Re: BUG #14897: Segfault on statitics SQL request

vincent(dot)lachenal(at)gmail(dot)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