RE: [HACKERS] Volunteer: Large Tuples / Tuple chaining

> -----Original Message-----
> From: owner-pgsql-hackers@postgreSQL.org 
> [mailto:owner-pgsql-hackers@postgreSQL.org]On Behalf Of Christof Petig
> 
> Hello,
> 
> I'll donate some (read all freely available) of my spare time to
> implementing tuple
> chaining. It looks like this feature is most wanted and it would be a
> pity to hold this until post 7.0. Personally I don't need it, yet ...
> But I will definitely find a use for it once available ;-) And it looks
> like a good start for hacking on pgsql.
> 
> I already dived into the depth of pgsql's page and tuple structures and
> it looks like it is possible. But before I start coding I would like to
> hear some more experienced opinions on how to implement it.
>

Will you put a long tuple into a long logical page(continued multiple
phisical(?) pages) ?
I'm suspicious about the way that allows non-page-formatted page.

Anyway it would need a big change around bufmgr/smgr etc.
Could someone estimate the influence/danger before going forward ?

Regards.

Hiroshi Inoue
Inoue@tpf.co.jp