Re: [HACKERS] Arbitrary tuple size

Поиск
Список
Период
Сортировка
От Bruce Momjian
Тема Re: [HACKERS] Arbitrary tuple size
Дата
Msg-id 199907091801.OAA06493@candle.pha.pa.us
обсуждение исходный текст
Ответ на Re: [HACKERS] Arbitrary tuple size  ("Zeugswetter Andreas" <andreas.zeugswetter@telecom.at>)
Список pgsql-hackers
Done.  Thanks.

> >
> >I knew there had to be a reason that some tests where BLCKSZ/2 and some
> >BLCKSZ.
> >
> >Added to TODO:
> >
> > * Allow index on tuple greater than 1/2 block size
> >
> >Seems we have to allow columns over 1/2 block size for now.  Most people
> >wouln't index on them.
> 
> 
> Since an index header page has to point to at least 2 other leaf or
> header pages, it stores at least 2 keys per page.
> 
> I would alter the todo to say:
> 
> * fix btree to give a useful elog when key > 1/2 (page - overhead) and not
> abort
> 
> to fix the:
> >
> >         FATAL 1:  btree: failed to add item to the page
> >
> 
> A key of more than 4k will want a more efficient index type than btree
> for such data anyway.
> 
> Andreas
> 
> 
> 


--  Bruce Momjian                        |  http://www.op.net/~candle maillist@candle.pha.pa.us            |  (610)
853-3000+  If your life is a hard drive,     |  830 Blythe Avenue +  Christ can be your backup.        |  Drexel Hill,
Pennsylvania19026
 


В списке pgsql-hackers по дате отправления:

Предыдущее
От: Bruce Momjian
Дата:
Сообщение: 6.5.1
Следующее
От: Oleg Bartunov
Дата:
Сообщение: Re: [HACKERS] 6.5.1