[Freeswitch-users] Some help with my post-paid billing project

[Diego Viola]

Nice, I just converted this to Ruby/Sequel.

DB[:rates].first{{prefix=>substring('number', 1, length(prefix))}}

Thanks for the help :).

On Wed, Oct 14, 2009 at 2:07 AM, TTNC - Adnan Barakat
<technical at ttnc.co.uk>wrote:

> Diego Viola wrote:
> > 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?
> >
> > Any examples?
> SELECT * FROM rates WHERE prefix = SUBSTRING('$NUMBER$', 1,
> LENGTH(prefix)) LIMIT 1
>
> Adnan
>
> > Diego
> >
> > On Tue, Oct 13, 2009 at 10:45 PM, Even André Fiskvik <grevenx at me.com
> > <mailto:grevenx at me.com>> wrote:
> >
> >     What database are you using?
> >     You could do this with regular SQL, but it would by a costly
> operation,
> >     for PostgreSQL we're using the prefix module:
> >     http://pgfoundry.org/projects/prefix/
> >
> >     You can then match the closest prefix by using something like
> >     "WHERE myprefix_col @> caller_destination_number ORDER BY LENGTH
> >     (myprefix_col::text) LIMIT 1;"
> >
> >
> >     Best regards,
> >     Even André
> >
> >
> >     On 13. okt. 2009, at 23.53, Diego Viola wrote:
> >
> >     > Hello,
> >     >
> >     > I'm trying to write a post-paid billing script, I have the CDR on
> my
> >     > database and also a "rates" table, the CDR contains fields like
> >     > caller_destination_number, variable_duration, etc. and the rates
> >     > table contains: destination, prefix, rate (cost).
> >     >
> >     > The problem is that I can't just strip the destination number to
> >     > take the prefix from it because I have to deal with destination
> >     > numbers from different countries and they all have different prefix
> >     > lengths... so I need to find another way to take the prefix from
> the
> >     > destination number.
> >     >
> >     > Any ideas how to do this?
> >     >
> >     > Thanks,
> >     >
> >     > Diego
> >     >
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