ruby-arel 6.0.3-2 (s390x binary) in ubuntu xenial

 Arel is a SQL AST manager for Ruby. It simplifies the generation of
 complex SQL queries and adapts to various RDBMS systems.
 .
 It is intended to be a framework; that is, you can build your own ORM
 with it, focusing on innovative object and collection modeling as opposed to
 database compatibility and query generation.