Re: HOT documentation README

Bruce Momjian wrote:
> Heikki Linnakangas wrote:
>> Tom Lane wrote:
>>> "Pavan Deolasee" <pavan(dot)deolasee(at)gmail(dot)com> writes:
>>>> Please see the version 14 of HOT patch attached.
>>> I expected to find either a large new README, or some pretty substantial
>>> additions to existing README files, to document how this all works.
>> Here's an updated version of the README I posted earlier. It now
>> reflects the changes to how pruning works.
>
> I have taken this, and Pavan's documentation about CREATE INDEX, and
> worked up an updated README. Comments? Corrections?

Thanks, that's much better.

I made some corrections, patch attached. I clarified the terminology a
bit: "row", "row version" and "tuple" were mixed in some places. "Tuple"
and "row version" are synonyms in my mind, so they can be used
interchangeably, but "row" is not. Row is a higher level concept and
refers to what a user sees when he does a "SELECT * FROM foo". There can
be multiple row versions, or tuples, behind a single row.

I also changed "ctid" to "line pointer" in most places. ctid is a field
on a tuple, I don't think we use that term to refer to line pointers
anywhere.

> I plan to put this in src/backend/access/heap/README.HOT.

Sounds good. I didn't look at the create index stuff.

--
Heikki Linnakangas
EnterpriseDB http://www.enterprisedb.com