Index on concatenated object at universe level

Hi

i have an object called object with version(ex:- object1 ||'v'|| object2) which is created at universe level !!

if we add that object to query filters it's taking lot of time (~ 10 minutes )to retrieve 20 rows

suggest me how to handle this. i am thinking that, need to apply index awareness at universe level. Otherwise i need to create this object at DB table level and need to create the index on this object at DB level.

My guess is universe level index is good

Thanks,

Bhaskar