On May 11, 9:03 pm, Elliott <[email protected]> wrote:
> Post.filter(:id => 10).union(Post.filter(:topic_id => 10).limit(5))
> returns the following SQL:
>
> SELECT * FROM `posts` WHERE (`id` = 10) UNION SELECT * FROM `posts`
> WHERE (`topic_id` = 10) LIMIT 5
>
> This would return five posts total.
>
> SELECT * FROM `posts` WHERE (`id` = 10) UNION (SELECT * FROM `posts`
> WHERE (`topic_id` = 10) LIMIT 5)
>
> This would return six posts, the first post with id of 10 and five
> additional posts.
>
> I'm unsure how to coerce Sequel into producing the latter, or if I
> even can.

I just pushed a fix for this issue (http://github.com/jeremyevans/
sequel/commit/359941f44fdc643ef462ae07fb3aa08d2e3b8d97).  It uses
subselects instead of parentheses, but should have the same results
and performance.

Jeremy
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