# File lib/active_record/connection_adapters/postgresql_adapter.rb, line 303 def add_column(table_name, column_name, type, options = {}) native_type = native_database_types[type] sql_commands = ["ALTER TABLE #{table_name} ADD #{column_name} #{type_to_sql(type, options[:limit])}"] if options[:default] sql_commands << "ALTER TABLE #{table_name} ALTER #{column_name} SET DEFAULT '#{options[:default]}'" end if options[:null] == false sql_commands << "ALTER TABLE #{table_name} ALTER #{column_name} SET NOT NULL" end sql_commands.each { |cmd| execute(cmd) } end