search.install

<?php

/**
 * @file
 * Install, update, and uninstall functions for the Search module.
 */

/**
 * Implements hook_schema().
 */
function search_schema() {
  $schema['search_dataset'] = array(
    'description' => 'Stores items that will be searched.',
    'fields' => array(
      'sid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Search item ID, e.g. node ID for nodes.',
      ),
      'langcode' => array(
        'type' => 'varchar',
        'length' => '12',
        'not null' => TRUE,
        'description' => 'The {languages}.langcode of the item variant.',
        'default' => '',
      ),
      'type' => array(
        'type' => 'varchar',
        'length' => 16,
        'not null' => TRUE,
        'description' => 'Type of item, e.g. node.',
      ),
      'data' => array(
        'type' => 'text',
        'not null' => TRUE,
        'size' => 'big',
        'description' => 'List of space-separated words from the item.',
      ),
      'reindex' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'Set to force node reindexing.',
      ),
    ),
    'primary key' => array(
      'sid',
      'langcode',
      'type',
    ),
  );
  $schema['search_index'] = array(
    'description' => 'Stores the search index, associating words, items and scores.',
    'fields' => array(
      'word' => array(
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The {search_total}.word that is associated with the search item.',
      ),
      'sid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {search_dataset}.sid of the searchable item to which the word belongs.',
      ),
      'langcode' => array(
        'type' => 'varchar',
        'length' => '12',
        'not null' => TRUE,
        'description' => 'The {languages}.langcode of the item variant.',
        'default' => '',
      ),
      'type' => array(
        'type' => 'varchar',
        'length' => 16,
        'not null' => TRUE,
        'description' => 'The {search_dataset}.type of the searchable item to which the word belongs.',
      ),
      'score' => array(
        'type' => 'float',
        'not null' => FALSE,
        'description' => 'The numeric score of the word, higher being more important.',
      ),
    ),
    'indexes' => array(
      'sid_type' => array(
        'sid',
        'langcode',
        'type',
      ),
    ),
    'foreign keys' => array(
      'search_dataset' => array(
        'table' => 'search_dataset',
        'columns' => array(
          'sid' => 'sid',
          'langcode' => 'langcode',
          'type' => 'type',
        ),
      ),
    ),
    'primary key' => array(
      'word',
      'sid',
      'langcode',
      'type',
    ),
  );
  $schema['search_total'] = array(
    'description' => 'Stores search totals for words.',
    'fields' => array(
      'word' => array(
        'description' => 'Primary Key: Unique word in the search index.',
        'type' => 'varchar',
        'length' => 50,
        'not null' => TRUE,
        'default' => '',
      ),
      'count' => array(
        'description' => "The count of the word in the index using Zipf's law to equalize the probability distribution.",
        'type' => 'float',
        'not null' => FALSE,
      ),
    ),
    'primary key' => array(
      'word',
    ),
  );
  $schema['search_node_links'] = array(
    'description' => 'Stores items (like nodes) that link to other nodes, used to improve search scores for nodes that are frequently linked to.',
    'fields' => array(
      'sid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {search_dataset}.sid of the searchable item containing the link to the node.',
      ),
      'type' => array(
        'type' => 'varchar',
        'length' => 16,
        'not null' => TRUE,
        'default' => '',
        'description' => 'The {search_dataset}.type of the searchable item containing the link to the node.',
      ),
      'nid' => array(
        'type' => 'int',
        'unsigned' => TRUE,
        'not null' => TRUE,
        'default' => 0,
        'description' => 'The {node}.nid that this item links to.',
      ),
      'caption' => array(
        'type' => 'text',
        'size' => 'big',
        'not null' => FALSE,
        'description' => 'The text used to link to the {node}.nid.',
      ),
    ),
    'primary key' => array(
      'sid',
      'type',
      'nid',
    ),
    'indexes' => array(
      'nid' => array(
        'nid',
      ),
    ),
  );
  return $schema;
}

/**
 * Update search module to use the configuration system.
 *
 * @ingroup config_upgrade
 */
function search_update_8000() {
  update_variables_to_config('search.settings', array(
    'minimum_word_size' => 'index.minimum_word_size',
    'overlap_cjk' => 'index.overlap_cjk',
    'search_cron_limit' => 'index.cron_limit',
    'search_tag_weights' => 'index.tag_weights',
    'search_active_modules' => 'active_modules',
    'search_and_or_limit' => 'and_or_limit',
    'search_default_module' => 'default_module',
  ));
}

/**
 * Adds the langcode field and indexes to {search_dataset} and {search_index}.
 */
function search_update_8001() {

  // In order to upgrade the existing entries to have the correct langcode we
  // need to recreate search data through running cron.
  db_truncate('search_dataset');
  db_truncate('search_index');
  db_truncate('search_node_links');

  // Add the fields and indexes.
  db_drop_primary_key('search_dataset');
  db_add_field('search_dataset', 'langcode', array(
    'type' => 'varchar',
    'length' => '12',
    'not null' => TRUE,
    'description' => 'The {languages}.langcode of the item variant.',
    'default' => '',
  ));
  db_add_primary_key('search_dataset', array(
    'sid',
    'langcode',
    'type',
  ));
  db_drop_primary_key('search_index');
  db_drop_index('search_index', 'sid_type');
  db_add_field('search_index', 'langcode', array(
    'type' => 'varchar',
    'length' => '12',
    'not null' => TRUE,
    'description' => 'The {languages}.langcode of the item variant.',
    'default' => '',
  ), array(
    'indexes' => array(
      'sid_type' => array(
        'sid',
        'langcode',
        'type',
      ),
    ),
  ));
  db_add_primary_key('search_index', array(
    'word',
    'sid',
    'langcode',
    'type',
  ));
}