TSQL: query with optional join - sql

Question

I have a search ui with 3 all optional search criteria.
2 of them are simple criteria for a where statement, that I should be able to solve with this: Stored Procedure with optional "WHERE" parameters.
The last criterion is using full text search where I join the result from ContainsTable. Is there some trick I can use to put everything in one stored procedure? Or should I make two queries, one with the full text search and one without?
Edited: I should have put my query here as well, sorry here it is
select Table1.* from Table1
join
(
select [Key], SUM(Rank) as Rank from
(
SELECT [Key], Rank*3 as Rank FROM Table1ShortSearch(#Keywords) union all
SELECT [Key], Rank*2 as Rank FROM Table1LongSearch(#Keywords)
) as RankingTbl
group by [Key]
) as r
on Table1.Id = r.[Key]
where ( #Status_Id Is Null Or Status_Id = #Status_Id )
order by r.Rank Desc
Thanks.

Answer 1

you can put everything in one stored procedure and have an IF statement - http://msdn.microsoft.com/en-us/library/ms182717.aspx

Answer 2

Original Answer:
You can use an EXISTS function like so:
Select ..
From ..
Where ( #Status_Id Is Null Or Status_Id = #Status_Id )
And (#Date Is Null Or [Date] = #Date )
And (#Criteria Is Null Or Exists(
Select 1
From ContainsTable(TableName, Column1,...,ColumnN, #Criteria..) As SearchTable1
Where SearchTable1.PK = OuterTable.PK
) )
After question revision:
The revised query is of a completely different nature than the original query. In the original query, you simply wanted to return results from Table1 and additionally filter those results if #Keywords was not null. In this query, you are outputting to the SELECT clause the freetext ranking. What would display for the ranking if #Keywords was passed as null?
If freetext ranking is not needed and you simply want to return results if either of the searches on #Keywords finds something, then you would do something like:
Select ...
From Table1
Where ( #Status_Id Is Null Or Status_Id = #Status_Id )
And ...
And (
#Keywords Is Null
Or Exists (
Select 1
From Table1ShortSearch(#Keywords) As T1
Where T1.Key = Table1.Key
)
Or Exists (
Select 1
From Table1LongSearch(#Keywords) As T2
Where T2.Key = Table1.Key
)
)
If you want to display the freetext ranking then your original query or perhaps a CTE would be the solution however you will need to use a Left Join to your subquery if you want to account for #Keywords being null. That would make your query read:
Select ...
From Table1
Left Join (
Select [Key], Sum(Rank) as Rank
From (
Select [Key], Rank*3 As Rank
From Table1ShortSearch(#Keywords)
Union All
Select [Key], Rank*2 As Rank
From Table1LongSearch(#Keywords)
) As RankingTbl
Group By [Key]
) as R
On R.[Key] = Table1.Id
Where ( #Status_Id Is Null Or Status_Id = #Status_Id )
And ...
And ( #Keywords Is Null Or R.Key Is Not Null )
Order By R.Rank Desc