;
err_ret:
taosVariantDestroy(&tmpVar);
taosHashCleanup(pObj);
taosMemoryFreeClear(tmp);
}