Cross apply a table valued function - sql

Question

A real mind bender here guys!
I have a table which basically positions users in a league:
LeagueID Stake League_EntryID UserID TotalPoints TotalBonusPoints Prize
13028 2.00 58659 2812 15 5 NULL
13028 2.00 58662 3043 8 3 NULL
13029 5.00 58665 2812 8 3 NULL
The League_EntryID is the unique field here but you will see this query returns multiple leagues that user is entered for that day.
I also have a table value function which returns the current prize standings for the league and this accepts the LeagueID as a parameter and returns the people who qualify for prize money. This is a complex function which ideally I would like to keep as the function accepting the LeagueID. The result of this is as below:
UserID Position League_EntryID WinPerc Prize
2812 1 58659 36.000000 14.00
3043 6 58662 2.933333 4.40
3075 6 58664 2.933333 4.40
Essentially what I want to do is to join the table value function to the topmost query by passing in the LeagueID to essentially update the Prize Field for that League_EntryID i.e.
SELECT * FROM [League]
INNER JOIN [League_Entry] ON [League].[LeagueID] = [League_Entry].[LeagueID]
INNER JOIN [dbo].[GetPrizesForLeague]([League].[LeagueID]) ....
I'm not sure if a CROSS APPLY would work here but essentially I believe I need to JOIN on both the LeagueID and the League_EntryID to give me my value for the Prize. Not sure on the best way to do this without visiting a scalar function which will in turn call the table value function and obtain the Prize from that.
Speed is worrying me here.
P.S. Not all League_EntryID's will exist as a part of the table value function output so maybe an OUTER JOIN/APPLY can be used?
EDIT See the query below
SELECT DISTINCT [LeagueID],
[CourseName],
[Refunded],
[EntryID],
[Stake],
d.[League_EntryID],
d.[UserID],
[TotalPoints],
[TotalBonusPoints],
[TotalPointsLastRace],
[TotalBonusPointsLastRace],
d.[Prize],
[LeagueSizeID],
[TotalPool],
d.[Position],
[PositionLastRace],
t.Prize
FROM
(
SELECT [LeagueID],
[EntryID],
[Stake],
[MeetingID],
[Refunded],
[UserID],
[League_EntryID],
[TotalPoints],
[TotalBonusPoints],
[TotalPointsLastRace],
[TotalBonusPointsLastRace],
[Prize],
[LeagueSizeID],
[dbo].[GetTotalPool]([LeagueID], 1) AS [TotalPool],
RANK() OVER( PARTITION BY [LeagueID] ORDER BY [TotalPoints] DESC, [TotalBonusPoints] DESC) AS [Position],
RANK() OVER( PARTITION BY [LeagueID] ORDER BY [TotalPointsLastRace] DESC, [TotalBonusPointsLastRace] DESC) AS [PositionLastRace],
ROW_NUMBER() OVER (PARTITION BY [LeagueID]
ORDER BY [TotalPoints] DESC, [TotalBonusPoints] DESC
) as [Position_Rownum]
FROM [DATA] ) AS d
INNER JOIN [Meeting] WITH (NOLOCK) ON [d].[MeetingID] = [Meeting].[MeetingID]
INNER JOIN [Course] ON [Meeting].[CourseID] = [Course].[CourseID]
OUTER APPLY (SELECT * FROM [dbo].[GetLeaguePrizes](d.[LeagueID])) t
WHERE (
([LeagueSizeID] = 3 AND [Position_Rownum] <= 50)
OR (d.[UserID] = #UserID AND [LeagueSizeID] = 3)
)
OR
(
[LeagueSizeID] in (1,2)
)
ORDER BY [LeagueID], [Position]
Any direction would be appreciated.

Answer 1

You need to use OUTER APPLY (a mix of CROSS APPLY and LEFT JOIN).
SELECT * FROM [League]
INNER JOIN [League_Entry] ON [League].[LeagueID] = [League_Entry].[LeagueID]
OUTER APPLY [dbo].[GetPrizesForLeague]([League].[LeagueID]) t
Performance is very good with CROSS APPLY/OUTER APPLY. It's great for replacing some inner queries and cursors.