Adding a materialized view for reply_view. Fixes #466

This commit is contained in:
Dessalines 2020-01-28 22:07:17 -05:00
parent 930cad41b4
commit 4778f198e1
6 changed files with 161 additions and 5 deletions

View file

@ -0,0 +1,25 @@
-- Drop the materialized / built views
drop view reply_view;
create view reply_view as
with closereply as (
select
c2.id,
c2.creator_id as sender_id,
c.creator_id as recipient_id
from comment c
inner join comment c2 on c.id = c2.parent_id
where c2.creator_id != c.creator_id
-- Do union where post is null
union
select
c.id,
c.creator_id as sender_id,
p.creator_id as recipient_id
from comment c, post p
where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
)
select cv.*,
closereply.recipient_id
from comment_view cv, closereply
where closereply.id = cv.id
;

View file

@ -0,0 +1,27 @@
-- https://github.com/dessalines/lemmy/issues/197
drop view reply_view;
-- Do the reply_view referencing the comment_mview
create view reply_view as
with closereply as (
select
c2.id,
c2.creator_id as sender_id,
c.creator_id as recipient_id
from comment c
inner join comment c2 on c.id = c2.parent_id
where c2.creator_id != c.creator_id
-- Do union where post is null
union
select
c.id,
c.creator_id as sender_id,
p.creator_id as recipient_id
from comment c, post p
where c.post_id = p.id and c.parent_id is null and c.creator_id != p.creator_id
)
select cv.*,
closereply.recipient_id
from comment_mview cv, closereply
where closereply.id = cv.id
;

View file

@ -0,0 +1 @@
drop view user_mention_mview;

View file

@ -0,0 +1,67 @@
create view user_mention_mview as
with all_comment as
(
select
ca.*
from comment_aggregates_mview ca
)
select
ac.id,
um.id as user_mention_id,
ac.creator_id,
ac.post_id,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
u.id as user_id,
coalesce(cl.score, 0) as my_vote,
(select cs.id::bool from comment_saved cs where u.id = cs.user_id and cs.comment_id = ac.id) as saved,
um.recipient_id
from user_ u
cross join all_comment ac
left join comment_like cl on u.id = cl.user_id and ac.id = cl.comment_id
left join user_mention um on um.comment_id = ac.id
union all
select
ac.id,
um.id as user_mention_id,
ac.creator_id,
ac.post_id,
ac.parent_id,
ac.content,
ac.removed,
um.read,
ac.published,
ac.updated,
ac.deleted,
ac.community_id,
ac.banned,
ac.banned_from_community,
ac.creator_name,
ac.creator_avatar,
ac.score,
ac.upvotes,
ac.downvotes,
null as user_id,
null as my_vote,
null as saved,
um.recipient_id
from all_comment ac
left join user_mention um on um.comment_id = ac.id
;

View file

@ -17,6 +17,15 @@ psql -qAt -U lemmy -f explain.sql > community_view.json
echo "explain (analyze, format json) select * from site_view limit 1" > explain.sql
psql -qAt -U lemmy -f explain.sql > site_view.json
echo "explain (analyze, format json) select * from reply_view where user_id = 34 and recipient_id = 34" > explain.sql
psql -qAt -U lemmy -f explain.sql > reply_view.json
echo "explain (analyze, format json) select * from user_mention_view where user_id = 34 and recipient_id = 34" > explain.sql
psql -qAt -U lemmy -f explain.sql > user_mention_view.json
echo "explain (analyze, format json) select * from user_mention_mview where user_id = 34 and recipient_id = 34" > explain.sql
psql -qAt -U lemmy -f explain.sql > user_mention_mview.json
grep "Execution Time" *.json
rm explain.sql

View file

@ -1,4 +1,3 @@
use super::user_mention_view::user_mention_view::BoxedQuery;
use super::*;
use diesel::pg::Pg;
@ -31,6 +30,34 @@ table! {
}
}
table! {
user_mention_mview (id) {
id -> Int4,
user_mention_id -> Int4,
creator_id -> Int4,
post_id -> Int4,
parent_id -> Nullable<Int4>,
content -> Text,
removed -> Bool,
read -> Bool,
published -> Timestamp,
updated -> Nullable<Timestamp>,
deleted -> Bool,
community_id -> Int4,
banned -> Bool,
banned_from_community -> Bool,
creator_name -> Varchar,
creator_avatar -> Nullable<Text>,
score -> BigInt,
upvotes -> BigInt,
downvotes -> BigInt,
user_id -> Nullable<Int4>,
my_vote -> Nullable<Int4>,
saved -> Nullable<Bool>,
recipient_id -> Int4,
}
}
#[derive(
Queryable, Identifiable, PartialEq, Debug, Serialize, Deserialize, QueryableByName, Clone,
)]
@ -63,7 +90,7 @@ pub struct UserMentionView {
pub struct UserMentionQueryBuilder<'a> {
conn: &'a PgConnection,
query: BoxedQuery<'a, Pg>,
query: super::user_mention_view::user_mention_mview::BoxedQuery<'a, Pg>,
for_user_id: i32,
sort: &'a SortType,
unread_only: bool,
@ -73,9 +100,9 @@ pub struct UserMentionQueryBuilder<'a> {
impl<'a> UserMentionQueryBuilder<'a> {
pub fn create(conn: &'a PgConnection, for_user_id: i32) -> Self {
use super::user_mention_view::user_mention_view::dsl::*;
use super::user_mention_view::user_mention_mview::dsl::*;
let query = user_mention_view.into_boxed();
let query = user_mention_mview.into_boxed();
UserMentionQueryBuilder {
conn,
@ -109,7 +136,7 @@ impl<'a> UserMentionQueryBuilder<'a> {
}
pub fn list(self) -> Result<Vec<UserMentionView>, Error> {
use super::user_mention_view::user_mention_view::dsl::*;
use super::user_mention_view::user_mention_mview::dsl::*;
let mut query = self.query;