message_history-8.x-1.x-dev/message_history.install

<?php

/**
 * @file
 * Installation functions for Message History module.
 */

/**
 * Implements hook_schema().
 */
function message_history_schema() {
  $schema['message_history'] = [
    'description' => 'A record of which {users} have read which {message}s.',
    'fields' => [
      'uid' => [
        'description' => 'The {users}.uid that read the {message} mid.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ],
      'mid' => [
        'description' => 'The {message}.mid that was read.',
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
      ],
      'timestamp' => [
        'description' => 'The Unix timestamp at which the read occurred.',
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
      ],
    ],
    'primary key' => ['uid', 'mid'],
    'indexes' => [
      'mid' => ['mid'],
    ],
  ];

  return $schema;
}