Re: WIP: collect frequency statistics for arrays

Alexander Korotkov <aekorotkov@gmail.com>

From: Alexander Korotkov <aekorotkov@gmail.com>
To: Nathan Boley <npboley@gmail.com>, Robert Haas <robertmhaas@gmail.com>, Bruce Momjian <bruce@momjian.us>
Cc: pgsql-hackers <pgsql-hackers@postgresql.org>
Date: 2011-10-15T15:13:51Z
Lists: pgsql-hackers

Attachments

Hi!

Thanks for your attention to my patch!

On Sat, Oct 15, 2011 at 2:47 PM, Nathan Boley <npboley@gmail.com> wrote:

> > Looking now, I see that Alexander wasn't Cc'd on the review, so it's
> > possible he missed the message?
> >
>
> We've corresponded off list and have discussed my review at some length.
>
> Alex submitted an updated patch on Sep 22 to me personally ( although
> not to the list? Alex? ), with the promise of a new version with
> improved comments.
>

Oh, I didn't noticed that I've posted updated patch off-list. So, there is
repost of that version of patch. List of changes is below:
1) Distinct slot is used for length histogram.
2) Standard statistics is collected for arrays.
3) Most common values and most common elements are mapped to distinct
columns of pg_stats view, because both of them are calculated for arrays.

Now, it's hard for me to give to it as much time as I would like to. But I
hope to present improved comments and testing until end of october.

------
With best regards,
Alexander Korotkov.