postgresql/contrib/postgres_fdw
Fujii Masao e3ebcca843 postgres_fdw: Fix connection leak.
In postgres_fdw, the cached connections to foreign servers will not be
closed until the local session exits if the user mappings or foreign servers
that those connections depend on are dropped. Those connections can be
leaked.

To fix that connection leak issue, after a change to a pg_foreign_server
or pg_user_mapping catalog entry, this commit makes postgres_fdw close
the connections depending on that entry immediately if current
transaction has not used those connections yet. Otherwise, mark those
connections as invalid and then close them at the end of current transaction,
since they cannot be closed in the midst of the transaction using them.
Closed connections will be remade at the next opportunity if necessary.

Back-patch to all supported branches.

Author: Bharath Rupireddy
Reviewed-by: Zhihong Yu, Zhijie Hou, Fujii Masao
Discussion: https://postgr.es/m/CALj2ACVNcGH_6qLY-4_tXz8JLvA+4yeBThRfxMz7Oxbk1aHcpQ@mail.gmail.com
2020-12-28 19:56:13 +09:00
..
expected postgres_fdw: Fix connection leak. 2020-12-28 19:56:13 +09:00
sql postgres_fdw: Fix connection leak. 2020-12-28 19:56:13 +09:00
.gitignore
connection.c postgres_fdw: Fix connection leak. 2020-12-28 19:56:13 +09:00
deparse.c Support subscripting of arbitrary types, not only arrays. 2020-12-09 12:40:37 -05:00
Makefile Split all OBJS style lines in makefiles into one-line-per-entry style. 2019-11-05 14:41:07 -08:00
option.c Initial pgindent and pgperltidy run for v13. 2020-05-14 13:06:50 -04:00
postgres_fdw--1.0.sql
postgres_fdw.c Move per-agg and per-trans duplicate finding to the planner. 2020-11-24 10:45:00 +02:00
postgres_fdw.control
postgres_fdw.h Update copyrights for 2020 2020-01-01 12:21:45 -05:00
shippable.c Improve hash_create()'s API for some added robustness. 2020-12-15 11:38:53 -05:00