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                         array( 'addIndex', 'recentchanges', 'new_name_timestamp', 'patch-rc-newindex.sql' ),
  44
  45                         // 1.3
  46                         array( 'addField', 'user', 'user_real_name', 'patch-user-realname.sql' ),
  47                         array( 'addTable', 'querycache', 'patch-querycache.sql' ),
  48                         array( 'addTable', 'objectcache', 'patch-objectcache.sql' ),
  49                         array( 'addTable', 'categorylinks', 'patch-categorylinks.sql' ),
  50                         array( 'doOldLinksUpdate' ),
  51                         array( 'doFixAncientImagelinks' ),
  52                         array( 'addField', 'recentchanges', 'rc_ip', 'patch-rc_ip.sql' ),
  53
  54                         // 1.4
  55                         array( 'addIndex', 'image', 'PRIMARY', 'patch-image_name_primary.sql' ),
  56                         array( 'addField', 'recentchanges', 'rc_id', 'patch-rc_id.sql' ),
  57                         array( 'addField', 'recentchanges', 'rc_patrolled', 'patch-rc-patrol.sql' ),
  58                         array( 'addTable', 'logging', 'patch-logging.sql' ),
  59                         array( 'addField', 'user', 'user_token', 'patch-user_token.sql' ),
  60                         array( 'addField', 'watchlist', 'wl_notificationtimestamp', 'patch-email-notification.sql' ),
  61                         array( 'doWatchlistUpdate' ),
  62                         array( 'dropField', 'user', 'user_emailauthenticationtimestamp',
  63                                 'patch-email-authentication.sql' ),
  64
  65                         // 1.5
  66                         array( 'doSchemaRestructuring' ),
  67                         array( 'addField', 'logging', 'log_params', 'patch-log_params.sql' ),
  68                         array( 'checkBin', 'logging', 'log_title', 'patch-logging-title.sql', ),
  69                         array( 'addField', 'archive', 'ar_rev_id', 'patch-archive-rev_id.sql' ),
  70                         array( 'addField', 'page', 'page_len', 'patch-page_len.sql' ),
  71                         array( 'dropField', 'revision', 'inverse_timestamp', 'patch-inverse_timestamp.sql' ),
  72                         array( 'addField', 'revision', 'rev_text_id', 'patch-rev_text_id.sql' ),
  73                         array( 'addField', 'revision', 'rev_deleted', 'patch-rev_deleted.sql' ),
  74                         array( 'addField', 'image', 'img_width', 'patch-img_width.sql' ),
  75                         array( 'addField', 'image', 'img_metadata', 'patch-img_metadata.sql' ),
  76                         array( 'addField', 'user', 'user_email_token', 'patch-user_email_token.sql' ),
  77                         array( 'addField', 'archive', 'ar_text_id', 'patch-archive-text_id.sql' ),
  78                         array( 'doNamespaceSize' ),
  79                         array( 'addField', 'image', 'img_media_type', 'patch-img_media_type.sql' ),
  80                         array( 'doPagelinksUpdate' ),
  81                         array( 'dropField', 'image', 'img_type', 'patch-drop_img_type.sql' ),
  82                         array( 'doUserUniqueUpdate' ),
  83                         array( 'doUserGroupsUpdate' ),
  84                         array( 'addField', 'site_stats', 'ss_total_pages', 'patch-ss_total_articles.sql' ),
  85                         array( 'addTable', 'user_newtalk', 'patch-usernewtalk2.sql' ),
  86                         array( 'addTable', 'transcache', 'patch-transcache.sql' ),
  87                         array( 'addField', 'interwiki', 'iw_trans', 'patch-interwiki-trans.sql' ),
  88
  89                         // 1.6
  90                         array( 'doWatchlistNull' ),
  91                         array( 'addIndex', 'logging', 'times', 'patch-logging-times-index.sql' ),
  92                         array( 'addField', 'ipblocks', 'ipb_range_start', 'patch-ipb_range_start.sql' ),
  93                         array( 'doPageRandomUpdate' ),
  94                         array( 'addField', 'user', 'user_registration', 'patch-user_registration.sql' ),
  95                         array( 'doTemplatelinksUpdate' ),
  96                         array( 'addTable', 'externallinks', 'patch-externallinks.sql' ),
  97                         array( 'addTable', 'job', 'patch-job.sql' ),
  98                         array( 'addField', 'site_stats', 'ss_images', 'patch-ss_images.sql' ),
  99                         array( 'addTable', 'langlinks', 'patch-langlinks.sql' ),
 100                         array( 'addTable', 'querycache_info', 'patch-querycacheinfo.sql' ),
 101                         array( 'addTable', 'filearchive', 'patch-filearchive.sql' ),
 102                         array( 'addField', 'ipblocks', 'ipb_anon_only', 'patch-ipb_anon_only.sql' ),
 103                         array( 'addIndex', 'recentchanges', 'rc_ns_usertext', 'patch-recentchanges-utindex.sql' ),
 104                         array( 'addIndex', 'recentchanges', 'rc_user_text', 'patch-rc_user_text-index.sql' ),
 105
 106                         // 1.9
 107                         array( 'addField', 'user', 'user_newpass_time', 'patch-user_newpass_time.sql' ),
 108                         array( 'addTable', 'redirect', 'patch-redirect.sql' ),
 109                         array( 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ),
 110                         array( 'addField', 'ipblocks', 'ipb_enable_autoblock', 'patch-ipb_optional_autoblock.sql' ),
 111                         array( 'doBacklinkingIndicesUpdate' ),
 112                         array( 'addField', 'recentchanges', 'rc_old_len', 'patch-rc_len.sql' ),
 113                         array( 'addField', 'user', 'user_editcount', 'patch-user_editcount.sql' ),
 114
 115                         // 1.10
 116                         array( 'doRestrictionsUpdate' ),
 117                         array( 'addField', 'logging', 'log_id', 'patch-log_id.sql' ),
 118                         array( 'addField', 'revision', 'rev_parent_id', 'patch-rev_parent_id.sql' ),
 119                         array( 'addField', 'page_restrictions', 'pr_id', 'patch-page_restrictions_sortkey.sql' ),
 120                         array( 'addField', 'revision', 'rev_len', 'patch-rev_len.sql' ),
 121                         array( 'addField', 'recentchanges', 'rc_deleted', 'patch-rc_deleted.sql' ),
 122                         array( 'addField', 'logging', 'log_deleted', 'patch-log_deleted.sql' ),
 123                         array( 'addField', 'archive', 'ar_deleted', 'patch-ar_deleted.sql' ),
 124                         array( 'addField', 'ipblocks', 'ipb_deleted', 'patch-ipb_deleted.sql' ),
 125                         array( 'addField', 'filearchive', 'fa_deleted', 'patch-fa_deleted.sql' ),
 126                         array( 'addField', 'archive', 'ar_len', 'patch-ar_len.sql' ),
 127
 128                         // 1.11
 129                         array( 'addField', 'ipblocks', 'ipb_block_email', 'patch-ipb_emailban.sql' ),
 130                         array( 'doCategorylinksIndicesUpdate' ),
 131                         array( 'addField', 'oldimage', 'oi_metadata', 'patch-oi_metadata.sql' ),
 132                         array( 'addIndex', 'archive', 'usertext_timestamp', 'patch-archive-user-index.sql' ),
 133                         array( 'addIndex', 'image', 'img_usertext_timestamp', 'patch-image-user-index.sql' ),
 134                         array( 'addIndex', 'oldimage', 'oi_usertext_timestamp', 'patch-oldimage-user-index.sql' ),
 135                         array( 'addField', 'archive', 'ar_page_id', 'patch-archive-page_id.sql' ),
 136                         array( 'addField', 'image', 'img_sha1', 'patch-img_sha1.sql' ),
 137
 138                         // 1.12
 139                         array( 'addTable', 'protected_titles', 'patch-protected_titles.sql' ),
 140
 141                         // 1.13
 142                         array( 'addField', 'ipblocks', 'ipb_by_text', 'patch-ipb_by_text.sql' ),
 143                         array( 'addTable', 'page_props', 'patch-page_props.sql' ),
 144                         array( 'addTable', 'updatelog', 'patch-updatelog.sql' ),
 145                         array( 'addTable', 'category', 'patch-category.sql' ),
 146                         array( 'doCategoryPopulation' ),
 147                         array( 'addField', 'archive', 'ar_parent_id', 'patch-ar_parent_id.sql' ),
 148                         array( 'addField', 'user_newtalk', 'user_last_timestamp', 'patch-user_last_timestamp.sql' ),
 149                         array( 'doPopulateParentId' ),
 150                         array( 'checkBin', 'protected_titles', 'pt_title', 'patch-pt_title-encoding.sql', ),
 151                         array( 'doMaybeProfilingMemoryUpdate' ),
 152                         array( 'doFilearchiveIndicesUpdate' ),
 153
 154                         // 1.14
 155                         array( 'addField', 'site_stats', 'ss_active_users', 'patch-ss_active_users.sql' ),
 156                         array( 'doActiveUsersInit' ),
 157                         array( 'addField', 'ipblocks', 'ipb_allow_usertalk', 'patch-ipb_allow_usertalk.sql' ),
 158
 159                         // 1.15
 160                         array( 'doUniquePlTlIl' ),
 161                         array( 'addTable', 'change_tag', 'patch-change_tag.sql' ),
 162                         array( 'addTable', 'tag_summary', 'patch-tag_summary.sql' ),
 163                         array( 'addTable', 'valid_tag', 'patch-valid_tag.sql' ),
 164
 165                         // 1.16
 166                         array( 'addTable', 'user_properties', 'patch-user_properties.sql' ),
 167                         array( 'addTable', 'log_search', 'patch-log_search.sql' ),
 168                         array( 'addField', 'logging', 'log_user_text', 'patch-log_user_text.sql' ),
 169                         # listed separately from the previous update because 1.16 was released without this update
 170                         array( 'doLogUsertextPopulation' ),
 171                         array( 'doLogSearchPopulation' ),
 172                         array( 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ),
 173                         array( 'addIndex', 'log_search', 'ls_field_val', 'patch-log_search-rename-index.sql' ),
 174                         array( 'addIndex', 'change_tag', 'change_tag_rc_tag', 'patch-change_tag-indexes.sql' ),
 175                         array( 'addField', 'redirect', 'rd_interwiki', 'patch-rd_interwiki.sql' ),
 176                         array( 'doUpdateTranscacheField' ),
 177                         array( 'doUpdateMimeMinorField' ),
 178
 179                         // 1.17
 180                         array( 'addTable', 'iwlinks', 'patch-iwlinks.sql' ),
 181                         array( 'addIndex', 'iwlinks', 'iwl_prefix_title_from', 'patch-rename-iwl_prefix.sql' ),
 182                         array( 'addField', 'updatelog', 'ul_value', 'patch-ul_value.sql' ),
 183                         array( 'addField', 'interwiki', 'iw_api', 'patch-iw_api_and_wikiid.sql' ),
 184                         array( 'dropIndex', 'iwlinks', 'iwl_prefix', 'patch-kill-iwl_prefix.sql' ),
 185                         array( 'addField', 'categorylinks', 'cl_collation', 'patch-categorylinks-better-collation.sql' ),
 186                         array( 'doClFieldsUpdate' ),
 187                         array( 'doCollationUpdate' ),
 188                         array( 'addTable', 'msg_resource', 'patch-msg_resource.sql' ),
 189                         array( 'addTable', 'module_deps', 'patch-module_deps.sql' ),
 190                         array( 'dropIndex', 'archive', 'ar_page_revid', 'patch-archive_kill_ar_page_revid.sql' ),
 191                         array( 'addIndex', 'archive', 'ar_revid', 'patch-archive_ar_revid.sql' ),
 192                         array( 'doLangLinksLengthUpdate' ),
 193
 194                         // 1.18
 195                         array( 'doUserNewTalkTimestampNotNull' ),
 196                         array( 'addIndex', 'user', 'user_email', 'patch-user_email_index.sql' ),
 197                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
 198                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
 199                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
 200
 201                         // 1.19
 202                         array( 'addIndex', 'logging', 'type_action', 'patch-logging-type-action-index.sql' ),
 203                         array( 'addField', 'revision', 'rev_sha1', 'patch-rev_sha1.sql' ),
 204                         array( 'doMigrateUserOptions' ),
 205                         array( 'dropField', 'user', 'user_options', 'patch-drop-user_options.sql' ),
 206                         array( 'addField', 'archive', 'ar_sha1', 'patch-ar_sha1.sql' ),
 207                         array( 'addIndex', 'page', 'page_redirect_namespace_len',
 208                                 'patch-page_redirect_namespace_len.sql' ),
 209                         array( 'addField', 'uploadstash', 'us_chunk_inx', 'patch-uploadstash_chunk.sql' ),
 210                         array( 'addfield', 'job', 'job_timestamp', 'patch-jobs-add-timestamp.sql' ),
 211
 212                         // 1.20
 213                         array( 'addIndex', 'revision', 'page_user_timestamp', 'patch-revision-user-page-index.sql' ),
 214                         array( 'addField', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id.sql' ),
 215                         array( 'addIndex', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id-index.sql' ),
 216                         array( 'dropField', 'category', 'cat_hidden', 'patch-cat_hidden.sql' ),
 217
 218                         // 1.21
 219                         array( 'addField', 'revision', 'rev_content_format', 'patch-revision-rev_content_format.sql' ),
 220                         array( 'addField', 'revision', 'rev_content_model', 'patch-revision-rev_content_model.sql' ),
 221                         array( 'addField', 'archive', 'ar_content_format', 'patch-archive-ar_content_format.sql' ),
 222                         array( 'addField', 'archive', 'ar_content_model', 'patch-archive-ar_content_model.sql' ),
 223                         array( 'addField', 'page', 'page_content_model', 'patch-page-page_content_model.sql' ),
 224                         array( 'enableContentHandlerUseDB' ),
 225                         array( 'dropField', 'site_stats', 'ss_admins', 'patch-drop-ss_admins.sql' ),
 226                         array( 'dropField', 'recentchanges', 'rc_moved_to_title', 'patch-rc_moved.sql' ),
 227                         array( 'addTable', 'sites', 'patch-sites.sql' ),
 228                         array( 'addField', 'filearchive', 'fa_sha1', 'patch-fa_sha1.sql' ),
 229                         array( 'addField', 'job', 'job_token', 'patch-job_token.sql' ),
 230                         array( 'addField', 'job', 'job_attempts', 'patch-job_attempts.sql' ),
 231                         array( 'doEnableProfiling' ),
 232                         array( 'addField', 'uploadstash', 'us_props', 'patch-uploadstash-us_props.sql' ),
 233                         array( 'modifyField', 'user_groups', 'ug_group', 'patch-ug_group-length-increase-255.sql' ),
 234                         array( 'modifyField', 'user_former_groups', 'ufg_group',
 235                                 'patch-ufg_group-length-increase-255.sql' ),
 236                         array( 'addIndex', 'page_props', 'pp_propname_page',
 237                                 'patch-page_props-propname-page-index.sql' ),
 238                         array( 'addIndex', 'image', 'img_media_mime', 'patch-img_media_mime-index.sql' ),
 239
 240                         // 1.22
 241                         array( 'doIwlinksIndexNonUnique' ),
 242                         array( 'addIndex', 'iwlinks', 'iwl_prefix_from_title',
 243                                 'patch-iwlinks-from-title-index.sql' ),
 244                         array( 'addField', 'archive', 'ar_id', 'patch-archive-ar_id.sql' ),
 245                         array( 'addField', 'externallinks', 'el_id', 'patch-externallinks-el_id.sql' ),
 246
 247                         // 1.23
 248                         array( 'addField', 'recentchanges', 'rc_source', 'patch-rc_source.sql' ),
 249                 );
 250         }
 251
 252         /**
 253          * 1.4 betas were missing the 'binary' marker from logging.log_title,
 254          * which causes a collation mismatch error on joins in MySQL 4.1.
 255          *
 256          * @param string $table Table name
 257          * @param string $field Field name to check
 258          * @param string $patchFile Path to the patch to correct the field
 259          * @return bool
 260          */
 261         protected function checkBin( $table, $field, $patchFile ) {
 262                 if ( !$this->doTable( $table ) ) {
 263                         return true;
 264                 }
 265
 266                 /** @var MySQLField $fieldInfo */
 267                 $fieldInfo = $this->db->fieldInfo( $table, $field );
 268                 if ( $fieldInfo->isBinary() ) {
 269                         $this->output( "...$table table has correct $field encoding.\n" );
 270                 } else {
 271                         $this->applyPatch( $patchFile, false, "Fixing $field encoding on $table table" );
 272                 }
 273         }
 274
 275         /**
 276          * Check whether an index contain a field
 277          *
 278          * @param string $table Table name
 279          * @param string $index Index name to check
 280          * @param string $field Field that should be in the index
 281          * @return bool
 282          */
 283         protected function indexHasField( $table, $index, $field ) {
 284                 if ( !$this->doTable( $table ) ) {
 285                         return true;
 286                 }
 287
 288                 $info = $this->db->indexInfo( $table, $index, __METHOD__ );
 289                 if ( $info ) {
 290                         foreach ( $info as $row ) {
 291                                 if ( $row->Column_name == $field ) {
 292                                         $this->output( "...index $index on table $table includes field $field.\n" );
 293
 294                                         return true;
 295                                 }
 296                         }
 297                 }
 298                 $this->output( "...index $index on table $table has no field $field; added.\n" );
 299
 300                 return false;
 301         }
 302
 303         /**
 304          * Check that interwiki table exists; if it doesn't source it
 305          */
 306         protected function doInterwikiUpdate() {
 307                 global $IP;
 308
 309                 if ( !$this->doTable( 'interwiki' ) ) {
 310                         return true;
 311                 }
 312
 313                 if ( $this->db->tableExists( "interwiki", __METHOD__ ) ) {
 314                         $this->output( "...already have interwiki table\n" );
 315
 316                         return;
 317                 }
 318
 319                 $this->applyPatch( 'patch-interwiki.sql', false, 'Creating interwiki table' );
 320                 $this->applyPatch(
 321                         "$IP/maintenance/interwiki.sql",
 322                         true,
 323                         'Adding default interwiki definitions'
 324                 );
 325         }
 326
 327         /**
 328          * Check that proper indexes are in place
 329          */
 330         protected function doIndexUpdate() {
 331                 $meta = $this->db->fieldInfo( 'recentchanges', 'rc_timestamp' );
 332                 if ( $meta === false ) {
 333                         throw new MWException( 'Missing rc_timestamp field of recentchanges table. Should not happen.' );
 334                 }
 335                 if ( $meta->isMultipleKey() ) {
 336                         $this->output( "...indexes seem up to 20031107 standards.\n" );
 337
 338                         return;
 339                 }
 340
 341                 $this->applyPatch( 'patch-indexes.sql', true, "Updating indexes to 20031107" );
 342         }
 343
 344         protected function doOldLinksUpdate() {
 345                 $cl = $this->maintenance->runChild( 'ConvertLinks' );
 346                 $cl->execute();
 347         }
 348
 349         protected function doFixAncientImagelinks() {
 350                 $info = $this->db->fieldInfo( 'imagelinks', 'il_from' );
 351                 if ( !$info || $info->type() !== 'string' ) {
 352                         $this->output( "...il_from OK\n" );
 353
 354                         return;
 355                 }
 356
 357                 $applied = $this->applyPatch(
 358                         'patch-fix-il_from.sql',
 359                         false,
 360                         'Fixing ancient broken imagelinks table.'
 361                 );
 362
 363                 if ( $applied ) {
 364                         $this->output( "NOTE: you will have to run maintenance/refreshLinks.php after this." );
 365                 }
 366         }
 367
 368         /**
 369          * Check if we need to add talk page rows to the watchlist
 370          */
 371         function doWatchlistUpdate() {
 372                 $talk = $this->db->selectField( 'watchlist', 'count(*)', 'wl_namespace & 1', __METHOD__ );
 373                 $nontalk = $this->db->selectField(
 374                         'watchlist',
 375                         'count(*)',
 376                         'NOT (wl_namespace & 1)',
 377                         __METHOD__
 378                 );
 379                 if ( $talk == $nontalk ) {
 380                         $this->output( "...watchlist talk page rows already present.\n" );
 381
 382                         return;
 383                 }
 384
 385                 $this->output( "Adding missing watchlist talk page rows... " );
 386                 $this->db->insertSelect( 'watchlist', 'watchlist',
 387                         array(
 388                                 'wl_user' => 'wl_user',
 389                                 'wl_namespace' => 'wl_namespace | 1',
 390                                 'wl_title' => 'wl_title',
 391                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 392                         ), array( 'NOT (wl_namespace & 1)' ), __METHOD__, 'IGNORE' );
 393                 $this->output( "done.\n" );
 394         }
 395
 396         function doSchemaRestructuring() {
 397                 if ( $this->db->tableExists( 'page', __METHOD__ ) ) {
 398                         $this->output( "...page table already exists.\n" );
 399
 400                         return;
 401                 }
 402
 403                 $this->output( "...converting from cur/old to page/revision/text DB structure.\n" );
 404                 $this->output( wfTimestamp( TS_DB ) );
 405                 $this->output( "......checking for duplicate entries.\n" );
 406
 407                 list( $cur, $old, $page, $revision, $text ) = $this->db->tableNamesN(
 408                         'cur',
 409                         'old',
 410                         'page',
 411                         'revision',
 412                         'text'
 413                 );
 414
 415                 $rows = $this->db->query( "
 416                         SELECT cur_title, cur_namespace, COUNT(cur_namespace) AS c
 417                         FROM $cur
 418                         GROUP BY cur_title, cur_namespace
 419                         HAVING c>1",
 420                         __METHOD__
 421                 );
 422
 423                 if ( $rows->numRows() > 0 ) {
 424                         $this->output( wfTimestamp( TS_DB ) );
 425                         $this->output( "......<b>Found duplicate entries</b>\n" );
 426                         $this->output( sprintf( "<b>      %-60s %3s %5s</b>\n", 'Title', 'NS', 'Count' ) );
 427                         $duplicate = array();
 428                         foreach ( $rows as $row ) {
 429                                 if ( !isset( $duplicate[$row->cur_namespace] ) ) {
 430                                         $duplicate[$row->cur_namespace] = array();
 431                                 }
 432
 433                                 $duplicate[$row->cur_namespace][] = $row->cur_title;
 434                                 $this->output( sprintf(
 435                                         "      %-60s %3s %5s\n",
 436                                         $row->cur_title, $row->cur_namespace,
 437                                         $row->c
 438                                 ) );
 439                         }
 440                         $sql = "SELECT cur_title, cur_namespace, cur_id, cur_timestamp FROM $cur WHERE ";
 441                         $firstCond = true;
 442                         foreach ( $duplicate as $ns => $titles ) {
 443                                 if ( $firstCond ) {
 444                                         $firstCond = false;
 445                                 } else {
 446                                         $sql .= ' OR ';
 447                                 }
 448                                 $sql .= "( cur_namespace = {$ns} AND cur_title in (";
 449                                 $first = true;
 450                                 foreach ( $titles as $t ) {
 451                                         if ( $first ) {
 452                                                 $sql .= $this->db->addQuotes( $t );
 453                                                 $first = false;
 454                                         } else {
 455                                                 $sql .= ', ' . $this->db->addQuotes( $t );
 456                                         }
 457                                 }
 458                                 $sql .= ") ) \n";
 459                         }
 460                         # By sorting descending, the most recent entry will be the first in the list.
 461                         # All following entries will be deleted by the next while-loop.
 462                         $sql .= 'ORDER BY cur_namespace, cur_title, cur_timestamp DESC';
 463
 464                         $rows = $this->db->query( $sql, __METHOD__ );
 465
 466                         $prev_title = $prev_namespace = false;
 467                         $deleteId = array();
 468
 469                         foreach ( $rows as $row ) {
 470                                 if ( $prev_title == $row->cur_title && $prev_namespace == $row->cur_namespace ) {
 471                                         $deleteId[] = $row->cur_id;
 472                                 }
 473                                 $prev_title = $row->cur_title;
 474                                 $prev_namespace = $row->cur_namespace;
 475                         }
 476                         $sql = "DELETE FROM $cur WHERE cur_id IN ( " . join( ',', $deleteId ) . ')';
 477                         $this->db->query( $sql, __METHOD__ );
 478                         $this->output( wfTimestamp( TS_DB ) );
 479                         $this->output( "......<b>Deleted</b> " . $this->db->affectedRows() . " records.\n" );
 480                 }
 481
 482                 $this->output( wfTimestamp( TS_DB ) );
 483                 $this->output( "......Creating tables.\n" );
 484                 $this->db->query( "CREATE TABLE $page (
 485                         page_id int(8) unsigned NOT NULL auto_increment,
 486                         page_namespace int NOT NULL,
 487                         page_title varchar(255) binary NOT NULL,
 488                         page_restrictions tinyblob NOT NULL,
 489                         page_counter bigint(20) unsigned NOT NULL default '0',
 490                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 491                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 492                         page_random real unsigned NOT NULL,
 493                         page_touched char(14) binary NOT NULL default '',
 494                         page_latest int(8) unsigned NOT NULL,
 495                         page_len int(8) unsigned NOT NULL,
 496
 497                         PRIMARY KEY page_id (page_id),
 498                         UNIQUE INDEX name_title (page_namespace,page_title),
 499                         INDEX (page_random),
 500                         INDEX (page_len)
 501                         ) ENGINE=InnoDB", __METHOD__ );
 502                 $this->db->query( "CREATE TABLE $revision (
 503                         rev_id int(8) unsigned NOT NULL auto_increment,
 504                         rev_page int(8) unsigned NOT NULL,
 505                         rev_comment tinyblob NOT NULL,
 506                         rev_user int(5) unsigned NOT NULL default '0',
 507                         rev_user_text varchar(255) binary NOT NULL default '',
 508                         rev_timestamp char(14) binary NOT NULL default '',
 509                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 510                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 511                         rev_len int(8) unsigned,
 512                         rev_parent_id int(8) unsigned default NULL,
 513                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 514                         UNIQUE INDEX rev_id (rev_id),
 515                         INDEX rev_timestamp (rev_timestamp),
 516                         INDEX page_timestamp (rev_page,rev_timestamp),
 517                         INDEX user_timestamp (rev_user,rev_timestamp),
 518                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 519                         ) ENGINE=InnoDB", __METHOD__ );
 520
 521                 $this->output( wfTimestamp( TS_DB ) );
 522                 $this->output( "......Locking tables.\n" );
 523                 $this->db->query(
 524                         "LOCK TABLES $page WRITE, $revision WRITE, $old WRITE, $cur WRITE",
 525                         __METHOD__
 526                 );
 527
 528                 $maxold = intval( $this->db->selectField( 'old', 'max(old_id)', '', __METHOD__ ) );
 529                 $this->output( wfTimestamp( TS_DB ) );
 530                 $this->output( "......maxold is {$maxold}\n" );
 531
 532                 $this->output( wfTimestamp( TS_DB ) );
 533                 global $wgLegacySchemaConversion;
 534                 if ( $wgLegacySchemaConversion ) {
 535                         // Create HistoryBlobCurStub entries.
 536                         // Text will be pulled from the leftover 'cur' table at runtime.
 537                         $this->output( "......Moving metadata from cur; using blob references to text in cur table.\n" );
 538                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 539                         $cur_flags = "'object'";
 540                 } else {
 541                         // Copy all cur text in immediately: this may take longer but avoids
 542                         // having to keep an extra table around.
 543                         $this->output( "......Moving text from cur.\n" );
 544                         $cur_text = 'cur_text';
 545                         $cur_flags = "''";
 546                 }
 547                 $this->db->query(
 548                         "INSERT INTO $old (old_namespace, old_title, old_text, old_comment, old_user,
 549                                 old_user_text, old_timestamp, old_minor_edit, old_flags)
 550                         SELECT cur_namespace, cur_title, $cur_text, cur_comment, cur_user, cur_user_text,
 551                                 cur_timestamp, cur_minor_edit, $cur_flags
 552                         FROM $cur",
 553                         __METHOD__
 554                 );
 555
 556                 $this->output( wfTimestamp( TS_DB ) );
 557                 $this->output( "......Setting up revision table.\n" );
 558                 $this->db->query(
 559                         "INSERT INTO $revision (rev_id, rev_page, rev_comment, rev_user,
 560                                 rev_user_text, rev_timestamp, rev_minor_edit)
 561                         SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 562                                 old_timestamp, old_minor_edit
 563                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 564                         __METHOD__
 565                 );
 566
 567                 $this->output( wfTimestamp( TS_DB ) );
 568                 $this->output( "......Setting up page table.\n" );
 569                 $this->db->query(
 570                         "INSERT INTO $page (page_id, page_namespace, page_title,
 571                                 page_restrictions, page_counter, page_is_redirect, page_is_new, page_random,
 572                                 page_touched, page_latest, page_len)
 573                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions, cur_counter,
 574                                 cur_is_redirect, cur_is_new, cur_random, cur_touched, rev_id, LENGTH(cur_text)
 575                         FROM $cur,$revision
 576                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}",
 577                         __METHOD__
 578                 );
 579
 580                 $this->output( wfTimestamp( TS_DB ) );
 581                 $this->output( "......Unlocking tables.\n" );
 582                 $this->db->query( "UNLOCK TABLES", __METHOD__ );
 583
 584                 $this->output( wfTimestamp( TS_DB ) );
 585                 $this->output( "......Renaming old.\n" );
 586                 $this->db->query( "ALTER TABLE $old RENAME TO $text", __METHOD__ );
 587
 588                 $this->output( wfTimestamp( TS_DB ) );
 589                 $this->output( "...done.\n" );
 590         }
 591
 592         protected function doNamespaceSize() {
 593                 $tables = array(
 594                         'page' => 'page',
 595                         'archive' => 'ar',
 596                         'recentchanges' => 'rc',
 597                         'watchlist' => 'wl',
 598                         'querycache' => 'qc',
 599                         'logging' => 'log',
 600                 );
 601                 foreach ( $tables as $table => $prefix ) {
 602                         $field = $prefix . '_namespace';
 603
 604                         $tablename = $this->db->tableName( $table );
 605                         $result = $this->db->query( "SHOW COLUMNS FROM $tablename LIKE '$field'", __METHOD__ );
 606                         $info = $this->db->fetchObject( $result );
 607
 608                         if ( substr( $info->Type, 0, 3 ) == 'int' ) {
 609                                 $this->output( "...$field is already a full int ($info->Type).\n" );
 610                         } else {
 611                                 $this->output( "Promoting $field from $info->Type to int... " );
 612                                 $this->db->query( "ALTER TABLE $tablename MODIFY $field int NOT NULL", __METHOD__ );
 613                                 $this->output( "done.\n" );
 614                         }
 615                 }
 616         }
 617
 618         protected function doPagelinksUpdate() {
 619                 if ( $this->db->tableExists( 'pagelinks', __METHOD__ ) ) {
 620                         $this->output( "...already have pagelinks table.\n" );
 621
 622                         return;
 623                 }
 624
 625                 $this->applyPatch(
 626                         'patch-pagelinks.sql',
 627                         false,
 628                         'Converting links and brokenlinks tables to pagelinks'
 629                 );
 630
 631                 global $wgContLang;
 632                 foreach ( MWNamespace::getCanonicalNamespaces() as $ns => $name ) {
 633                         if ( $ns == 0 ) {
 634                                 continue;
 635                         }
 636
 637                         $this->output( "Cleaning up broken links for namespace $ns... " );
 638
 639                         $pagelinks = $this->db->tableName( 'pagelinks' );
 640                         $name = $wgContLang->getNsText( $ns );
 641                         $prefix = $this->db->strencode( $name );
 642                         $likeprefix = str_replace( '_', '\\_', $prefix );
 643
 644                         $sql = "UPDATE $pagelinks
 645                                            SET pl_namespace=$ns,
 646                                                    pl_title=TRIM(LEADING '$prefix:' FROM pl_title)
 647                                          WHERE pl_namespace=0
 648                                            AND pl_title LIKE '$likeprefix:%'";
 649
 650                         $this->db->query( $sql, __METHOD__ );
 651                         $this->output( "done.\n" );
 652                 }
 653         }
 654
 655         protected function doUserUniqueUpdate() {
 656                 if ( !$this->doTable( 'user' ) ) {
 657                         return true;
 658                 }
 659
 660                 $duper = new UserDupes( $this->db, array( $this, 'output' ) );
 661                 if ( $duper->hasUniqueIndex() ) {
 662                         $this->output( "...already have unique user_name index.\n" );
 663
 664                         return;
 665                 }
 666
 667                 if ( !$duper->clearDupes() ) {
 668                         $this->output( "WARNING: This next step will probably fail due to unfixed duplicates...\n" );
 669                 }
 670                 $this->applyPatch( 'patch-user_nameindex.sql', false, "Adding unique index on user_name" );
 671         }
 672
 673         protected function doUserGroupsUpdate() {
 674                 if ( !$this->doTable( 'user_groups' ) ) {
 675                         return true;
 676                 }
 677
 678                 if ( $this->db->tableExists( 'user_groups', __METHOD__ ) ) {
 679                         $info = $this->db->fieldInfo( 'user_groups', 'ug_group' );
 680                         if ( $info->type() == 'int' ) {
 681                                 $oldug = $this->db->tableName( 'user_groups' );
 682                                 $newug = $this->db->tableName( 'user_groups_bogus' );
 683                                 $this->output( "user_groups table exists but is in bogus intermediate " .
 684                                         "format. Renaming to $newug... " );
 685                                 $this->db->query( "ALTER TABLE $oldug RENAME TO $newug", __METHOD__ );
 686                                 $this->output( "done.\n" );
 687
 688                                 $this->applyPatch( 'patch-user_groups.sql', false, "Re-adding fresh user_groups table" );
 689
 690                                 $this->output( "***\n" );
 691                                 $this->output( "*** WARNING: You will need to manually fix up user " .
 692                                         "permissions in the user_groups\n" );
 693                                 $this->output( "*** table. Old 1.5 alpha versions did some pretty funky stuff...\n" );
 694                                 $this->output( "***\n" );
 695                         } else {
 696                                 $this->output( "...user_groups table exists and is in current format.\n" );
 697                         }
 698
 699                         return;
 700                 }
 701
 702                 $this->applyPatch( 'patch-user_groups.sql', false, "Adding user_groups table" );
 703
 704                 if ( !$this->db->tableExists( 'user_rights', __METHOD__ ) ) {
 705                         if ( $this->db->fieldExists( 'user', 'user_rights', __METHOD__ ) ) {
 706                                 $this->applyPatch(
 707                                         'patch-user_rights.sql',
 708                                         false,
 709                                         'Upgrading from a 1.3 or older database? Breaking out user_rights for conversion'
 710                                 );
 711                         } else {
 712                                 $this->output( "*** WARNING: couldn't locate user_rights table or field for upgrade.\n" );
 713                                 $this->output( "*** You may need to manually configure some sysops by manipulating\n" );
 714                                 $this->output( "*** the user_groups table.\n" );
 715
 716                                 return;
 717                         }
 718                 }
 719
 720                 $this->output( "Converting user_rights table to user_groups... " );
 721                 $result = $this->db->select( 'user_rights',
 722                         array( 'ur_user', 'ur_rights' ),
 723                         array( "ur_rights != ''" ),
 724                         __METHOD__ );
 725
 726                 foreach ( $result as $row ) {
 727                         $groups = array_unique(
 728                                 array_map( 'trim',
 729                                         explode( ',', $row->ur_rights ) ) );
 730
 731                         foreach ( $groups as $group ) {
 732                                 $this->db->insert( 'user_groups',
 733                                         array(
 734                                                 'ug_user' => $row->ur_user,
 735                                                 'ug_group' => $group ),
 736                                         __METHOD__ );
 737                         }
 738                 }
 739                 $this->output( "done.\n" );
 740         }
 741
 742         /**
 743          * Make sure wl_notificationtimestamp can be NULL,
 744          * and update old broken items.
 745          */
 746         protected function doWatchlistNull() {
 747                 $info = $this->db->fieldInfo( 'watchlist', 'wl_notificationtimestamp' );
 748                 if ( !$info ) {
 749                         return;
 750                 }
 751                 if ( $info->isNullable() ) {
 752                         $this->output( "...wl_notificationtimestamp is already nullable.\n" );
 753
 754                         return;
 755                 }
 756
 757                 $this->applyPatch(
 758                         'patch-watchlist-null.sql',
 759                         false,
 760                         'Making wl_notificationtimestamp nullable'
 761                 );
 762         }
 763
 764         /**
 765          * Set page_random field to a random value where it is equals to 0.
 766          *
 767          * @see bug 3946
 768          */
 769         protected function doPageRandomUpdate() {
 770                 $page = $this->db->tableName( 'page' );
 771                 $this->db->query( "UPDATE $page SET page_random = RAND() WHERE page_random = 0", __METHOD__ );
 772                 $rows = $this->db->affectedRows();
 773
 774                 if ( $rows ) {
 775                         $this->output( "Set page_random to a random value on $rows rows where it was set to 0\n" );
 776                 } else {
 777                         $this->output( "...no page_random rows needed to be set\n" );
 778                 }
 779         }
 780
 781         protected function doTemplatelinksUpdate() {
 782                 if ( $this->db->tableExists( 'templatelinks', __METHOD__ ) ) {
 783                         $this->output( "...templatelinks table already exists\n" );
 784
 785                         return;
 786                 }
 787
 788                 $this->applyPatch( 'patch-templatelinks.sql', false, "Creating templatelinks table" );
 789
 790                 $this->output( "Populating...\n" );
 791                 if ( wfGetLB()->getServerCount() > 1 ) {
 792                         // Slow, replication-friendly update
 793                         $res = $this->db->select( 'pagelinks', array( 'pl_from', 'pl_namespace', 'pl_title' ),
 794                                 array( 'pl_namespace' => NS_TEMPLATE ), __METHOD__ );
 795                         $count = 0;
 796                         foreach ( $res as $row ) {
 797                                 $count = ( $count + 1 ) % 100;
 798                                 if ( $count == 0 ) {
 799                                         wfWaitForSlaves();
 800                                 }
 801                                 $this->db->insert( 'templatelinks',
 802                                         array(
 803                                                 'tl_from' => $row->pl_from,
 804                                                 'tl_namespace' => $row->pl_namespace,
 805                                                 'tl_title' => $row->pl_title,
 806                                         ), __METHOD__
 807                                 );
 808                         }
 809                 } else {
 810                         // Fast update
 811                         $this->db->insertSelect( 'templatelinks', 'pagelinks',
 812                                 array(
 813                                         'tl_from' => 'pl_from',
 814                                         'tl_namespace' => 'pl_namespace',
 815                                         'tl_title' => 'pl_title'
 816                                 ), array(
 817                                         'pl_namespace' => 10
 818                                 ), __METHOD__
 819                         );
 820                 }
 821                 $this->output( "Done. Please run maintenance/refreshLinks.php for a more " .
 822                         "thorough templatelinks update.\n" );
 823         }
 824
 825         protected function doBacklinkingIndicesUpdate() {
 826                 if ( !$this->indexHasField( 'pagelinks', 'pl_namespace', 'pl_from' ) ||
 827                         !$this->indexHasField( 'templatelinks', 'tl_namespace', 'tl_from' ) ||
 828                         !$this->indexHasField( 'imagelinks', 'il_to', 'il_from' )
 829                 ) {
 830                         $this->applyPatch( 'patch-backlinkindexes.sql', false, "Updating backlinking indices" );
 831                 }
 832         }
 833
 834         /**
 835          * Adding page_restrictions table, obsoleting page.page_restrictions.
 836          * Migrating old restrictions to new table
 837          * -- Andrew Garrett, January 2007.
 838          */
 839         protected function doRestrictionsUpdate() {
 840                 if ( $this->db->tableExists( 'page_restrictions', __METHOD__ ) ) {
 841                         $this->output( "...page_restrictions table already exists.\n" );
 842
 843                         return;
 844                 }
 845
 846                 $this->applyPatch(
 847                         'patch-page_restrictions.sql',
 848                         false,
 849                         'Creating page_restrictions table (1/2)'
 850                 );
 851                 $this->applyPatch(
 852                         'patch-page_restrictions_sortkey.sql',
 853                         false,
 854                         'Creating page_restrictions table (2/2)'
 855                 );
 856                 $this->output( "done.\n" );
 857
 858                 $this->output( "Migrating old restrictions to new table...\n" );
 859                 $task = $this->maintenance->runChild( 'UpdateRestrictions' );
 860                 $task->execute();
 861         }
 862
 863         protected function doCategorylinksIndicesUpdate() {
 864                 if ( !$this->indexHasField( 'categorylinks', 'cl_sortkey', 'cl_from' ) ) {
 865                         $this->applyPatch( 'patch-categorylinksindex.sql', false, "Updating categorylinks Indices" );
 866                 }
 867         }
 868
 869         protected function doCategoryPopulation() {
 870                 if ( $this->updateRowExists( 'populate category' ) ) {
 871                         $this->output( "...category table already populated.\n" );
 872
 873                         return;
 874                 }
 875
 876                 $this->output(
 877                         "Populating category table, printing progress markers. " .
 878                         "For large databases, you\n" .
 879                         "may want to hit Ctrl-C and do this manually with maintenance/\n" .
 880                         "populateCategory.php.\n"
 881                 );
 882                 $task = $this->maintenance->runChild( 'PopulateCategory' );
 883                 $task->execute();
 884                 $this->output( "Done populating category table.\n" );
 885         }
 886
 887         protected function doPopulateParentId() {
 888                 if ( !$this->updateRowExists( 'populate rev_parent_id' ) ) {
 889                         $this->output(
 890                                 "Populating rev_parent_id fields, printing progress markers. For large\n" .
 891                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 892                                 "maintenance/populateParentId.php.\n" );
 893
 894                         $task = $this->maintenance->runChild( 'PopulateParentId' );
 895                         $task->execute();
 896                 }
 897         }
 898
 899         protected function doEnableProfiling() {
 900                 global $wgProfileToDatabase;
 901
 902                 if ( !$this->doTable( 'profiling' ) ) {
 903                         return true;
 904                 }
 905
 906                 if ( $wgProfileToDatabase === true && !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 907                         $this->applyPatch( 'patch-profiling.sql', false, 'Add profiling table' );
 908                 }
 909         }
 910
 911         protected function doMaybeProfilingMemoryUpdate() {
 912                 if ( !$this->doTable( 'profiling' ) ) {
 913                         return true;
 914                 }
 915
 916                 if ( !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 917                         return true;
 918                 } elseif ( $this->db->fieldExists( 'profiling', 'pf_memory', __METHOD__ ) ) {
 919                         $this->output( "...profiling table has pf_memory field.\n" );
 920
 921                         return true;
 922                 }
 923
 924                 return $this->applyPatch(
 925                         'patch-profiling-memory.sql',
 926                         false,
 927                         'Adding pf_memory field to table profiling'
 928                 );
 929         }
 930
 931         protected function doFilearchiveIndicesUpdate() {
 932                 $info = $this->db->indexInfo( 'filearchive', 'fa_user_timestamp', __METHOD__ );
 933                 if ( !$info ) {
 934                         $this->applyPatch( 'patch-filearchive-user-index.sql', false, "Updating filearchive indices" );
 935                 }
 936
 937                 return true;
 938         }
 939
 940         protected function doUniquePlTlIl() {
 941                 $info = $this->db->indexInfo( 'pagelinks', 'pl_namespace' );
 942                 if ( is_array( $info ) && !$info[0]->Non_unique ) {
 943                         $this->output( "...pl_namespace, tl_namespace, il_to indices are already UNIQUE.\n" );
 944
 945                         return true;
 946                 }
 947                 if ( $this->skipSchema ) {
 948                         $this->output( "...skipping schema change (making pl_namespace, tl_namespace " .
 949                                 "and il_to indices UNIQUE).\n" );
 950
 951                         return false;
 952                 }
 953
 954                 return $this->applyPatch(
 955                         'patch-pl-tl-il-unique.sql',
 956                         false,
 957                         'Making pl_namespace, tl_namespace and il_to indices UNIQUE'
 958                 );
 959         }
 960
 961         protected function doUpdateMimeMinorField() {
 962                 if ( $this->updateRowExists( 'mime_minor_length' ) ) {
 963                         $this->output( "...*_mime_minor fields are already long enough.\n" );
 964
 965                         return;
 966                 }
 967
 968                 $this->applyPatch(
 969                         'patch-mime_minor_length.sql',
 970                         false,
 971                         'Altering all *_mime_minor fields to 100 bytes in size'
 972                 );
 973         }
 974
 975         protected function doClFieldsUpdate() {
 976                 if ( $this->updateRowExists( 'cl_fields_update' ) ) {
 977                         $this->output( "...categorylinks up-to-date.\n" );
 978
 979                         return;
 980                 }
 981
 982                 $this->applyPatch(
 983                         'patch-categorylinks-better-collation2.sql',
 984                         false,
 985                         'Updating categorylinks (again)'
 986                 );
 987         }
 988
 989         protected function doLangLinksLengthUpdate() {
 990                 $langlinks = $this->db->tableName( 'langlinks' );
 991                 $res = $this->db->query( "SHOW COLUMNS FROM $langlinks LIKE 'll_lang'" );
 992                 $row = $this->db->fetchObject( $res );
 993
 994                 if ( $row && $row->Type == "varbinary(10)" ) {
 995                         $this->applyPatch(
 996                                 'patch-langlinks-ll_lang-20.sql',
 997                                 false,
 998                                 'Updating length of ll_lang in langlinks'
 999                         );
1000                 } else {
1001                         $this->output( "...ll_lang is up-to-date.\n" );
1002                 }
1003         }
1004
1005         protected function doUserNewTalkTimestampNotNull() {
1006                 if ( !$this->doTable( 'user_newtalk' ) ) {
1007                         return true;
1008                 }
1009
1010                 $info = $this->db->fieldInfo( 'user_newtalk', 'user_last_timestamp' );
1011                 if ( $info === false ) {
1012                         return;
1013                 }
1014                 if ( $info->isNullable() ) {
1015                         $this->output( "...user_last_timestamp is already nullable.\n" );
1016
1017                         return;
1018                 }
1019
1020                 $this->applyPatch(
1021                         'patch-user-newtalk-timestamp-null.sql',
1022                         false,
1023                         'Making user_last_timestamp nullable'
1024                 );
1025         }
1026
1027         protected function doIwlinksIndexNonUnique() {
1028                 $info = $this->db->indexInfo( 'iwlinks', 'iwl_prefix_title_from' );
1029                 if ( is_array( $info ) && $info[0]->Non_unique ) {
1030                         $this->output( "...iwl_prefix_title_from index is already non-UNIQUE.\n" );
1031
1032                         return true;
1033                 }
1034                 if ( $this->skipSchema ) {
1035                         $this->output( "...skipping schema change (making iwl_prefix_title_from index non-UNIQUE).\n" );
1036
1037                         return false;
1038                 }
1039
1040                 return $this->applyPatch(
1041                         'patch-iwl_prefix_title_from-non-unique.sql',
1042                         false,
1043                         'Making iwl_prefix_title_from index non-UNIQUE'
1044                 );
1045         }
1046 }