Re: text column indexing in UTF-8 database

Поиск
Список
Период
Сортировка
От Jeff Davis
Тема Re: text column indexing in UTF-8 database
Дата
Msg-id 1236967219.1024.8.camel@dell.linuxdev.us.dell.com
обсуждение исходный текст
Ответ на Re: text column indexing in UTF-8 database  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: text column indexing in UTF-8 database  (Tom Lane <tgl@sss.pgh.pa.us>)
Список pgsql-general
On Fri, 2009-03-13 at 13:13 -0400, Tom Lane wrote:
> There is actually some history here; the former distinction in the
> equality operators arose from exactly your concern.  But after we
> put in the second-pass check to insist on bitwise equality, we
> realized that the equality operators really were equivalent.
>

Interesting. It's certainly convenient when "=" means "values are
exactly the same" ;)

One thing that still doesn't make sense to me is that texteq() is
bitwise-equality even in 8.3.

It sounds like Reece Hart can avoid the extra index by making a new
opclass that's like text_pattern_ops except "~=~" should be named "=".

Regards,
    Jeff Davis


В списке pgsql-general по дате отправления:

Предыдущее
От: Marco Colombo
Дата:
Сообщение: Re: Maximum transaction rate
Следующее
От: Tom Lane
Дата:
Сообщение: Re: Maximum transaction rate