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   1  <?php
   2  // This file is part of Moodle - http://moodle.org/
   3  //
   4  // Moodle is free software: you can redistribute it and/or modify
   5  // it under the terms of the GNU General Public License as published by
   6  // the Free Software Foundation, either version 3 of the License, or
   7  // (at your option) any later version.
   8  //
   9  // Moodle is distributed in the hope that it will be useful,
  10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
  11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  12  // GNU General Public License for more details.
  13  //
  14  // You should have received a copy of the GNU General Public License
  15  // along with Moodle.  If not, see <http://www.gnu.org/licenses/>.
  16  
  17  /**
  18   * PGSQL specific temptables store. Needed because temporary tables
  19   * are named differently than normal tables. Also used to be able to retrieve
  20   * temp table names included in the get_tables() method of the DB.
  21   *
  22   * @package    core_dml
  23   * @copyright  2010 onwards Eloy Lafuente (stronk7) {@link http://stronk7.com}
  24   * @license    http://www.gnu.org/copyleft/gpl.html GNU GPL v3 or later
  25   */
  26  
  27  defined('MOODLE_INTERNAL') || die();
  28  
  29  require_once (__DIR__.'/moodle_temptables.php');
  30  
  31  class pgsql_native_moodle_temptables extends moodle_temptables {
  32      /**
  33       * Analyze the data in temporary tables to force statistics collection after bulk data loads.
  34       * PostgreSQL does not natively support automatic temporary table stats collection, so we do it.
  35       *
  36       * @return void
  37       */
  38      public function update_stats() {
  39          $temptables = $this->get_temptables();
  40          foreach ($temptables as $temptablename) {
  41              $this->mdb->execute("ANALYZE {".$temptablename."}");
  42          }
  43      }
  44  }