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Merge pull request #14309 from taosdata/feat/mode_function 

feat(query): support mode function
This commit is contained in:
Ganlin Zhao 2022-06-28 13:22:50 +08:00 committed by GitHub
parent 00c27ee5e0 e9fbe1805b
commit 75da5ec070
No known key found for this signature in database
GPG Key ID: 4AEE18F83AFDEB23
4 changed files with 127 additions and 11 deletions
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4
include/util/taoserror.h
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@ -25,7 +25,7 @@ extern "C" {
// clang-format off
#define TAOS_DEF_ERROR_CODE(mod, code) ((int32_t)((0x80000000 | ((mod)<<16) | (code))))
#define TAOS_SYSTEM_ERROR(code) (0x80ff0000 | (code))
#define TAOS_SUCCEEDED(err) ((err) >= 0)
#define TAOS_FAILED(err) ((err) < 0)
@ -35,7 +35,7 @@ const char* terrstr();
int32_t* taosGetErrno();
#define terrno (*taosGetErrno())
#define TSDB_CODE_SUCCESS 0
#define TSDB_CODE_FAILED -1 // unknown or needn't tell detail error

5
source/libs/function/inc/builtinsimpl.h
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@ -191,6 +191,11 @@ bool getUniqueFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool uniqueFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo);
int32_t uniqueFunction(SqlFunctionCtx *pCtx);
bool getModeFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool modeFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo);
int32_t modeFunction(SqlFunctionCtx *pCtx);
int32_t modeFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
bool getTwaFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool twaFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo);
int32_t twaFunction(SqlFunctionCtx *pCtx);

24
source/libs/function/src/builtins.c
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@ -1045,20 +1045,28 @@ static int32_t translateFirstLastMerge(SFunctionNode* pFunc, char* pErrBuf, int3
return translateFirstLastImpl(pFunc, pErrBuf, len, false);
}
static int32_t translateUnique(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
static int32_t translateUniqueMode(SFunctionNode* pFunc, char* pErrBuf, int32_t len, bool isUnique) {
if (1 != LIST_LENGTH(pFunc->pParameterList)) {
return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
}
SNode* pPara = nodesListGetNode(pFunc->pParameterList, 0);
if (!nodesExprHasColumn(pPara)) {
return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR, "The parameters of UNIQUE must contain columns");
return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR, "The parameters of %s must contain columns", isUnique ? "UNIQUE" : "MODE");
}
pFunc->node.resType = ((SExprNode*)pPara)->resType;
return TSDB_CODE_SUCCESS;
}
static int32_t translateUnique(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
return translateUniqueMode(pFunc, pErrBuf, len, true);
}
static int32_t translateMode(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
return translateUniqueMode(pFunc, pErrBuf, len, false);
}
static int32_t translateDiff(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
int32_t numOfParams = LIST_LENGTH(pFunc->pParameterList);
if (numOfParams == 0 || numOfParams > 2) {
@ -2109,7 +2117,7 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
{
.name = "unique",
.type = FUNCTION_TYPE_UNIQUE,
.classification = FUNC_MGT_AGG_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_INDEFINITE_ROWS_FUNC | FUNC_MGT_TIMELINE_FUNC |
.classification = FUNC_MGT_AGG_FUNC | FUNC_MGT_SELECT_FUNC | FUNC_MGT_INDEFINITE_ROWS_FUNC | FUNC_MGT_TIMELINE_FUNC |
FUNC_MGT_FORBID_STREAM_FUNC | FUNC_MGT_FORBID_WINDOW_FUNC | FUNC_MGT_FORBID_GROUP_BY_FUNC,
.translateFunc = translateUnique,
.getEnvFunc = getUniqueFuncEnv,
@ -2117,6 +2125,16 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
.processFunc = uniqueFunction,
.finalizeFunc = NULL
},
{
.name = "mode",
.type = FUNCTION_TYPE_MODE,
.classification = FUNC_MGT_AGG_FUNC,
.translateFunc = translateMode,
.getEnvFunc = getModeFuncEnv,
.initFunc = modeFunctionSetup,
.processFunc = modeFunction,
.finalizeFunc = modeFinalize,
},
{
.name = "abs",
.type = FUNCTION_TYPE_ABS,

105
source/libs/function/src/builtinsimpl.c
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@ -32,6 +32,7 @@
#define TAIL_MAX_OFFSET 100
#define UNIQUE_MAX_RESULT_SIZE (1024 * 1024 * 10)
#define MODE_MAX_RESULT_SIZE UNIQUE_MAX_RESULT_SIZE
#define HLL_BUCKET_BITS 14 // The bits of the bucket
#define HLL_DATA_BITS (64 - HLL_BUCKET_BITS)
@ -246,6 +247,19 @@ typedef struct SUniqueInfo {
char pItems[];
} SUniqueInfo;
typedef struct SModeItem {
int64_t count;
char data[];
} SModeItem;
typedef struct SModeInfo {
int32_t numOfPoints;
uint8_t colType;
int16_t colBytes;
SHashObj* pHash;
char pItems[];
} SModeInfo;
typedef struct SDerivInfo {
double prevValue; // previous value
TSKEY prevTs; // previous timestamp
@ -4694,21 +4708,100 @@ int32_t uniqueFunction(SqlFunctionCtx* pCtx) {
return pInfo->numOfPoints;
}
int32_t uniqueFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
bool getModeFuncEnv(SFunctionNode* pFunc, SFuncExecEnv* pEnv) {
pEnv->calcMemSize = sizeof(SModeInfo) + MODE_MAX_RESULT_SIZE;
return true;
}
bool modeFunctionSetup(SqlFunctionCtx* pCtx, SResultRowEntryInfo* pResInfo) {
if (!functionSetup(pCtx, pResInfo)) {
return false;
}
SModeInfo* pInfo = GET_ROWCELL_INTERBUF(pResInfo);
pInfo->numOfPoints = 0;
pInfo->colType = pCtx->resDataInfo.type;
pInfo->colBytes = pCtx->resDataInfo.bytes;
if (pInfo->pHash != NULL) {
taosHashClear(pInfo->pHash);
} else {
pInfo->pHash = taosHashInit(64, taosGetDefaultHashFunction(TSDB_DATA_TYPE_BINARY), true, HASH_NO_LOCK);
}
return true;
}
static void doModeAdd(SModeInfo* pInfo, char* data, bool isNull) {
// ignore null elements
if (isNull) {
return;
}
int32_t hashKeyBytes = IS_VAR_DATA_TYPE(pInfo->colType) ? varDataTLen(data) : pInfo->colBytes;
SModeItem** pHashItem = taosHashGet(pInfo->pHash, data, hashKeyBytes);
if (pHashItem == NULL) {
int32_t size = sizeof(SModeItem) + pInfo->colBytes;
SModeItem* pItem = (SModeItem*)(pInfo->pItems + pInfo->numOfPoints * size);
memcpy(pItem->data, data, pInfo->colBytes);
pItem->count += 1;
taosHashPut(pInfo->pHash, data, hashKeyBytes, &pItem, sizeof(SModeItem*));
pInfo->numOfPoints++;
} else {
(*pHashItem)->count += 1;
}
}
int32_t modeFunction(SqlFunctionCtx* pCtx) {
SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
SUniqueInfo* pInfo = GET_ROWCELL_INTERBUF(pResInfo);
SModeInfo* pInfo = GET_ROWCELL_INTERBUF(pResInfo);
SInputColumnInfoData* pInput = &pCtx->input;
SColumnInfoData* pInputCol = pInput->pData[0];
SColumnInfoData* pOutput = (SColumnInfoData*)pCtx->pOutput;
int32_t startOffset = pCtx->offset;
for (int32_t i = pInput->startRowIndex; i < pInput->numOfRows + pInput->startRowIndex; ++i) {
char* data = colDataGetData(pInputCol, i);
doModeAdd(pInfo, data, colDataIsNull_s(pInputCol, i));
if (sizeof(SModeInfo) + pInfo->numOfPoints * (sizeof(SModeItem) + pInfo->colBytes) >= MODE_MAX_RESULT_SIZE) {
taosHashCleanup(pInfo->pHash);
return TSDB_CODE_OUT_OF_MEMORY;
}
}
SET_VAL(pResInfo, 1, 1);
return TSDB_CODE_SUCCESS;
}
int32_t modeFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock) {
SResultRowEntryInfo* pResInfo = GET_RES_INFO(pCtx);
SModeInfo* pInfo = GET_ROWCELL_INTERBUF(pResInfo);
int32_t slotId = pCtx->pExpr->base.resSchema.slotId;
SColumnInfoData* pCol = taosArrayGet(pBlock->pDataBlock, slotId);
int32_t currentRow = pBlock->info.rows;
for (int32_t i = 0; i < pResInfo->numOfRes; ++i) {
SUniqueItem* pItem = (SUniqueItem*)(pInfo->pItems + i * (sizeof(SUniqueItem) + pInfo->colBytes));
colDataAppend(pCol, i, pItem->data, false);
// TODO: handle ts output
int32_t resIndex;
int32_t maxCount = 0;
for (int32_t i = 0; i < pInfo->numOfPoints; ++i) {
SModeItem* pItem = (SModeItem*)(pInfo->pItems + i * (sizeof(SModeItem) + pInfo->colBytes));
if (pItem->count > maxCount) {
maxCount = pItem->count;
resIndex = i;
} else if (pItem->count == maxCount) {
resIndex = -1;
}
}
SModeItem* pResItem = (SModeItem*)(pInfo->pItems + resIndex * (sizeof(SModeItem) + pInfo->colBytes));
colDataAppend(pCol, currentRow, pResItem->data, (resIndex == -1) ? true : false);
return pResInfo->numOfRes;
}
bool getTwaFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv) {
pEnv->calcMemSize = sizeof(STwaInfo);
return true;