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Attempt to optimize query for subscription feed

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This commit is contained in:
Omar Roth 2019-07-07 14:00:42 -05:00
parent 775612ec5a
commit c34a24b633
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GPG Key ID: B8254FB7EC3D37F2
3 changed files with 8 additions and 17 deletions
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5
src/invidious.cr
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@ -1282,10 +1282,7 @@ post "/login" do |env|
PG_DB.exec("INSERT INTO session_ids VALUES ($1, $2, $3)", sid, email, Time.utc)
view_name = "subscriptions_#{sha256(user.email)}"
PG_DB.exec("CREATE MATERIALIZED VIEW #{view_name} AS \
SELECT * FROM channel_videos WHERE
ucid IN (SELECT unnest(subscriptions) FROM users WHERE email = E'#{user.email.gsub("'", "\\'")}')
ORDER BY published DESC")
PG_DB.exec("CREATE MATERIALIZED VIEW #{view_name} AS #{MATERIALIZED_VIEW_SQL.call(user.email)}")
if Kemal.config.ssl || config.https_only
secure = true

7
src/invidious/helpers/jobs.cr
View File

@ -75,7 +75,7 @@ def refresh_feeds(db, logger, config)
end
end
if db.query_one("SELECT pg_get_viewdef('#{view_name}')", as: String).includes? "ucid = ANY"
if !db.query_one("SELECT pg_get_viewdef('#{view_name}')", as: String).includes? "WHERE ((cv.ucid = ANY (u.subscriptions))"
logger.puts("Materialized view #{view_name} is out-of-date, recreating...")
db.exec("DROP MATERIALIZED VIEW #{view_name}")
end
@ -95,10 +95,7 @@ def refresh_feeds(db, logger, config)
# While iterating through, we may have an email stored from a deleted account
if db.query_one?("SELECT true FROM users WHERE email = $1", email, as: Bool)
logger.puts("CREATE #{view_name}")
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS \
SELECT * FROM channel_videos WHERE
ucid IN (SELECT unnest(subscriptions) FROM users WHERE email = E'#{email.gsub("'", "\\'")}')
ORDER BY published DESC")
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS #{MATERIALIZED_VIEW_SQL.call(email)}")
db.exec("UPDATE users SET feed_needs_update = false WHERE email = $1", email)
end
rescue ex

13
src/invidious/users.cr
View File

@ -1,5 +1,8 @@
require "crypto/bcrypt/password"
# Materialized views may not be defined using bound parameters (`$1` as used elsewhere)
MATERIALIZED_VIEW_SQL = ->(email : String) { "SELECT cv.* FROM channel_videos cv WHERE EXISTS (SELECT subscriptions FROM users u WHERE cv.ucid = ANY (u.subscriptions) AND u.email = E'#{email.gsub("'", "\\'")}') ORDER BY published DESC" }
struct User
module PreferencesConverter
def self.from_rs(rs)
@ -166,10 +169,7 @@ def get_user(sid, headers, db, refresh = true)
begin
view_name = "subscriptions_#{sha256(user.email)}"
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS \
SELECT * FROM channel_videos WHERE
ucid IN (SELECT unnest(subscriptions) FROM users WHERE email = E'#{user.email.gsub("'", "\\'")}')
ORDER BY published DESC")
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS #{MATERIALIZED_VIEW_SQL.call(user.email)}")
rescue ex
end
end
@ -188,10 +188,7 @@ def get_user(sid, headers, db, refresh = true)
begin
view_name = "subscriptions_#{sha256(user.email)}"
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS \
SELECT * FROM channel_videos WHERE
ucid IN (SELECT unnest(subscriptions) FROM users WHERE email = E'#{user.email.gsub("'", "\\'")}')
ORDER BY published DESC")
db.exec("CREATE MATERIALIZED VIEW #{view_name} AS #{MATERIALIZED_VIEW_SQL.call(user.email)}")
rescue ex
end
end