13 Dec
2011
13 Dec
'11
2:27 p.m.
Hello,
On 12/13/11 1:08 PM, Paul Pankhurst wrote:
should have sent this to list -- sorry
*From:* Paul Pankhurst <mailto:paul@crocodile-rcs.com>
*Sent:* Tuesday, December 13, 2011 12:03 PM
*To:* miconda(a)gmail.com <mailto:miconda@gmail.com>
*Subject:* Re: [sr-dev] db_fetch_next problem with Postgres?
Hi Daniel,
I have a bit more information...
the outline pseudo code for what I am doing looks like this (removing
non relevant stuff)
db_fetch_query( xcap_db )
do
{
query( another_2nd_db )
} while ( db_fetch_next( xcap_db) )
it is the query to the second database that breaks everything...if I
remove it the problem goes away and db_fetch_next works as expected.
The access to the 2nd database uses completely different db_func_t and
db1_cont_t structures to the xcap_db
if it is the same db_url value, then it results in same db1_con_t
pointers, since the postgres has connection pool inside and matches an
old connection for same db_url when initializing the second one.
Some ideas:
- extend db api with a new function init_new that will always return a
new connection -- requires coding in db modules
- make another database where you add a view to the table in initial
database and work with it for second connection -- should work without
touching kamailio code
Cheers,
Daniel
I'll try running it with extra debug shortly to
see if I can see
what's happening
Paul
*From:* Daniel-Constantin Mierla <mailto:miconda@gmail.com>
*Sent:* Tuesday, December 13, 2011 11:10 AM
*To:* Development mailing list of the sip-router project
<mailto:sr-dev@lists.sip-router.org>
*Cc:* Paul Pankhurst <mailto:paul@crocodile-rcs.com>
*Subject:* Re: [sr-dev] db_fetch_next problem with Postgres?
Hello,
On 12/13/11 11:40 AM, Paul Pankhurst wrote:
--
Daniel-Constantin Mierla -- http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda
I am having problems with the db_fetch_next
routine and Postgres.
I can't see any problem with my code that calls it, and as far as I
can tell the problem appears to be in the db_postgres_fetch_result
routine.
On the first invocation of db_postgres_fetch_result it allocates a
result structure and gives me the first 5 rows of the 198 that match
my query after calling db_postgres_convert_rows.
On the 2nd invocation it fails to retrieve the next 5 rows because
CON_RESULT(_con) is NULL !
Anyone got any suggestions?
can you doublecheck and see if you don't call
free_result() before
fetching the next rows? If you run with debug=3, if there is a
free_result, you should see the log message from:
LM_DBG("PQclear(%p) result set\n", CON_RESULT(_con))
Cheers,
Daniel
--
Daniel-Constantin Mierla --http://www.asipto.com
http://linkedin.com/in/miconda -- http://twitter.com/miconda
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