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我正在创建函数以返回两个日期之间工作的分钟数。性能函数SQL Server
这会返回minuts的确切数量，但是当我在很多记录上使用它时，治疗时间很长。
我有3个功能：
CREATE FUNCTION FN_FERIES_SELON_ANNEE (@YEAR INT)
RETURNS @FERIES TABLE (JourId INT NOT NULL,
JourDate DATETIME NOT NULL,
JoURLabel VARCHAR(50) NULL)
AS
BEGIN
DECLARE @JoursFeries TABLE (
[JourId] [INT] IDENTITY(1,1) NOT NULL,
[JourDate] [DATETIME] NOT NULL,
[JoURLabel] [VARCHAR](50) NULL
)
DECLARE @an INT
DECLARE @G INT
DECLARE @I INT
DECLARE @J INT
DECLARE @C INT
DECLARE @H INT
DECLARE @L INT
DECLARE @JourPaque INT
DECLARE @MoisPaque INT
DECLARE @DimPaque DATETIME
DECLARE @LunPaque DATETIME
DECLARE @JeuAscension DATETIME
DECLARE @LunPentecote DATETIME
DECLARE @NouvelAn DATETIME
DECLARE @FeteTravail DATETIME
DECLARE @Armistice3945 DATETIME
DECLARE @Assomption DATETIME
DECLARE @Armistice1418 DATETIME
DECLARE @FeteNationale DATETIME
DECLARE @ToussaINT DATETIME
DECLARE @Noel DATETIME
SET @an = @YEAR
SET @G = @an % 19
SET @C = @an/100
SET @H = (@C - @C/4 - (8 * @C + 13)/25 + 19 * @G + 15) % 30
SET @I = @H - (@H/28) * (1 - (@H/28) * (29/(@H + 1)) * ((21 - @G)/11))
SET @J = (@an + @an/4 + @I + 2 - @C + @C/4) % 7
SET @L = @I - @J
SET @MoisPaque = 3 + (@L + 40)/44
SET @JourPaque = @L + 28 - 31 * (@MoisPaque/4)
-- Jours fériés mobiles
SET @DimPaque = cast(cast(@an AS VARCHAR(4)) + '-'
+ cast(@MoisPaque AS VARCHAR(2)) + '-'
+ cast(@JourPaque AS VARCHAR(2)) AS DATETIME)
SET @LunPaque = DATEADD(DAY, 1, @DimPaque)
SET @JeuAscension = DATEADD(DAY, 39, @DimPaque)
SET @LunPentecote = DATEADD(DAY, 50, @DimPaque)
-- Jours fériés fixes
SET @NouvelAn = cast(cast(@an AS VARCHAR(4))+'-01-01 00:00:00' AS DATETIME)
SET @FeteTravail = cast(cast(@an AS VARCHAR(4))+'-05-01 00:00:00' AS DATETIME)
SET @Armistice3945 = cast(cast(@an AS VARCHAR(4))+'-05-08 00:00:00' AS DATETIME)
SET @Assomption = cast(cast(@an AS VARCHAR(4))+'-08-15 00:00:00' AS DATETIME)
SET @Armistice1418 = cast(cast(@an AS VARCHAR(4))+'-11-11 00:00:00' AS DATETIME)
SET @FeteNationale = cast(cast(@an AS VARCHAR(4))+'-07-14 00:00:00' AS DATETIME)
SET @ToussaINT = cast(cast(@an AS VARCHAR(4))+'-11-01 00:00:00' AS DATETIME)
SET @Noel = cast(cast(@an AS VARCHAR(4))+'-12-25 00:00:00' AS DATETIME)
INSERT INTO @JoursFeries (JourDate, JoURLabel)
SELECT @LunPaque, 'Lundi de Pâques'
UNION
SELECT @JeuAscension, 'Jeudi de l''Ascension'
UNION
SELECT @LunPentecote, 'Lundi de Pentecôte'
UNION
SELECT @NouvelAn, 'Nouvel an'
UNION
SELECT @FeteTravail, 'Fête du travail'
UNION
SELECT @Armistice3945, 'Armistice 39-45'
UNION
SELECT @Assomption, 'Assomption'
UNION
SELECT @FeteNationale, 'Fête Nationale'
UNION
SELECT @ToussaINT, 'Toussaint'
UNION
SELECT @Armistice1418, 'Armistice 14-18'
UNION
SELECT @Noel, 'Noël'
INSERT INTO @FERIES
SELECT * FROM @JoursFeries
RETURN
END
GO
CREATE FUNCTION FN_JOUR_TRAVAILLE (@Date1 DATETIME)
RETURNS INT AS
BEGIN
DECLARE @FLAG INT
SET @FLAG = 1
DECLARE @YEAR INT
SET @YEAR = DATEPART(YEAR, @DATE1)
IF EXISTS(SELECT * FROM FN_FERIES_SELON_ANNEE(@YEAR) WHERE JourDate = @Date1) BEGIN
SET @FLAG = 0
END
ELSE
IF DatePart(weekday, @DATE1) = 7 OR DatePart(weekday, @DATE1) = 1 BEGIN
SET @FLAG = 0
END
RETURN @FLAG
END
GO
CREATE FUNCTION FN_DATEDIFF_SELON_HORAIRES_ENTREPRISE2 (@Date1 DATETIME, @Date2 DATETIME)
RETURNS INT AS
BEGIN
DECLARE @NB_Jours INT
DECLARE @Cpt INT
DECLARE @Jours_Travailles INT
DECLARE @Date1_at_8_am DATETIME
DECLARE @Date2_at_6_pm DATETIME
DECLARE @Excedent INT
SET @NB_Jours = DATEDIFF(day, @Date1, @Date2) + 1
SET @Cpt = 0
SET @Jours_Travailles = 0
SET @Excedent = 0
SET @Date1_at_8_am = @Date1
SET @Date1_at_8_am = DATEADD(hour, - (DATEPART(hour, @Date1) - 8), @Date1_at_8_am)
SET @Date1_at_8_am = DATEADD(minute, - DATEPART(minute, @Date1_at_8_am), @Date1_at_8_am)
SET @Date1_at_8_am = DATEADD(second, - DATEPART(second, @Date1_at_8_am), @Date1_at_8_am)
SET @Date2_at_6_pm = @Date2
SET @Date2_at_6_pm = DATEADD(hour, 18 - DATEPART(hour, @Date2), @Date2_at_6_pm)
SET @Date2_at_6_pm = DATEADD(minute, - DATEPART(minute, @Date2_at_6_pm), @Date2_at_6_pm)
SET @Date2_at_6_pm = DATEADD(second, - DATEPART(second, @Date2_at_6_pm), @Date2_at_6_pm)
IF dbo.FN_JOUR_TRAVAILLE(@Date1) = 1 AND @Date1 > @Date1_at_8_am BEGIN
SET @Excedent = @Excedent + DATEDIFF(minute, @Date1_at_8_am, @Date1)
END
IF dbo.FN_JOUR_TRAVAILLE(@Date2) = 1 AND @Date2 < @Date2_at_6_pm BEGIN
SET @Excedent = @Excedent + DATEDIFF(minute, @Date2, @Date2_at_6_pm)
END
WHILE @Cpt < @NB_Jours
BEGIN
IF dbo.FN_JOUR_TRAVAILLE(DATEADD(day, @Cpt, @Date1)) = 1
BEGIN
SET @Jours_Travailles = @Jours_Travailles + 1
END
SET @Cpt = @Cpt + 1
END
RETURN @Jours_Travailles*600 - @Excedent
END
GO
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的问题是在这条线的功能FN_JOUR_TRAVAILLE：
IF EXISTS(SELECT * FROM FN_FERIES_SELON_ANNEE(@YEAR) WHERE JourDate = @Date1) BEGIN
SET @FLAG = 0
END
对于每个周期I计算的每一天我生成公共假日的为表那一年。
最好的解决方案是检查我是否已经创建了这个表，是否在其中搜索，如果没有，我创建它并存储它。
但我不知道如何做到这一点。
我需要在上级范围中创建一个表，并将其作为参数传递给我的函数。
为什么不建立公共假期表作为永久表？ – 2013-04-26 10:58:15
这是我最终决定要做的，谢谢。 – 2013-05-02 14:51:16