gitlab-org--gitlab-foss/db/migrate/20180215181245_users_name_lower_index.rb

21 lines
643 B
Ruby

# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class UsersNameLowerIndex < ActiveRecord::Migration[4.2]
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
INDEX_NAME = 'index_on_users_name_lower'
disable_ddl_transaction!
def up
# On GitLab.com this produces an index with a size of roughly 60 MB.
execute "CREATE INDEX CONCURRENTLY #{INDEX_NAME} ON users (LOWER(name))"
end
def down
execute "DROP INDEX CONCURRENTLY IF EXISTS #{INDEX_NAME}"
end
end