От: Matthew Wakeling
Тема: Re: plpgsql arrays
Дата: ,
Msg-id: alpine.DEB.2.00.0904071616350.791@aragorn.flymine.org
(см: обсуждение, исходный текст)
Ответ на: Re: plpgsql arrays  (Tom Lane)
Ответы: Re: plpgsql arrays  (justin)
Re: plpgsql arrays  (Merlin Moncure)
Список: pgsql-performance

Скрыть дерево обсуждения

plpgsql arrays  (Matthew Wakeling, )
 Re: plpgsql arrays  (Robert Haas, )
  Re: plpgsql arrays  (Matthew Wakeling, )
   Re: plpgsql arrays  (Tom Lane, )
    Re: plpgsql arrays  (Matthew Wakeling, )
     Re: plpgsql arrays  (Tom Lane, )
      Re: plpgsql arrays  (Matthew Wakeling, )
       Re: plpgsql arrays  (Matthew Wakeling, )
       Re: plpgsql arrays  (Tom Lane, )
        Re: plpgsql arrays  (Matthew Wakeling, )
        Re: plpgsql arrays  (Nathan Boley, )
    Re: plpgsql arrays  (Simon Riggs, )
     Re: plpgsql arrays  (Alvaro Herrera, )
     Re: plpgsql arrays  (Tom Lane, )
      Re: plpgsql arrays  (Matthew Wakeling, )
     Re: plpgsql arrays  (Matthew Wakeling, )
      Re: plpgsql arrays  (Robert Haas, )
 Re: plpgsql arrays  (Tom Lane, )
  Re: plpgsql arrays  (Matthew Wakeling, )
   Re: plpgsql arrays  (justin, )
    Re: plpgsql arrays  (Matthew Wakeling, )
     Re: plpgsql arrays  (justin, )
     Re: plpgsql arrays  (Tom Lane, )
      Re: plpgsql arrays  (Matthew Wakeling, )
   Re: plpgsql arrays  (Merlin Moncure, )
    Re: plpgsql arrays  (Tom Lane, )
     Re: plpgsql arrays  (Matthew Wakeling, )
      Re: plpgsql arrays  (Tom Lane, )
 Re: plpgsql arrays  (Merlin Moncure, )
  Re: plpgsql arrays  (Merlin Moncure, )
   Re: plpgsql arrays  (Matthew Wakeling, )
    Re: plpgsql arrays  (Merlin Moncure, )

On Fri, 3 Apr 2009, Tom Lane wrote:
>> ... alternatively is there a way to read two results streams
>> simultaneously?
>
> Use two cursors and FETCH from each as needed?  In recent releases you
> can even scroll backwards, which you're going to need to do to make
> a merge join work.

What would be the syntax for putting a single row from a cursor into a
variable? I have tried:

FETCH INTO left left_cursor;

which says syntax error, and

left = FETCH left_cursor;

which gives the error 'ERROR:  missing datatype declaration at or near "="'

Matthew

--
 I've run DOOM more in the last few days than I have the last few
 months.  I just love debugging ;-)  -- Linus Torvalds


В списке pgsql-performance по дате сообщения:

От: Tom Lane
Дата:
Сообщение: Re: plpgsql arrays
От: Bruce Momjian
Дата:
Сообщение: Re: 8.4 Performance improvements: was Re: Proposal of tunable fix for scalability of 8.4