rsim/oracle-enhanced — pull request #299 by Eric-Guo (2013-03-31 15:45:51+00:00)
Title: Due to rails 4 master remove to_sql, so also remove here

[rails 4 master change commit](https://github.com/rails/rails/commit/1c9f7fa6e17d3b026ad6e0bc1f07a9dd47d8a360)