PostgreSQL: Documentation: 9.5: Planner/Optimizer
https://www.postgresql.org/docs/9.5/planner-optimizer.htmlPostgreSQL: Merge Join chooses very slow index scan
https://www.postgresql.org/message-id/1426746214298-5842523.post@n5.nabble.comPostgreSQL: Re: Merge Join chooses very slow index scan
https://www.postgresql.org/message-id/30571.1426775332@sss.pgh.pa.usWhy Postgres Won't Always Use an Index
https://thoughtbot.com/blog/why-postgres-wont-always-use-an-indexdatabase - Keep PostgreSQL from sometimes choosing a bad query plan - Stack Overflow
https://stackoverflow.com/questions/8228326/keep-postgresql-from-sometimes-choosing-a-bad-query-plan/8229000#8229000postgresql - Are regular VACUUM ANALYZE still recommended under 9.1? - Database Administrators Stack Exchange
https://dba.stackexchange.com/questions/18664/are-regular-vacuum-analyze-still-recommended-under-9-1sql - Efficient PostgreSQL query on timestamp using index or bitmap index scan? - Stack Overflow
https://stackoverflow.com/questions/24759003/efficient-postgresql-query-on-timestamp-using-index-or-bitmap-index-scansql - Postgres not using index when index scan is much better option - Stack Overflow
https://stackoverflow.com/questions/34537096/postgres-not-using-index-when-index-scan-is-much-better-option