nekokak/p5-Teng — pull request #120 by Songmu (2014-02-13 14:59:25+00:00)
Title: Fix/care multipk autoincr

I often use auto-increment column which is not single primary key
but a part of multi primary keys.

It is a popular schema definition in partitioned table on MySQL.
eg. `PRIMARY KEY(id, created_at)`

This patch cares the multi primary keys which contains auto-increment
column.