[Users] Openser and Oracle

[Klaus Darilion]

Papadopoulos Georgios wrote:
> Hello,
>  
> First of all congratulations to everyone involved in the new release. I
> haven't been able to get my hands on it yet, but just reading about it
> makes me very excited. Great job!
>  
> I would like to address the issue of Openser and Oracle working
> together. We are currently using Openser with a local MySQL. Our main
> database is Oracle and we are just copying data to MySQL so that Openser
> can work. This is a little difficult to maintain so I thought I would
> try to make Openser use directly our Oracle. Of course I ran into a
> number of issues. 
> 1. modules/acc and unixodbc. The acc_db_request() was not working
> because inserting a string in a date column does not work with Oracle.
> So, I had to change functions time2str() and time2odbc() in order to
> make this work. Also had to change acc.c to treat column time as DB_TIME
> instead of DB_STR (I think this could be treated as a bug).
> 2. modules/lcr. The query uses char_length() and rand() which I had to
> replace with lengthc() and dbms_random.value. Should these be modules
> params?

Hi!

I guess oracle allows the defintion of new function. Then you could 
write the functions char_length() and rand() which would be just 
wrappers to lengthc() and dbms_random.value.

> 3. modules/avpops. All issues were resolved by config changes and
> replacing avp_db_load() with avp_db_query(). 

Be careful - raw queries are vulnerable to SQL injection!!!

> 4. modules/auth_db, alias_db, uri_db, group. Since MySQL is case
> insensitive and Oracle is not, I made changes in the code to use
> raw_query() instead of query(). All queries have to be in the form
> "select ... from ... where username=upper(...)" 

Again: Be careful - raw queries are vulnerable to SQL injection!!!
>  
> I would be happy to provide patches and help in any way in order to make
> this migration easier in the future. However I am not sure whether my
> changes are general enough for everybody to use. So, do you have any
> suggestions about how to deal with these issues?

There is a oracle module in ser - you could port it to openser ;-)

regards
klaus

> Another issue that came up is the number of connections from Openser to
> the database. In our case, listening to five interfaces, with tcp
> disabled and children=5, we get 28 connections to DB which is a great
> waste of resources. From those five interfaces, one is receiving the
> bulk of traffic and the rest receive minimal traffic. Since each child
> has its own connection, then what is the purpose of connection pooling?
> How difficult would it be to have a common connection pool for all
> children?
>  
> sorry for the long email and thank you in advance for any answer.
>  
> George
>  
>  
>  
>  
> 
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-- 
Klaus Darilion
nic.at