drupal/modules/aggregator/aggregator.install

<?php
// $Id$

/**
 * Implementation of hook_install().
 */
function aggregator_install() {
  // Create tables.
  drupal_install_schema('aggregator');
}

/**
 * Implementation of hook_uninstall().
 */
function aggregator_uninstall() {
  // Remove tables.
  drupal_uninstall_schema('aggregator');

  variable_del('aggregator_allowed_html_tags');
  variable_del('aggregator_summary_items');
  variable_del('aggregator_clear');
  variable_del('aggregator_category_selector');
}

/**
 * Implementation of hook_schema().
 */
function aggregator_schema() {
  $schema['aggregator_category'] = array(
    'description' => t('Stores categories for aggregator feeds and feed items.'),
    'fields' => array(
      'cid'  => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => t('Primary Key: Unique aggregator category ID.'),
      ),
      'title' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Title of the category.'),
      ),
      'description' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => t('Description of the category'),
      ),
      'block' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
        'description' => t('The number of recent items to show within the category block.'),
      )
    ),
    'primary key' => array('cid'),
    'unique keys' => array(
      'title' => array('title'),
    ),
  );

  $schema['aggregator_category_feed'] = array(
    'description' => t('Bridge table; maps feeds to categories.'),
    'fields' => array(
      'fid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t("The feed's {aggregator_feed}.fid."),
      ),
      'cid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('The {aggregator_category}.cid to which the feed is being assigned.'),
      )
    ),
    'primary key' => array('cid', 'fid'),
    'indexes' => array(
      'fid' => array('fid'),
    ),
  );

  $schema['aggregator_category_item'] = array(
    'description' => t('Bridge table; maps feed items to categories.'),
    'fields' => array(
      'iid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t("The feed item's {aggregator_item}.iid."),
      ),
      'cid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('The {aggregator_category}.cid to which the feed item is being assigned.'),
      )
    ),
    'primary key' => array('cid', 'iid'),
    'indexes' => array(
      'iid' => array('iid'),
    ),
  );

  $schema['aggregator_feed'] = array(
    'description' => t('Stores feeds to be parsed by the aggregator.'),
    'fields' => array(
      'fid' => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => t('Primary Key: Unique feed ID.'),
      ),
      'title' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Title of the feed.'),
      ),
      'url' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('URL to the feed.'),
      ),
      'refresh' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('How often to check for new feed items, in seconds.'),
      ),
      'checked' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('Last time feed was checked for new items, as Unix timestamp.'),
      ),
      'link' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('The parent website of the feed; comes from the &lt;link&gt; element in the feed.'),
      ),
      'description' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => t("The parent website's description; comes from the &lt;description&gt; element in the feed."),
      ),
      'image' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => t('An image representing the feed.'),
      ),
      'hash' => array(
        'type' => 'varchar',
        'length' => 32,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Calculated md5 hash of the feed data, used for validating cache.'),
      ),
      'etag' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Entity tag HTTP response header, used for validating cache.'),
      ),
      'modified' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('When the feed was last modified, as a Unix timestamp.'),
      ),
      'block' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'size' => 'tiny',
        'description' => t("Number of items to display in the feed's block."),
      )
    ),
    'primary key' => array('fid'),
    'unique keys' => array(
      'url'  => array('url'),
      'title' => array('title'),
    ),
  );

  $schema['aggregator_item'] = array(
    'description' => t('Stores the individual items imported from feeds.'),
    'fields' => array(
      'iid'  => array(
        'type' => 'serial',
        'not null' => TRUE,
        'description' => t('Primary Key: Unique ID for feed item.'),
      ),
      'fid' => array(
        'type' => 'int',
        'not null' => TRUE,
        'default' => 0,
        'description' => t('The {aggregator_feed}.fid to which this item belongs.'),
      ),
      'title' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Title of the feed item.'),
      ),
      'link' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Link to the feed item.'),
      ),
      'author' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => TRUE,
        'default' => '',
        'description' => t('Author of the feed item.'),
      ),
      'description' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => t('Body of the feed item.'),
      ),
      'timestamp' => array(
        'type' => 'int',
        'not null' => FALSE,
        'description' => t('Posted date of the feed item, as a Unix timestamp.'),
      ),
      'guid' => array(
        'type' => 'varchar',
        'length' => 255,
        'not null' => FALSE,
        'description' => t('Unique identifier for the feed item.'),
      )
    ),
    'primary key' => array('iid'),
    'indexes' => array(
      'fid' => array('fid'),
    ),
  );

  return $schema;
}

/**
 * Add hash column to aggregator_feed table.
 */
function aggregator_update_7000() {
  $ret = array();
  db_add_field($ret, 'aggregator_feed', 'hash', array('type' => 'varchar', 'length' => 32, 'not null' => TRUE, 'default' => ''));
  return $ret;
}