UDT 매개 변수가 두 개인 쿼리는 0.3 초가 걸리지 만 인라인 테이블 값 함수에 캡슐화되면 3.5 초가 걸립니다.느린 UDF에 대한 SQL 대안
나는 (Why is a UDF so much slower than a subquery?)을 읽었지만 수정/재 작성하는 방법에 어려움을 겪고 있습니다. 아래 @ JasonALong의 의견을 당
, 0.3 초에 완료 SELECT 문에 대한
실행 계획 : https://www.brentozar.com/pastetheplan/?id=HJnrqC53Z합니다 (SQL이 페이지에서 볼 수 있습니다). 귀하의 질문에 언급에 관해서는, https://www.brentozar.com/pastetheplan/?id=BJZbqR93b
SELECT
SelectedContracts.MeasurableID,
SelectedContracts.EntityID,
EntityName,
EntityAbbrev,
EntityLogoURL,
EntityHex1,
EntityHex2,
EntitySportID,
MeasurableName,
MeasurableOrganizationID,
YearFilter,
SeasonFilter,
CategoryFilter,
ResultFilter,
Logo4Result,
MeasurableSportID,
MouseoverFooter,
ContractRank4Org,
ContractEndUTC,
HighContractPrice4Period,
HighTradeID,
HighTradeUTC,
HighTradeNumberOfContracts,
HighTradeCurrency,
LowContractPrice4Period,
LowTradeID,
LowTradeUTC,
LowTradeNumberOfContracts,
LowTradeCurrency,
LastTradePrice,
LastTradeID,
LastTradeUTC,
LastTradeNumberOfContracts,
LastTradeCurrency,
SecondLastTradePrice,
SecondLastTradeID,
SecondLastTradeUTC,
SecondLastTradeNumberOfContracts,
SecondLastTradeCurrency,
ContractPrice4ChangeCalc,
ContractID4ChangeCalc,
ContractUTC4ChangeCalc,
ContractsNumberTraded4ChangeCalc,
ContractCurrency4ChangeCalc,
HighestBidID,
HighestBidMemberID,
HighestBidPrice,
HighestBidAvailableContracts,
HighestBidCurrency,
LowestAskID,
LowestAskMemberID,
LowestAskPrice,
LowestAskAvailableContracts,
LowestAskCurrency
FROM
(
SELECT
dbo.Contracts.MeasurableID,
dbo.Contracts.EntityID
FROM
dbo.Contracts
WHERE
dbo.Contracts.MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
GROUP BY
dbo.Contracts.MeasurableID,
dbo.Contracts.EntityID
) SelectedContracts
INNER JOIN
(
SELECT
dbo.Entities.ID,
--dbo.Entities.OrganizationID, -- Get OrganizationID from Measurable since some Entities (European soccer teams) have multiple Orgs
dbo.Entities.EntityName,
dbo.Entities.EntityAbbrev,
dbo.Entities.logoURL AS EntityLogoURL,
dbo.Entities.Hex1 AS EntityHex1,
dbo.Entities.Hex2 AS EntityHex2,
dbo.Entities.SportID AS EntitySportID
FROM
dbo.Entities
) SelectedEntities ON SelectedContracts.EntityID = SelectedEntities.ID
INNER JOIN
(
SELECT
dbo.Measurables.ID AS MeasurableID,
dbo.Measurables.Name AS MeasurableName,
dbo.Measurables.OrganizationID AS MeasurableOrganizationID,
dbo.Measurables.[Year] AS YearFilter,
dbo.Measurables.Season AS SeasonFilter,
dbo.Measurables.Category AS CategoryFilter,
dbo.Measurables.Result AS ResultFilter,
dbo.Measurables.Logo4Result,
dbo.Measurables.SportID AS MeasurableSportID,
dbo.Measurables.MouseoverFooter,
dbo.Measurables.ContractRank4Org,
dbo.Measurables.EndUTC AS ContractEndUTC
FROM
dbo.Measurables
) MEASURABLES_table ON SelectedContracts.MeasurableID = MEASURABLES_table.MeasurableID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ContractPrice AS HighContractPrice4Period,
ID AS HighTradeID,
UTCMatched AS HighTradeUTC,
NumberOfContracts AS HighTradeNumberOfContracts,
CurrencyCode AS HighTradeCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
ContractPrice DESC,
ID DESC
) RowNumber -- ID DESC means most recent trade of ties
FROM
Contracts
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND dbo.Contracts.UTCmatched < DATEADD(DAY, -30, SYSDATETIME())
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
) AS InnerSelect4HighTrade
WHERE
InnerSelect4HighTrade.RowNumber = 1
) HighTrades ON SelectedContracts.MeasurableID = HighTrades.MeasurableID AND SelectedContracts.EntityID = HighTrades.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ContractPrice AS LowContractPrice4Period,
ID AS LowTradeID,
UTCMatched AS LowTradeUTC,
NumberOfContracts AS LowTradeNumberOfContracts,
CurrencyCode AS LowTradeCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
ContractPrice ASC,
ID DESC
) RowNumber -- ID DESC means most recent trade of ties
FROM
Contracts
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND dbo.Contracts.UTCmatched < DATEADD(DAY, -30, SYSDATETIME())
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
) AS InnerSelect4LowTrade
WHERE InnerSelect4LowTrade.RowNumber = 1
) LowTrades ON SelectedContracts.MeasurableID = LowTrades.MeasurableID AND SelectedContracts.EntityID = LowTrades.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ContractPrice AS LastTradePrice,
ID AS LastTradeID,
UTCMatched AS LastTradeUTC,
NumberOfContracts AS LastTradeNumberOfContracts,
CurrencyCode AS LastTradeCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
ID DESC
) RowNumber -- ID DESC means most recent trade of ties
FROM
Contracts
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
) AS InnerSelect4LastTrade
WHERE InnerSelect4LastTrade.RowNumber = 1
) LastTrades ON SelectedContracts.MeasurableID = LastTrades.MeasurableID AND SelectedContracts.EntityID = LastTrades.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ContractPrice AS SecondLastTradePrice,
ID AS SecondLastTradeID,
UTCMatched AS SecondLastTradeUTC,
NumberOfContracts AS SecondLastTradeNumberOfContracts,
CurrencyCode AS SecondLastTradeCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
ID DESC
) RowNumber -- ID DESC means most recent trade of ties
FROM
Contracts
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
--need time filter???
) AS InnerSelect4SecondToLastTrade
WHERE InnerSelect4SecondToLastTrade.RowNumber = 2
) SecondToLastTrade ON SelectedContracts.MeasurableID = SecondToLastTrade.MeasurableID AND SelectedContracts.EntityID = SecondToLastTrade.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ContractPrice AS ContractPrice4ChangeCalc,
ID AS ContractID4ChangeCalc,
UTCMatched AS ContractUTC4ChangeCalc,
NumberOfContracts AS ContractsNumberTraded4ChangeCalc,
CurrencyCode AS ContractCurrency4ChangeCalc
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
ID DESC -- ID DESC equals the most recent trade if ties
) RowNumber
FROM
Contracts
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
AND dbo.Contracts.UTCmatched < DATEADD(Day ,-30, SYSDATETIME())
) AS InnerSelect4ChangeCalcPerPeriod
WHERE InnerSelect4ChangeCalcPerPeriod.RowNumber = 1
) Trade4ChangeCalcPerPeriod ON SelectedContracts.MeasurableID = Trade4ChangeCalcPerPeriod.MeasurableID AND SelectedContracts.EntityID = Trade4ChangeCalcPerPeriod.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ID AS HighestBidID,
MemberID AS HighestBidMemberID,
BidPrice AS HighestBidPrice,
AvailableContracts AS HighestBidAvailableContracts,
CurrencyCode AS HighestBidCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
BidPrice DESC,
ID DESC
) RowNumber
FROM
dbo.Interest2Buy
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND AvailableContracts > 0
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
) AS InnerSelect4HighestBid
WHERE InnerSelect4HighestBid.RowNumber = 1
) HighestBids ON SelectedContracts.MeasurableID = HighestBids.MeasurableID AND SelectedContracts.EntityID = HighestBids.EntityID
LEFT JOIN
(
SELECT
MeasurableID,
EntityID,
ID AS LowestAskID,
MemberID AS LowestAskMemberID,
AskPrice AS LowestAskPrice,
AvailableContracts AS LowestAskAvailableContracts,
CurrencyCode AS LowestAskCurrency
FROM
(
SELECT
*, ROW_NUMBER() OVER (
PARTITION BY MeasurableID,
EntityID
ORDER BY
AskPrice ASC,
ID DESC
) RowNumber
FROM
dbo.Interest2Sell
WHERE
MeasurableID IN ((2030),(2017),(2018),(2019),(2020),(2028),(2024),(2027),(2029),(2022),(4018),(4019),(4020),(4021))
AND AvailableContracts > 0
AND ( CurrencyCode IN (('GBP'), ('CAD'), ('INR'), ('BRL'), ('MXN'), ('CHF'), ('RUB'))
)
) AS InnerSelect4BestAsk
WHERE InnerSelect4BestAsk.RowNumber = 1
) BestAsks ON SelectedContracts.MeasurableID = BestAsks.MeasurableID AND SelectedContracts.EntityID = BestAsks.EntityID
이것은 너무 애매합니다. UDF는 스칼라 함수 또는 테이블 값일 수 있으며, 단일 명령문 또는 다중 명령문이 될 수 있습니다. 상관 하위 쿼리 또는 합류 하위 쿼리로 사용할 수 있습니다. 목록은 계속 켜져 있습니다. 이 상황을 읽은 후 특정 상황과 관련된 실제 사례를 제시해야합니다. https://stackoverflow.com/help/mcve * (코드의 두 버전에 대한 실행 계획을 통해 차이점을 확인하는 것은 좋지 않을 것입니다. 이는 차이점을 찾는 데 도움이 될 수 있습니다) * – MatBailie
fyi 따라 오는 모든 독자 들어, 옵션 (재 컴파일) https : // stackoverflow 추가 시도했다.com/questions/20864934/option-recompile-is-always-faster-why 그러나 이것은 차이를 만들지 않았습니다. 또한 시도했다 .Net (웹 서버)에서 SQL 쿼리를 작성하고 직접 실행하지만 이것은 심지어 함수 또는 저장된 프로 시저를 사용하는 것보다 느린 증명. –
UDT로 실행했지만 함수로 래핑되지 않으면 어떻게됩니까? 이는 성능 문제 (UDT 추가 또는 함수 랩핑)를 야기한 변경 사항을 분리하는 데 도움이됩니다. 그게 문제가되는 UDT라고 생각합니다. 그렇다면'IN()'을 사용하는 대신에 게임에 참여하도록 쿼리를 재 작성하거나 UDT에 인덱스와 통계를 적용 해보십시오. – MatBailie