[SR-Users] how to match exact string value in mtree (Uri Shacked)

Uri Shacked ushacked at gmail.com
Fri Feb 17 15:11:00 CET 2012


hi,

what do you think about the Dialplan module? it can probably do the trick
as well...

cheers,

On Fri, Feb 17, 2012 at 10:18 AM, Daniel-Constantin Mierla <
miconda at gmail.com> wrote:

> Hello,
>
>
> On 2/16/12 2:51 PM, Javier Gallart wrote:
>
> Hello Uri
>
> I had similar needs and I found the ndb_redis module more suited for that
> type of task. Instead of a tree you have a hash like this: tname tprefix
> tvalue. If you do a hget nts $avp(DID) and you get a not null value you
> have found your exact match. It works very  well for me and the time it
> takes for that "query" is barely noticeable. Of course redis does not
> address items like persistence, etc the same way a rdbms does.
>
>
> for hash tables in config, the alternative is using htable module. Then
> the selection is done on exact match, no prefix matching. mtree is suitable
> for storing keys that are composed from a limited set of characters (like
> numbers, 0-9 digits only), otherwise becomes too memory consuming. For keys
> that are composed from any character and need exact match, hash table
> structures are more suitable, no matter if it is via htable module or
> something else like redis.
>
> Cheers,
> Daniel
>
>   Hope it helps.
>
> Regards
>
> Javi
>
> On Thu, Feb 16, 2012 at 12:00 PM, <sr-users-request at lists.sip-router.org>wrote:
>
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>>   1. how to match exact string value in mtree (Uri Shacked)
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>> ----------------------------------------------------------------------
>>
>> Message: 1
>> Date: Thu, 16 Feb 2012 12:54:50 +0200
>> From: Uri Shacked <ushacked at gmail.com>
>> Subject: [SR-Users] how to match exact string value in mtree
>> To: "SIP Router - Kamailio (OpenSER) and SIP Express Router (SER) -
>>        Users   Mailing List" <sr-users at lists.sip-router.org>
>> Message-ID:
>>        <CAMMbDhTFNXAE-K88=
>> AeMjO7AnA_QJV3Ajj3AH-AxemXN3ze6HQ at mail.gmail.com>
>> Content-Type: text/plain; charset="iso-8859-1"
>>
>> Hi,
>>
>> I am using Mtree to match prefix numbers, some of them starts with 0 or
>> characters like D for example.
>> so, the mtree param is like this:
>>
>> modparam("mtree", "db_url", CFGDB)
>> modparam("mtree", "mtree",
>> "name=nts;dbtable=service_numbers_view;type=0;")
>> modpmodparam("mtree", "char_list", "0123456789*+#YMDabcdefgh")
>> modparam("mtree", "pv_value", "$avp(mtval)")
>> modparam("mtree", "pv_values", "$avp(mtvals)")
>>
>> The thing is, that i tried all:
>>
>> if(!mt_match("nts", "$avp(DID)","1"))
>> if(!mt_match("nts", "$avp(DID)","2"))
>> if(!mt_match("nts", "$avp(DID)","0"))
>>
>> and lets say i have the both prefix in the nts mtree:
>> 09555
>> 09555333
>>
>> And the prefix i search for is  $avp(DID)=09555444
>>
>> I allwasy get the 09555 because it is the longest match.
>> I need exact match.....
>>
>> how do i do that?
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>
>
>
> _______________________________________________
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> --
> Daniel-Constantin Mierla -- http://www.asipto.comhttp://linkedin.com/in/miconda -- http://twitter.com/miconda
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