Spring data jpa failed to pass named parameters in native subquery for db2

Question

Unable to pass named parameters in @NamedNativeQuery in spring data jpa

my repo:

   @Query(value = "select stat.desc as desc," + 
    " stat.priority as priority," + 
    " (case when sum(activeUser) is null then 0 else sum(activeUser) end) as activeUser," + 
    " (case when sum(totalUser) is null then 0 else sum(totalUser) end) as totalUser" + 
    " from lookup.user stat left outer join" + 
    " (" + 
    " select user.role as role, " + 
    " sum (case when user.STATUS = 'ACTIVE' then 1 else 0 end) as activeUser," + 
    " count(*) as totalUser," + 
    " user.group as group" + 
    " from Ctrl.user user" + 
    " where user.group =:userGroup " + 
    " and user.branch_code =:branchCode " + 
    " group by user.role,user.group" + 
    " ) as tbl on stat.role = tbl.role and stat.group = tbl.group" + 
    " where stat.group =:userGroup " + 
    " group by stat.desc, stat.priority" + 
    "", nativeQuery = true)
    public List<com.cimb.dto.UserStatusSummary> getSummaryReport(@Param(value = "userGroup") String userGroup, @Param(value = "branchCode") String branchCode);

The underlying database is DB2

When I tried to access that method I am hitting following error.

   DB2 SQL Error: SQLCODE=-302, SQLSTATE=22001, SQLERRMC=null, DRIVER=4.25.13

if I hard code those named parameters with values then it's working.

I can not use jpql as real queries have some subqueries in it, so I cant use JPQL

Edit Update

After some digging, I have found out that, the parameters I am passing are in the subquery, since JPA don't have subquery concept it's not injecting into named parameters which resulting in a syntax error.

Now how to work with Subqueries in JPA

Please help.