Files
danbooru/db/migrate/20210127012303_add_rating_index_to_posts.rb
evazion 78892e6239 posts: add index on rating column.
Should improve performance for rating:e and rating:q searches. Rating:s
isn't isn't indexed because Postgres is unlikely to use the index for
rating:s searches (the selectivity is too low, ~77% of all posts are
rating:s).
2021-01-26 19:24:18 -06:00

6 lines
136 B
Ruby

class AddRatingIndexToPosts < ActiveRecord::Migration[6.1]
def change
add_index :posts, :rating, where: "rating != 's'"
end
end