/*
  修复集体项目成绩写入：EventResult 会为队内每名运动员各保留一条成绩，
  因此活动成绩唯一键应为“出场记录 + 报名人员”，不能只约束出场记录。
  本脚本可重复执行。
*/
SET NOCOUNT ON;
SET XACT_ABORT ON;
SET ANSI_NULLS ON;
SET ANSI_PADDING ON;
SET ANSI_WARNINGS ON;
SET ARITHABORT ON;
SET CONCAT_NULL_YIELDS_NULL ON;
SET QUOTED_IDENTIFIER ON;
SET NUMERIC_ROUNDABORT OFF;

BEGIN TRY
    BEGIN TRANSACTION;

    IF EXISTS (
        SELECT 1
        FROM sys.indexes
        WHERE object_id = OBJECT_ID(N'dbo.EventResult')
          AND name = N'UX_EventResult_SessionEntry_Active'
    )
        DROP INDEX [UX_EventResult_SessionEntry_Active] ON dbo.[EventResult];

    CREATE UNIQUE NONCLUSTERED INDEX [UX_EventResult_SessionEntry_Active]
        ON dbo.[EventResult]([SessionEntryId], [RegistrationPersonId])
        WHERE [SessionEntryId] IS NOT NULL AND [DeleteMark] = 0;

    COMMIT TRANSACTION;
END TRY
BEGIN CATCH
    IF @@TRANCOUNT > 0 ROLLBACK TRANSACTION;
    THROW;
END CATCH;