def self.up
add_index :current_ways, :timestamp, :name => :current_ways_timestamp_idx
add_index :current_relations, :timestamp, :name => :current_relations_timestamp_idx
def self.up
add_index :current_ways, :timestamp, :name => :current_ways_timestamp_idx
add_index :current_relations, :timestamp, :name => :current_relations_timestamp_idx