Re: Is there any documentation on explain?

See the existing docs on EXPLAIN, and papers on the developers site:

    http://developer.postgresql.org/index.php

---------------------------------------------------------------------------

Diogo Biazus wrote:
> Hi everybody,
>
> I have some questions about the results in explain.
> I don't know exactly what's the diference between "merge join" and "hash
> join", wich one is faster?
> What is the meaning of the cost number?
> Is there any documentation about this?
>
> Thanks in advance,
>
> --
> Diogo de Oliveira Biazus
> diogo@ikono.com.br
> Ikono Sistemas e Automa??o
> http://www.ikono.com.br
>
>
>
> ---------------------------(end of broadcast)---------------------------
> TIP 2: you can get off all lists at once with the unregister command
>     (send "unregister YourEmailAddressHere" to majordomo@postgresql.org)
>

--
  Bruce Momjian                        |  http://candle.pha.pa.us
  pgman@candle.pha.pa.us               |  (610) 359-1001
  +  If your life is a hard drive,     |  13 Roberts Road
  +  Christ can be your backup.        |  Newtown Square, Pennsylvania 19073