Wrong question. Is there a way to compare numbers with prefixes without using the prefix module? Diego On Wed, Oct 14, 2009 at 1:36 AM, Diego Viola <diego.viola@gmail.com> 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?
Diego
On Tue, Oct 13, 2009 at 10:45 PM, Even André Fiskvik <grevenx@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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