以下にスカラー値関数がありますが、CASE WHEN 式を追加したいのですが、今のところ正しい構文を取得できていません。
USE [MYDatabaseName]
GO
SET ANSI_NULLS ON
GO
SET QUOTED_IDENTIFIER ON
GO
ALTER FUNCTION [dbo].[leaveBalanceByEmployeeID] (@EmployeeID INT)
RETURNS decimal(10,1)
AS
BEGIN
DECLARE @returnValue decimal(10,1)
SELECT @returnValue = MIN(dbo.LeaveMaster.LeaveDaysCarriedFoward + dbo.MonthsInService(dbo.LeaveMaster.DaysCarriedFowardCutoffDate, GETDATE())
* dbo.EmployeeTypes.MonthlyLeaveAssignment) - (SELECT ISNULL(SUM(ActualLeaveDaysTaken), 0) AS LV
FROM dbo.LeaveApplications
WHERE (EmployeeRecordID = dbo.EmployeeMaster.id AND HRMApproval = 'True' AND MarkAsDeleted = 'False')) - CASE WHEN 0 <
(SELECT ISNULL(SUM(DaysAuthorised),0) AS ECL
FROM dbo.CompassionateLeaveApplications AS CompassionateLeaveApplications_2
WHERE (MasterEmployeeID = dbo.EmployeeMaster.id AND YEAR(CompassionateLeaveApplications_2.AuthorisedFromDate) =YEAR(GETDate()))) - ISNULL(MAX(dbo.Districts.CompassionateDays),0) THEN
(SELECT ISNULL(SUM(DaysAuthorised),0) AS ECL
FROM dbo.CompassionateLeaveApplications AS CompassionateLeaveApplications_2
WHERE (MasterEmployeeID = dbo.EmployeeMaster.id) AND YEAR(CompassionateLeaveApplications_2.AuthorisedFromDate) =YEAR(GETDate())) - ISNULL(MAX(dbo.Districts.CompassionateDays),0) ELSE 0 END
FROM dbo.EmployeeMaster Full outer join dbo.LeaveMaster ON dbo.EmployeeMaster.id = dbo.LeaveMaster.EmpRecordID Full outer join
dbo.EmployeeTypes ON dbo.EmployeeMaster.EmployeeType = dbo.EmployeeTypes.ID Full outer join
Human_Resources.Departments ON dbo.EmployeeMaster.DepartmentId = Human_Resources.Departments.DepartmentID Full outer join
dbo.StaffHomeAddresses ON dbo.EmployeeMaster.id = dbo.StaffHomeAddresses.StaffID Full outer join
dbo.CompassionateLeaveApplications AS CompassionateLeaveApplications_1 ON
dbo.EmployeeMaster.id = CompassionateLeaveApplications_1.MasterEmployeeID Full outer join
dbo.Districts ON dbo.StaffHomeAddresses.District = dbo.Districts.DistrictID
WHERE dbo.EmployeeMaster.id = @EmployeeID
GROUP BY dbo.EmployeeMaster.id
return @returnValue
END
現在、テーブル dbo.EmployeeMaster には、IsActive という名前のビット列があります。私が達成したいのは、IsActive 列 = True の場合、@returnValue は上記のクエリが返すものを返す必要があります。それ以外の場合、IsActive = False の場合、0.0 を返したいだけです。