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feat(query): add hll function

This commit is contained in:
Ganlin Zhao 2022-05-17 10:34:59 +08:00
parent 143c50dde3
commit 1eb59a2fed
4 changed files with 32 additions and 2 deletions
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1
include/libs/function/functionMgt.h
View File

@ -41,6 +41,7 @@ typedef enum EFunctionType {
FUNCTION_TYPE_SUM,
FUNCTION_TYPE_TWA,
FUNCTION_TYPE_HISTOGRAM,
FUNCTION_TYPE_HYPERLOGLOG,
// nonstandard SQL function
FUNCTION_TYPE_BOTTOM = 500,

4
source/libs/function/inc/builtinsimpl.h
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@ -90,6 +90,10 @@ bool histogramFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultIn
int32_t histogramFunction(SqlFunctionCtx* pCtx);
int32_t histogramFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
bool getHLLFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
int32_t hllFunction(SqlFunctionCtx* pCtx);
int32_t hllFinalize(SqlFunctionCtx* pCtx, SSDataBlock* pBlock);
bool getStateFuncEnv(struct SFunctionNode* pFunc, SFuncExecEnv* pEnv);
bool stateFunctionSetup(SqlFunctionCtx *pCtx, SResultRowEntryInfo* pResultInfo);
int32_t stateCountFunction(SqlFunctionCtx* pCtx);

25
source/libs/function/src/builtins.c
View File

@ -263,6 +263,21 @@ static int32_t translateHistogram(SFunctionNode* pFunc, char* pErrBuf, int32_t l
return TSDB_CODE_SUCCESS;
}
static int32_t translateHLL(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
if (1 != LIST_LENGTH(pFunc->pParameterList)) {
return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
}
SNode* pPara = nodesListGetNode(pFunc->pParameterList, 0);
if (QUERY_NODE_COLUMN != nodeType(pPara)) {
return buildFuncErrMsg(pErrBuf, len, TSDB_CODE_FUNC_FUNTION_ERROR,
"The input parameter of HYPERLOGLOG function can only be column");
}
pFunc->node.resType = (SDataType){.bytes = tDataTypes[TSDB_DATA_TYPE_UBIGINT].bytes, .type = TSDB_DATA_TYPE_UBIGINT};
return TSDB_CODE_SUCCESS;
}
static int32_t translateStateCount(SFunctionNode* pFunc, char* pErrBuf, int32_t len) {
if (3 != LIST_LENGTH(pFunc->pParameterList)) {
return invaildFuncParaNumErrMsg(pErrBuf, len, pFunc->functionName);
@ -829,6 +844,16 @@ const SBuiltinFuncDefinition funcMgtBuiltins[] = {
.processFunc = histogramFunction,
.finalizeFunc = histogramFinalize
},
{
.name = "hyperloglog",
.type = FUNCTION_TYPE_HYPERLOGLOG,
.classification = FUNC_MGT_AGG_FUNC,
.translateFunc = translateHLL,
.getEnvFunc = getHLLFuncEnv,
.initFunc = functionSetup,
.processFunc = hllFunction,
.finalizeFunc = hllFinalize
},
{
.name = "state_count",
.type = FUNCTION_TYPE_STATE_COUNT,

4
source/libs/function/src/builtinsimpl.c
View File

@ -26,7 +26,7 @@
#define MAVG_MAX_POINTS_NUM 1000
#define SAMPLE_MAX_POINTS_NUM 1000
#define TAIL_MAX_POINTS_NUM 100
#define TAIL_MAX_OFFSET 10
#define TAIL_MAX_OFFSET 100
#define HLL_BUCKET_BITS 14 // The bits of the bucket
#define HLL_DATA_BITS (64-HLL_BUCKET_BITS)
@ -2849,8 +2849,8 @@ int32_t hllFunction(SqlFunctionCtx *pCtx) {
char* data = colDataGetData(pCol, i);
if (IS_VAR_DATA_TYPE(type)) {
bytes = varDataLen(data);
data = varDataVal(data);
bytes -= VARSTR_HEADER_SIZE;
}
int32_t index = 0;