Add a select distinct option

[susanblueapron]

Adding an option to perform a select distinct on the Common Table Expression, which is useful when this table is created using an outer join.

[coveralls]

Coverage remained the same at 100.0% when pulling a6132d2aba18f6398c6329562e8dcea149451e30 on blueapron:master into c7b60b7f5df91c15dc10a4666411f6dc9d9138b8 on take-five:master.

[take-five]

Hello, and thank you very much for your PR! Have you considered introducing new method distinct instead of introducing an option? I.e.:

Category.join_recursive do |query|
  query.connect_by(id: :parent_id)
       .start_with(id: node_1.id)
       .distinct
end

It won't affect most of your changes, but this way we can have more clear interface. What do you think about it?

[coveralls]

Coverage remained the same at 100.0% when pulling 1be3d924d38f116036c63229433aa2d19b6f60da on blueapron:master into c7b60b7f5df91c15dc10a4666411f6dc9d9138b8 on take-five:master.

[susanblueapron]

Updated distinct from an option to a method now

[take-five]

Thanks, great job!

[take-five]

Check out version 0.1.0 from rubygems

[susanblueapron]

yup, updated in our Gemfile