Summary:
This logic relies on the logic on client side, specifically `SqliteDatabaseDriver.java` in specifying some keys to retrieve useful data in `currentStructure`. This will be error-prone if developer writes their own data driver which doesn't follow the same naming as the data driver used as model.
Also, this diff adds util file to deal with query for updating database on client side.
I decided to construct query clause on server side so that the client side change is not needed.
Reviewed By: jknoxville
Differential Revision: D21788241
fbshipit-source-id: cf9a920c3e5b7b29f619bc3f00e68616b3445cab
5a2221e6cd