SSRS multi value parameter expansion invalidates query syntax

Question

These results from from running a demo solution and profiling the server.
--- here is the text of the query saved in the report's design ---
select *
from test_ssl
where [who] in(case when @P1 = 'all' then [who] else @P1 end)
    and [recid] in(case when @P2 = 'all' then [recid] else @P2 end)
Executing the report works when @P1 = ‘all’, @P2 = ‘all’
---------------------------------------- as executed at the server ---------------------------
(@P1 nvarchar(3),@P2 nvarchar(3))
select *
from test_ssl
where [who] in(case when @P1 = 'all' then [who] else @P1 end)
    and [recid] in(case when @P2 = 'all' then [recid] else @P2 end)
Executing the report fails when @P1 = (‘kid’,’adult’) & @P2 = ‘all’
    An error has occurred during report processing. (rsProcessingAborted)
    Query execution failed for dataset 'DataSet1'. (rsErrorExecutingCommand)
    For more information about this error navigate to the report server on the local server machine, or enable remote errors
---------------------------------------- as executed at the server ---------------------------
exec sp_executesql
N'select *
from test_ssl
where [who] in(case when N''kid'',N''adult'' = ''all'' then [who] else
N''kid'',N''adult'' end)
    and [recid] in(case when @P2 = ''all'' then [recid] else @P2 end)
', N'@P2 nvarchar(3)', @P2=N'all'
SSRS expanded @P1 into its values then substituted @P1 with 'kid','adult' in the query's text, then sent the text to SQL server using sp_executesql().
This substitution invalidates the SQL syntax.  The report fails.
For me to implement this simple example with only 2 parameters in separate queries in the report where @P1 &/ @P2 can each separately be {= 'all', or 1 value, or more than 1 value} will take 4 separate queries.
Query1: IF @P1 = all, @P2 = all BEGIN ... query text 1 ... END
Query2: IF @P1 != all, @P2 = all BEGIN ... query text 2 ... END
Query3: IF @P1 = all, @P2 != all BEGIN ... query text 3 ... END
and
Query4: IF @P1 != all, @P2 != all BEGIN ... query text 3 ... END
Each query will have to have a unique WHERE clause.
In my actual work problem some reports take 8 parameters that will be either 'all', 1 value, or multiple values.
This means that the report will have to have 64 queries each with its own unique WHERE clause and each query wrapped with its own IF @P..... = 'all' BEGIN ... query text ... END
Who knows what to do about this issue?
Hello!

Answer 1

Hi Stevesl,
I have tested on my local environment and the query is invalid.
As
Jan Pieter Posthuma mentioned that you can just add filter as below in the query, when you set the "Allow multiple values" in the parameter, you will got the "Select All" in the dropdown list, so there is no need to add "all"
again.
select * from test_ssl
where [who] in(@P1) and [recid] in(@P2)
You can also add filter in the dataset, details information below for your reference:
By default we can add many filters and the default logic between these filter is "And" and if you want to add some "Or" filters you can reference to the blog below:
FAQ: How do I implement OR logic or complicated logics for filters in a SSRS report?
Details information about filter in SSRS :
Add a Filter to a Dataset (Report Builder and SSRS)
Because you have a lot of parameters and you can consider add the cascading parameters:
Add Cascading Parameters to a Report (Report Builder and SSRS)
If you still have any problem, please feel free to ask.
Regards
Vicky Liu
Vicky Liu
TechNet Community Support