There is a deprecation warning in Rails 7 raised by https://github.com/rsim/ruby-plsql/blob/master/lib/plsql/schema.rb#L103
ar_class.default_timezone
is equivalent to ActiveRecord::Base.default_timezone
which is deperecated in favor of ActiveRecord.default_timezone
DEPRECATION WARNING: ActiveRecord::Base.default_timezone is deprecated and will be removed in Rails 7.1.
Use ActiveRecord.default_timezone
instead.