Passing multiple values for a single parameter from SSRS to hive - reporting-services

Question

Creating a concatenated string in SSRS with values enclosed in single quotes
Any answers to the above question?. I am struck with the same problem:
The query from SSRS side is:
select *
from xyz.test_table1
where f1 in (?)
Datasource for me in this case is a hive table. User selection on the parameter is a multivalued parameter which is what I expect to be substituted as:
where in ('value1','value2')
when query is executed. But when looked at the query execution on the hive side, it comes as:
where in ('value1,value2')
How could I solve this?

Answer 1

From the documentation here, it seems Hive Query Language supports Common Table Expressions.
Consequently, something similar to the following should work:
declare #str nvarchar(4000) = ?; -- String to split.
with n(n) as (select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1)
-- Select the same number of rows as characters in #str as incremental row numbers.
-- Cross joins increase exponentially to a max possible 10,000 rows to cover largest #str length.
,t(t) as (select top (select len(isnull(#str,'')) a) row_number() over (order by (select null)) from n n1,n n2,n n3,n n4)
-- Return the position of every value that follows the specified delimiter.
,s(s) as (select 1 union all select t+1 from t where substring(isnull(#str,''),t,1) = ',')
-- Return the start and length of every value, to use in the SUBSTRING function.
-- ISNULL/NULLIF combo handles the last value where there is no delimiter at the end of the string.
,l(s,l) as (select s,isnull(nullif(charindex(',',isnull(#str,''),s),0)-s,4000) from s)
-- Return each individual value in the delimited string along with it's position.
,v as (select row_number() over(order by s) as rn
,substring(#str,s,l) as item
from l
)
select *
from v
join xyz.test_table1 as t
on v.v = t.f1
If you rather understandably don't want this rigamarole in all of your datasets, you would need to encapsulate this logic into whatever the Hive equivalent of a SQL Server table-valued parameter is, perhaps a UDTF?
In SQL Server, the function would be defined as follows:
create function [dbo].[fn_StringSplit4k]
(
#str nvarchar(4000) = ' ' -- String to split.
,#delimiter as nvarchar(1) = ',' -- Delimiting value to split on.
,#num as int = null -- Which value to return.
)
returns table
as
return
-- Start tally table with 10 rows.
with n(n) as (select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1 union all select 1)
-- Select the same number of rows as characters in #str as incremental row numbers.
-- Cross joins increase exponentially to a max possible 10,000 rows to cover largest #str length.
,t(t) as (select top (select len(isnull(#str,'')) a) row_number() over (order by (select null)) from n n1,n n2,n n3,n n4)
-- Return the position of every value that follows the specified delimiter.
,s(s) as (select 1 union all select t+1 from t where substring(isnull(#str,''),t,1) = #delimiter)
-- Return the start and length of every value, to use in the SUBSTRING function.
-- ISNULL/NULLIF combo handles the last value where there is no delimiter at the end of the string.
,l(s,l) as (select s,isnull(nullif(charindex(#delimiter,isnull(#str,''),s),0)-s,4000) from s)
select rn
,item
from(select row_number() over(order by s) as rn
,substring(#str,s,l) as item
from l
) a
where rn = #num
or #num is null;

Answer 2

Figured it out! Posting the answer for other users.
Provide the query(under Query in SSRS) as an expression like below:
="select * from xyz.test_table1 where f1 in ('"&Join(Parameters!param.Value,"','")&"')"
The above string manipulation translates to:
select * from xyz.test_table1 where f1 in ('value1','value2')
Note: value1, value2 here are the values from user selected multivalue parameter