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Fixing slow joins to post_read, post_saved, and comment_saved . (#2738)

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- Fixes #2445
This commit is contained in:
Dessalines 2023-02-18 09:35:35 -05:00 committed by GitHub
parent 9b0428bc50
commit 47f4aa3550
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5 changed files with 10 additions and 6 deletions
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4
crates/db_views/src/comment_view.rs
View File

@ -311,7 +311,7 @@ impl<'a> CommentQuery<'a> {
}
if self.saved_only.unwrap_or(false) {
query = query.filter(comment_saved::id.is_not_null());
query = query.filter(comment_saved::comment_id.is_not_null());
}
if !self.show_deleted_and_removed.unwrap_or(true) {
@ -325,7 +325,7 @@ impl<'a> CommentQuery<'a> {
if self.local_user.is_some() {
// Filter out the rows with missing languages
query = query.filter(local_user_language::id.is_not_null());
query = query.filter(local_user_language::language_id.is_not_null());
// Don't show blocked communities or persons
query = query.filter(community_block::person_id.is_null());

6
crates/db_views/src/post_view.rs
View File

@ -365,17 +365,17 @@ impl<'a> PostQuery<'a> {
};
if self.saved_only.unwrap_or(false) {
query = query.filter(post_saved::id.is_not_null());
query = query.filter(post_saved::post_id.is_not_null());
}
// Only hide the read posts, if the saved_only is false. Otherwise ppl with the hide_read
// setting wont be able to see saved posts.
else if !self.local_user.map(|l| l.show_read_posts).unwrap_or(true) {
query = query.filter(post_read::id.is_null());
query = query.filter(post_read::post_id.is_null());
}
if self.local_user.is_some() {
// Filter out the rows with missing languages
query = query.filter(local_user_language::id.is_not_null());
query = query.filter(local_user_language::language_id.is_not_null());
// Don't show blocked communities or persons
query = query.filter(community_block::person_id.is_null());

3
docker/docker-compose.yml
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@ -99,7 +99,8 @@ services:
"postgres",
"-c", "session_preload_libraries=auto_explain",
"-c", "auto_explain.log_min_duration=5ms",
"-c", "auto_explain.log_analyze=true"
"-c", "auto_explain.log_analyze=true",
"-c", "track_activity_query_size=1048576"
]
networks:
- lemmyinternal

1
migrations/2023-02-15-212546_add_post_comment_saved_indexes/down.sql Normal file
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@ -0,0 +1 @@
drop index idx_post_saved_person_id, idx_comment_saved_person_id;

2
migrations/2023-02-15-212546_add_post_comment_saved_indexes/up.sql Normal file
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@ -0,0 +1,2 @@
create index idx_post_saved_person_id on post_saved (person_id);
create index idx_comment_saved_person_id on comment_saved (person_id);