Hi, I do have a reproductible crash with mysql_fdw when executing a plpgsql function. I'm running pg 11.1 with current mysql_fdw, but I had the same crash with the pg 9.6 and mysql_fdw provided with ubuntu packages.
>From psql side : server closed the connection unexpectedly This probably means the server terminated abnormally before or while processing the request. The connection to the server was lost. Attempting reset: Failed. !> In syslog : Nov 20 10:52:58 sact2Dev kernel: [322982.294765] postgres: segfault at 0 ip 00007fc8ab7b5350 sp 00007ffc4312a4f0 error 6 in mysql_fdw.so[7fc8ab7ac000+d000] I've located the crash cause on the line : *param_types[i] = exprType(param_expr); ( file mysql_fdw.c ; function prepare_query_params() ; in the forEach() loop) I've recompiled the fdw with a -g option. Could you please tell me (or point me a documentation) how to have a core dump from the segfaulted lib ; so that I can open it in a debugger to inspect variable contents ? Or any advice ? Thank you.