includes/installer/DatabaseUpdater.php

   1 <?php
   2 /**
   3  * DBMS-specific updater helper.
   4  *
   5  * @file
   6  * @ingroup Deployment
   7  */
   8
   9 require_once( dirname(__FILE__) . '/../../maintenance/Maintenance.php' );
  10
  11 /**
  12  * Class for handling database updates. Roughly based off of updaters.inc, with
  13  * a few improvements :)
  14  *
  15  * @ingroup Deployment
  16  * @since 1.17
  17  */
  18 abstract class DatabaseUpdater {
  19
  20         /**
  21          * Array of updates to perform on the database
  22          *
  23          * @var array
  24          */
  25         protected $updates = array();
  26
  27         /**
  28          * List of extension-provided database updates
  29          * @var array
  30          */
  31         protected $extensionUpdates = array();
  32
  33         /**
  34          * Handle to the database subclass
  35          *
  36          * @var DatabaseBase
  37          */
  38         protected $db;
  39
  40         protected $shared = false;
  41
  42         protected $postDatabaseUpdateMaintenance = array(
  43                 'DeleteDefaultMessages',
  44                 'PopulateRevisionLength',
  45                 'PopulateRevisionSha1',
  46                 'PopulateImageSha1',
  47                 'FixExtLinksProtocolRelative',
  48         );
  49
  50         /**
  51          * Constructor
  52          *
  53          * @param $db DatabaseBase object to perform updates on
  54          * @param $shared bool Whether to perform updates on shared tables
  55          * @param $maintenance Maintenance Maintenance object which created us
  56          */
  57         protected function __construct( DatabaseBase &$db, $shared, Maintenance $maintenance = null ) {
  58                 $this->db = $db;
  59                 $this->db->setFlag( DBO_DDLMODE ); // For Oracle's handling of schema files
  60                 $this->shared = $shared;
  61                 if ( $maintenance ) {
  62                         $this->maintenance = $maintenance;
  63                 } else {
  64                         $this->maintenance = new FakeMaintenance;
  65                 }
  66                 $this->maintenance->setDB( $db );
  67                 $this->initOldGlobals();
  68                 $this->loadExtensions();
  69                 wfRunHooks( 'LoadExtensionSchemaUpdates', array( $this ) );
  70         }
  71
  72         /**
  73          * Initialize all of the old globals. One day this should all become
  74          * something much nicer
  75          */
  76         private function initOldGlobals() {
  77                 global $wgExtNewTables, $wgExtNewFields, $wgExtPGNewFields,
  78                         $wgExtPGAlteredFields, $wgExtNewIndexes, $wgExtModifiedFields;
  79
  80                 # For extensions only, should be populated via hooks
  81                 # $wgDBtype should be checked to specifiy the proper file
  82                 $wgExtNewTables = array(); // table, dir
  83                 $wgExtNewFields = array(); // table, column, dir
  84                 $wgExtPGNewFields = array(); // table, column, column attributes; for PostgreSQL
  85                 $wgExtPGAlteredFields = array(); // table, column, new type, conversion method; for PostgreSQL
  86                 $wgExtNewIndexes = array(); // table, index, dir
  87                 $wgExtModifiedFields = array(); // table, index, dir
  88         }
  89
  90         /**
  91          * Loads LocalSettings.php, if needed, and initialises everything needed for LoadExtensionSchemaUpdates hook
  92          */
  93         private function loadExtensions() {
  94                 if ( !defined( 'MEDIAWIKI_INSTALL' ) ) {
  95                         return; // already loaded
  96                 }
  97                 $vars = Installer::getExistingLocalSettings();
  98                 if ( !$vars ) {
  99                         return; // no LocalSettings found
 100                 }
 101                 if ( !isset( $vars['wgHooks'] ) || !isset( $vars['wgHooks']['LoadExtensionSchemaUpdates'] ) ) {
 102                         return;
 103                 }
 104                 global $wgHooks, $wgAutoloadClasses;
 105                 $wgHooks['LoadExtensionSchemaUpdates'] = $vars['wgHooks']['LoadExtensionSchemaUpdates'];
 106                 $wgAutoloadClasses = $wgAutoloadClasses + $vars['wgAutoloadClasses'];
 107         }
 108
 109         /**
 110          * @throws MWException
 111          * @param DatabaseBase $db
 112          * @param bool $shared
 113          * @param null $maintenance
 114          * @return DatabaseUpdater
 115          */
 116         public static function newForDB( &$db, $shared = false, $maintenance = null ) {
 117                 $type = $db->getType();
 118                 if( in_array( $type, Installer::getDBTypes() ) ) {
 119                         $class = ucfirst( $type ) . 'Updater';
 120                         return new $class( $db, $shared, $maintenance );
 121                 } else {
 122                         throw new MWException( __METHOD__ . ' called for unsupported $wgDBtype' );
 123                 }
 124         }
 125
 126         /**
 127          * Get a database connection to run updates
 128          *
 129          * @return DatabaseBase
 130          */
 131         public function getDB() {
 132                 return $this->db;
 133         }
 134
 135         /**
 136          * Output some text. If we're running from web, escape the text first.
 137          *
 138          * @param $str String: Text to output
 139          */
 140         public function output( $str ) {
 141                 if ( $this->maintenance->isQuiet() ) {
 142                         return;
 143                 }
 144                 global $wgCommandLineMode;
 145                 if( !$wgCommandLineMode ) {
 146                         $str = htmlspecialchars( $str );
 147                 }
 148                 echo $str;
 149                 flush();
 150         }
 151
 152         /**
 153          * Add a new update coming from an extension. This should be called by
 154          * extensions while executing the LoadExtensionSchemaUpdates hook.
 155          *
 156          * @since 1.17
 157          *
 158          * @param $update Array: the update to run. Format is the following:
 159          *                first item is the callback function, it also can be a
 160          *                simple string with the name of a function in this class,
 161          *                following elements are parameters to the function.
 162          *                Note that callback functions will receive this object as
 163          *                first parameter.
 164          */
 165         public function addExtensionUpdate( Array $update ) {
 166                 $this->extensionUpdates[] = $update;
 167         }
 168
 169         /**
 170          * Convenience wrapper for addExtensionUpdate() when adding a new table (which
 171          * is the most common usage of updaters in an extension)
 172          *
 173          * @since 1.18
 174          *
 175          * @param $tableName String Name of table to create
 176          * @param $sqlPath String Full path to the schema file
 177          */
 178         public function addExtensionTable( $tableName, $sqlPath ) {
 179                 $this->extensionUpdates[] = array( 'addTable', $tableName, $sqlPath, true );
 180         }
 181
 182         /**
 183          * @since 1.19
 184          *
 185          * @param $tableName string
 186          * @param $indexName string
 187          * @param $sqlPath string
 188          */
 189         public function addExtensionIndex( $tableName, $indexName, $sqlPath ) {
 190                 $this->extensionUpdates[] = array( 'addIndex', $tableName, $indexName, $sqlPath, true );
 191         }
 192
 193         /**
 194          *
 195          * @since 1.19
 196          *
 197          * @param $tableName string
 198          * @param $columnName string
 199          * @param $sqlPath string
 200          */
 201         public function addExtensionField( $tableName, $columnName, $sqlPath ) {
 202                 $this->extensionUpdates[] = array( 'addField', $tableName, $columnName, $sqlPath, true );
 203         }
 204
 205         /**
 206          *
 207          * @since 1.20
 208          *
 209          * @param $tableName string
 210          * @param $columnName string
 211          * @param $sqlPath string
 212          */
 213         public function dropExtensionField( $tableName, $columnName, $sqlPath ) {
 214                 $this->extensionUpdates[] = array( 'dropField', $tableName, $columnName, $sqlPath, true );
 215         }
 216
 217         /**
 218          *
 219          * @since 1.20
 220          *
 221          * @param $tableName string
 222          * @param $sqlPath string
 223          */
 224         public function dropExtensionTable( $tableName, $sqlPath ) {
 225                 $this->extensionUpdates[] = array( 'dropTable', $tableName, $sqlPath, true );
 226         }
 227
 228         /**
 229          *
 230          * @since 1.20
 231          *
 232          * @param $tableName string
 233          */
 234         public function tableExists( $tableName ) {
 235                 return ( $this->db->tableExists( $tableName, __METHOD__ ) );
 236         }
 237
 238         /**
 239          * Add a maintenance script to be run after the database updates are complete.
 240          *
 241          * @since 1.19
 242          *
 243          * @param $class string Name of a Maintenance subclass
 244          */
 245         public function addPostDatabaseUpdateMaintenance( $class ) {
 246                 $this->postDatabaseUpdateMaintenance[] = $class;
 247         }
 248
 249         /**
 250          * Get the list of extension-defined updates
 251          *
 252          * @return Array
 253          */
 254         protected function getExtensionUpdates() {
 255                 return $this->extensionUpdates;
 256         }
 257
 258         /**
 259          * @since 1.17
 260          *
 261          * @return array
 262          */
 263         public function getPostDatabaseUpdateMaintenance() {
 264                 return $this->postDatabaseUpdateMaintenance;
 265         }
 266
 267         /**
 268          * Do all the updates
 269          *
 270          * @param $what Array: what updates to perform
 271          */
 272         public function doUpdates( $what = array( 'core', 'extensions', 'purge', 'stats' ) ) {
 273                 global $wgLocalisationCacheConf, $wgVersion;
 274
 275                 $what = array_flip( $what );
 276                 if ( isset( $what['core'] ) ) {
 277                         $this->runUpdates( $this->getCoreUpdateList(), false );
 278                 }
 279                 if ( isset( $what['extensions'] ) ) {
 280                         $this->runUpdates( $this->getOldGlobalUpdates(), false );
 281                         $this->runUpdates( $this->getExtensionUpdates(), true );
 282                 }
 283
 284                 $this->setAppliedUpdates( $wgVersion, $this->updates );
 285
 286                 if ( isset( $what['stats'] ) ) {
 287                         $this->checkStats();
 288                 }
 289
 290                 if ( isset( $what['purge'] ) ) {
 291                         $this->purgeCache();
 292
 293                         if ( $wgLocalisationCacheConf['manualRecache'] ) {
 294                                 $this->rebuildLocalisationCache();
 295                         }
 296                 }
 297         }
 298
 299         /**
 300          * Helper function for doUpdates()
 301          *
 302          * @param $updates Array of updates to run
 303          * @param $passSelf Boolean: whether to pass this object we calling external
 304          *                  functions
 305          */
 306         private function runUpdates( array $updates, $passSelf ) {
 307                 foreach ( $updates as $params ) {
 308                         $func = array_shift( $params );
 309                         if( !is_array( $func ) && method_exists( $this, $func ) ) {
 310                                 $func = array( $this, $func );
 311                         } elseif ( $passSelf ) {
 312                                 array_unshift( $params, $this );
 313                         }
 314                         call_user_func_array( $func, $params );
 315                         flush();
 316                 }
 317                 $this->updates = array_merge( $this->updates, $updates );
 318         }
 319
 320         /**
 321          * @param $version
 322          * @param $updates array
 323          */
 324         protected function setAppliedUpdates( $version, $updates = array() ) {
 325                 $this->db->clearFlag( DBO_DDLMODE );
 326                 if( !$this->canUseNewUpdatelog() ) {
 327                         return;
 328                 }
 329                 $key = "updatelist-$version-" . time();
 330                 $this->db->insert( 'updatelog',
 331                         array( 'ul_key' => $key, 'ul_value' => serialize( $updates ) ),
 332                          __METHOD__ );
 333                 $this->db->setFlag( DBO_DDLMODE );
 334         }
 335
 336         /**
 337          * Helper function: check if the given key is present in the updatelog table.
 338          * Obviously, only use this for updates that occur after the updatelog table was
 339          * created!
 340          * @param $key String Name of the key to check for
 341          *
 342          * @return bool
 343          */
 344         public function updateRowExists( $key ) {
 345                 $row = $this->db->selectRow(
 346                         'updatelog',
 347                         '1',
 348                         array( 'ul_key' => $key ),
 349                         __METHOD__
 350                 );
 351                 return (bool)$row;
 352         }
 353
 354         /**
 355          * Helper function: Add a key to the updatelog table
 356          * Obviously, only use this for updates that occur after the updatelog table was
 357          * created!
 358          * @param $key String Name of key to insert
 359          * @param $val String [optional] value to insert along with the key
 360          */
 361         public function insertUpdateRow( $key, $val = null ) {
 362                 $this->db->clearFlag( DBO_DDLMODE );
 363                 $values = array( 'ul_key' => $key );
 364                 if( $val && $this->canUseNewUpdatelog() ) {
 365                         $values['ul_value'] = $val;
 366                 }
 367                 $this->db->insert( 'updatelog', $values, __METHOD__, 'IGNORE' );
 368                 $this->db->setFlag( DBO_DDLMODE );
 369         }
 370
 371         /**
 372          * Updatelog was changed in 1.17 to have a ul_value column so we can record
 373          * more information about what kind of updates we've done (that's what this
 374          * class does). Pre-1.17 wikis won't have this column, and really old wikis
 375          * might not even have updatelog at all
 376          *
 377          * @return boolean
 378          */
 379         protected function canUseNewUpdatelog() {
 380                 return $this->db->tableExists( 'updatelog', __METHOD__ ) &&
 381                         $this->db->fieldExists( 'updatelog', 'ul_value', __METHOD__ );
 382         }
 383
 384         /**
 385          * Before 1.17, we used to handle updates via stuff like
 386          * $wgExtNewTables/Fields/Indexes. This is nasty :) We refactored a lot
 387          * of this in 1.17 but we want to remain back-compatible for a while. So
 388          * load up these old global-based things into our update list.
 389          *
 390          * @return array
 391          */
 392         protected function getOldGlobalUpdates() {
 393                 global $wgExtNewFields, $wgExtNewTables, $wgExtModifiedFields,
 394                         $wgExtNewIndexes, $wgSharedDB, $wgSharedTables;
 395
 396                 $doUser = $this->shared ?
 397                         $wgSharedDB && in_array( 'user', $wgSharedTables ) :
 398                         !$wgSharedDB || !in_array( 'user', $wgSharedTables );
 399
 400                 $updates = array();
 401
 402                 foreach ( $wgExtNewTables as $tableRecord ) {
 403                         $updates[] = array(
 404                                 'addTable', $tableRecord[0], $tableRecord[1], true
 405                         );
 406                 }
 407
 408                 foreach ( $wgExtNewFields as $fieldRecord ) {
 409                         if ( $fieldRecord[0] != 'user' || $doUser ) {
 410                                 $updates[] = array(
 411                                         'addField', $fieldRecord[0], $fieldRecord[1],
 412                                                 $fieldRecord[2], true
 413                                 );
 414                         }
 415                 }
 416
 417                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 418                         $updates[] = array(
 419                                 'addIndex', $fieldRecord[0], $fieldRecord[1],
 420                                         $fieldRecord[2], true
 421                         );
 422                 }
 423
 424                 foreach ( $wgExtModifiedFields as $fieldRecord ) {
 425                         $updates[] = array(
 426                                 'modifyField', $fieldRecord[0], $fieldRecord[1],
 427                                         $fieldRecord[2], true
 428                         );
 429                 }
 430
 431                 return $updates;
 432         }
 433
 434         /**
 435          * Get an array of updates to perform on the database. Should return a
 436          * multi-dimensional array. The main key is the MediaWiki version (1.12,
 437          * 1.13...) with the values being arrays of updates, identical to how
 438          * updaters.inc did it (for now)
 439          *
 440          * @return Array
 441          */
 442         protected abstract function getCoreUpdateList();
 443
 444         /**
 445          * Applies a SQL patch
 446          * @param $path String Path to the patch file
 447          * @param $isFullPath Boolean Whether to treat $path as a relative or not
 448          */
 449         protected function applyPatch( $path, $isFullPath = false ) {
 450                 if ( $isFullPath ) {
 451                         $this->db->sourceFile( $path );
 452                 } else {
 453                         $this->db->sourceFile( $this->db->patchPath( $path ) );
 454                 }
 455         }
 456
 457         /**
 458          * Add a new table to the database
 459          * @param $name String Name of the new table
 460          * @param $patch String Path to the patch file
 461          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 462          */
 463         protected function addTable( $name, $patch, $fullpath = false ) {
 464                 if ( $this->db->tableExists( $name, __METHOD__ ) ) {
 465                         $this->output( "...$name table already exists.\n" );
 466                 } else {
 467                         $this->output( "Creating $name table..." );
 468                         $this->applyPatch( $patch, $fullpath );
 469                         $this->output( "done.\n" );
 470                 }
 471         }
 472
 473         /**
 474          * Add a new field to an existing table
 475          * @param $table String Name of the table to modify
 476          * @param $field String Name of the new field
 477          * @param $patch String Path to the patch file
 478          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 479          */
 480         protected function addField( $table, $field, $patch, $fullpath = false ) {
 481                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 482                         $this->output( "...$table table does not exist, skipping new field patch.\n" );
 483                 } elseif ( $this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 484                         $this->output( "...have $field field in $table table.\n" );
 485                 } else {
 486                         $this->output( "Adding $field field to table $table..." );
 487                         $this->applyPatch( $patch, $fullpath );
 488                         $this->output( "done.\n" );
 489                 }
 490         }
 491
 492         /**
 493          * Add a new index to an existing table
 494          * @param $table String Name of the table to modify
 495          * @param $index String Name of the new index
 496          * @param $patch String Path to the patch file
 497          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 498          */
 499         protected function addIndex( $table, $index, $patch, $fullpath = false ) {
 500                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 501                         $this->output( "...index $index already set on $table table.\n" );
 502                 } else {
 503                         $this->output( "Adding index $index to table $table... " );
 504                         $this->applyPatch( $patch, $fullpath );
 505                         $this->output( "done.\n" );
 506                 }
 507         }
 508
 509         /**
 510          * Drop a field from an existing table
 511          *
 512          * @param $table String Name of the table to modify
 513          * @param $field String Name of the old field
 514          * @param $patch String Path to the patch file
 515          * @param $fullpath Boolean Whether to treat $patch path as a relative or not
 516          */
 517         protected function dropField( $table, $field, $patch, $fullpath = false ) {
 518                 if ( $this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 519                         $this->output( "Table $table contains $field field. Dropping... " );
 520                         $this->applyPatch( $patch, $fullpath );
 521                         $this->output( "done.\n" );
 522                 } else {
 523                         $this->output( "...$table table does not contain $field field.\n" );
 524                 }
 525         }
 526
 527         /**
 528          * Drop an index from an existing table
 529          *
 530          * @param $table String: Name of the table to modify
 531          * @param $index String: Name of the old index
 532          * @param $patch String: Path to the patch file
 533          * @param $fullpath Boolean: Whether to treat $patch path as a relative or not
 534          */
 535         protected function dropIndex( $table, $index, $patch, $fullpath = false ) {
 536                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 537                         $this->output( "Dropping $index index from table $table... " );
 538                         $this->applyPatch( $patch, $fullpath );
 539                         $this->output( "done.\n" );
 540                 } else {
 541                         $this->output( "...$index key doesn't exist.\n" );
 542                 }
 543         }
 544
 545         /**
 546          * @param $table string
 547          * @param $patch string
 548          * @param $fullpath bool
 549          */
 550         protected function dropTable( $table, $patch, $fullpath = false ) {
 551                 if ( $this->db->tableExists( $table, __METHOD__ ) ) {
 552                         $this->output( "Dropping table $table... " );
 553                         $this->applyPatch( $patch, $fullpath );
 554                         $this->output( "done.\n" );
 555                 } else {
 556                         $this->output( "...$table doesn't exist.\n" );
 557                 }
 558         }
 559
 560         /**
 561          * Modify an existing field
 562          *
 563          * @param $table String: name of the table to which the field belongs
 564          * @param $field String: name of the field to modify
 565          * @param $patch String: path to the patch file
 566          * @param $fullpath Boolean: whether to treat $patch path as a relative or not
 567          */
 568         public function modifyField( $table, $field, $patch, $fullpath = false ) {
 569                 $updateKey = "$table-$field-$patch";
 570                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 571                         $this->output( "...$table table does not exist, skipping modify field patch.\n" );
 572                 } elseif ( !$this->db->fieldExists( $table, $field, __METHOD__ ) ) {
 573                         $this->output( "...$field field does not exist in $table table, skipping modify field patch.\n" );
 574                 } elseif( $this->updateRowExists( $updateKey ) ) {
 575                         $this->output( "...$field in table $table already modified by patch $patch.\n" );
 576                 } else {
 577                         $this->output( "Modifying $field field of table $table..." );
 578                         $this->applyPatch( $patch, $fullpath );
 579                         $this->insertUpdateRow( $updateKey );
 580                         $this->output( "done.\n" );
 581                 }
 582         }
 583
 584         /**
 585          * Purge the objectcache table
 586          */
 587         protected function purgeCache() {
 588                 # We can't guarantee that the user will be able to use TRUNCATE,
 589                 # but we know that DELETE is available to us
 590                 $this->output( "Purging caches..." );
 591                 $this->db->delete( 'objectcache', '*', __METHOD__ );
 592                 $this->output( "done.\n" );
 593         }
 594
 595         /**
 596          * Check the site_stats table is not properly populated.
 597          */
 598         protected function checkStats() {
 599                 $this->output( "...site_stats is populated..." );
 600                 $row = $this->db->selectRow( 'site_stats', '*', array( 'ss_row_id' => 1 ), __METHOD__ );
 601                 if ( $row === false ) {
 602                         $this->output( "data is missing! rebuilding...\n" );
 603                 } elseif ( isset( $row->site_stats ) && $row->ss_total_pages == -1 ) {
 604                         $this->output( "missing ss_total_pages, rebuilding...\n" );
 605                 } else {
 606                         $this->output( "done.\n" );
 607                         return;
 608                 }
 609                 SiteStatsInit::doAllAndCommit( $this->db );
 610         }
 611
 612         # Common updater functions
 613
 614         /**
 615          * Sets the number of active users in the site_stats table
 616          */
 617         protected function doActiveUsersInit() {
 618                 $activeUsers = $this->db->selectField( 'site_stats', 'ss_active_users', false, __METHOD__ );
 619                 if ( $activeUsers == -1 ) {
 620                         $activeUsers = $this->db->selectField( 'recentchanges',
 621                                 'COUNT( DISTINCT rc_user_text )',
 622                                 array( 'rc_user != 0', 'rc_bot' => 0, "rc_log_type != 'newusers'" ), __METHOD__
 623                         );
 624                         $this->db->update( 'site_stats',
 625                                 array( 'ss_active_users' => intval( $activeUsers ) ),
 626                                 array( 'ss_row_id' => 1 ), __METHOD__, array( 'LIMIT' => 1 )
 627                         );
 628                 }
 629                 $this->output( "...ss_active_users user count set...\n" );
 630         }
 631
 632         /**
 633          * Populates the log_user_text field in the logging table
 634          */
 635         protected function doLogUsertextPopulation() {
 636                 if ( !$this->updateRowExists( 'populate log_usertext' ) ) {
 637                         $this->output(
 638                         "Populating log_user_text field, printing progress markers. For large\n" .
 639                         "databases, you may want to hit Ctrl-C and do this manually with\n" .
 640                         "maintenance/populateLogUsertext.php.\n" );
 641
 642                         $task = $this->maintenance->runChild( 'PopulateLogUsertext' );
 643                         $task->execute();
 644                         $this->output( "done.\n" );
 645                 }
 646         }
 647
 648         /**
 649          * Migrate log params to new table and index for searching
 650          */
 651         protected function doLogSearchPopulation() {
 652                 if ( !$this->updateRowExists( 'populate log_search' ) ) {
 653                         $this->output(
 654                                 "Populating log_search table, printing progress markers. For large\n" .
 655                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 656                                 "maintenance/populateLogSearch.php.\n" );
 657
 658                         $task = $this->maintenance->runChild( 'PopulateLogSearch' );
 659                         $task->execute();
 660                         $this->output( "done.\n" );
 661                 }
 662         }
 663
 664         /**
 665          * Updates the timestamps in the transcache table
 666          */
 667         protected function doUpdateTranscacheField() {
 668                 if ( $this->updateRowExists( 'convert transcache field' ) ) {
 669                         $this->output( "...transcache tc_time already converted.\n" );
 670                         return;
 671                 }
 672
 673                 $this->output( "Converting tc_time from UNIX epoch to MediaWiki timestamp... " );
 674                 $this->applyPatch( 'patch-tc-timestamp.sql' );
 675                 $this->output( "done.\n" );
 676         }
 677
 678         /**
 679          * Update CategoryLinks collation
 680          */
 681         protected function doCollationUpdate() {
 682                 global $wgCategoryCollation;
 683                 if ( $this->db->selectField(
 684                         'categorylinks',
 685                         'COUNT(*)',
 686                         'cl_collation != ' . $this->db->addQuotes( $wgCategoryCollation ),
 687                         __METHOD__
 688                 ) == 0 ) {
 689                         $this->output( "...collations up-to-date.\n" );
 690                         return;
 691                 }
 692
 693                 $this->output( "Updating category collations..." );
 694                 $task = $this->maintenance->runChild( 'UpdateCollation' );
 695                 $task->execute();
 696                 $this->output( "...done.\n" );
 697         }
 698
 699         /**
 700          * Migrates user options from the user table blob to user_properties
 701          */
 702         protected function doMigrateUserOptions() {
 703                 $cl = $this->maintenance->runChild( 'ConvertUserOptions', 'convertUserOptions.php' );
 704                 $cl->execute();
 705                 $this->output( "done.\n" );
 706         }
 707
 708         /**
 709          * Rebuilds the localisation cache
 710          */
 711         protected function rebuildLocalisationCache() {
 712                 /**
 713                  * @var $cl RebuildLocalisationCache
 714                  */
 715                 $cl = $this->maintenance->runChild( 'RebuildLocalisationCache', 'rebuildLocalisationCache.php' );
 716                 $this->output( "Rebuilding localisation cache...\n" );
 717                 $cl->setForce();
 718                 $cl->execute();
 719                 $this->output( "done.\n" );
 720         }
 721 }