Re: Logging affected rows

On Thu, Jan 17, 2013 at 9:18 AM, classical_89 <luongnx512(at)gmail(dot)com> wrote:

> When i run a query , i just only want to the affected rows are logged to
> log
> file,What can i do ? .Is there a parameter in postgresql.conf to do that ?
> .Thanks in advance
>
>
AFAIK, I don't think we can log only affected rows of the query. But you
can log the EXPLAIN ANALYZE output of the query which includes affected
rows using AUTO_EXPLAIN contrib module.

*Eg:-*

postgres=# set auto_explain.log_analyze TO on;
SET
postgres=# load 'auto_explain';
LOAD
postgres=# select count(*) from cities ;
count
-------
2
(1 row)
*
*
*In logs:*

2012-12-06 03:27:57.104 IST [17410]: [78-1] db=postgres,user=postgres LOG:
statement: select count(*) from cities ;
2012-12-06 03:27:57.105 IST [17410]: [79-1] db=postgres,user=postgres LOG:
duration: 0.024 ms plan:
Query Text: select count(*) from cities ;
Aggregate (cost=1.02..1.03 rows=1 width=0) (actual
time=0.015..0.015 rows=1 loops=1)
Output: count(*)
-> Seq Scan on public.cities (cost=0.00..1.02 rows=2 width=0)
(actual time=0.009..0.010 *rows=2* loops=1)
Output: city, location

---
Regards,
Raghavendra
EnterpriseDB Corporation
Blog: http://raghavt.blogspot.com/