maintenance/FiveUpgrade.inc

   1 <?php
   2 /**
   3  * @file
   4  * @ingroup Maintenance
   5  */
   6
   7 require_once( 'cleanupDupes.inc' );
   8 require_once( 'userDupes.inc' );
   9 require_once( 'updaters.inc' );
  10
  11 define( 'MW_UPGRADE_COPY',     false );
  12 define( 'MW_UPGRADE_ENCODE',   true  );
  13 define( 'MW_UPGRADE_NULL',     null  );
  14 define( 'MW_UPGRADE_CALLBACK', null  ); // for self-documentation only
  15
  16 /**
  17  * @ingroup Maintenance
  18  */
  19 class FiveUpgrade {
  20         function FiveUpgrade() {
  21                 $this->conversionTables = $this->prepareWindows1252();
  22
  23                 $this->loadBalancers = array();
  24                 $this->dbw = wfGetDB( DB_MASTER );
  25                 $this->dbr = $this->streamConnection();
  26
  27                 $this->cleanupSwaps = array();
  28                 $this->emailAuth = false; # don't preauthenticate emails
  29                 $this->maxLag    = 10; # if slaves are lagged more than 10 secs, wait
  30         }
  31
  32         function doing( $step ) {
  33                 return is_null( $this->step ) || $step == $this->step;
  34         }
  35
  36         function upgrade( $step ) {
  37                 $this->step = $step;
  38
  39                 $tables = array(
  40                         'page',
  41                         'links',
  42                         'user',
  43                         'image',
  44                         'oldimage',
  45                         'watchlist',
  46                         'logging',
  47                         'archive',
  48                         'imagelinks',
  49                         'categorylinks',
  50                         'ipblocks',
  51                         'recentchanges',
  52                         'querycache' );
  53                 foreach ( $tables as $table ) {
  54                         if ( $this->doing( $table ) ) {
  55                                 $method = 'upgrade' . ucfirst( $table );
  56                                 $this->$method();
  57                         }
  58                 }
  59
  60                 if ( $this->doing( 'cleanup' ) ) {
  61                         $this->upgradeCleanup();
  62                 }
  63         }
  64
  65
  66         /**
  67          * Open a connection to the master server with the admin rights.
  68          * @return Database
  69          * @access private
  70          */
  71         function newConnection() {
  72                 $lb = wfGetLBFactory()->newMainLB();
  73                 $db = $lb->getConnection( DB_MASTER );
  74
  75                 $this->loadBalancers[] = $lb;
  76                 return $db;
  77         }
  78
  79         /**
  80          * Commit transactions and close the connections when we're done...
  81          */
  82         function close() {
  83                 foreach ( $this->loadBalancers as $lb ) {
  84                         $lb->commitMasterChanges();
  85                         $lb->closeAll();
  86                 }
  87         }
  88
  89         /**
  90          * Open a second connection to the master server, with buffering off.
  91          * This will let us stream large datasets in and write in chunks on the
  92          * other end.
  93          * @return Database
  94          * @access private
  95          */
  96         function streamConnection() {
  97                 global $wgDBtype;
  98
  99                 $timeout = 3600 * 24;
 100                 $db = $this->newConnection();
 101                 $db->bufferResults( false );
 102                 if ( $wgDBtype == 'mysql' ) {
 103                         $db->query( "SET net_read_timeout=$timeout" );
 104                         $db->query( "SET net_write_timeout=$timeout" );
 105                 }
 106                 return $db;
 107         }
 108
 109         /**
 110          * Prepare a conversion array for converting Windows Code Page 1252 to
 111          * UTF-8. This should provide proper conversion of text that was miscoded
 112          * as Windows-1252 by naughty user-agents, and doesn't rely on an outside
 113          * iconv library.
 114          *
 115          * @return array
 116          * @access private
 117          */
 118         function prepareWindows1252() {
 119                 # Mappings from:
 120                 # http://www.unicode.org/Public/MAPPINGS/VENDORS/MICSFT/WINDOWS/CP1252.TXT
 121                 static $cp1252 = array(
 122                         0x80 => 0x20AC, # EURO SIGN
 123                         0x81 => 0xFFFD, # REPLACEMENT CHARACTER (no mapping)
 124                         0x82 => 0x201A, # SINGLE LOW-9 QUOTATION MARK
 125                         0x83 => 0x0192, # LATIN SMALL LETTER F WITH HOOK
 126                         0x84 => 0x201E, # DOUBLE LOW-9 QUOTATION MARK
 127                         0x85 => 0x2026, # HORIZONTAL ELLIPSIS
 128                         0x86 => 0x2020, # DAGGER
 129                         0x87 => 0x2021, # DOUBLE DAGGER
 130                         0x88 => 0x02C6, # MODIFIER LETTER CIRCUMFLEX ACCENT
 131                         0x89 => 0x2030, # PER MILLE SIGN
 132                         0x8A => 0x0160, # LATIN CAPITAL LETTER S WITH CARON
 133                         0x8B => 0x2039, # SINGLE LEFT-POINTING ANGLE QUOTATION MARK
 134                         0x8C => 0x0152, # LATIN CAPITAL LIGATURE OE
 135                         0x8D => 0xFFFD, # REPLACEMENT CHARACTER (no mapping)
 136                         0x8E => 0x017D, # LATIN CAPITAL LETTER Z WITH CARON
 137                         0x8F => 0xFFFD, # REPLACEMENT CHARACTER (no mapping)
 138                         0x90 => 0xFFFD, # REPLACEMENT CHARACTER (no mapping)
 139                         0x91 => 0x2018, # LEFT SINGLE QUOTATION MARK
 140                         0x92 => 0x2019, # RIGHT SINGLE QUOTATION MARK
 141                         0x93 => 0x201C, # LEFT DOUBLE QUOTATION MARK
 142                         0x94 => 0x201D, # RIGHT DOUBLE QUOTATION MARK
 143                         0x95 => 0x2022, # BULLET
 144                         0x96 => 0x2013, # EN DASH
 145                         0x97 => 0x2014, # EM DASH
 146                         0x98 => 0x02DC, # SMALL TILDE
 147                         0x99 => 0x2122, # TRADE MARK SIGN
 148                         0x9A => 0x0161, # LATIN SMALL LETTER S WITH CARON
 149                         0x9B => 0x203A, # SINGLE RIGHT-POINTING ANGLE QUOTATION MARK
 150                         0x9C => 0x0153, # LATIN SMALL LIGATURE OE
 151                         0x9D => 0xFFFD, # REPLACEMENT CHARACTER (no mapping)
 152                         0x9E => 0x017E, # LATIN SMALL LETTER Z WITH CARON
 153                         0x9F => 0x0178, # LATIN CAPITAL LETTER Y WITH DIAERESIS
 154                         );
 155                 $pairs = array();
 156                 for ( $i = 0; $i < 0x100; $i++ ) {
 157                         $unicode = isset( $cp1252[$i] ) ? $cp1252[$i] : $i;
 158                         $pairs[chr( $i )] = codepointToUtf8( $unicode );
 159                 }
 160                 return $pairs;
 161         }
 162
 163         /**
 164          * Convert from 8-bit Windows-1252 to UTF-8 if necessary.
 165          * @param string $text
 166          * @return string
 167          * @access private
 168          */
 169         function conv( $text ) {
 170                 global $wgUseLatin1;
 171                 return is_null( $text )
 172                         ? null
 173                         : ( $wgUseLatin1
 174                                 ? strtr( $text, $this->conversionTables )
 175                                 : $text );
 176         }
 177
 178         /**
 179          * Dump timestamp and message to output
 180          * @param string $message
 181          * @access private
 182          */
 183         function log( $message ) {
 184                 echo wfWikiID() . ' ' . wfTimestamp( TS_DB ) . ': ' . $message . "\n";
 185                 flush();
 186         }
 187
 188         /**
 189          * Initialize the chunked-insert system.
 190          * Rows will be inserted in chunks of the given number, rather
 191          * than in a giant INSERT...SELECT query, to keep the serialized
 192          * MySQL database replication from getting hung up. This way other
 193          * things can be going on during conversion without waiting for
 194          * slaves to catch up as badly.
 195          *
 196          * @param int $chunksize Number of rows to insert at once
 197          * @param int $final Total expected number of rows / id of last row,
 198          *                   used for progress reports.
 199          * @param string $table to insert on
 200          * @param string $fname function name to report in SQL
 201          * @access private
 202          */
 203         function setChunkScale( $chunksize, $final, $table, $fname ) {
 204                 $this->chunkSize  = $chunksize;
 205                 $this->chunkFinal = $final;
 206                 $this->chunkCount = 0;
 207                 $this->chunkStartTime = wfTime();
 208                 $this->chunkOptions = array( 'IGNORE' );
 209                 $this->chunkTable = $table;
 210                 $this->chunkFunction = $fname;
 211         }
 212
 213         /**
 214          * Chunked inserts: perform an insert if we've reached the chunk limit.
 215          * Prints a progress report with estimated completion time.
 216          * @param array &$chunk -- This will be emptied if an insert is done.
 217          * @param int $key A key identifier to use in progress estimation in
 218          *                 place of the number of rows inserted. Use this if
 219          *                 you provided a max key number instead of a count
 220          *                 as the final chunk number in setChunkScale()
 221          * @access private
 222          */
 223         function addChunk( &$chunk, $key = null ) {
 224                 if ( count( $chunk ) >= $this->chunkSize ) {
 225                         $this->insertChunk( $chunk );
 226
 227                         $this->chunkCount += count( $chunk );
 228                         $now = wfTime();
 229                         $delta = $now - $this->chunkStartTime;
 230                         $rate = $this->chunkCount / $delta;
 231
 232                         if ( is_null( $key ) ) {
 233                                 $completed = $this->chunkCount;
 234                         } else {
 235                                 $completed = $key;
 236                         }
 237                         $portion = $completed / $this->chunkFinal;
 238
 239                         $estimatedTotalTime = $delta / $portion;
 240                         $eta = $this->chunkStartTime + $estimatedTotalTime;
 241
 242                         printf( "%s: %6.2f%% done on %s; ETA %s [%d/%d] %.2f/sec\n",
 243                                 wfTimestamp( TS_DB, intval( $now ) ),
 244                                 $portion * 100.0,
 245                                 $this->chunkTable,
 246                                 wfTimestamp( TS_DB, intval( $eta ) ),
 247                                 $completed,
 248                                 $this->chunkFinal,
 249                                 $rate );
 250                         flush();
 251
 252                         $chunk = array();
 253                 }
 254         }
 255
 256         /**
 257          * Chunked inserts: perform an insert unconditionally, at the end, and log.
 258          * @param array &$chunk -- This will be emptied if an insert is done.
 259          * @access private
 260          */
 261         function lastChunk( &$chunk ) {
 262                 $n = count( $chunk );
 263                 if ( $n > 0 ) {
 264                         $this->insertChunk( $chunk );
 265                 }
 266                 $this->log( "100.00% done on $this->chunkTable (last chunk $n rows)." );
 267         }
 268
 269         /**
 270          * Chunked inserts: perform an insert.
 271          * @param array &$chunk -- This will be emptied if an insert is done.
 272          * @access private
 273          */
 274         function insertChunk( &$chunk ) {
 275                 // Give slaves a chance to catch up
 276                 wfWaitForSlaves( $this->maxLag );
 277                 $this->dbw->insert( $this->chunkTable, $chunk, $this->chunkFunction, $this->chunkOptions );
 278         }
 279
 280
 281         /**
 282          * Copy and transcode a table to table_temp.
 283          * @param string $name Base name of the source table
 284          * @param string $tabledef CREATE TABLE definition, w/ $1 for the name
 285          * @param array $fields set of destination fields to these constants:
 286          *              MW_UPGRADE_COPY   - straight copy
 287          *              MW_UPGRADE_ENCODE - for old Latin1 wikis, conv to UTF-8
 288          *              MW_UPGRADE_NULL   - just put NULL
 289          * @param callable $callback An optional callback to modify the data
 290          *                           or perform other processing. Func should be
 291          *                           ( object $row, array $copy ) and return $copy
 292          * @access private
 293          */
 294         function copyTable( $name, $tabledef, $fields, $callback = null ) {
 295                 $fname = 'FiveUpgrade::copyTable';
 296
 297                 $name_temp = $name . '_temp';
 298                 $this->log( "Migrating $name table to $name_temp..." );
 299
 300                 $table_temp = $this->dbw->tableName( $name_temp );
 301
 302                 // Create temporary table; we're going to copy everything in there,
 303                 // then at the end rename the final tables into place.
 304                 $def = str_replace( '$1', $table_temp, $tabledef );
 305                 $this->dbw->query( $def, $fname );
 306
 307                 $numRecords = $this->dbw->selectField( $name, 'COUNT(*)', '', $fname );
 308                 $this->setChunkScale( 100, $numRecords, $name_temp, $fname );
 309
 310                 // Pull all records from the second, streaming database connection.
 311                 $sourceFields = array_keys( array_filter( $fields,
 312                         create_function( '$x', 'return $x !== MW_UPGRADE_NULL;' ) ) );
 313                 $result = $this->dbr->select( $name,
 314                         $sourceFields,
 315                         '',
 316                         $fname );
 317
 318                 $add = array();
 319                 while ( $row = $this->dbr->fetchObject( $result ) ) {
 320                         $copy = array();
 321                         foreach ( $fields as $field => $source ) {
 322                                 if ( $source === MW_UPGRADE_COPY ) {
 323                                         $copy[$field] = $row->$field;
 324                                 } elseif ( $source === MW_UPGRADE_ENCODE ) {
 325                                         $copy[$field] = $this->conv( $row->$field );
 326                                 } elseif ( $source === MW_UPGRADE_NULL ) {
 327                                         $copy[$field] = null;
 328                                 } else {
 329                                         $this->log( "Unknown field copy type: $field => $source" );
 330                                 }
 331                         }
 332                         if ( is_callable( $callback ) ) {
 333                                 $copy = call_user_func( $callback, $row, $copy );
 334                         }
 335                         $add[] = $copy;
 336                         $this->addChunk( $add );
 337                 }
 338                 $this->lastChunk( $add );
 339
 340                 $this->log( "Done converting $name." );
 341                 $this->cleanupSwaps[] = $name;
 342         }
 343
 344         function upgradePage() {
 345                 $fname = "FiveUpgrade::upgradePage";
 346                 $chunksize = 100;
 347
 348                 if ( $this->dbw->tableExists( 'page' ) ) {
 349                         $this->log( 'Page table already exists; aborting.' );
 350                         die( -1 );
 351                 }
 352
 353                 $this->log( "Checking cur table for unique title index and applying if necessary" );
 354                 checkDupes( true );
 355
 356                 $this->log( "...converting from cur/old to page/revision/text DB structure." );
 357
 358                 list ( $cur, $old, $page, $revision, $text ) = $this->dbw->tableNamesN( 'cur', 'old', 'page', 'revision', 'text' );
 359
 360                 $this->log( "Creating page and revision tables..." );
 361                 $this->dbw->query( "CREATE TABLE $page (
 362                         page_id int(8) unsigned NOT NULL auto_increment,
 363                         page_namespace int NOT NULL,
 364                         page_title varchar(255) binary NOT NULL,
 365                         page_restrictions tinyblob NOT NULL default '',
 366                         page_counter bigint(20) unsigned NOT NULL default '0',
 367                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 368                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 369                         page_random real unsigned NOT NULL,
 370                         page_touched char(14) binary NOT NULL default '',
 371                         page_latest int(8) unsigned NOT NULL,
 372                         page_len int(8) unsigned NOT NULL,
 373
 374                         PRIMARY KEY page_id (page_id),
 375                         UNIQUE INDEX name_title (page_namespace,page_title),
 376                         INDEX (page_random),
 377                         INDEX (page_len)
 378                         ) TYPE=InnoDB", $fname );
 379                 $this->dbw->query( "CREATE TABLE $revision (
 380                         rev_id int(8) unsigned NOT NULL auto_increment,
 381                         rev_page int(8) unsigned NOT NULL,
 382                         rev_text_id int(8) unsigned NOT NULL,
 383                         rev_comment tinyblob NOT NULL default '',
 384                         rev_user int(5) unsigned NOT NULL default '0',
 385                         rev_user_text varchar(255) binary NOT NULL default '',
 386                         rev_timestamp char(14) binary NOT NULL default '',
 387                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 388                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 389
 390                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 391                         UNIQUE INDEX rev_id (rev_id),
 392                         INDEX rev_timestamp (rev_timestamp),
 393                         INDEX page_timestamp (rev_page,rev_timestamp),
 394                         INDEX user_timestamp (rev_user,rev_timestamp),
 395                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 396                         ) TYPE=InnoDB", $fname );
 397
 398                 $maxold = intval( $this->dbw->selectField( 'old', 'max(old_id)', '', $fname ) );
 399                 $this->log( "Last old record is {$maxold}" );
 400
 401                 global $wgLegacySchemaConversion;
 402                 if ( $wgLegacySchemaConversion ) {
 403                         // Create HistoryBlobCurStub entries.
 404                         // Text will be pulled from the leftover 'cur' table at runtime.
 405                         echo "......Moving metadata from cur; using blob references to text in cur table.\n";
 406                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 407                         $cur_flags = "'object'";
 408                 } else {
 409                         // Copy all cur text in immediately: this may take longer but avoids
 410                         // having to keep an extra table around.
 411                         echo "......Moving text from cur.\n";
 412                         $cur_text = 'cur_text';
 413                         $cur_flags = "''";
 414                 }
 415
 416                 $maxcur = $this->dbw->selectField( 'cur', 'max(cur_id)', '', $fname );
 417                 $this->log( "Last cur entry is $maxcur" );
 418
 419                 /**
 420                  * Copy placeholder records for each page's current version into old
 421                  * Don't do any conversion here; text records are converted at runtime
 422                  * based on the flags (and may be originally binary!) while the meta
 423                  * fields will be converted in the old -> rev and cur -> page steps.
 424                  */
 425                 $this->setChunkScale( $chunksize, $maxcur, 'old', $fname );
 426                 $result = $this->dbr->query(
 427                         "SELECT cur_id, cur_namespace, cur_title, $cur_text AS text, cur_comment,
 428                         cur_user, cur_user_text, cur_timestamp, cur_minor_edit, $cur_flags AS flags
 429                         FROM $cur
 430                         ORDER BY cur_id", $fname );
 431                 $add = array();
 432                 while ( $row = $this->dbr->fetchObject( $result ) ) {
 433                         $add[] = array(
 434                                 'old_namespace'  => $row->cur_namespace,
 435                                 'old_title'      => $row->cur_title,
 436                                 'old_text'       => $row->text,
 437                                 'old_comment'    => $row->cur_comment,
 438                                 'old_user'       => $row->cur_user,
 439                                 'old_user_text'  => $row->cur_user_text,
 440                                 'old_timestamp'  => $row->cur_timestamp,
 441                                 'old_minor_edit' => $row->cur_minor_edit,
 442                                 'old_flags'      => $row->flags );
 443                         $this->addChunk( $add, $row->cur_id );
 444                 }
 445                 $this->lastChunk( $add );
 446
 447                 /**
 448                  * Copy revision metadata from old into revision.
 449                  * We'll also do UTF-8 conversion of usernames and comments.
 450                  */
 451                 # $newmaxold = $this->dbw->selectField( 'old', 'max(old_id)', '', $fname );
 452                 # $this->setChunkScale( $chunksize, $newmaxold, 'revision', $fname );
 453                 # $countold = $this->dbw->selectField( 'old', 'count(old_id)', '', $fname );
 454                 $countold = $this->dbw->selectField( 'old', 'max(old_id)', '', $fname );
 455                 $this->setChunkScale( $chunksize, $countold, 'revision', $fname );
 456
 457                 $this->log( "......Setting up revision table." );
 458                 $result = $this->dbr->query(
 459                         "SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 460                         old_timestamp, old_minor_edit
 461                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 462                         $fname );
 463
 464                 $add = array();
 465                 while ( $row = $this->dbr->fetchObject( $result ) ) {
 466                         $add[] = array(
 467                                 'rev_id'         =>              $row->old_id,
 468                                 'rev_page'       =>              $row->cur_id,
 469                                 'rev_text_id'    =>              $row->old_id,
 470                                 'rev_comment'    => $this->conv( $row->old_comment ),
 471                                 'rev_user'       =>              $row->old_user,
 472                                 'rev_user_text'  => $this->conv( $row->old_user_text ),
 473                                 'rev_timestamp'  =>              $row->old_timestamp,
 474                                 'rev_minor_edit' =>              $row->old_minor_edit );
 475                         $this->addChunk( $add );
 476                 }
 477                 $this->lastChunk( $add );
 478
 479
 480                 /**
 481                  * Copy page metadata from cur into page.
 482                  * We'll also do UTF-8 conversion of titles.
 483                  */
 484                 $this->log( "......Setting up page table." );
 485                 $this->setChunkScale( $chunksize, $maxcur, 'page', $fname );
 486                 $result = $this->dbr->query( "
 487                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions, cur_counter, cur_is_redirect, cur_is_new,
 488                                 cur_random, cur_touched, rev_id, LENGTH(cur_text) AS len
 489                         FROM $cur,$revision
 490                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}
 491                         ORDER BY cur_id", $fname );
 492                 $add = array();
 493                 while ( $row = $this->dbr->fetchObject( $result ) ) {
 494                         $add[] = array(
 495                                 'page_id'           =>              $row->cur_id,
 496                                 'page_namespace'    =>              $row->cur_namespace,
 497                                 'page_title'        => $this->conv( $row->cur_title ),
 498                                 'page_restrictions' =>              $row->cur_restrictions,
 499                                 'page_counter'      =>              $row->cur_counter,
 500                                 'page_is_redirect'  =>              $row->cur_is_redirect,
 501                                 'page_is_new'       =>              $row->cur_is_new,
 502                                 'page_random'       =>              $row->cur_random,
 503                                 'page_touched'      =>              $this->dbw->timestamp(),
 504                                 'page_latest'       =>              $row->rev_id,
 505                                 'page_len'          =>              $row->len );
 506                         # $this->addChunk( $add, $row->cur_id );
 507                         $this->addChunk( $add );
 508                 }
 509                 $this->lastChunk( $add );
 510
 511                 $this->log( "...done with cur/old -> page/revision." );
 512         }
 513
 514         function upgradeLinks() {
 515                 $fname = 'FiveUpgrade::upgradeLinks';
 516                 $chunksize = 200;
 517                 list ( $links, $brokenlinks, $pagelinks, $cur ) = $this->dbw->tableNamesN( 'links', 'brokenlinks', 'pagelinks', 'cur' );
 518
 519                 $this->log( 'Checking for interwiki table change in case of bogus items...' );
 520                 if ( $this->dbw->fieldExists( 'interwiki', 'iw_trans' ) ) {
 521                         $this->log( 'interwiki has iw_trans.' );
 522                 } else {
 523                         global $IP;
 524                         $this->log( 'adding iw_trans...' );
 525                         $this->dbw->sourceFile( $IP . '/maintenance/archives/patch-interwiki-trans.sql' );
 526                         $this->log( 'added iw_trans.' );
 527                 }
 528
 529                 $this->log( 'Creating pagelinks table...' );
 530                 $this->dbw->query( "
 531 CREATE TABLE $pagelinks (
 532   -- Key to the page_id of the page containing the link.
 533   pl_from int(8) unsigned NOT NULL default '0',
 534
 535   -- Key to page_namespace/page_title of the target page.
 536   -- The target page may or may not exist, and due to renames
 537   -- and deletions may refer to different page records as time
 538   -- goes by.
 539   pl_namespace int NOT NULL default '0',
 540   pl_title varchar(255) binary NOT NULL default '',
 541
 542   UNIQUE KEY pl_from(pl_from,pl_namespace,pl_title),
 543   KEY (pl_namespace,pl_title)
 544
 545 ) TYPE=InnoDB" );
 546
 547                 $this->log( 'Importing live links -> pagelinks' );
 548                 $nlinks = $this->dbw->selectField( 'links', 'count(*)', '', $fname );
 549                 if ( $nlinks ) {
 550                         $this->setChunkScale( $chunksize, $nlinks, 'pagelinks', $fname );
 551                         $result = $this->dbr->query( "
 552                           SELECT l_from,cur_namespace,cur_title
 553                                 FROM $links, $cur
 554                                 WHERE l_to=cur_id", $fname );
 555                         $add = array();
 556                         while ( $row = $this->dbr->fetchObject( $result ) ) {
 557                                 $add[] = array(
 558                                         'pl_from'      =>              $row->l_from,
 559                                         'pl_namespace' =>              $row->cur_namespace,
 560                                         'pl_title'     => $this->conv( $row->cur_title ) );
 561                                 $this->addChunk( $add );
 562                         }
 563                         $this->lastChunk( $add );
 564                 } else {
 565                         $this->log( 'no links!' );
 566                 }
 567
 568                 $this->log( 'Importing brokenlinks -> pagelinks' );
 569                 $nbrokenlinks = $this->dbw->selectField( 'brokenlinks', 'count(*)', '', $fname );
 570                 if ( $nbrokenlinks ) {
 571                         $this->setChunkScale( $chunksize, $nbrokenlinks, 'pagelinks', $fname );
 572                         $result = $this->dbr->query(
 573                                 "SELECT bl_from, bl_to FROM $brokenlinks",
 574                                 $fname );
 575                         $add = array();
 576                         while ( $row = $this->dbr->fetchObject( $result ) ) {
 577                                 $pagename = $this->conv( $row->bl_to );
 578                                 $title = Title::newFromText( $pagename );
 579                                 if ( is_null( $title ) ) {
 580                                         $this->log( "** invalid brokenlink: $row->bl_from -> '$pagename' (converted from '$row->bl_to')" );
 581                                 } else {
 582                                         $add[] = array(
 583                                                 'pl_from'      => $row->bl_from,
 584                                                 'pl_namespace' => $title->getNamespace(),
 585                                                 'pl_title'     => $title->getDBkey() );
 586                                         $this->addChunk( $add );
 587                                 }
 588                         }
 589                         $this->lastChunk( $add );
 590                 } else {
 591                         $this->log( 'no brokenlinks!' );
 592                 }
 593
 594                 $this->log( 'Done with links.' );
 595         }
 596
 597         function upgradeUser() {
 598                 // Apply unique index, if necessary:
 599                 $duper = new UserDupes( $this->dbw );
 600                 if ( $duper->hasUniqueIndex() ) {
 601                         $this->log( "Already have unique user_name index." );
 602                 } else {
 603                         $this->log( "Clearing user duplicates..." );
 604                         if ( !$duper->clearDupes() ) {
 605                                 $this->log( "WARNING: Duplicate user accounts, may explode!" );
 606                         }
 607                 }
 608
 609                 $tabledef = <<<END
 610 CREATE TABLE $1 (
 611   user_id int(5) unsigned NOT NULL auto_increment,
 612   user_name varchar(255) binary NOT NULL default '',
 613   user_real_name varchar(255) binary NOT NULL default '',
 614   user_password tinyblob NOT NULL default '',
 615   user_newpassword tinyblob NOT NULL default '',
 616   user_email tinytext NOT NULL default '',
 617   user_options blob NOT NULL default '',
 618   user_touched char(14) binary NOT NULL default '',
 619   user_token char(32) binary NOT NULL default '',
 620   user_email_authenticated CHAR(14) BINARY,
 621   user_email_token CHAR(32) BINARY,
 622   user_email_token_expires CHAR(14) BINARY,
 623
 624   PRIMARY KEY user_id (user_id),
 625   UNIQUE INDEX user_name (user_name),
 626   INDEX (user_email_token)
 627
 628 ) TYPE=InnoDB
 629 END;
 630                 $fields = array(
 631                         'user_id'                  => MW_UPGRADE_COPY,
 632                         'user_name'                => MW_UPGRADE_ENCODE,
 633                         'user_real_name'           => MW_UPGRADE_ENCODE,
 634                         'user_password'            => MW_UPGRADE_COPY,
 635                         'user_newpassword'         => MW_UPGRADE_COPY,
 636                         'user_email'               => MW_UPGRADE_ENCODE,
 637                         'user_options'             => MW_UPGRADE_ENCODE,
 638                         'user_touched'             => MW_UPGRADE_CALLBACK,
 639                         'user_token'               => MW_UPGRADE_COPY,
 640                         'user_email_authenticated' => MW_UPGRADE_CALLBACK,
 641                         'user_email_token'         => MW_UPGRADE_NULL,
 642                         'user_email_token_expires' => MW_UPGRADE_NULL );
 643                 $this->copyTable( 'user', $tabledef, $fields,
 644                         array( &$this, 'userCallback' ) );
 645         }
 646
 647         function userCallback( $row, $copy ) {
 648                 $now = $this->dbw->timestamp();
 649                 $copy['user_touched'] = $now;
 650                 $copy['user_email_authenticated'] = $this->emailAuth ? $now : null;
 651                 return $copy;
 652         }
 653
 654         function upgradeImage() {
 655                 $tabledef = <<<END
 656 CREATE TABLE $1 (
 657   img_name varchar(255) binary NOT NULL default '',
 658   img_size int(8) unsigned NOT NULL default '0',
 659   img_width int(5)  NOT NULL default '0',
 660   img_height int(5)  NOT NULL default '0',
 661   img_metadata mediumblob NOT NULL,
 662   img_bits int(3)  NOT NULL default '0',
 663   img_media_type ENUM("UNKNOWN", "BITMAP", "DRAWING", "AUDIO", "VIDEO", "MULTIMEDIA", "OFFICE", "TEXT", "EXECUTABLE", "ARCHIVE") default NULL,
 664   img_major_mime ENUM("unknown", "application", "audio", "image", "text", "video", "message", "model", "multipart") NOT NULL default "unknown",
 665   img_minor_mime varchar(32) NOT NULL default "unknown",
 666   img_description tinyblob NOT NULL default '',
 667   img_user int(5) unsigned NOT NULL default '0',
 668   img_user_text varchar(255) binary NOT NULL default '',
 669   img_timestamp char(14) binary NOT NULL default '',
 670
 671   PRIMARY KEY img_name (img_name),
 672   INDEX img_size (img_size),
 673   INDEX img_timestamp (img_timestamp)
 674 ) TYPE=InnoDB
 675 END;
 676                 $fields = array(
 677                         'img_name'        => MW_UPGRADE_ENCODE,
 678                         'img_size'        => MW_UPGRADE_COPY,
 679                         'img_width'       => MW_UPGRADE_CALLBACK,
 680                         'img_height'      => MW_UPGRADE_CALLBACK,
 681                         'img_metadata'    => MW_UPGRADE_CALLBACK,
 682                         'img_bits'        => MW_UPGRADE_CALLBACK,
 683                         'img_media_type'  => MW_UPGRADE_CALLBACK,
 684                         'img_major_mime'  => MW_UPGRADE_CALLBACK,
 685                         'img_minor_mime'  => MW_UPGRADE_CALLBACK,
 686                         'img_description' => MW_UPGRADE_ENCODE,
 687                         'img_user'        => MW_UPGRADE_COPY,
 688                         'img_user_text'   => MW_UPGRADE_ENCODE,
 689                         'img_timestamp'   => MW_UPGRADE_COPY );
 690                 $this->copyTable( 'image', $tabledef, $fields,
 691                         array( &$this, 'imageCallback' ) );
 692         }
 693
 694         function imageCallback( $row, $copy ) {
 695                 global $options;
 696                 if ( !isset( $options['noimage'] ) ) {
 697                         // Fill in the new image info fields
 698                         $info = $this->imageInfo( $row->img_name );
 699
 700                         $copy['img_width'     ] = $info['width'];
 701                         $copy['img_height'    ] = $info['height'];
 702                         $copy['img_metadata'  ] = ""; // loaded on-demand
 703                         $copy['img_bits'      ] = $info['bits'];
 704                         $copy['img_media_type'] = $info['media'];
 705                         $copy['img_major_mime'] = $info['major'];
 706                         $copy['img_minor_mime'] = $info['minor'];
 707                 }
 708
 709                 // If doing UTF8 conversion the file must be renamed
 710                 $this->renameFile( $row->img_name, 'wfImageDir' );
 711
 712                 return $copy;
 713         }
 714
 715         function imageInfo( $filename ) {
 716                 $info = array(
 717                         'width'  => 0,
 718                         'height' => 0,
 719                         'bits'   => 0,
 720                         'media'  => '',
 721                         'major'  => '',
 722                         'minor'  => '' );
 723
 724                 $magic = MimeMagic::singleton();
 725                 $mime = $magic->guessMimeType( $filename, true );
 726                 list( $info['major'], $info['minor'] ) = explode( '/', $mime );
 727
 728                 $info['media'] = $magic->getMediaType( $filename, $mime );
 729
 730                 $image = UnregisteredLocalFile::newFromPath( $filename, $mime );
 731
 732                 $info['width'] = $image->getWidth();
 733                 $info['height'] = $image->getHeight();
 734
 735                 $gis = $image->getImageSize();
 736                 if ( isset( $gis['bits'] ) ) {
 737                         $info['bits'] = $gis['bits'];
 738                 }
 739
 740                 return $info;
 741         }
 742
 743
 744         /**
 745          * Truncate a table.
 746          * @param string $table The table name to be truncated
 747          */
 748         function clearTable( $table ) {
 749                 print "Clearing $table...\n";
 750                 $tableName = $this->db->tableName( $table );
 751                 $this->db->query( "TRUNCATE $tableName" );
 752         }
 753
 754         /**
 755          * Rename a given image or archived image file to the converted filename,
 756          * leaving a symlink for URL compatibility.
 757          *
 758          * @param string $oldname pre-conversion filename
 759          * @param string $basename pre-conversion base filename for dir hashing, if an archive
 760          * @access private
 761          */
 762         function renameFile( $oldname, $subdirCallback = 'wfImageDir', $basename = null ) {
 763                 $newname = $this->conv( $oldname );
 764                 if ( $newname == $oldname ) {
 765                         // No need to rename; another field triggered this row.
 766                         return false;
 767                 }
 768
 769                 if ( is_null( $basename ) ) $basename = $oldname;
 770                 $ubasename = $this->conv( $basename );
 771                 $oldpath = call_user_func( $subdirCallback, $basename ) . '/' . $oldname;
 772                 $newpath = call_user_func( $subdirCallback, $ubasename ) . '/' . $newname;
 773
 774                 $this->log( "$oldpath -> $newpath" );
 775                 if ( rename( $oldpath, $newpath ) ) {
 776                         $relpath = wfRelativePath( $newpath, dirname( $oldpath ) );
 777                         if ( !symlink( $relpath, $oldpath ) ) {
 778                                 $this->log( "... symlink failed!" );
 779                         }
 780                         return $newname;
 781                 } else {
 782                         $this->log( "... rename failed!" );
 783                         return false;
 784                 }
 785         }
 786
 787         function upgradeOldImage() {
 788                 $tabledef = <<<END
 789 CREATE TABLE $1 (
 790   -- Base filename: key to image.img_name
 791   oi_name varchar(255) binary NOT NULL default '',
 792
 793   -- Filename of the archived file.
 794   -- This is generally a timestamp and '!' prepended to the base name.
 795   oi_archive_name varchar(255) binary NOT NULL default '',
 796
 797   -- Other fields as in image...
 798   oi_size int(8) unsigned NOT NULL default 0,
 799   oi_width int(5) NOT NULL default 0,
 800   oi_height int(5) NOT NULL default 0,
 801   oi_bits int(3) NOT NULL default 0,
 802   oi_description tinyblob NOT NULL default '',
 803   oi_user int(5) unsigned NOT NULL default '0',
 804   oi_user_text varchar(255) binary NOT NULL default '',
 805   oi_timestamp char(14) binary NOT NULL default '',
 806
 807   INDEX oi_name (oi_name(10))
 808
 809 ) TYPE=InnoDB;
 810 END;
 811                 $fields = array(
 812                         'oi_name'         => MW_UPGRADE_ENCODE,
 813                         'oi_archive_name' => MW_UPGRADE_ENCODE,
 814                         'oi_size'         => MW_UPGRADE_COPY,
 815                         'oi_width'        => MW_UPGRADE_CALLBACK,
 816                         'oi_height'       => MW_UPGRADE_CALLBACK,
 817                         'oi_bits'         => MW_UPGRADE_CALLBACK,
 818                         'oi_description'  => MW_UPGRADE_ENCODE,
 819                         'oi_user'         => MW_UPGRADE_COPY,
 820                         'oi_user_text'    => MW_UPGRADE_ENCODE,
 821                         'oi_timestamp'    => MW_UPGRADE_COPY );
 822                 $this->copyTable( 'oldimage', $tabledef, $fields,
 823                         array( &$this, 'oldimageCallback' ) );
 824         }
 825
 826         function oldimageCallback( $row, $copy ) {
 827                 global $options;
 828                 if ( !isset( $options['noimage'] ) ) {
 829                         // Fill in the new image info fields
 830                         $info = $this->imageInfo( $row->oi_archive_name, 'wfImageArchiveDir', $row->oi_name );
 831                         $copy['oi_width' ] = $info['width' ];
 832                         $copy['oi_height'] = $info['height'];
 833                         $copy['oi_bits'  ] = $info['bits'  ];
 834                 }
 835
 836                 // If doing UTF8 conversion the file must be renamed
 837                 $this->renameFile( $row->oi_archive_name, 'wfImageArchiveDir', $row->oi_name );
 838
 839                 return $copy;
 840         }
 841
 842
 843         function upgradeWatchlist() {
 844                 $fname = 'FiveUpgrade::upgradeWatchlist';
 845                 $chunksize = 100;
 846
 847                 list ( $watchlist, $watchlist_temp ) = $this->dbw->tableNamesN( 'watchlist', 'watchlist_temp' );
 848
 849                 $this->log( 'Migrating watchlist table to watchlist_temp...' );
 850                 $this->dbw->query(
 851 "CREATE TABLE $watchlist_temp (
 852   -- Key to user_id
 853   wl_user int(5) unsigned NOT NULL,
 854
 855   -- Key to page_namespace/page_title
 856   -- Note that users may watch patches which do not exist yet,
 857   -- or existed in the past but have been deleted.
 858   wl_namespace int NOT NULL default '0',
 859   wl_title varchar(255) binary NOT NULL default '',
 860
 861   -- Timestamp when user was last sent a notification e-mail;
 862   -- cleared when the user visits the page.
 863   -- FIXME: add proper null support etc
 864   wl_notificationtimestamp varchar(14) binary NOT NULL default '0',
 865
 866   UNIQUE KEY (wl_user, wl_namespace, wl_title),
 867   KEY namespace_title (wl_namespace,wl_title)
 868
 869 ) TYPE=InnoDB;", $fname );
 870
 871                 // Fix encoding for Latin-1 upgrades, add some fields,
 872                 // and double article to article+talk pairs
 873                 $numwatched = $this->dbw->selectField( 'watchlist', 'count(*)', '', $fname );
 874
 875                 $this->setChunkScale( $chunksize, $numwatched * 2, 'watchlist_temp', $fname );
 876                 $result = $this->dbr->select( 'watchlist',
 877                         array(
 878                                 'wl_user',
 879                                 'wl_namespace',
 880                                 'wl_title' ),
 881                         '',
 882                         $fname );
 883
 884                 $add = array();
 885                 while ( $row = $this->dbr->fetchObject( $result ) ) {
 886                         $add[] = array(
 887                                 'wl_user'      =>                          $row->wl_user,
 888                                 'wl_namespace' => MWNamespace::getSubject( $row->wl_namespace ),
 889                                 'wl_title'     =>             $this->conv( $row->wl_title ),
 890                                 'wl_notificationtimestamp' =>              '0' );
 891                         $this->addChunk( $add );
 892
 893                         $add[] = array(
 894                                 'wl_user'      =>                          $row->wl_user,
 895                                 'wl_namespace' =>    MWNamespace::getTalk( $row->wl_namespace ),
 896                                 'wl_title'     =>             $this->conv( $row->wl_title ),
 897                                 'wl_notificationtimestamp' =>              '0' );
 898                         $this->addChunk( $add );
 899                 }
 900                 $this->lastChunk( $add );
 901
 902                 $this->log( 'Done converting watchlist.' );
 903                 $this->cleanupSwaps[] = 'watchlist';
 904         }
 905
 906         function upgradeLogging() {
 907                 $tabledef = <<<ENDS
 908 CREATE TABLE $1 (
 909   -- Symbolic keys for the general log type and the action type
 910   -- within the log. The output format will be controlled by the
 911   -- action field, but only the type controls categorization.
 912   log_type char(10) NOT NULL default '',
 913   log_action char(10) NOT NULL default '',
 914
 915   -- Timestamp. Duh.
 916   log_timestamp char(14) NOT NULL default '19700101000000',
 917
 918   -- The user who performed this action; key to user_id
 919   log_user int unsigned NOT NULL default 0,
 920
 921   -- Key to the page affected. Where a user is the target,
 922   -- this will point to the user page.
 923   log_namespace int NOT NULL default 0,
 924   log_title varchar(255) binary NOT NULL default '',
 925
 926   -- Freeform text. Interpreted as edit history comments.
 927   log_comment varchar(255) NOT NULL default '',
 928
 929   -- LF separated list of miscellaneous parameters
 930   log_params blob NOT NULL default '',
 931
 932   KEY type_time (log_type, log_timestamp),
 933   KEY user_time (log_user, log_timestamp),
 934   KEY page_time (log_namespace, log_title, log_timestamp)
 935
 936 ) TYPE=InnoDB
 937 ENDS;
 938                 $fields = array(
 939                         'log_type'      => MW_UPGRADE_COPY,
 940                         'log_action'    => MW_UPGRADE_COPY,
 941                         'log_timestamp' => MW_UPGRADE_COPY,
 942                         'log_user'      => MW_UPGRADE_COPY,
 943                         'log_namespace' => MW_UPGRADE_COPY,
 944                         'log_title'     => MW_UPGRADE_ENCODE,
 945                         'log_comment'   => MW_UPGRADE_ENCODE,
 946                         'log_params'    => MW_UPGRADE_ENCODE );
 947                 $this->copyTable( 'logging', $tabledef, $fields );
 948         }
 949
 950         function upgradeArchive() {
 951                 $tabledef = <<<ENDS
 952 CREATE TABLE $1 (
 953   ar_namespace int NOT NULL default '0',
 954   ar_title varchar(255) binary NOT NULL default '',
 955   ar_text mediumblob NOT NULL default '',
 956
 957   ar_comment tinyblob NOT NULL default '',
 958   ar_user int(5) unsigned NOT NULL default '0',
 959   ar_user_text varchar(255) binary NOT NULL,
 960   ar_timestamp char(14) binary NOT NULL default '',
 961   ar_minor_edit tinyint(1) NOT NULL default '0',
 962
 963   ar_flags tinyblob NOT NULL default '',
 964
 965   ar_rev_id int(8) unsigned,
 966   ar_text_id int(8) unsigned,
 967
 968   KEY name_title_timestamp (ar_namespace,ar_title,ar_timestamp)
 969
 970 ) TYPE=InnoDB
 971 ENDS;
 972                 $fields = array(
 973                         'ar_namespace'  => MW_UPGRADE_COPY,
 974                         'ar_title'      => MW_UPGRADE_ENCODE,
 975                         'ar_text'       => MW_UPGRADE_COPY,
 976                         'ar_comment'    => MW_UPGRADE_ENCODE,
 977                         'ar_user'       => MW_UPGRADE_COPY,
 978                         'ar_user_text'  => MW_UPGRADE_ENCODE,
 979                         'ar_timestamp'  => MW_UPGRADE_COPY,
 980                         'ar_minor_edit' => MW_UPGRADE_COPY,
 981                         'ar_flags'      => MW_UPGRADE_COPY,
 982                         'ar_rev_id'     => MW_UPGRADE_NULL,
 983                         'ar_text_id'    => MW_UPGRADE_NULL );
 984                 $this->copyTable( 'archive', $tabledef, $fields );
 985         }
 986
 987         function upgradeImagelinks() {
 988                 global $wgUseLatin1;
 989                 if ( $wgUseLatin1 ) {
 990                         $tabledef = <<<ENDS
 991 CREATE TABLE $1 (
 992   -- Key to page_id of the page containing the image / media link.
 993   il_from int(8) unsigned NOT NULL default '0',
 994
 995   -- Filename of target image.
 996   -- This is also the page_title of the file's description page;
 997   -- all such pages are in namespace 6 (NS_FILE).
 998   il_to varchar(255) binary NOT NULL default '',
 999
1000   UNIQUE KEY il_from(il_from,il_to),
1001   KEY (il_to)
1002
1003 ) TYPE=InnoDB
1004 ENDS;
1005                         $fields = array(
1006                                 'il_from' => MW_UPGRADE_COPY,
1007                                 'il_to'   => MW_UPGRADE_ENCODE );
1008                         $this->copyTable( 'imagelinks', $tabledef, $fields );
1009                 }
1010         }
1011
1012         function upgradeCategorylinks() {
1013                 global $wgUseLatin1;
1014                 if ( $wgUseLatin1 ) {
1015                         $tabledef = <<<ENDS
1016 CREATE TABLE $1 (
1017   cl_from int(8) unsigned NOT NULL default '0',
1018   cl_to varchar(255) binary NOT NULL default '',
1019   cl_sortkey varchar(86) binary NOT NULL default '',
1020   cl_timestamp timestamp NOT NULL,
1021
1022   UNIQUE KEY cl_from(cl_from,cl_to),
1023   KEY cl_sortkey(cl_to,cl_sortkey),
1024   KEY cl_timestamp(cl_to,cl_timestamp)
1025 ) TYPE=InnoDB
1026 ENDS;
1027                         $fields = array(
1028                                 'cl_from'      => MW_UPGRADE_COPY,
1029                                 'cl_to'        => MW_UPGRADE_ENCODE,
1030                                 'cl_sortkey'   => MW_UPGRADE_ENCODE,
1031                                 'cl_timestamp' => MW_UPGRADE_COPY );
1032                         $this->copyTable( 'categorylinks', $tabledef, $fields );
1033                 }
1034         }
1035
1036         function upgradeIpblocks() {
1037                 global $wgUseLatin1;
1038                 if ( $wgUseLatin1 ) {
1039                         $tabledef = <<<ENDS
1040 CREATE TABLE $1 (
1041   ipb_id int(8) NOT NULL auto_increment,
1042   ipb_address varchar(40) binary NOT NULL default '',
1043   ipb_user int(8) unsigned NOT NULL default '0',
1044   ipb_by int(8) unsigned NOT NULL default '0',
1045   ipb_reason tinyblob NOT NULL default '',
1046   ipb_timestamp char(14) binary NOT NULL default '',
1047   ipb_auto tinyint(1) NOT NULL default '0',
1048   ipb_expiry char(14) binary NOT NULL default '',
1049
1050   PRIMARY KEY ipb_id (ipb_id),
1051   INDEX ipb_address (ipb_address),
1052   INDEX ipb_user (ipb_user)
1053
1054 ) TYPE=InnoDB
1055 ENDS;
1056                         $fields = array(
1057                                 'ipb_id'        => MW_UPGRADE_COPY,
1058                                 'ipb_address'   => MW_UPGRADE_COPY,
1059                                 'ipb_user'      => MW_UPGRADE_COPY,
1060                                 'ipb_by'        => MW_UPGRADE_COPY,
1061                                 'ipb_reason'    => MW_UPGRADE_ENCODE,
1062                                 'ipb_timestamp' => MW_UPGRADE_COPY,
1063                                 'ipb_auto'      => MW_UPGRADE_COPY,
1064                                 'ipb_expiry'    => MW_UPGRADE_COPY );
1065                         $this->copyTable( 'ipblocks', $tabledef, $fields );
1066                 }
1067         }
1068
1069         function upgradeRecentchanges() {
1070                 // There's a format change in the namespace field
1071                 $tabledef = <<<ENDS
1072 CREATE TABLE $1 (
1073   rc_id int(8) NOT NULL auto_increment,
1074   rc_timestamp varchar(14) binary NOT NULL default '',
1075   rc_cur_time varchar(14) binary NOT NULL default '',
1076
1077   rc_user int(10) unsigned NOT NULL default '0',
1078   rc_user_text varchar(255) binary NOT NULL default '',
1079
1080   rc_namespace int NOT NULL default '0',
1081   rc_title varchar(255) binary NOT NULL default '',
1082
1083   rc_comment varchar(255) binary NOT NULL default '',
1084   rc_minor tinyint(3) unsigned NOT NULL default '0',
1085
1086   rc_bot tinyint(3) unsigned NOT NULL default '0',
1087   rc_new tinyint(3) unsigned NOT NULL default '0',
1088
1089   rc_cur_id int(10) unsigned NOT NULL default '0',
1090   rc_this_oldid int(10) unsigned NOT NULL default '0',
1091   rc_last_oldid int(10) unsigned NOT NULL default '0',
1092
1093   rc_type tinyint(3) unsigned NOT NULL default '0',
1094   rc_moved_to_ns tinyint(3) unsigned NOT NULL default '0',
1095   rc_moved_to_title varchar(255) binary NOT NULL default '',
1096
1097   rc_patrolled tinyint(3) unsigned NOT NULL default '0',
1098
1099   rc_ip char(15) NOT NULL default '',
1100
1101   PRIMARY KEY rc_id (rc_id),
1102   INDEX rc_timestamp (rc_timestamp),
1103   INDEX rc_namespace_title (rc_namespace, rc_title),
1104   INDEX rc_cur_id (rc_cur_id),
1105   INDEX new_name_timestamp(rc_new,rc_namespace,rc_timestamp),
1106   INDEX rc_ip (rc_ip)
1107
1108 ) TYPE=InnoDB
1109 ENDS;
1110                 $fields = array(
1111                         'rc_id'             => MW_UPGRADE_COPY,
1112                         'rc_timestamp'      => MW_UPGRADE_COPY,
1113                         'rc_cur_time'       => MW_UPGRADE_COPY,
1114                         'rc_user'           => MW_UPGRADE_COPY,
1115                         'rc_user_text'      => MW_UPGRADE_ENCODE,
1116                         'rc_namespace'      => MW_UPGRADE_COPY,
1117                         'rc_title'          => MW_UPGRADE_ENCODE,
1118                         'rc_comment'        => MW_UPGRADE_ENCODE,
1119                         'rc_minor'          => MW_UPGRADE_COPY,
1120                         'rc_bot'            => MW_UPGRADE_COPY,
1121                         'rc_new'            => MW_UPGRADE_COPY,
1122                         'rc_cur_id'         => MW_UPGRADE_COPY,
1123                         'rc_this_oldid'     => MW_UPGRADE_COPY,
1124                         'rc_last_oldid'     => MW_UPGRADE_COPY,
1125                         'rc_type'           => MW_UPGRADE_COPY,
1126                         'rc_moved_to_ns'    => MW_UPGRADE_COPY,
1127                         'rc_moved_to_title' => MW_UPGRADE_ENCODE,
1128                         'rc_patrolled'      => MW_UPGRADE_COPY,
1129                         'rc_ip'             => MW_UPGRADE_COPY );
1130                 $this->copyTable( 'recentchanges', $tabledef, $fields );
1131         }
1132
1133         function upgradeQuerycache() {
1134                 // There's a format change in the namespace field
1135                 $tabledef = <<<ENDS
1136 CREATE TABLE $1 (
1137   -- A key name, generally the base name of of the special page.
1138   qc_type char(32) NOT NULL,
1139
1140   -- Some sort of stored value. Sizes, counts...
1141   qc_value int(5) unsigned NOT NULL default '0',
1142
1143   -- Target namespace+title
1144   qc_namespace int NOT NULL default '0',
1145   qc_title char(255) binary NOT NULL default '',
1146
1147   KEY (qc_type,qc_value)
1148
1149 ) TYPE=InnoDB
1150 ENDS;
1151                 $fields = array(
1152                         'qc_type'      => MW_UPGRADE_COPY,
1153                         'qc_value'     => MW_UPGRADE_COPY,
1154                         'qc_namespace' => MW_UPGRADE_COPY,
1155                         'qc_title'     => MW_UPGRADE_ENCODE );
1156                 $this->copyTable( 'querycache', $tabledef, $fields );
1157         }
1158
1159         /**
1160          * Rename all our temporary tables into final place.
1161          * We've left things in place so a read-only wiki can continue running
1162          * on the old code during all this.
1163          */
1164         function upgradeCleanup() {
1165                 $this->renameTable( 'old', 'text' );
1166
1167                 foreach ( $this->cleanupSwaps as $table ) {
1168                         $this->swap( $table );
1169                 }
1170         }
1171
1172         function renameTable( $from, $to ) {
1173                 $this->log( "Renaming $from to $to..." );
1174
1175                 $fromtable = $this->dbw->tableName( $from );
1176                 $totable   = $this->dbw->tableName( $to );
1177                 $this->dbw->query( "ALTER TABLE $fromtable RENAME TO $totable" );
1178         }
1179
1180         function swap( $base ) {
1181                 $this->renameTable( $base, "{$base}_old" );
1182                 $this->renameTable( "{$base}_temp", $base );
1183         }
1184
1185 }