Lei Lei 88f167c615 Refactor db api:
1. Increasing flexibility of function parameters.
2. Passing session as a parameter.

Change-Id: Idc4171b98dd2c975571734c4567602572ba4dcbc
2015-01-15 21:53:13 -08:00
..
2015-01-15 21:53:13 -08:00
2014-07-24 23:58:33 -07:00