Patch auto increment any key part

TokuDB allows an auto increment column to be any part of a key. The auto increment patch streamlines batched inserts when the auto increment field is not the first field in an index.

Blogs

• http://www.tokutek.com/2009/07/autoincrement_semantics/
• http://www.tokutek.com/2009/08/better_primary_keys_a_benefit_to_tokudbs_auto_increment_semantics/