includes/installer/MysqlUpdater.php

   1 <?php
   2 /**
   3  * MySQL-specific updater.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Mysql update list and mysql-specific update functions.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class MysqlUpdater extends DatabaseUpdater {
  31
  32         protected function getCoreUpdateList() {
  33                 return array(
  34                         array( 'disableContentHandlerUseDB' ),
  35
  36                         // 1.2
  37                         array( 'addField', 'ipblocks',      'ipb_id',           'patch-ipblocks.sql' ),
  38                         array( 'addField', 'ipblocks',      'ipb_expiry',       'patch-ipb_expiry.sql' ),
  39                         array( 'doInterwikiUpdate' ),
  40                         array( 'doIndexUpdate' ),
  41                         array( 'addTable', 'hitcounter', 'patch-hitcounter.sql' ),
  42                         array( 'addField', 'recentchanges', 'rc_type', 'patch-rc_type.sql' ),
  43
  44                         // 1.3
  45                         array( 'addField', 'user', 'user_real_name', 'patch-user-realname.sql' ),
  46                         array( 'addTable', 'querycache', 'patch-querycache.sql' ),
  47                         array( 'addTable', 'objectcache', 'patch-objectcache.sql' ),
  48                         array( 'addTable', 'categorylinks', 'patch-categorylinks.sql' ),
  49                         array( 'doOldLinksUpdate' ),
  50                         array( 'doFixAncientImagelinks' ),
  51                         array( 'addField', 'recentchanges', 'rc_ip', 'patch-rc_ip.sql' ),
  52
  53                         // 1.4
  54                         array( 'addIndex', 'image', 'PRIMARY', 'patch-image_name_primary.sql' ),
  55                         array( 'addField', 'recentchanges', 'rc_id', 'patch-rc_id.sql' ),
  56                         array( 'addField', 'recentchanges', 'rc_patrolled', 'patch-rc-patrol.sql' ),
  57                         array( 'addTable', 'logging', 'patch-logging.sql' ),
  58                         array( 'addField', 'user', 'user_token', 'patch-user_token.sql' ),
  59                         array( 'addField', 'watchlist', 'wl_notificationtimestamp', 'patch-email-notification.sql' ),
  60                         array( 'doWatchlistUpdate' ),
  61                         array( 'dropField', 'user', 'user_emailauthenticationtimestamp',
  62                                 'patch-email-authentication.sql' ),
  63
  64                         // 1.5
  65                         array( 'doSchemaRestructuring' ),
  66                         array( 'addField', 'logging', 'log_params', 'patch-log_params.sql' ),
  67                         array( 'checkBin', 'logging', 'log_title', 'patch-logging-title.sql', ),
  68                         array( 'addField', 'archive', 'ar_rev_id', 'patch-archive-rev_id.sql' ),
  69                         array( 'addField', 'page', 'page_len', 'patch-page_len.sql' ),
  70                         array( 'dropField', 'revision', 'inverse_timestamp', 'patch-inverse_timestamp.sql' ),
  71                         array( 'addField', 'revision', 'rev_text_id', 'patch-rev_text_id.sql' ),
  72                         array( 'addField', 'revision', 'rev_deleted', 'patch-rev_deleted.sql' ),
  73                         array( 'addField', 'image', 'img_width', 'patch-img_width.sql' ),
  74                         array( 'addField', 'image', 'img_metadata', 'patch-img_metadata.sql' ),
  75                         array( 'addField', 'user', 'user_email_token', 'patch-user_email_token.sql' ),
  76                         array( 'addField', 'archive', 'ar_text_id', 'patch-archive-text_id.sql' ),
  77                         array( 'doNamespaceSize' ),
  78                         array( 'addField', 'image', 'img_media_type', 'patch-img_media_type.sql' ),
  79                         array( 'doPagelinksUpdate' ),
  80                         array( 'dropField', 'image', 'img_type', 'patch-drop_img_type.sql' ),
  81                         array( 'doUserUniqueUpdate' ),
  82                         array( 'doUserGroupsUpdate' ),
  83                         array( 'addField', 'site_stats', 'ss_total_pages', 'patch-ss_total_articles.sql' ),
  84                         array( 'addTable', 'user_newtalk', 'patch-usernewtalk2.sql' ),
  85                         array( 'addTable', 'transcache', 'patch-transcache.sql' ),
  86                         array( 'addField', 'interwiki', 'iw_trans', 'patch-interwiki-trans.sql' ),
  87
  88                         // 1.6
  89                         array( 'doWatchlistNull' ),
  90                         array( 'addIndex', 'logging', 'times', 'patch-logging-times-index.sql' ),
  91                         array( 'addField', 'ipblocks', 'ipb_range_start', 'patch-ipb_range_start.sql' ),
  92                         array( 'doPageRandomUpdate' ),
  93                         array( 'addField', 'user', 'user_registration', 'patch-user_registration.sql' ),
  94                         array( 'doTemplatelinksUpdate' ),
  95                         array( 'addTable', 'externallinks', 'patch-externallinks.sql' ),
  96                         array( 'addTable', 'job', 'patch-job.sql' ),
  97                         array( 'addField', 'site_stats', 'ss_images', 'patch-ss_images.sql' ),
  98                         array( 'addTable', 'langlinks', 'patch-langlinks.sql' ),
  99                         array( 'addTable', 'querycache_info', 'patch-querycacheinfo.sql' ),
 100                         array( 'addTable', 'filearchive', 'patch-filearchive.sql' ),
 101                         array( 'addField', 'ipblocks', 'ipb_anon_only', 'patch-ipb_anon_only.sql' ),
 102                         array( 'addIndex', 'recentchanges', 'rc_ns_usertext', 'patch-recentchanges-utindex.sql' ),
 103                         array( 'addIndex', 'recentchanges', 'rc_user_text', 'patch-rc_user_text-index.sql' ),
 104
 105                         // 1.9
 106                         array( 'addField', 'user', 'user_newpass_time', 'patch-user_newpass_time.sql' ),
 107                         array( 'addTable', 'redirect', 'patch-redirect.sql' ),
 108                         array( 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ),
 109                         array( 'addField', 'ipblocks', 'ipb_enable_autoblock', 'patch-ipb_optional_autoblock.sql' ),
 110                         array( 'doBacklinkingIndicesUpdate' ),
 111                         array( 'addField', 'recentchanges', 'rc_old_len', 'patch-rc_len.sql' ),
 112                         array( 'addField', 'user', 'user_editcount', 'patch-user_editcount.sql' ),
 113
 114                         // 1.10
 115                         array( 'doRestrictionsUpdate' ),
 116                         array( 'addField', 'logging', 'log_id', 'patch-log_id.sql' ),
 117                         array( 'addField', 'revision', 'rev_parent_id', 'patch-rev_parent_id.sql' ),
 118                         array( 'addField', 'page_restrictions', 'pr_id', 'patch-page_restrictions_sortkey.sql' ),
 119                         array( 'addField', 'revision', 'rev_len', 'patch-rev_len.sql' ),
 120                         array( 'addField', 'recentchanges', 'rc_deleted', 'patch-rc_deleted.sql' ),
 121                         array( 'addField', 'logging', 'log_deleted', 'patch-log_deleted.sql' ),
 122                         array( 'addField', 'archive', 'ar_deleted', 'patch-ar_deleted.sql' ),
 123                         array( 'addField', 'ipblocks', 'ipb_deleted', 'patch-ipb_deleted.sql' ),
 124                         array( 'addField', 'filearchive', 'fa_deleted', 'patch-fa_deleted.sql' ),
 125                         array( 'addField', 'archive', 'ar_len', 'patch-ar_len.sql' ),
 126
 127                         // 1.11
 128                         array( 'addField', 'ipblocks', 'ipb_block_email', 'patch-ipb_emailban.sql' ),
 129                         array( 'doCategorylinksIndicesUpdate' ),
 130                         array( 'addField', 'oldimage', 'oi_metadata', 'patch-oi_metadata.sql' ),
 131                         array( 'addIndex', 'archive', 'usertext_timestamp', 'patch-archive-user-index.sql' ),
 132                         array( 'addIndex', 'image', 'img_usertext_timestamp', 'patch-image-user-index.sql' ),
 133                         array( 'addIndex', 'oldimage', 'oi_usertext_timestamp', 'patch-oldimage-user-index.sql' ),
 134                         array( 'addField', 'archive', 'ar_page_id', 'patch-archive-page_id.sql' ),
 135                         array( 'addField', 'image', 'img_sha1', 'patch-img_sha1.sql' ),
 136
 137                         // 1.12
 138                         array( 'addTable', 'protected_titles', 'patch-protected_titles.sql' ),
 139
 140                         // 1.13
 141                         array( 'addField', 'ipblocks', 'ipb_by_text', 'patch-ipb_by_text.sql' ),
 142                         array( 'addTable', 'page_props', 'patch-page_props.sql' ),
 143                         array( 'addTable', 'updatelog', 'patch-updatelog.sql' ),
 144                         array( 'addTable', 'category', 'patch-category.sql' ),
 145                         array( 'doCategoryPopulation' ),
 146                         array( 'addField', 'archive', 'ar_parent_id', 'patch-ar_parent_id.sql' ),
 147                         array( 'addField', 'user_newtalk', 'user_last_timestamp', 'patch-user_last_timestamp.sql' ),
 148                         array( 'doPopulateParentId' ),
 149                         array( 'checkBin', 'protected_titles', 'pt_title', 'patch-pt_title-encoding.sql', ),
 150                         array( 'doMaybeProfilingMemoryUpdate' ),
 151                         array( 'doFilearchiveIndicesUpdate' ),
 152
 153                         // 1.14
 154                         array( 'addField', 'site_stats', 'ss_active_users', 'patch-ss_active_users.sql' ),
 155                         array( 'doActiveUsersInit' ),
 156                         array( 'addField', 'ipblocks', 'ipb_allow_usertalk', 'patch-ipb_allow_usertalk.sql' ),
 157
 158                         // 1.15
 159                         array( 'doUniquePlTlIl' ),
 160                         array( 'addTable', 'change_tag', 'patch-change_tag.sql' ),
 161                         array( 'addTable', 'tag_summary', 'patch-tag_summary.sql' ),
 162                         array( 'addTable', 'valid_tag', 'patch-valid_tag.sql' ),
 163
 164                         // 1.16
 165                         array( 'addTable', 'user_properties', 'patch-user_properties.sql' ),
 166                         array( 'addTable', 'log_search', 'patch-log_search.sql' ),
 167                         array( 'addField', 'logging', 'log_user_text', 'patch-log_user_text.sql' ),
 168                         # listed separately from the previous update because 1.16 was released without this update
 169                         array( 'doLogUsertextPopulation' ),
 170                         array( 'doLogSearchPopulation' ),
 171                         array( 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ),
 172                         array( 'addIndex', 'log_search', 'ls_field_val', 'patch-log_search-rename-index.sql' ),
 173                         array( 'addIndex', 'change_tag', 'change_tag_rc_tag', 'patch-change_tag-indexes.sql' ),
 174                         array( 'addField', 'redirect', 'rd_interwiki', 'patch-rd_interwiki.sql' ),
 175                         array( 'doUpdateTranscacheField' ),
 176                         array( 'doUpdateMimeMinorField' ),
 177
 178                         // 1.17
 179                         array( 'addTable', 'iwlinks', 'patch-iwlinks.sql' ),
 180                         array( 'addIndex', 'iwlinks', 'iwl_prefix_title_from', 'patch-rename-iwl_prefix.sql' ),
 181                         array( 'addField', 'updatelog', 'ul_value', 'patch-ul_value.sql' ),
 182                         array( 'addField', 'interwiki', 'iw_api', 'patch-iw_api_and_wikiid.sql' ),
 183                         array( 'dropIndex', 'iwlinks', 'iwl_prefix', 'patch-kill-iwl_prefix.sql' ),
 184                         array( 'addField', 'categorylinks', 'cl_collation', 'patch-categorylinks-better-collation.sql' ),
 185                         array( 'doClFieldsUpdate' ),
 186                         array( 'doCollationUpdate' ),
 187                         array( 'addTable', 'msg_resource', 'patch-msg_resource.sql' ),
 188                         array( 'addTable', 'module_deps', 'patch-module_deps.sql' ),
 189                         array( 'dropIndex', 'archive', 'ar_page_revid', 'patch-archive_kill_ar_page_revid.sql' ),
 190                         array( 'addIndex', 'archive', 'ar_revid', 'patch-archive_ar_revid.sql' ),
 191                         array( 'doLangLinksLengthUpdate' ),
 192
 193                         // 1.18
 194                         array( 'doUserNewTalkTimestampNotNull' ),
 195                         array( 'addIndex', 'user', 'user_email', 'patch-user_email_index.sql' ),
 196                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
 197                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
 198                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
 199
 200                         // 1.19
 201                         array( 'addIndex', 'logging', 'type_action', 'patch-logging-type-action-index.sql' ),
 202                         array( 'addField', 'revision', 'rev_sha1', 'patch-rev_sha1.sql' ),
 203                         array( 'doMigrateUserOptions' ),
 204                         array( 'dropField', 'user', 'user_options', 'patch-drop-user_options.sql' ),
 205                         array( 'addField', 'archive', 'ar_sha1', 'patch-ar_sha1.sql' ),
 206                         array( 'addIndex', 'page', 'page_redirect_namespace_len',
 207                                 'patch-page_redirect_namespace_len.sql' ),
 208                         array( 'addField', 'uploadstash', 'us_chunk_inx', 'patch-uploadstash_chunk.sql' ),
 209                         array( 'addfield', 'job', 'job_timestamp', 'patch-jobs-add-timestamp.sql' ),
 210
 211                         // 1.20
 212                         array( 'addIndex', 'revision', 'page_user_timestamp', 'patch-revision-user-page-index.sql' ),
 213                         array( 'addField', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id.sql' ),
 214                         array( 'addIndex', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id-index.sql' ),
 215                         array( 'dropField', 'category', 'cat_hidden', 'patch-cat_hidden.sql' ),
 216
 217                         // 1.21
 218                         array( 'addField', 'revision', 'rev_content_format', 'patch-revision-rev_content_format.sql' ),
 219                         array( 'addField', 'revision', 'rev_content_model', 'patch-revision-rev_content_model.sql' ),
 220                         array( 'addField',      'archive',      'ar_content_format',            'patch-archive-ar_content_format.sql' ),
 221                         array( 'addField',      'archive',      'ar_content_model',                 'patch-archive-ar_content_model.sql' ),
 222                         array( 'addField',      'page',     'page_content_model',               'patch-page-page_content_model.sql' ),
 223                         array( 'enableContentHandlerUseDB' ),
 224                         array( 'dropField', 'site_stats',   'ss_admins',        'patch-drop-ss_admins.sql' ),
 225                         array( 'dropField', 'recentchanges', 'rc_moved_to_title',            'patch-rc_moved.sql' ),
 226                         array( 'addTable', 'sites',                            'patch-sites.sql' ),
 227                         array( 'addField', 'filearchive', 'fa_sha1', 'patch-fa_sha1.sql' ),
 228                         array( 'addField', 'job', 'job_token', 'patch-job_token.sql' ),
 229                         array( 'addField', 'job', 'job_attempts', 'patch-job_attempts.sql' ),
 230                         array( 'doEnableProfiling' ),
 231                         array( 'addField', 'uploadstash', 'us_props', 'patch-uploadstash-us_props.sql' ),
 232                         array( 'modifyField', 'user_groups', 'ug_group', 'patch-ug_group-length-increase-255.sql' ),
 233                         array( 'modifyField', 'user_former_groups', 'ufg_group',
 234                                 'patch-ufg_group-length-increase-255.sql' ),
 235                         array( 'addIndex', 'page_props', 'pp_propname_page',
 236                                 'patch-page_props-propname-page-index.sql' ),
 237                         array( 'addIndex', 'image', 'img_media_mime', 'patch-img_media_mime-index.sql' ),
 238
 239                         // 1.22
 240                         array( 'doIwlinksIndexNonUnique' ),
 241                         array( 'addIndex', 'iwlinks', 'iwl_prefix_from_title',
 242                                 'patch-iwlinks-from-title-index.sql' ),
 243                         array( 'addField', 'archive', 'ar_id', 'patch-archive-ar_id.sql' ),
 244                         array( 'addField', 'externallinks', 'el_id', 'patch-externallinks-el_id.sql' ),
 245                         array( 'addField', 'recentchanges', 'rc_source', 'patch-rc_source.sql' ),
 246                 );
 247         }
 248
 249         /**
 250          * 1.4 betas were missing the 'binary' marker from logging.log_title,
 251          * which causes a collation mismatch error on joins in MySQL 4.1.
 252          *
 253          * @param string $table Table name
 254          * @param string $field Field name to check
 255          * @param string $patchFile Path to the patch to correct the field
 256          * @return bool
 257          */
 258         protected function checkBin( $table, $field, $patchFile ) {
 259                 if ( !$this->doTable( $table ) ) {
 260                         return true;
 261                 }
 262
 263                 $fieldInfo = $this->db->fieldInfo( $table, $field );
 264                 if ( $fieldInfo->isBinary() ) {
 265                         $this->output( "...$table table has correct $field encoding.\n" );
 266                 } else {
 267                         $this->applyPatch( $patchFile, false, "Fixing $field encoding on $table table" );
 268                 }
 269         }
 270
 271         /**
 272          * Check whether an index contain a field
 273          *
 274          * @param string $table Table name
 275          * @param string $index Index name to check
 276          * @param string $field Field that should be in the index
 277          * @return bool
 278          */
 279         protected function indexHasField( $table, $index, $field ) {
 280                 if ( !$this->doTable( $table ) ) {
 281                         return true;
 282                 }
 283
 284                 $info = $this->db->indexInfo( $table, $index, __METHOD__ );
 285                 if ( $info ) {
 286                         foreach ( $info as $row ) {
 287                                 if ( $row->Column_name == $field ) {
 288                                         $this->output( "...index $index on table $table includes field $field.\n" );
 289
 290                                         return true;
 291                                 }
 292                         }
 293                 }
 294                 $this->output( "...index $index on table $table has no field $field; added.\n" );
 295
 296                 return false;
 297         }
 298
 299         /**
 300          * Check that interwiki table exists; if it doesn't source it
 301          */
 302         protected function doInterwikiUpdate() {
 303                 global $IP;
 304
 305                 if ( !$this->doTable( 'interwiki' ) ) {
 306                         return true;
 307                 }
 308
 309                 if ( $this->db->tableExists( "interwiki", __METHOD__ ) ) {
 310                         $this->output( "...already have interwiki table\n" );
 311
 312                         return;
 313                 }
 314
 315                 $this->applyPatch( 'patch-interwiki.sql', false, 'Creating interwiki table' );
 316                 $this->applyPatch(
 317                         "$IP/maintenance/interwiki.sql",
 318                         true,
 319                         'Adding default interwiki definitions'
 320                 );
 321         }
 322
 323         /**
 324          * Check that proper indexes are in place
 325          */
 326         protected function doIndexUpdate() {
 327                 $meta = $this->db->fieldInfo( 'recentchanges', 'rc_timestamp' );
 328                 if ( $meta === false ) {
 329                         throw new MWException( 'Missing rc_timestamp field of recentchanges table. Should not happen.' );
 330                 }
 331                 if ( $meta->isMultipleKey() ) {
 332                         $this->output( "...indexes seem up to 20031107 standards.\n" );
 333
 334                         return;
 335                 }
 336
 337                 $this->applyPatch( 'patch-indexes.sql', true, "Updating indexes to 20031107" );
 338         }
 339
 340         protected function doOldLinksUpdate() {
 341                 $cl = $this->maintenance->runChild( 'ConvertLinks' );
 342                 $cl->execute();
 343         }
 344
 345         protected function doFixAncientImagelinks() {
 346                 $info = $this->db->fieldInfo( 'imagelinks', 'il_from' );
 347                 if ( !$info || $info->type() !== 'string' ) {
 348                         $this->output( "...il_from OK\n" );
 349
 350                         return;
 351                 }
 352
 353                 $applied = $this->applyPatch(
 354                         'patch-fix-il_from.sql',
 355                         false,
 356                         'Fixing ancient broken imagelinks table.'
 357                 );
 358
 359                 if ( $applied ) {
 360                         $this->output( "NOTE: you will have to run maintenance/refreshLinks.php after this." );
 361                 }
 362         }
 363
 364         /**
 365          * Check if we need to add talk page rows to the watchlist
 366          */
 367         function doWatchlistUpdate() {
 368                 $talk = $this->db->selectField( 'watchlist', 'count(*)', 'wl_namespace & 1', __METHOD__ );
 369                 $nontalk = $this->db->selectField(
 370                         'watchlist',
 371                         'count(*)',
 372                         'NOT (wl_namespace & 1)',
 373                         __METHOD__
 374                 );
 375                 if ( $talk == $nontalk ) {
 376                         $this->output( "...watchlist talk page rows already present.\n" );
 377
 378                         return;
 379                 }
 380
 381                 $this->output( "Adding missing watchlist talk page rows... " );
 382                 $this->db->insertSelect( 'watchlist', 'watchlist',
 383                         array(
 384                                 'wl_user' => 'wl_user',
 385                                 'wl_namespace' => 'wl_namespace | 1',
 386                                 'wl_title' => 'wl_title',
 387                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 388                         ), array( 'NOT (wl_namespace & 1)' ), __METHOD__, 'IGNORE' );
 389                 $this->output( "done.\n" );
 390         }
 391
 392         function doSchemaRestructuring() {
 393                 if ( $this->db->tableExists( 'page', __METHOD__ ) ) {
 394                         $this->output( "...page table already exists.\n" );
 395
 396                         return;
 397                 }
 398
 399                 $this->output( "...converting from cur/old to page/revision/text DB structure.\n" );
 400                 $this->output( wfTimestamp( TS_DB ) );
 401                 $this->output( "......checking for duplicate entries.\n" );
 402
 403                 list( $cur, $old, $page, $revision, $text ) = $this->db->tableNamesN(
 404                         'cur',
 405                         'old',
 406                         'page',
 407                         'revision',
 408                         'text'
 409                 );
 410
 411                 $rows = $this->db->query( "
 412                         SELECT cur_title, cur_namespace, COUNT(cur_namespace) AS c
 413                         FROM $cur
 414                         GROUP BY cur_title, cur_namespace
 415                         HAVING c>1",
 416                         __METHOD__
 417                 );
 418
 419                 if ( $rows->numRows() > 0 ) {
 420                         $this->output( wfTimestamp( TS_DB ) );
 421                         $this->output( "......<b>Found duplicate entries</b>\n" );
 422                         $this->output( sprintf( "<b>      %-60s %3s %5s</b>\n", 'Title', 'NS', 'Count' ) );
 423                         $duplicate = array();
 424                         foreach ( $rows as $row ) {
 425                                 if ( !isset( $duplicate[$row->cur_namespace] ) ) {
 426                                         $duplicate[$row->cur_namespace] = array();
 427                                 }
 428
 429                                 $duplicate[$row->cur_namespace][] = $row->cur_title;
 430                                 $this->output( sprintf(
 431                                         "      %-60s %3s %5s\n",
 432                                         $row->cur_title, $row->cur_namespace,
 433                                         $row->c
 434                                 ) );
 435                         }
 436                         $sql = "SELECT cur_title, cur_namespace, cur_id, cur_timestamp FROM $cur WHERE ";
 437                         $firstCond = true;
 438                         foreach ( $duplicate as $ns => $titles ) {
 439                                 if ( $firstCond ) {
 440                                         $firstCond = false;
 441                                 } else {
 442                                         $sql .= ' OR ';
 443                                 }
 444                                 $sql .= "( cur_namespace = {$ns} AND cur_title in (";
 445                                 $first = true;
 446                                 foreach ( $titles as $t ) {
 447                                         if ( $first ) {
 448                                                 $sql .= $this->db->addQuotes( $t );
 449                                                 $first = false;
 450                                         } else {
 451                                                 $sql .= ', ' . $this->db->addQuotes( $t );
 452                                         }
 453                                 }
 454                                 $sql .= ") ) \n";
 455                         }
 456                         # By sorting descending, the most recent entry will be the first in the list.
 457                         # All following entries will be deleted by the next while-loop.
 458                         $sql .= 'ORDER BY cur_namespace, cur_title, cur_timestamp DESC';
 459
 460                         $rows = $this->db->query( $sql, __METHOD__ );
 461
 462                         $prev_title = $prev_namespace = false;
 463                         $deleteId = array();
 464
 465                         foreach ( $rows as $row ) {
 466                                 if ( $prev_title == $row->cur_title && $prev_namespace == $row->cur_namespace ) {
 467                                         $deleteId[] = $row->cur_id;
 468                                 }
 469                                 $prev_title = $row->cur_title;
 470                                 $prev_namespace = $row->cur_namespace;
 471                         }
 472                         $sql = "DELETE FROM $cur WHERE cur_id IN ( " . join( ',', $deleteId ) . ')';
 473                         $this->db->query( $sql, __METHOD__ );
 474                         $this->output( wfTimestamp( TS_DB ) );
 475                         $this->output( "......<b>Deleted</b> " . $this->db->affectedRows() . " records.\n" );
 476                 }
 477
 478                 $this->output( wfTimestamp( TS_DB ) );
 479                 $this->output( "......Creating tables.\n" );
 480                 $this->db->query( "CREATE TABLE $page (
 481                         page_id int(8) unsigned NOT NULL auto_increment,
 482                         page_namespace int NOT NULL,
 483                         page_title varchar(255) binary NOT NULL,
 484                         page_restrictions tinyblob NOT NULL,
 485                         page_counter bigint(20) unsigned NOT NULL default '0',
 486                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 487                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 488                         page_random real unsigned NOT NULL,
 489                         page_touched char(14) binary NOT NULL default '',
 490                         page_latest int(8) unsigned NOT NULL,
 491                         page_len int(8) unsigned NOT NULL,
 492
 493                         PRIMARY KEY page_id (page_id),
 494                         UNIQUE INDEX name_title (page_namespace,page_title),
 495                         INDEX (page_random),
 496                         INDEX (page_len)
 497                         ) ENGINE=InnoDB", __METHOD__ );
 498                 $this->db->query( "CREATE TABLE $revision (
 499                         rev_id int(8) unsigned NOT NULL auto_increment,
 500                         rev_page int(8) unsigned NOT NULL,
 501                         rev_comment tinyblob NOT NULL,
 502                         rev_user int(5) unsigned NOT NULL default '0',
 503                         rev_user_text varchar(255) binary NOT NULL default '',
 504                         rev_timestamp char(14) binary NOT NULL default '',
 505                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 506                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 507                         rev_len int(8) unsigned,
 508                         rev_parent_id int(8) unsigned default NULL,
 509                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 510                         UNIQUE INDEX rev_id (rev_id),
 511                         INDEX rev_timestamp (rev_timestamp),
 512                         INDEX page_timestamp (rev_page,rev_timestamp),
 513                         INDEX user_timestamp (rev_user,rev_timestamp),
 514                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 515                         ) ENGINE=InnoDB", __METHOD__ );
 516
 517                 $this->output( wfTimestamp( TS_DB ) );
 518                 $this->output( "......Locking tables.\n" );
 519                 $this->db->query(
 520                         "LOCK TABLES $page WRITE, $revision WRITE, $old WRITE, $cur WRITE",
 521                         __METHOD__
 522                 );
 523
 524                 $maxold = intval( $this->db->selectField( 'old', 'max(old_id)', '', __METHOD__ ) );
 525                 $this->output( wfTimestamp( TS_DB ) );
 526                 $this->output( "......maxold is {$maxold}\n" );
 527
 528                 $this->output( wfTimestamp( TS_DB ) );
 529                 global $wgLegacySchemaConversion;
 530                 if ( $wgLegacySchemaConversion ) {
 531                         // Create HistoryBlobCurStub entries.
 532                         // Text will be pulled from the leftover 'cur' table at runtime.
 533                         $this->output( "......Moving metadata from cur; using blob references to text in cur table.\n" );
 534                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 535                         $cur_flags = "'object'";
 536                 } else {
 537                         // Copy all cur text in immediately: this may take longer but avoids
 538                         // having to keep an extra table around.
 539                         $this->output( "......Moving text from cur.\n" );
 540                         $cur_text = 'cur_text';
 541                         $cur_flags = "''";
 542                 }
 543                 $this->db->query(
 544                         "INSERT INTO $old (old_namespace, old_title, old_text, old_comment, old_user,
 545                                 old_user_text, old_timestamp, old_minor_edit, old_flags)
 546                         SELECT cur_namespace, cur_title, $cur_text, cur_comment, cur_user, cur_user_text,
 547                                 cur_timestamp, cur_minor_edit, $cur_flags
 548                         FROM $cur",
 549                         __METHOD__
 550                 );
 551
 552                 $this->output( wfTimestamp( TS_DB ) );
 553                 $this->output( "......Setting up revision table.\n" );
 554                 $this->db->query(
 555                         "INSERT INTO $revision (rev_id, rev_page, rev_comment, rev_user,
 556                                 rev_user_text, rev_timestamp, rev_minor_edit)
 557                         SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 558                                 old_timestamp, old_minor_edit
 559                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 560                         __METHOD__
 561                 );
 562
 563                 $this->output( wfTimestamp( TS_DB ) );
 564                 $this->output( "......Setting up page table.\n" );
 565                 $this->db->query(
 566                         "INSERT INTO $page (page_id, page_namespace, page_title,
 567                                 page_restrictions, page_counter, page_is_redirect, page_is_new, page_random,
 568                                 page_touched, page_latest, page_len)
 569                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions, cur_counter,
 570                                 cur_is_redirect, cur_is_new, cur_random, cur_touched, rev_id, LENGTH(cur_text)
 571                         FROM $cur,$revision
 572                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}",
 573                         __METHOD__
 574                 );
 575
 576                 $this->output( wfTimestamp( TS_DB ) );
 577                 $this->output( "......Unlocking tables.\n" );
 578                 $this->db->query( "UNLOCK TABLES", __METHOD__ );
 579
 580                 $this->output( wfTimestamp( TS_DB ) );
 581                 $this->output( "......Renaming old.\n" );
 582                 $this->db->query( "ALTER TABLE $old RENAME TO $text", __METHOD__ );
 583
 584                 $this->output( wfTimestamp( TS_DB ) );
 585                 $this->output( "...done.\n" );
 586         }
 587
 588         protected function doNamespaceSize() {
 589                 $tables = array(
 590                         'page' => 'page',
 591                         'archive' => 'ar',
 592                         'recentchanges' => 'rc',
 593                         'watchlist' => 'wl',
 594                         'querycache' => 'qc',
 595                         'logging' => 'log',
 596                 );
 597                 foreach ( $tables as $table => $prefix ) {
 598                         $field = $prefix . '_namespace';
 599
 600                         $tablename = $this->db->tableName( $table );
 601                         $result = $this->db->query( "SHOW COLUMNS FROM $tablename LIKE '$field'", __METHOD__ );
 602                         $info = $this->db->fetchObject( $result );
 603
 604                         if ( substr( $info->Type, 0, 3 ) == 'int' ) {
 605                                 $this->output( "...$field is already a full int ($info->Type).\n" );
 606                         } else {
 607                                 $this->output( "Promoting $field from $info->Type to int... " );
 608                                 $this->db->query( "ALTER TABLE $tablename MODIFY $field int NOT NULL", __METHOD__ );
 609                                 $this->output( "done.\n" );
 610                         }
 611                 }
 612         }
 613
 614         protected function doPagelinksUpdate() {
 615                 if ( $this->db->tableExists( 'pagelinks', __METHOD__ ) ) {
 616                         $this->output( "...already have pagelinks table.\n" );
 617
 618                         return;
 619                 }
 620
 621                 $this->applyPatch(
 622                         'patch-pagelinks.sql',
 623                         false,
 624                         'Converting links and brokenlinks tables to pagelinks'
 625                 );
 626
 627                 global $wgContLang;
 628                 foreach ( MWNamespace::getCanonicalNamespaces() as $ns => $name ) {
 629                         if ( $ns == 0 ) {
 630                                 continue;
 631                         }
 632
 633                         $this->output( "Cleaning up broken links for namespace $ns... " );
 634
 635                         $pagelinks = $this->db->tableName( 'pagelinks' );
 636                         $name = $wgContLang->getNsText( $ns );
 637                         $prefix = $this->db->strencode( $name );
 638                         $likeprefix = str_replace( '_', '\\_', $prefix );
 639
 640                         $sql = "UPDATE $pagelinks
 641                                            SET pl_namespace=$ns,
 642                                                    pl_title=TRIM(LEADING '$prefix:' FROM pl_title)
 643                                          WHERE pl_namespace=0
 644                                            AND pl_title LIKE '$likeprefix:%'";
 645
 646                         $this->db->query( $sql, __METHOD__ );
 647                         $this->output( "done.\n" );
 648                 }
 649         }
 650
 651         protected function doUserUniqueUpdate() {
 652                 if ( !$this->doTable( 'user' ) ) {
 653                         return true;
 654                 }
 655
 656                 $duper = new UserDupes( $this->db, array( $this, 'output' ) );
 657                 if ( $duper->hasUniqueIndex() ) {
 658                         $this->output( "...already have unique user_name index.\n" );
 659
 660                         return;
 661                 }
 662
 663                 if ( !$duper->clearDupes() ) {
 664                         $this->output( "WARNING: This next step will probably fail due to unfixed duplicates...\n" );
 665                 }
 666                 $this->applyPatch( 'patch-user_nameindex.sql', false, "Adding unique index on user_name" );
 667         }
 668
 669         protected function doUserGroupsUpdate() {
 670                 if ( !$this->doTable( 'user_groups' ) ) {
 671                         return true;
 672                 }
 673
 674                 if ( $this->db->tableExists( 'user_groups', __METHOD__ ) ) {
 675                         $info = $this->db->fieldInfo( 'user_groups', 'ug_group' );
 676                         if ( $info->type() == 'int' ) {
 677                                 $oldug = $this->db->tableName( 'user_groups' );
 678                                 $newug = $this->db->tableName( 'user_groups_bogus' );
 679                                 $this->output( "user_groups table exists but is in bogus intermediate " .
 680                                         "format. Renaming to $newug... " );
 681                                 $this->db->query( "ALTER TABLE $oldug RENAME TO $newug", __METHOD__ );
 682                                 $this->output( "done.\n" );
 683
 684                                 $this->applyPatch( 'patch-user_groups.sql', false, "Re-adding fresh user_groups table" );
 685
 686                                 $this->output( "***\n" );
 687                                 $this->output( "*** WARNING: You will need to manually fix up user " .
 688                                         "permissions in the user_groups\n" );
 689                                 $this->output( "*** table. Old 1.5 alpha versions did some pretty funky stuff...\n" );
 690                                 $this->output( "***\n" );
 691                         } else {
 692                                 $this->output( "...user_groups table exists and is in current format.\n" );
 693                         }
 694
 695                         return;
 696                 }
 697
 698                 $this->applyPatch( 'patch-user_groups.sql', false, "Adding user_groups table" );
 699
 700                 if ( !$this->db->tableExists( 'user_rights', __METHOD__ ) ) {
 701                         if ( $this->db->fieldExists( 'user', 'user_rights', __METHOD__ ) ) {
 702                                 $this->db->applyPatch(
 703                                         'patch-user_rights.sql',
 704                                         false,
 705                                         'Upgrading from a 1.3 or older database? Breaking out user_rights for conversion'
 706                                 );
 707                         } else {
 708                                 $this->output( "*** WARNING: couldn't locate user_rights table or field for upgrade.\n" );
 709                                 $this->output( "*** You may need to manually configure some sysops by manipulating\n" );
 710                                 $this->output( "*** the user_groups table.\n" );
 711
 712                                 return;
 713                         }
 714                 }
 715
 716                 $this->output( "Converting user_rights table to user_groups... " );
 717                 $result = $this->db->select( 'user_rights',
 718                         array( 'ur_user', 'ur_rights' ),
 719                         array( "ur_rights != ''" ),
 720                         __METHOD__ );
 721
 722                 foreach ( $result as $row ) {
 723                         $groups = array_unique(
 724                                 array_map( 'trim',
 725                                         explode( ',', $row->ur_rights ) ) );
 726
 727                         foreach ( $groups as $group ) {
 728                                 $this->db->insert( 'user_groups',
 729                                         array(
 730                                                 'ug_user' => $row->ur_user,
 731                                                 'ug_group' => $group ),
 732                                         __METHOD__ );
 733                         }
 734                 }
 735                 $this->output( "done.\n" );
 736         }
 737
 738         /**
 739          * Make sure wl_notificationtimestamp can be NULL,
 740          * and update old broken items.
 741          */
 742         protected function doWatchlistNull() {
 743                 $info = $this->db->fieldInfo( 'watchlist', 'wl_notificationtimestamp' );
 744                 if ( !$info ) {
 745                         return;
 746                 }
 747                 if ( $info->isNullable() ) {
 748                         $this->output( "...wl_notificationtimestamp is already nullable.\n" );
 749
 750                         return;
 751                 }
 752
 753                 $this->applyPatch(
 754                         'patch-watchlist-null.sql',
 755                         false,
 756                         'Making wl_notificationtimestamp nullable'
 757                 );
 758         }
 759
 760         /**
 761          * Set page_random field to a random value where it is equals to 0.
 762          *
 763          * @see bug 3946
 764          */
 765         protected function doPageRandomUpdate() {
 766                 $page = $this->db->tableName( 'page' );
 767                 $this->db->query( "UPDATE $page SET page_random = RAND() WHERE page_random = 0", __METHOD__ );
 768                 $rows = $this->db->affectedRows();
 769
 770                 if ( $rows ) {
 771                         $this->output( "Set page_random to a random value on $rows rows where it was set to 0\n" );
 772                 } else {
 773                         $this->output( "...no page_random rows needed to be set\n" );
 774                 }
 775         }
 776
 777         protected function doTemplatelinksUpdate() {
 778                 if ( $this->db->tableExists( 'templatelinks', __METHOD__ ) ) {
 779                         $this->output( "...templatelinks table already exists\n" );
 780
 781                         return;
 782                 }
 783
 784                 $this->applyPatch( 'patch-templatelinks.sql', false, "Creating templatelinks table" );
 785
 786                 $this->output( "Populating...\n" );
 787                 if ( wfGetLB()->getServerCount() > 1 ) {
 788                         // Slow, replication-friendly update
 789                         $res = $this->db->select( 'pagelinks', array( 'pl_from', 'pl_namespace', 'pl_title' ),
 790                                 array( 'pl_namespace' => NS_TEMPLATE ), __METHOD__ );
 791                         $count = 0;
 792                         foreach ( $res as $row ) {
 793                                 $count = ( $count + 1 ) % 100;
 794                                 if ( $count == 0 ) {
 795                                         wfWaitForSlaves();
 796                                 }
 797                                 $this->db->insert( 'templatelinks',
 798                                         array(
 799                                                 'tl_from' => $row->pl_from,
 800                                                 'tl_namespace' => $row->pl_namespace,
 801                                                 'tl_title' => $row->pl_title,
 802                                         ), __METHOD__
 803                                 );
 804                         }
 805                 } else {
 806                         // Fast update
 807                         $this->db->insertSelect( 'templatelinks', 'pagelinks',
 808                                 array(
 809                                         'tl_from' => 'pl_from',
 810                                         'tl_namespace' => 'pl_namespace',
 811                                         'tl_title' => 'pl_title'
 812                                 ), array(
 813                                         'pl_namespace' => 10
 814                                 ), __METHOD__
 815                         );
 816                 }
 817                 $this->output( "Done. Please run maintenance/refreshLinks.php for a more " .
 818                         "thorough templatelinks update.\n" );
 819         }
 820
 821         protected function doBacklinkingIndicesUpdate() {
 822                 if ( !$this->indexHasField( 'pagelinks', 'pl_namespace', 'pl_from' ) ||
 823                         !$this->indexHasField( 'templatelinks', 'tl_namespace', 'tl_from' ) ||
 824                         !$this->indexHasField( 'imagelinks', 'il_to', 'il_from' )
 825                 ) {
 826                         $this->applyPatch( 'patch-backlinkindexes.sql', false, "Updating backlinking indices" );
 827                 }
 828         }
 829
 830         /**
 831          * Adding page_restrictions table, obsoleting page.page_restrictions.
 832          * Migrating old restrictions to new table
 833          * -- Andrew Garrett, January 2007.
 834          */
 835         protected function doRestrictionsUpdate() {
 836                 if ( $this->db->tableExists( 'page_restrictions', __METHOD__ ) ) {
 837                         $this->output( "...page_restrictions table already exists.\n" );
 838
 839                         return;
 840                 }
 841
 842                 $this->applyPatch(
 843                         'patch-page_restrictions.sql',
 844                         false,
 845                         'Creating page_restrictions table (1/2)'
 846                 );
 847                 $this->applyPatch(
 848                         'patch-page_restrictions_sortkey.sql',
 849                         false,
 850                         'Creating page_restrictions table (2/2)'
 851                 );
 852                 $this->output( "done.\n" );
 853
 854                 $this->output( "Migrating old restrictions to new table...\n" );
 855                 $task = $this->maintenance->runChild( 'UpdateRestrictions' );
 856                 $task->execute();
 857         }
 858
 859         protected function doCategorylinksIndicesUpdate() {
 860                 if ( !$this->indexHasField( 'categorylinks', 'cl_sortkey', 'cl_from' ) ) {
 861                         $this->applyPatch( 'patch-categorylinksindex.sql', false, "Updating categorylinks Indices" );
 862                 }
 863         }
 864
 865         protected function doCategoryPopulation() {
 866                 if ( $this->updateRowExists( 'populate category' ) ) {
 867                         $this->output( "...category table already populated.\n" );
 868
 869                         return;
 870                 }
 871
 872                 $this->output(
 873                         "Populating category table, printing progress markers. " .
 874                         "For large databases, you\n" .
 875                         "may want to hit Ctrl-C and do this manually with maintenance/\n" .
 876                         "populateCategory.php.\n"
 877                 );
 878                 $task = $this->maintenance->runChild( 'PopulateCategory' );
 879                 $task->execute();
 880                 $this->output( "Done populating category table.\n" );
 881         }
 882
 883         protected function doPopulateParentId() {
 884                 if ( !$this->updateRowExists( 'populate rev_parent_id' ) ) {
 885                         $this->output(
 886                                 "Populating rev_parent_id fields, printing progress markers. For large\n" .
 887                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 888                                 "maintenance/populateParentId.php.\n" );
 889
 890                         $task = $this->maintenance->runChild( 'PopulateParentId' );
 891                         $task->execute();
 892                 }
 893         }
 894
 895         protected function doEnableProfiling() {
 896                 global $wgProfileToDatabase;
 897
 898                 if ( !$this->doTable( 'profiling' ) ) {
 899                         return true;
 900                 }
 901
 902                 if ( $wgProfileToDatabase === true && !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 903                         $this->applyPatch( 'patch-profiling.sql', false, 'Add profiling table' );
 904                 }
 905         }
 906
 907         protected function doMaybeProfilingMemoryUpdate() {
 908                 if ( !$this->doTable( 'profiling' ) ) {
 909                         return true;
 910                 }
 911
 912                 if ( !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 913                         return true;
 914                 } elseif ( $this->db->fieldExists( 'profiling', 'pf_memory', __METHOD__ ) ) {
 915                         $this->output( "...profiling table has pf_memory field.\n" );
 916
 917                         return true;
 918                 }
 919
 920                 return $this->applyPatch(
 921                         'patch-profiling-memory.sql',
 922                         false,
 923                         'Adding pf_memory field to table profiling'
 924                 );
 925         }
 926
 927         protected function doFilearchiveIndicesUpdate() {
 928                 $info = $this->db->indexInfo( 'filearchive', 'fa_user_timestamp', __METHOD__ );
 929                 if ( !$info ) {
 930                         $this->applyPatch( 'patch-filearchive-user-index.sql', false, "Updating filearchive indices" );
 931                 }
 932
 933                 return true;
 934         }
 935
 936         protected function doUniquePlTlIl() {
 937                 $info = $this->db->indexInfo( 'pagelinks', 'pl_namespace' );
 938                 if ( is_array( $info ) && !$info[0]->Non_unique ) {
 939                         $this->output( "...pl_namespace, tl_namespace, il_to indices are already UNIQUE.\n" );
 940
 941                         return true;
 942                 }
 943                 if ( $this->skipSchema ) {
 944                         $this->output( "...skipping schema change (making pl_namespace, tl_namespace " .
 945                                 "and il_to indices UNIQUE).\n" );
 946
 947                         return false;
 948                 }
 949
 950                 return $this->applyPatch(
 951                         'patch-pl-tl-il-unique.sql',
 952                         false,
 953                         'Making pl_namespace, tl_namespace and il_to indices UNIQUE'
 954                 );
 955         }
 956
 957         protected function doUpdateMimeMinorField() {
 958                 if ( $this->updateRowExists( 'mime_minor_length' ) ) {
 959                         $this->output( "...*_mime_minor fields are already long enough.\n" );
 960
 961                         return;
 962                 }
 963
 964                 $this->applyPatch(
 965                         'patch-mime_minor_length.sql',
 966                         false,
 967                         'Altering all *_mime_minor fields to 100 bytes in size'
 968                 );
 969         }
 970
 971         protected function doClFieldsUpdate() {
 972                 if ( $this->updateRowExists( 'cl_fields_update' ) ) {
 973                         $this->output( "...categorylinks up-to-date.\n" );
 974
 975                         return;
 976                 }
 977
 978                 $this->applyPatch(
 979                         'patch-categorylinks-better-collation2.sql',
 980                         false,
 981                         'Updating categorylinks (again)'
 982                 );
 983         }
 984
 985         protected function doLangLinksLengthUpdate() {
 986                 $langlinks = $this->db->tableName( 'langlinks' );
 987                 $res = $this->db->query( "SHOW COLUMNS FROM $langlinks LIKE 'll_lang'" );
 988                 $row = $this->db->fetchObject( $res );
 989
 990                 if ( $row && $row->Type == "varbinary(10)" ) {
 991                         $this->applyPatch(
 992                                 'patch-langlinks-ll_lang-20.sql',
 993                                 false,
 994                                 'Updating length of ll_lang in langlinks'
 995                         );
 996                 } else {
 997                         $this->output( "...ll_lang is up-to-date.\n" );
 998                 }
 999         }
1000
1001         protected function doUserNewTalkTimestampNotNull() {
1002                 if ( !$this->doTable( 'user_newtalk' ) ) {
1003                         return true;
1004                 }
1005
1006                 $info = $this->db->fieldInfo( 'user_newtalk', 'user_last_timestamp' );
1007                 if ( $info === false ) {
1008                         return;
1009                 }
1010                 if ( $info->isNullable() ) {
1011                         $this->output( "...user_last_timestamp is already nullable.\n" );
1012
1013                         return;
1014                 }
1015
1016                 $this->applyPatch(
1017                         'patch-user-newtalk-timestamp-null.sql',
1018                         false,
1019                         'Making user_last_timestamp nullable'
1020                 );
1021         }
1022
1023         protected function doIwlinksIndexNonUnique() {
1024                 $info = $this->db->indexInfo( 'iwlinks', 'iwl_prefix_title_from' );
1025                 if ( is_array( $info ) && $info[0]->Non_unique ) {
1026                         $this->output( "...iwl_prefix_title_from index is already non-UNIQUE.\n" );
1027
1028                         return true;
1029                 }
1030                 if ( $this->skipSchema ) {
1031                         $this->output( "...skipping schema change (making iwl_prefix_title_from index non-UNIQUE).\n" );
1032
1033                         return false;
1034                 }
1035
1036                 return $this->applyPatch(
1037                         'patch-iwl_prefix_title_from-non-unique.sql',
1038                         false,
1039                         'Making iwl_prefix_title_from index non-UNIQUE'
1040                 );
1041         }
1042 }