Query hints

Nikolay and Michael discuss query hints — what they are, what we do and don't have in PostgreSQL, and some other things in and around the ecosystem to be aware of. 
 
Here are some links to some extra things they mentioned:

• Query planning (docs) https://www.postgresql.org/docs/current/runtime-config-query.html 
• Statistics used by the planner (docs) https://www.postgresql.org/docs/current/planner-stats.html 
• default_statistics_target  https://www.postgresql.org/docs/current/runtime-config-query.html#GUC-DEFAULT-STATISTICS-TARGET 
• Optimiser hints discussion (wiki) https://wiki.postgresql.org/wiki/OptimizerHintsDiscussion  
• An example mailing list thread from 2006 https://www.postgresql.org/message-id/flat/20061012151439.GT28647%40nasby.net  
• Peter Geoghegan tweet regarding invalid index https://twitter.com/petervgeoghegan/status/1599191964045672449 
• plantuner http://sigaev.ru/git/gitweb.cgi?p=plantuner.git;a=blob;hb=HEAD;f=README.plantuner
• pg_hint_plan https://github.com/ossc-db/pg_hint_plan 
• Aurora PostgreSQL …

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