limit_value is presented for
If `limit_value` is presented, records fetching order is very important for performance. Should not unscope the order in the case.
kamipo added a commit to kamipo/rails that referenced this pull request
Jul 21, 2017
Since rails#26972, `ORDER BY` is kept if `LIMIT` is presented for performance. But in most SQL servers (e.g. PostgreSQL, SQL Server, etc), `ORDER BY` expressions must appear in select list for `SELECT DISTINCT`. We should not replace existing select list in that case.
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