Re: Request: set opclass for generated unique and primary key indexes

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От Pavel Stehule
Тема Re: Request: set opclass for generated unique and primary key indexes
Дата
Msg-id BAY20-F2301E6373A90AE863D1E56F9FD0@phx.gbl
обсуждение исходный текст
Ответ на Re: Request: set opclass for generated unique and primary  (Stephan Szabo <sszabo@megazone.bigpanda.com>)
Ответы Re: Request: set opclass for generated unique and primary  (Stephan Szabo <sszabo@megazone.bigpanda.com>)
Список pgsql-hackers
> > >I seem to recall someone proposing extending the syntax of the UNIQUE
> > >constraints themselves, but there really isn't enough use-case to
> > >justify it AFAICS.  Especially not when you can always use CREATE 
>UNIQUE
> > >INDEX.
> >
> > I can always use second unique index. But it's redundant. This problem 
>is
> > related to using nonC locale.
>
>Why do you need both the unique index with varchar_pattern_ops and one
>with the default ops?

Because LIKE op don't use index on default ops with non C locale. I found it 
on tables of czech communities. Primary key is NUTS - 4..6 numbers.  I have 
to search values with some prefix -> op Like and on primary key can't to use 
std. index.

Pavel

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