R() objects and cloning
Based on the testcases I committed, I can't replicate this error: 624a0e19ab085f3cd0d7

<MikeSeth> [07:57:26] how do I do INTERVAL?
<MikeSeth> [07:57:56] e.g. I have an expression like NOW() - INTERVAL 1 HOUR
<MikeSeth> [08:15:55] nevermind, R()
<MikeSeth> [08:17:47] AttributeError: 'R' object has no attribute 'clone'
<MikeSeth> [08:17:49] hm.
<MikeSeth> [08:20:17] R isn't Expr?
<MikeSeth> [08:30:02] nevermind, RawQuery () :P
