Wrong question.<br><br>Is there a way to compare numbers with prefixes without using the prefix module?<br><br>Diego<br><br><div class="gmail_quote">On Wed, Oct 14, 2009 at 1:36 AM, Diego Viola <span dir="ltr"><<a href="mailto:diego.viola@gmail.com">diego.viola@gmail.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">I'm using MySQL now but I will try PostgreSQL with the prefix module, is there a way to do that without the prefix module and with regular SQL?<br>
<br>Any examples?<br><font color="#888888"><br>Diego</font><div><div></div><div class="h5"><br><br><div class="gmail_quote">On Tue, Oct 13, 2009 at 10:45 PM, Even André Fiskvik <span dir="ltr"><<a href="mailto:grevenx@me.com" target="_blank">grevenx@me.com</a>></span> wrote:<br>
<blockquote class="gmail_quote" style="border-left: 1px solid rgb(204, 204, 204); margin: 0pt 0pt 0pt 0.8ex; padding-left: 1ex;">What database are you using?<br>
You could do this with regular SQL, but it would by a costly operation,<br>
for PostgreSQL we're using the prefix module: <a href="http://pgfoundry.org/projects/prefix/" target="_blank">http://pgfoundry.org/projects/prefix/</a><br>
<br>
You can then match the closest prefix by using something like<br>
"WHERE myprefix_col @> caller_destination_number ORDER BY LENGTH<br>
(myprefix_col::text) LIMIT 1;"<br>
<br>
<br>
Best regards,<br>
Even André<br>
<div><div></div><div><br>
<br>
On 13. okt. 2009, at 23.53, Diego Viola wrote:<br>
<br>
> Hello,<br>
><br>
> I'm trying to write a post-paid billing script, I have the CDR on my<br>
> database and also a "rates" table, the CDR contains fields like<br>
> caller_destination_number, variable_duration, etc. and the rates<br>
> table contains: destination, prefix, rate (cost).<br>
><br>
> The problem is that I can't just strip the destination number to<br>
> take the prefix from it because I have to deal with destination<br>
> numbers from different countries and they all have different prefix<br>
> lengths... so I need to find another way to take the prefix from the<br>
> destination number.<br>
><br>
> Any ideas how to do this?<br>
><br>
> Thanks,<br>
><br>
> Diego<br>
><br>
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