CRM/Core/InnoDBIndexer.php

   1 <?php
   2 /*
   3  +--------------------------------------------------------------------+
   4  | CiviCRM version 4.6                                                |
   5  +--------------------------------------------------------------------+
   6  | Copyright CiviCRM LLC (c) 2004-2014                                |
   7  +--------------------------------------------------------------------+
   8  | This file is a part of CiviCRM.                                    |
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  10  | CiviCRM is free software; you can copy, modify, and distribute it  |
  11  | under the terms of the GNU Affero General Public License           |
  12  | Version 3, 19 November 2007 and the CiviCRM Licensing Exception.   |
  13  |                                                                    |
  14  | CiviCRM is distributed in the hope that it will be useful, but     |
  15  | WITHOUT ANY WARRANTY; without even the implied warranty of         |
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  17  | See the GNU Affero General Public License for more details.        |
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  19  | You should have received a copy of the GNU Affero General Public   |
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  22  | at info[AT]civicrm[DOT]org. If you have questions about the        |
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  24  | see the CiviCRM license FAQ at http://civicrm.org/licensing        |
  25  +--------------------------------------------------------------------+
  26 */
  27
  28 /**
  29  * The InnoDB indexer is responsible for creating and destroying
  30  * full-text indices on InnoDB classes.
  31  */
  32 class CRM_Core_InnoDBIndexer {
  33   const IDX_PREFIX = "civicrm_fts_";
  34
  35   /**
  36    * @var CRM_Core_InnoDBIndexer
  37    */
  38   private static $singleton = NULL;
  39
  40   /**
  41    * @param bool $fresh
  42    * @return CRM_Core_InnoDBIndexer
  43    */
  44   public static function singleton($fresh = FALSE) {
  45     if ($fresh || self::$singleton === NULL) {
  46       $indices = array(
  47         'civicrm_address' => array(
  48           array('street_address', 'city', 'postal_code')
  49         ),
  50         'civicrm_activity' => array(
  51           array('subject', 'details'),
  52         ),
  53         'civicrm_contact' => array(
  54           array('sort_name', 'nick_name', 'display_name'),
  55         ),
  56         'civicrm_contribution' => array(
  57           array('source', 'amount_level', 'trxn_Id', 'invoice_id'),
  58         ),
  59         'civicrm_email' => array(
  60           array('email')
  61         ),
  62         'civicrm_membership' => array(
  63           array('source'),
  64         ),
  65         'civicrm_note' => array(
  66           array('subject', 'note'),
  67         ),
  68         'civicrm_participant' => array(
  69           array('source', 'fee_level'),
  70         ),
  71         'civicrm_phone' => array(
  72           array('phone'),
  73         ),
  74         'civicrm_tag' => array(
  75           array('name'),
  76         ),
  77       );
  78       $active = CRM_Core_BAO_Setting::getItem(CRM_Core_BAO_Setting::SEARCH_PREFERENCES_NAME, 'enable_innodb_fts', NULL, FALSE);
  79       self::$singleton = new self($active, $indices);
  80     }
  81     return self::$singleton;
  82   }
  83
  84   /**
  85    * (Setting Callback)
  86    * Respond to changes in the "enable_innodb_fts" setting
  87    *
  88    * @param bool $oldValue
  89    * @param bool $newValue
  90    * @param array $metadata
  91    *   Specification of the setting (per *.settings.php).
  92    */
  93   public static function onToggleFts($oldValue, $newValue, $metadata) {
  94     $indexer = CRM_Core_InnoDBIndexer::singleton();
  95     $indexer->setActive($newValue);
  96     $indexer->fixSchemaDifferences();
  97   }
  98
  99   /**
 100    * @var array (string $table => array $indices)
 101    *
 102    * ex: $indices['civicrm_contact'][0] = array('first_name', 'last_name');
 103    */
 104   protected $indices;
 105
 106   /**
 107    * @var bool
 108    */
 109   protected $isActive;
 110
 111   public function __construct($isActive, $indices) {
 112     $this->isActive = $isActive;
 113     $this->indices = $this->normalizeIndices($indices);
 114   }
 115
 116   public function fixSchemaDifferences() {
 117     // Limitation: This won't pick up stale indices on tables which are not
 118     // declared in $this->indices. That's not much of an issue for now b/c
 119     // we have a static list of tables.
 120     foreach ($this->indices as $tableName => $ign) {
 121       $todoSqls = $this->reconcileIndexSqls($tableName);
 122       foreach ($todoSqls as $todoSql) {
 123         CRM_Core_DAO::executeQuery($todoSql);
 124       }
 125     }
 126   }
 127
 128   /**
 129    * Determine if an index is expected to exist
 130    *
 131    * @param string $table
 132    * @param array $fields
 133    *   List of field names that must be in the index.
 134    * @return bool
 135    */
 136   public function hasDeclaredIndex($table, $fields) {
 137     if (!$this->isActive) {
 138       return FALSE;
 139     }
 140
 141     if (isset($this->indices[$table])) {
 142       foreach ($this->indices[$table] as $idxFields) {
 143         // TODO determine if $idxFields must be exact match or merely a subset
 144         // if (sort($fields) == sort($idxFields)) {
 145         if (array_diff($fields, $idxFields) == array()) {
 146           return TRUE;
 147         }
 148       }
 149     }
 150
 151     return FALSE;
 152   }
 153
 154   /**
 155    * Get a list of FTS index names that are currently defined in the database.
 156    *
 157    * @param string $table
 158    * @return array (string $indexName => string $indexName)
 159    */
 160   public function findActualFtsIndexNames($table) {
 161     $mysqlVersion = CRM_Core_DAO::singleValueQuery('SELECT VERSION()');
 162     if (version_compare($mysqlVersion, '5.6', '<')) {
 163       // If we're not on 5.6+, then there cannot be any InnoDB FTS indices!
 164       // Also: information_schema.innodb_sys_indexes is only available on 5.6+.
 165       return array();
 166     }
 167
 168     // Note: this only works in MySQL 5.6,  but this whole system is intended to only work in MySQL 5.6
 169     $sql = "
 170       SELECT i.name as index_name
 171       FROM information_schema.innodb_sys_tables t
 172       JOIN information_schema.innodb_sys_indexes i USING (table_id)
 173       WHERE t.name = concat(database(),'/$table')
 174       AND i.name like '" . self::IDX_PREFIX . "%'
 175       ";
 176     $dao = CRM_Core_DAO::executeQuery($sql);
 177     $indexNames = array();
 178     while ($dao->fetch()) {
 179       $indexNames[$dao->index_name] = $dao->index_name;
 180     }
 181     return $indexNames;
 182   }
 183
 184   /**
 185    * Generate a "CREATE INDEX" statement for each desired
 186    * FTS index.
 187    *
 188    * @param $table
 189    * @return array (string $indexName => string $sql)
 190    */
 191   public function buildIndexSql($table) {
 192     $sqls = array(); // array (string $idxName => string $sql)
 193     if ($this->isActive && isset($this->indices[$table])) {
 194       foreach ($this->indices[$table] as $fields) {
 195         $name = self::IDX_PREFIX . md5($table . '::' . implode(',', $fields));
 196         $sqls[$name] = sprintf("CREATE FULLTEXT INDEX %s ON %s (%s)", $name, $table, implode(',', $fields));
 197       }
 198     }
 199     return $sqls;
 200   }
 201
 202   /**
 203    * Generate a "DROP INDEX" statement for each existing FTS index
 204    *
 205    * @param string $table
 206    * @return array (string $idxName => string $sql)
 207    */
 208   public function dropIndexSql($table) {
 209     $sqls = array();
 210     $names = $this->findActualFtsIndexNames($table);
 211     foreach ($names as $name) {
 212       $sqls[$name] = sprintf("DROP INDEX %s ON %s", $name, $table);
 213     }
 214     return $sqls;
 215   }
 216
 217   /**
 218    * Construct a set of SQL statements which will create (or preserve)
 219    * required indices and destroy unneeded indices.
 220    *
 221    * @param $table
 222    * @return array
 223    */
 224   public function reconcileIndexSqls($table) {
 225     $buildIndexSqls = $this->buildIndexSql($table);
 226     $dropIndexSqls = $this->dropIndexSql($table);
 227
 228     $allIndexNames = array_unique(array_merge(
 229       array_keys($dropIndexSqls),
 230       array_keys($buildIndexSqls)
 231     ));
 232
 233     $todoSqls = array();
 234     foreach ($allIndexNames as $indexName) {
 235       if (isset($buildIndexSqls[$indexName]) && isset($dropIndexSqls[$indexName])) {
 236         // already exists
 237       }
 238       elseif (isset($buildIndexSqls[$indexName])) {
 239         $todoSqls[] = $buildIndexSqls[$indexName];
 240       }
 241       else {
 242         $todoSqls[] = $dropIndexSqls[$indexName];
 243       }
 244     }
 245     return $todoSqls;
 246   }
 247
 248   /**
 249    * Put the indices into a normalized format
 250    *
 251    * @param $indices
 252    * @return array
 253    */
 254   public function normalizeIndices($indices) {
 255     $result = array();
 256     foreach ($indices as $table => $indicesByTable) {
 257       foreach ($indicesByTable as $k => $fields) {
 258         sort($fields);
 259         $result[$table][] = $fields;
 260       }
 261     }
 262     return $result;
 263   }
 264
 265   /**
 266    * @param bool $isActive
 267    */
 268   public function setActive($isActive) {
 269     $this->isActive = $isActive;
 270   }
 271
 272   /**
 273    * @return boolean
 274    */
 275   public function getActive() {
 276     return $this->isActive;
 277   }
 278 }