Some learning about JOIN filled queries like the SELECT that is used to list post_aggregates table when browsing postings on Lemmy.
https://dba.stackexchange.com/questions/155972/postgres-join-conditions-vs-where-conditions
“Logically, it makes no difference at all whether you place conditions in the join clause of an INNER JOIN or the WHERE clause of the same SELECT. The effect is the same. (Not the case for OUTER JOIN!)”
Learning about join_collapse_limit
I think 8 is a concern for Lemmy!
FROM (((((((((((((“post_aggregates”
INNER JOIN “person” ON (“post_aggregates”.“creator_id” = “person”.“id”))
INNER JOIN “community” ON (“post_aggregates”.“community_id” = “community”.“id”))
LEFT OUTER JOIN “community_person_ban” ON ((“post_aggregates”.“community_id” = “community_person_ban”.“community_id”) AND (“community_person_ban”.“person_id” = “post_aggregates”.“creator_id”))) INNER JOIN “post” ON (“post_aggregates”.“post_id” = “post”.“id”))
LEFT OUTER JOIN “community_follower” ON ((“post_aggregates”.“community_id” = “community_follower”.“community_id”) AND (“community_follower”.“person_id” = $1)))
LEFT OUTER JOIN “community_moderator” ON ((“post”.“community_id” = “community_moderator”.“community_id”) AND (“community_moderator”.“person_id” = $2)))
LEFT OUTER JOIN “post_saved” ON ((“post_aggregates”.“post_id” = “post_saved”.“post_id”) AND (“post_saved”.“person_id” = $3)))
LEFT OUTER JOIN “post_read” ON ((“post_aggregates”.“post_id” = “post_read”.“post_id”) AND (“post_read”.“person_id” = $4)))
LEFT OUTER JOIN “person_block” ON ((“post_aggregates”.“creator_id” = “person_block”.“target_id”) AND (“person_block”.“person_id” = $5)))
LEFT OUTER JOIN “post_like” ON ((“post_aggregates”.“post_id” = “post_like”.“post_id”) AND (“post_like”.“person_id” = $6)))
LEFT OUTER JOIN “person_post_aggregates” ON ((“post_aggregates”.“post_id” = “person_post_aggregates”.“post_id”) AND (“person_post_aggregates”.“person_id” = $7)))
LEFT OUTER JOIN “community_block” ON ((“post_aggregates”.“community_id” = “community_block”.“community_id”) AND (“community_block”.“person_id” = $8)))
LEFT OUTER JOIN “local_user_language” ON ((“post”.“language_id” = “local_user_language”.“language_id”) AND (“local_user_language”.“local_user_id” = $9)))
WHERE