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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
3 changed files with 8 additions and 17 deletions
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13
src/invidious/users.cr
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@@ -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