On Wed, Sep 17, 2008 at 9:43 AM, Ivan Sergio Borgonovo
<mail(at)webthatworks(dot)it> wrote:
> The subjects says it all.
A couple of links that may be of use:
http://pooteeweet.org/files/phpworks06/explaining_explain.pdf
http://redivi.com/~bob/oscon2005_pgsql_pdf/OSCON_Explaining_Explain_Public.pdf
Good luck.