Changelog for 3.6.19:
Bug fixes
Fix incorrect query rewrite in replication mode. (Bo Peng)
Doc: add failover_command description when all standby nodes are down. (Takuma Hoshiai)
Doc: add note not to assign PostgreSQL servers to trusted_servers. (Tatsuo Ishii)
Fix assorted ancient v2 protocol bugs. (Tatsuo Ishii)
Fix problem that syslog_facility doesn't change by reload. (bug 548) (Takuma Hoshiai)
Fix Pgpool-II shutdown failed in certain case. (Tatsuo Ishii)
Allow the lost standby node to rejoin the master watchdog node when it gets rediscovered by the lifecheck. (bug 545) (Muhammad Usama)
Fix segfault when executing an erroneous query after DEALLOCATE a named statement. (bug 546) (Tatsuo Ishii)
Add "-I" option to arping_cmd command default setting. (Bo Peng)
Changelog taken from: https://www.pgpool.net/docs/latest/en/html/release-3-6-19.html
Changelog for 3.6.20:
Changes
Check if socket file exists at startup and remove them if PID file doesn't exist to avoid bind() failire. (Bo Peng)
Bug fixes
Fix incorrect query rewriting in native replication mode. (bug 551) (Bo Peng)
Doc: Update documentation and fix documentation typos. (Takuma Hoshiai, Tatsuo Ishii, Bo Peng)
Fix pgpool_setup to support PostgreSQL 12. (Tatsuo Ishii)
Fix occasional regression test failure. (Tatsuo Ishii)
Fix replication delay worker segfault when application_name in primary_conninfo is an empty string. (bug 565) (Tatsuo Ishii)
Fix the bug with ignored syslog setting. (Bo Peng)
Changelog taken from: https://www.pgpool.net/docs/latest/en/html/release-3-6-20.html
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