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Editorial Team
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Asked: 2026-05-20T08:37:24+00:00

I have the following table declared in MySQL: CREATE TABLE IF NOT EXISTS `ci_sessions`

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I have the following table declared in MySQL:

CREATE TABLE IF NOT EXISTS `ci_sessions` (
  `session_id` varchar(40) COLLATE utf8_bin NOT NULL DEFAULT '0',
  `ip_address` varchar(16) COLLATE utf8_bin NOT NULL DEFAULT '0',
  `user_agent` varchar(150) COLLATE utf8_bin NOT NULL,
  `last_activity` int(10) unsigned NOT NULL DEFAULT '0',
  `user_data` text COLLATE utf8_bin NOT NULL,
  PRIMARY KEY (`session_id`)
) ENGINE=InnoDB DEFAULT CHARSET=utf8 COLLATE=utf8_bin;

What would be an equivalent definition of the table in postgres, assuming my database is already using UTF-8 encoding?

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1 Answer

  1. Editorial Team
    CREATE TABLE ci_sessions (
  session_id varchar(40) NOT NULL DEFAULT '0',
  ip_address varchar(16) NOT NULL DEFAULT '0',
  user_agent varchar(150) NOT NULL,
  last_activity int4 NOT NULL DEFAULT '0',
  user_data text NOT NULL,
  PRIMARY KEY (session_id)
);

    The modifier IF NOT EXISTS has IMHO just been added to one of the newest PostgreSQL versions.

    EDIT: As unnamed horse recommended, I changed the 4th attribute from decimal(10) to int4. But I would prefer a timestamp(0) here, also. Use just timestamp without the (0) if you need microsecond precision here.

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