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# See http://doc.gitlab.com/ce/development/migration_style_guide.html
# for more information on how to write migrations for GitLab.
class AddPathIndexToRedirectRoutes < ActiveRecord::Migration
include Gitlab::Database::MigrationHelpers
# Set this constant to true if this migration requires downtime.
DOWNTIME = false
disable_ddl_transaction!
INDEX_NAME = 'index_redirect_routes_on_path_unique_text_pattern_ops'
# Indexing on LOWER(path) varchar_pattern_ops speeds up the LIKE query in
# RedirectRoute.matching_path_and_descendants
#
def up
return unless Gitlab::Database.postgresql?
disable_statement_timeout
if_not_exists = Gitlab::Database.version.to_f >= 9.5 ? "IF NOT EXISTS" : ""
# Unique index on lower(path) across both types of redirect_routes:
execute("CREATE UNIQUE INDEX CONCURRENTLY #{if_not_exists} #{INDEX_NAME} ON redirect_routes (lower(path) varchar_pattern_ops);")
end
def down
return unless Gitlab::Database.postgresql?
disable_statement_timeout
execute("DROP INDEX IF EXISTS #{INDEX_NAME};")
end
end
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