github-mirror/discourse
2
0
Fork 0
mirror of https://github.com/discourse/discourse.git synced 2025-06-08 08:47:16 +08:00
Code Issues Actions 1 Packages Projects Releases Wiki Activity

PERF: reverse index on topic users to speed up join

Browse Source
This commit is contained in:
Sam
2014-09-10 23:03:59 +10:00
parent ca2100d012
commit af75360942
1 changed files with 6 additions and 0 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
db/migrate/20140910130155_create_topic_user_index.rb Normal file
View File

@ -0,0 +1,6 @@
class CreateTopicUserIndex < ActiveRecord::Migration
def change
# seems to be the most effective for joining into topics
add_index :topic_users, [:user_id, :topic_id], unique: true
end
end