Ewan Chou ade11fe9f4 *: support history read. (#1734) ...

* *: support history read.

This commit only handles the case when scheme does not change.
Use history schema will be supported in the following PR.

2016-09-19 15:37:30 +08:00

..

context.go

*: support history read. (#1734)

2016-09-19 15:37:30 +08:00