# File lib/active_record/connection_adapters/abstract/schema_statements.rb, line 187 def remove_index(table_name, options = {}) if Hash === options # legacy support if options[:column] index_name = "#{table_name}_#{options[:column]}_index" elsif options[:name] index_name = options[:name] else raise ArgumentError, "You must specify the index name" end else index_name = "#{table_name}_#{options}_index" end execute "DROP INDEX #{index_name} ON #{table_name}" end