No auto Increment when MySql Database converted to Postgres database - mysql

Question

In Mysql, ID is Auto Increment but when converted to Postgres there is no Auto Increment .
Mysql database
CREATE TABLE IF NOT EXISTS `cities` (
`id` bigint(20) NOT NULL AUTO_INCREMENT,
`state_id` bigint(20) NOT NULL,
`district_id` bigint(20) NOT NULL,
`name` varchar(255) NOT NULL,
`description` varchar(1000) DEFAULT NULL,
`created_by` int(11) NOT NULL,
`modified_by` int(11) DEFAULT NULL,
`is_active` char(1) NOT NULL DEFAULT 'Y',
`created` datetime DEFAULT NULL,
`modified` datetime DEFAULT NULL,
PRIMARY KEY (`id`),
KEY `state_id` (`state_id`)
) ENGINE=InnoDB DEFAULT CHARSET=latin1 AUTO_INCREMENT=26 ;
After Converted to postgres database
CREATE TABLE cities (
"id" bigint NOT NULL,
state_id bigint NOT NULL,
district_id bigint NOT NULL,
"name" varchar(255) NOT NULL,
description varchar(1000),
created_by int NOT NULL,
modified_by int,
is_active char(1) NOT NULL,
created timestamp,
modified timestamp,
PRIMARY KEY ("id")
);
INSERT INTO cities(state_id, district_id, city_type, name, description,
created_by, modified_by, is_active, created, modified)
VALUES
(1, 1, '', 'Ramtek', null, 1, null, 'Y',
'2015-04-16 10:44:11', '2015-04-16 10:44:11');

Answer 1

You could use bigserial in such cases. It provides an auto increment feature in postgres:
CREATE TABLE cities (
"id" bigserial PRIMARY KEY,
Not Null constraint is provided by default.
Docs : http://www.postgresql.org/docs/current/static/datatype.html#DATATYPE-SERIAL