libraries/Partition.class.php

   1 <?php
   2 /* vim: set expandtab sw=4 ts=4 sts=4: */
   3 /**
   4  * Library for extracting information about the partitions
   5  *
   6  * @version $Id$
   7  */
   8
   9
  10 /**
  11  * base Partition Class
  12  */
  13 class PMA_Partition
  14 {
  15     /**
  16      * returns array of partition names for a specific db/table
  17      *
  18      * @access  public
  19      * @uses    PMA_DBI_fetch_result()
  20      * @return  array   of partition names
  21      */
  22     static public function getPartitionNames($db, $table)
  23     {
  24         if (PMA_Partition::havePartitioning()) {
  25             return PMA_DBI_fetch_result("select `PARTITION_NAME` from `information_schema`.`PARTITIONS` where `TABLE_SCHEMA` = '" . $db . "' and `TABLE_NAME` = '" . $table . "'");
  26         } else {
  27             return array();
  28         }
  29     }
  30
  31     /**
  32      * checks if MySQL server supports partitioning
  33      *
  34      * @static
  35      * @staticvar boolean $have_partitioning
  36      * @staticvar boolean $already_checked
  37      * @access  public
  38      * @uses    PMA_DBI_fetch_result()
  39      * @return  boolean
  40      */
  41     static public function havePartitioning()
  42     {
  43         static $have_partitioning = false;
  44         static $already_checked = false;
  45
  46         if (! $already_checked) {
  47             $have_partitioning = PMA_MYSQL_INT_VERSION >= 50100 && PMA_DBI_fetch_value("SHOW VARIABLES LIKE 'have_partitioning';");
  48             $already_checked = true;
  49         }
  50         return $have_partitioning;
  51     }
  52
  53 }
  54
  55 ?>