[REVIEW 3-6] Improve run-time performance of pivot table

[Markus Mohrhard]

Hey Kohei,

2012/9/18 Kohei Yoshida <kohei.yoshida at gmail.com>:
> Actually, please review this one instead.  I forgot to do a small clean-up.
>

I did a sanity check of your patch and it looks ok. You've my sign-off for 3-6.

Regards,
Markus