Adding stickied to post_aggregates.

- Added more indexes to account for sorting by stickied first.
- Changed all order bys in the diesel views to use post_aggregates.
This commit is contained in:
Dessalines 2021-01-07 16:22:17 -05:00
parent b9b51c2dfc
commit 7a97fc370b
9 changed files with 57 additions and 22 deletions

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@ -11,6 +11,7 @@ pub struct PostAggregates {
pub score: i64,
pub upvotes: i64,
pub downvotes: i64,
pub stickied: bool,
pub published: chrono::NaiveDateTime,
pub newest_comment_time: chrono::NaiveDateTime,
}

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@ -282,6 +282,7 @@ table! {
score -> Int8,
upvotes -> Int8,
downvotes -> Int8,
stickied -> Bool,
published -> Timestamp,
newest_comment_time -> Timestamp,
}

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@ -302,14 +302,14 @@ impl<'a> PostQueryBuilder<'a> {
if let Some(community_id) = self.community_id {
query = query
.filter(post::community_id.eq(community_id))
.then_order_by(post::stickied.desc());
.then_order_by(post_aggregates::stickied.desc());
}
if let Some(community_name) = self.community_name {
query = query
.filter(community::name.eq(community_name))
.filter(community::local.eq(true))
.then_order_by(post::stickied.desc());
.then_order_by(post_aggregates::stickied.desc());
}
if let Some(url_search) = self.url_search {
@ -354,7 +354,7 @@ impl<'a> PostQueryBuilder<'a> {
SortType::Hot => query
.then_order_by(hot_rank(post_aggregates::score, post_aggregates::published).desc())
.then_order_by(post_aggregates::published.desc()),
SortType::New => query.then_order_by(post::published.desc()),
SortType::New => query.then_order_by(post_aggregates::published.desc()),
SortType::TopAll => query.then_order_by(post_aggregates::score.desc()),
SortType::TopYear => query
.filter(post::published.gt(now - 1.years()))
@ -605,6 +605,7 @@ mod tests {
score: 1,
upvotes: 1,
downvotes: 0,
stickied: false,
published: agg.published,
newest_comment_time: inserted_post.published,
},

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@ -3,7 +3,9 @@ drop table post_aggregates;
drop trigger post_aggregates_post on post;
drop trigger post_aggregates_comment_count on comment;
drop trigger post_aggregates_score on post_like;
drop trigger post_aggregates_stickied on post;
drop function
post_aggregates_post,
post_aggregates_comment_count,
post_aggregates_score;
post_aggregates_score,
post_aggregates_stickied;

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@ -6,18 +6,20 @@ create table post_aggregates (
score bigint not null default 0,
upvotes bigint not null default 0,
downvotes bigint not null default 0,
stickied boolean not null default false,
published timestamp not null default now(),
newest_comment_time timestamp not null default now(),
unique (post_id)
);
insert into post_aggregates (post_id, comments, score, upvotes, downvotes, published, newest_comment_time)
insert into post_aggregates (post_id, comments, score, upvotes, downvotes, stickied, published, newest_comment_time)
select
p.id,
coalesce(ct.comments, 0::bigint) as comments,
coalesce(pl.score, 0::bigint) as score,
coalesce(pl.upvotes, 0::bigint) as upvotes,
coalesce(pl.downvotes, 0::bigint) as downvotes,
p.stickied,
p.published,
greatest(ct.recent_comment_time, p.published) as newest_activity_time
from post p
@ -115,3 +117,21 @@ create trigger post_aggregates_score
after insert or delete on post_like
for each row
execute procedure post_aggregates_score();
-- post stickied
create function post_aggregates_stickied()
returns trigger language plpgsql
as $$
begin
update post_aggregates pa
set stickied = NEW.stickied
where pa.post_id = NEW.id;
return null;
end $$;
create trigger post_aggregates_stickied
after update on post
for each row
when (OLD.stickied is distinct from NEW.stickied)
execute procedure post_aggregates_stickied();

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@ -10,11 +10,14 @@ end; $$
LANGUAGE plpgsql;
drop index
idx_post_published,
idx_post_stickied,
idx_post_aggregates_hot,
idx_post_aggregates_stickied_hot,
idx_post_aggregates_active,
idx_post_aggregates_stickied_active,
idx_post_aggregates_score,
idx_post_aggregates_stickied_score,
idx_post_aggregates_published,
idx_post_aggregates_stickied_published,
idx_comment_published,
idx_comment_aggregates_hot,
idx_comment_aggregates_score,

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@ -12,15 +12,19 @@ end; $$
LANGUAGE plpgsql
IMMUTABLE;
-- Post
create index idx_post_published on post (published desc);
create index idx_post_stickied on post (stickied desc);
-- Post_aggregates
create index idx_post_aggregates_stickied_hot on post_aggregates (stickied desc, hot_rank(score, published) desc, published desc);
create index idx_post_aggregates_hot on post_aggregates (hot_rank(score, published) desc, published desc);
create index idx_post_aggregates_stickied_active on post_aggregates (stickied desc, hot_rank(score, newest_comment_time) desc, newest_comment_time desc);
create index idx_post_aggregates_active on post_aggregates (hot_rank(score, newest_comment_time) desc, newest_comment_time desc);
create index idx_post_aggregates_stickied_score on post_aggregates (stickied desc, score desc);
create index idx_post_aggregates_score on post_aggregates (score desc);
create index idx_post_aggregates_stickied_published on post_aggregates (stickied desc, published desc);
create index idx_post_aggregates_published on post_aggregates (published desc);
-- Comment
create index idx_comment_published on comment (published desc);

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@ -16,8 +16,20 @@ cat explain.sql | $PSQL_CMD > post.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by hot_rank(pa.score, pa.published) desc, pa.published desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_rank.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by p.stickied desc, hot_rank(pa.score, pa.published) desc, pa.published desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_stickied.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by pa.stickied desc, hot_rank(pa.score, pa.published) desc, pa.published desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_stickied_then_rank.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by pa.score desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_score.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by pa.stickied desc, pa.score desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_stickied_then_score.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by pa.published desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_published.json
echo "explain (analyze, format json) select * from post p, post_aggregates pa where p.id = pa.post_id order by pa.stickied desc, pa.published desc limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > post_ordered_by_stickied_then_published.json
echo "explain (analyze, format json) select * from comment limit 100" > explain.sql
cat explain.sql | $PSQL_CMD > comment.json

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@ -1,9 +0,0 @@
comment.json: "Execution Time": 12.263
community.json: "Execution Time": 1.225
community_ordered_by_subscribers.json: "Execution Time": 170.255
post.json: "Execution Time": 5.373
post_ordered_by_rank.json: "Execution Time": 1458.801
private_message.json: "Execution Time": 0.306
site.json: "Execution Time": 0.064
user_.json: "Execution Time": 2.606
user_mention.json: "Execution Time": 0.135