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feat(query): support mode function

This commit is contained in:
Ganlin Zhao 2022-06-27 15:08:13 +08:00
parent 486f268353
commit 515109088f
2 changed files with 26 additions and 3 deletions
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5
source/libs/function/inc/builtinsimpl.h
View File

@ -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
View File

@ -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 = getUniqueFuncEnv,
.initFunc = uniqueFunctionSetup,
.processFunc = uniqueFunction,
.finalizeFunc = functionFinalize,
},
{
.name = "abs",
.type = FUNCTION_TYPE_ABS,