Re: BUG #14897: Segfault on statitics SQL request

vincent.lachenal@gmail.com writes:
> But one of the resquest I use causes segmentation fault to server process.

> The request is :
> SELECT
> 	s.protocol,
> 	s.mapper,
> 	c.method,
> 	s.nb_threads,
> 	avg(c.client_end - c.client_start) / 1000000 AS total,
> 	avg(c.server_end - c.server_start) / 1000000 AS server,
> 	avg(c.server_start - c.client_start) / 1000000 AS client_to_server,
> 	avg(c.client_end - c.server_end) / 1000000 AS server_to_client
> FROM testsuite s
> INNER JOIN testcall c ON s.id = c.test_suite_id
> GROUP BY (s.protocol, s.mapper, c.method, s.nb_threads)
> ORDER BY s.nb_threads, c.method, s.mapper, s.protocol;

The query alone doesn't help us much.  Can you put together a
self-contained test case, including table declarations and some
sample data?  Also, are you using any non-default configuration
settings?

Alternatively, if you can get a stack trace from the crash,
that might be enough info to diagnose it (no promises though).

https://wiki.postgresql.org/wiki/Generating_a_stack_trace_of_a_PostgreSQL_backend

			regards, tom lane