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         protected function getCoreUpdateList() {
  32                 return array(
  33                         array( 'disableContentHandlerUseDB' ),
  34
  35                         // 1.2
  36                         array( 'addField', 'ipblocks', 'ipb_id', 'patch-ipblocks.sql' ),
  37                         array( 'addField', 'ipblocks', 'ipb_expiry', 'patch-ipb_expiry.sql' ),
  38                         array( 'doInterwikiUpdate' ),
  39                         array( 'doIndexUpdate' ),
  40                         array( 'addTable', 'hitcounter', 'patch-hitcounter.sql' ),
  41                         array( 'addField', 'recentchanges', 'rc_type', 'patch-rc_type.sql' ),
  42                         array( 'addIndex', 'recentchanges', 'new_name_timestamp', 'patch-rc-newindex.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
 246                         // 1.23
 247                         array( 'addField', 'recentchanges', 'rc_source', 'patch-rc_source.sql' ),
 248                         array( 'addIndex', 'logging', 'log_user_text_type_time',
 249                                 'patch-logging_user_text_type_time_index.sql' ),
 250                         array( 'addIndex', 'logging', 'log_user_text_time', 'patch-logging_user_text_time_index.sql' ),
 251                         array( 'addField', 'page', 'page_links_updated', 'patch-page_links_updated.sql' ),
 252                         array( 'addField', 'user', 'user_password_expires', 'patch-user_password_expire.sql' ),
 253                         array( 'addField', 'page_props', 'pp_sortkey', 'patch-pp_sortkey.sql' ),
 254                 );
 255         }
 256
 257         /**
 258          * 1.4 betas were missing the 'binary' marker from logging.log_title,
 259          * which causes a collation mismatch error on joins in MySQL 4.1.
 260          *
 261          * @param string $table Table name
 262          * @param string $field Field name to check
 263          * @param string $patchFile Path to the patch to correct the field
 264          * @return bool
 265          */
 266         protected function checkBin( $table, $field, $patchFile ) {
 267                 if ( !$this->doTable( $table ) ) {
 268                         return true;
 269                 }
 270
 271                 /** @var MySQLField $fieldInfo */
 272                 $fieldInfo = $this->db->fieldInfo( $table, $field );
 273                 if ( $fieldInfo->isBinary() ) {
 274                         $this->output( "...$table table has correct $field encoding.\n" );
 275                 } else {
 276                         $this->applyPatch( $patchFile, false, "Fixing $field encoding on $table table" );
 277                 }
 278         }
 279
 280         /**
 281          * Check whether an index contain a field
 282          *
 283          * @param string $table Table name
 284          * @param string $index Index name to check
 285          * @param string $field Field that should be in the index
 286          * @return bool
 287          */
 288         protected function indexHasField( $table, $index, $field ) {
 289                 if ( !$this->doTable( $table ) ) {
 290                         return true;
 291                 }
 292
 293                 $info = $this->db->indexInfo( $table, $index, __METHOD__ );
 294                 if ( $info ) {
 295                         foreach ( $info as $row ) {
 296                                 if ( $row->Column_name == $field ) {
 297                                         $this->output( "...index $index on table $table includes field $field.\n" );
 298
 299                                         return true;
 300                                 }
 301                         }
 302                 }
 303                 $this->output( "...index $index on table $table has no field $field; added.\n" );
 304
 305                 return false;
 306         }
 307
 308         /**
 309          * Check that interwiki table exists; if it doesn't source it
 310          */
 311         protected function doInterwikiUpdate() {
 312                 global $IP;
 313
 314                 if ( !$this->doTable( 'interwiki' ) ) {
 315                         return true;
 316                 }
 317
 318                 if ( $this->db->tableExists( "interwiki", __METHOD__ ) ) {
 319                         $this->output( "...already have interwiki table\n" );
 320
 321                         return;
 322                 }
 323
 324                 $this->applyPatch( 'patch-interwiki.sql', false, 'Creating interwiki table' );
 325                 $this->applyPatch(
 326                         "$IP/maintenance/interwiki.sql",
 327                         true,
 328                         'Adding default interwiki definitions'
 329                 );
 330         }
 331
 332         /**
 333          * Check that proper indexes are in place
 334          */
 335         protected function doIndexUpdate() {
 336                 $meta = $this->db->fieldInfo( 'recentchanges', 'rc_timestamp' );
 337                 if ( $meta === false ) {
 338                         throw new MWException( 'Missing rc_timestamp field of recentchanges table. Should not happen.' );
 339                 }
 340                 if ( $meta->isMultipleKey() ) {
 341                         $this->output( "...indexes seem up to 20031107 standards.\n" );
 342
 343                         return;
 344                 }
 345
 346                 $this->applyPatch( 'patch-indexes.sql', true, "Updating indexes to 20031107" );
 347         }
 348
 349         protected function doOldLinksUpdate() {
 350                 $cl = $this->maintenance->runChild( 'ConvertLinks' );
 351                 $cl->execute();
 352         }
 353
 354         protected function doFixAncientImagelinks() {
 355                 $info = $this->db->fieldInfo( 'imagelinks', 'il_from' );
 356                 if ( !$info || $info->type() !== 'string' ) {
 357                         $this->output( "...il_from OK\n" );
 358
 359                         return;
 360                 }
 361
 362                 $applied = $this->applyPatch(
 363                         'patch-fix-il_from.sql',
 364                         false,
 365                         'Fixing ancient broken imagelinks table.'
 366                 );
 367
 368                 if ( $applied ) {
 369                         $this->output( "NOTE: you will have to run maintenance/refreshLinks.php after this." );
 370                 }
 371         }
 372
 373         /**
 374          * Check if we need to add talk page rows to the watchlist
 375          */
 376         function doWatchlistUpdate() {
 377                 $talk = $this->db->selectField( 'watchlist', 'count(*)', 'wl_namespace & 1', __METHOD__ );
 378                 $nontalk = $this->db->selectField(
 379                         'watchlist',
 380                         'count(*)',
 381                         'NOT (wl_namespace & 1)',
 382                         __METHOD__
 383                 );
 384                 if ( $talk == $nontalk ) {
 385                         $this->output( "...watchlist talk page rows already present.\n" );
 386
 387                         return;
 388                 }
 389
 390                 $this->output( "Adding missing watchlist talk page rows... " );
 391                 $this->db->insertSelect( 'watchlist', 'watchlist',
 392                         array(
 393                                 'wl_user' => 'wl_user',
 394                                 'wl_namespace' => 'wl_namespace | 1',
 395                                 'wl_title' => 'wl_title',
 396                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 397                         ), array( 'NOT (wl_namespace & 1)' ), __METHOD__, 'IGNORE' );
 398                 $this->output( "done.\n" );
 399
 400                 $this->output( "Adding missing watchlist subject page rows... " );
 401                 $this->db->insertSelect( 'watchlist', 'watchlist',
 402                         array(
 403                                 'wl_user' => 'wl_user',
 404                                 'wl_namespace' => 'wl_namespace & ~1',
 405                                 'wl_title' => 'wl_title',
 406                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 407                         ), array( 'wl_namespace & 1' ), __METHOD__, 'IGNORE' );
 408                 $this->output( "done.\n" );
 409         }
 410
 411         function doSchemaRestructuring() {
 412                 if ( $this->db->tableExists( 'page', __METHOD__ ) ) {
 413                         $this->output( "...page table already exists.\n" );
 414
 415                         return;
 416                 }
 417
 418                 $this->output( "...converting from cur/old to page/revision/text DB structure.\n" );
 419                 $this->output( wfTimestamp( TS_DB ) );
 420                 $this->output( "......checking for duplicate entries.\n" );
 421
 422                 list( $cur, $old, $page, $revision, $text ) = $this->db->tableNamesN(
 423                         'cur',
 424                         'old',
 425                         'page',
 426                         'revision',
 427                         'text'
 428                 );
 429
 430                 $rows = $this->db->query( "
 431                         SELECT cur_title, cur_namespace, COUNT(cur_namespace) AS c
 432                         FROM $cur
 433                         GROUP BY cur_title, cur_namespace
 434                         HAVING c>1",
 435                         __METHOD__
 436                 );
 437
 438                 if ( $rows->numRows() > 0 ) {
 439                         $this->output( wfTimestamp( TS_DB ) );
 440                         $this->output( "......<b>Found duplicate entries</b>\n" );
 441                         $this->output( sprintf( "<b>      %-60s %3s %5s</b>\n", 'Title', 'NS', 'Count' ) );
 442                         $duplicate = array();
 443                         foreach ( $rows as $row ) {
 444                                 if ( !isset( $duplicate[$row->cur_namespace] ) ) {
 445                                         $duplicate[$row->cur_namespace] = array();
 446                                 }
 447
 448                                 $duplicate[$row->cur_namespace][] = $row->cur_title;
 449                                 $this->output( sprintf(
 450                                         "      %-60s %3s %5s\n",
 451                                         $row->cur_title, $row->cur_namespace,
 452                                         $row->c
 453                                 ) );
 454                         }
 455                         $sql = "SELECT cur_title, cur_namespace, cur_id, cur_timestamp FROM $cur WHERE ";
 456                         $firstCond = true;
 457                         foreach ( $duplicate as $ns => $titles ) {
 458                                 if ( $firstCond ) {
 459                                         $firstCond = false;
 460                                 } else {
 461                                         $sql .= ' OR ';
 462                                 }
 463                                 $sql .= "( cur_namespace = {$ns} AND cur_title in (";
 464                                 $first = true;
 465                                 foreach ( $titles as $t ) {
 466                                         if ( $first ) {
 467                                                 $sql .= $this->db->addQuotes( $t );
 468                                                 $first = false;
 469                                         } else {
 470                                                 $sql .= ', ' . $this->db->addQuotes( $t );
 471                                         }
 472                                 }
 473                                 $sql .= ") ) \n";
 474                         }
 475                         # By sorting descending, the most recent entry will be the first in the list.
 476                         # All following entries will be deleted by the next while-loop.
 477                         $sql .= 'ORDER BY cur_namespace, cur_title, cur_timestamp DESC';
 478
 479                         $rows = $this->db->query( $sql, __METHOD__ );
 480
 481                         $prev_title = $prev_namespace = false;
 482                         $deleteId = array();
 483
 484                         foreach ( $rows as $row ) {
 485                                 if ( $prev_title == $row->cur_title && $prev_namespace == $row->cur_namespace ) {
 486                                         $deleteId[] = $row->cur_id;
 487                                 }
 488                                 $prev_title = $row->cur_title;
 489                                 $prev_namespace = $row->cur_namespace;
 490                         }
 491                         $sql = "DELETE FROM $cur WHERE cur_id IN ( " . join( ',', $deleteId ) . ')';
 492                         $this->db->query( $sql, __METHOD__ );
 493                         $this->output( wfTimestamp( TS_DB ) );
 494                         $this->output( "......<b>Deleted</b> " . $this->db->affectedRows() . " records.\n" );
 495                 }
 496
 497                 $this->output( wfTimestamp( TS_DB ) );
 498                 $this->output( "......Creating tables.\n" );
 499                 $this->db->query( "CREATE TABLE $page (
 500                         page_id int(8) unsigned NOT NULL auto_increment,
 501                         page_namespace int NOT NULL,
 502                         page_title varchar(255) binary NOT NULL,
 503                         page_restrictions tinyblob NOT NULL,
 504                         page_counter bigint(20) unsigned NOT NULL default '0',
 505                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 506                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 507                         page_random real unsigned NOT NULL,
 508                         page_touched char(14) binary NOT NULL default '',
 509                         page_latest int(8) unsigned NOT NULL,
 510                         page_len int(8) unsigned NOT NULL,
 511
 512                         PRIMARY KEY page_id (page_id),
 513                         UNIQUE INDEX name_title (page_namespace,page_title),
 514                         INDEX (page_random),
 515                         INDEX (page_len)
 516                         ) ENGINE=InnoDB", __METHOD__ );
 517                 $this->db->query( "CREATE TABLE $revision (
 518                         rev_id int(8) unsigned NOT NULL auto_increment,
 519                         rev_page int(8) unsigned NOT NULL,
 520                         rev_comment tinyblob NOT NULL,
 521                         rev_user int(5) unsigned NOT NULL default '0',
 522                         rev_user_text varchar(255) binary NOT NULL default '',
 523                         rev_timestamp char(14) binary NOT NULL default '',
 524                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 525                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 526                         rev_len int(8) unsigned,
 527                         rev_parent_id int(8) unsigned default NULL,
 528                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 529                         UNIQUE INDEX rev_id (rev_id),
 530                         INDEX rev_timestamp (rev_timestamp),
 531                         INDEX page_timestamp (rev_page,rev_timestamp),
 532                         INDEX user_timestamp (rev_user,rev_timestamp),
 533                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 534                         ) ENGINE=InnoDB", __METHOD__ );
 535
 536                 $this->output( wfTimestamp( TS_DB ) );
 537                 $this->output( "......Locking tables.\n" );
 538                 $this->db->query(
 539                         "LOCK TABLES $page WRITE, $revision WRITE, $old WRITE, $cur WRITE",
 540                         __METHOD__
 541                 );
 542
 543                 $maxold = intval( $this->db->selectField( 'old', 'max(old_id)', '', __METHOD__ ) );
 544                 $this->output( wfTimestamp( TS_DB ) );
 545                 $this->output( "......maxold is {$maxold}\n" );
 546
 547                 $this->output( wfTimestamp( TS_DB ) );
 548                 global $wgLegacySchemaConversion;
 549                 if ( $wgLegacySchemaConversion ) {
 550                         // Create HistoryBlobCurStub entries.
 551                         // Text will be pulled from the leftover 'cur' table at runtime.
 552                         $this->output( "......Moving metadata from cur; using blob references to text in cur table.\n" );
 553                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 554                         $cur_flags = "'object'";
 555                 } else {
 556                         // Copy all cur text in immediately: this may take longer but avoids
 557                         // having to keep an extra table around.
 558                         $this->output( "......Moving text from cur.\n" );
 559                         $cur_text = 'cur_text';
 560                         $cur_flags = "''";
 561                 }
 562                 $this->db->query(
 563                         "INSERT INTO $old (old_namespace, old_title, old_text, old_comment, old_user,
 564                                 old_user_text, old_timestamp, old_minor_edit, old_flags)
 565                         SELECT cur_namespace, cur_title, $cur_text, cur_comment, cur_user, cur_user_text,
 566                                 cur_timestamp, cur_minor_edit, $cur_flags
 567                         FROM $cur",
 568                         __METHOD__
 569                 );
 570
 571                 $this->output( wfTimestamp( TS_DB ) );
 572                 $this->output( "......Setting up revision table.\n" );
 573                 $this->db->query(
 574                         "INSERT INTO $revision (rev_id, rev_page, rev_comment, rev_user,
 575                                 rev_user_text, rev_timestamp, rev_minor_edit)
 576                         SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 577                                 old_timestamp, old_minor_edit
 578                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 579                         __METHOD__
 580                 );
 581
 582                 $this->output( wfTimestamp( TS_DB ) );
 583                 $this->output( "......Setting up page table.\n" );
 584                 $this->db->query(
 585                         "INSERT INTO $page (page_id, page_namespace, page_title,
 586                                 page_restrictions, page_counter, page_is_redirect, page_is_new, page_random,
 587                                 page_touched, page_latest, page_len)
 588                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions, cur_counter,
 589                                 cur_is_redirect, cur_is_new, cur_random, cur_touched, rev_id, LENGTH(cur_text)
 590                         FROM $cur,$revision
 591                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}",
 592                         __METHOD__
 593                 );
 594
 595                 $this->output( wfTimestamp( TS_DB ) );
 596                 $this->output( "......Unlocking tables.\n" );
 597                 $this->db->query( "UNLOCK TABLES", __METHOD__ );
 598
 599                 $this->output( wfTimestamp( TS_DB ) );
 600                 $this->output( "......Renaming old.\n" );
 601                 $this->db->query( "ALTER TABLE $old RENAME TO $text", __METHOD__ );
 602
 603                 $this->output( wfTimestamp( TS_DB ) );
 604                 $this->output( "...done.\n" );
 605         }
 606
 607         protected function doNamespaceSize() {
 608                 $tables = array(
 609                         'page' => 'page',
 610                         'archive' => 'ar',
 611                         'recentchanges' => 'rc',
 612                         'watchlist' => 'wl',
 613                         'querycache' => 'qc',
 614                         'logging' => 'log',
 615                 );
 616                 foreach ( $tables as $table => $prefix ) {
 617                         $field = $prefix . '_namespace';
 618
 619                         $tablename = $this->db->tableName( $table );
 620                         $result = $this->db->query( "SHOW COLUMNS FROM $tablename LIKE '$field'", __METHOD__ );
 621                         $info = $this->db->fetchObject( $result );
 622
 623                         if ( substr( $info->Type, 0, 3 ) == 'int' ) {
 624                                 $this->output( "...$field is already a full int ($info->Type).\n" );
 625                         } else {
 626                                 $this->output( "Promoting $field from $info->Type to int... " );
 627                                 $this->db->query( "ALTER TABLE $tablename MODIFY $field int NOT NULL", __METHOD__ );
 628                                 $this->output( "done.\n" );
 629                         }
 630                 }
 631         }
 632
 633         protected function doPagelinksUpdate() {
 634                 if ( $this->db->tableExists( 'pagelinks', __METHOD__ ) ) {
 635                         $this->output( "...already have pagelinks table.\n" );
 636
 637                         return;
 638                 }
 639
 640                 $this->applyPatch(
 641                         'patch-pagelinks.sql',
 642                         false,
 643                         'Converting links and brokenlinks tables to pagelinks'
 644                 );
 645
 646                 global $wgContLang;
 647                 foreach ( MWNamespace::getCanonicalNamespaces() as $ns => $name ) {
 648                         if ( $ns == 0 ) {
 649                                 continue;
 650                         }
 651
 652                         $this->output( "Cleaning up broken links for namespace $ns... " );
 653
 654                         $pagelinks = $this->db->tableName( 'pagelinks' );
 655                         $name = $wgContLang->getNsText( $ns );
 656                         $prefix = $this->db->strencode( $name );
 657                         $likeprefix = str_replace( '_', '\\_', $prefix );
 658
 659                         $sql = "UPDATE $pagelinks
 660                                            SET pl_namespace=$ns,
 661                                                    pl_title=TRIM(LEADING '$prefix:' FROM pl_title)
 662                                          WHERE pl_namespace=0
 663                                            AND pl_title LIKE '$likeprefix:%'";
 664
 665                         $this->db->query( $sql, __METHOD__ );
 666                         $this->output( "done.\n" );
 667                 }
 668         }
 669
 670         protected function doUserUniqueUpdate() {
 671                 if ( !$this->doTable( 'user' ) ) {
 672                         return true;
 673                 }
 674
 675                 $duper = new UserDupes( $this->db, array( $this, 'output' ) );
 676                 if ( $duper->hasUniqueIndex() ) {
 677                         $this->output( "...already have unique user_name index.\n" );
 678
 679                         return;
 680                 }
 681
 682                 if ( !$duper->clearDupes() ) {
 683                         $this->output( "WARNING: This next step will probably fail due to unfixed duplicates...\n" );
 684                 }
 685                 $this->applyPatch( 'patch-user_nameindex.sql', false, "Adding unique index on user_name" );
 686         }
 687
 688         protected function doUserGroupsUpdate() {
 689                 if ( !$this->doTable( 'user_groups' ) ) {
 690                         return true;
 691                 }
 692
 693                 if ( $this->db->tableExists( 'user_groups', __METHOD__ ) ) {
 694                         $info = $this->db->fieldInfo( 'user_groups', 'ug_group' );
 695                         if ( $info->type() == 'int' ) {
 696                                 $oldug = $this->db->tableName( 'user_groups' );
 697                                 $newug = $this->db->tableName( 'user_groups_bogus' );
 698                                 $this->output( "user_groups table exists but is in bogus intermediate " .
 699                                         "format. Renaming to $newug... " );
 700                                 $this->db->query( "ALTER TABLE $oldug RENAME TO $newug", __METHOD__ );
 701                                 $this->output( "done.\n" );
 702
 703                                 $this->applyPatch( 'patch-user_groups.sql', false, "Re-adding fresh user_groups table" );
 704
 705                                 $this->output( "***\n" );
 706                                 $this->output( "*** WARNING: You will need to manually fix up user " .
 707                                         "permissions in the user_groups\n" );
 708                                 $this->output( "*** table. Old 1.5 alpha versions did some pretty funky stuff...\n" );
 709                                 $this->output( "***\n" );
 710                         } else {
 711                                 $this->output( "...user_groups table exists and is in current format.\n" );
 712                         }
 713
 714                         return;
 715                 }
 716
 717                 $this->applyPatch( 'patch-user_groups.sql', false, "Adding user_groups table" );
 718
 719                 if ( !$this->db->tableExists( 'user_rights', __METHOD__ ) ) {
 720                         if ( $this->db->fieldExists( 'user', 'user_rights', __METHOD__ ) ) {
 721                                 $this->applyPatch(
 722                                         'patch-user_rights.sql',
 723                                         false,
 724                                         'Upgrading from a 1.3 or older database? Breaking out user_rights for conversion'
 725                                 );
 726                         } else {
 727                                 $this->output( "*** WARNING: couldn't locate user_rights table or field for upgrade.\n" );
 728                                 $this->output( "*** You may need to manually configure some sysops by manipulating\n" );
 729                                 $this->output( "*** the user_groups table.\n" );
 730
 731                                 return;
 732                         }
 733                 }
 734
 735                 $this->output( "Converting user_rights table to user_groups... " );
 736                 $result = $this->db->select( 'user_rights',
 737                         array( 'ur_user', 'ur_rights' ),
 738                         array( "ur_rights != ''" ),
 739                         __METHOD__ );
 740
 741                 foreach ( $result as $row ) {
 742                         $groups = array_unique(
 743                                 array_map( 'trim',
 744                                         explode( ',', $row->ur_rights ) ) );
 745
 746                         foreach ( $groups as $group ) {
 747                                 $this->db->insert( 'user_groups',
 748                                         array(
 749                                                 'ug_user' => $row->ur_user,
 750                                                 'ug_group' => $group ),
 751                                         __METHOD__ );
 752                         }
 753                 }
 754                 $this->output( "done.\n" );
 755         }
 756
 757         /**
 758          * Make sure wl_notificationtimestamp can be NULL,
 759          * and update old broken items.
 760          */
 761         protected function doWatchlistNull() {
 762                 $info = $this->db->fieldInfo( 'watchlist', 'wl_notificationtimestamp' );
 763                 if ( !$info ) {
 764                         return;
 765                 }
 766                 if ( $info->isNullable() ) {
 767                         $this->output( "...wl_notificationtimestamp is already nullable.\n" );
 768
 769                         return;
 770                 }
 771
 772                 $this->applyPatch(
 773                         'patch-watchlist-null.sql',
 774                         false,
 775                         'Making wl_notificationtimestamp nullable'
 776                 );
 777         }
 778
 779         /**
 780          * Set page_random field to a random value where it is equals to 0.
 781          *
 782          * @see bug 3946
 783          */
 784         protected function doPageRandomUpdate() {
 785                 $page = $this->db->tableName( 'page' );
 786                 $this->db->query( "UPDATE $page SET page_random = RAND() WHERE page_random = 0", __METHOD__ );
 787                 $rows = $this->db->affectedRows();
 788
 789                 if ( $rows ) {
 790                         $this->output( "Set page_random to a random value on $rows rows where it was set to 0\n" );
 791                 } else {
 792                         $this->output( "...no page_random rows needed to be set\n" );
 793                 }
 794         }
 795
 796         protected function doTemplatelinksUpdate() {
 797                 if ( $this->db->tableExists( 'templatelinks', __METHOD__ ) ) {
 798                         $this->output( "...templatelinks table already exists\n" );
 799
 800                         return;
 801                 }
 802
 803                 $this->applyPatch( 'patch-templatelinks.sql', false, "Creating templatelinks table" );
 804
 805                 $this->output( "Populating...\n" );
 806                 if ( wfGetLB()->getServerCount() > 1 ) {
 807                         // Slow, replication-friendly update
 808                         $res = $this->db->select( 'pagelinks', array( 'pl_from', 'pl_namespace', 'pl_title' ),
 809                                 array( 'pl_namespace' => NS_TEMPLATE ), __METHOD__ );
 810                         $count = 0;
 811                         foreach ( $res as $row ) {
 812                                 $count = ( $count + 1 ) % 100;
 813                                 if ( $count == 0 ) {
 814                                         wfWaitForSlaves();
 815                                 }
 816                                 $this->db->insert( 'templatelinks',
 817                                         array(
 818                                                 'tl_from' => $row->pl_from,
 819                                                 'tl_namespace' => $row->pl_namespace,
 820                                                 'tl_title' => $row->pl_title,
 821                                         ), __METHOD__
 822                                 );
 823                         }
 824                 } else {
 825                         // Fast update
 826                         $this->db->insertSelect( 'templatelinks', 'pagelinks',
 827                                 array(
 828                                         'tl_from' => 'pl_from',
 829                                         'tl_namespace' => 'pl_namespace',
 830                                         'tl_title' => 'pl_title'
 831                                 ), array(
 832                                         'pl_namespace' => 10
 833                                 ), __METHOD__
 834                         );
 835                 }
 836                 $this->output( "Done. Please run maintenance/refreshLinks.php for a more " .
 837                         "thorough templatelinks update.\n" );
 838         }
 839
 840         protected function doBacklinkingIndicesUpdate() {
 841                 if ( !$this->indexHasField( 'pagelinks', 'pl_namespace', 'pl_from' ) ||
 842                         !$this->indexHasField( 'templatelinks', 'tl_namespace', 'tl_from' ) ||
 843                         !$this->indexHasField( 'imagelinks', 'il_to', 'il_from' )
 844                 ) {
 845                         $this->applyPatch( 'patch-backlinkindexes.sql', false, "Updating backlinking indices" );
 846                 }
 847         }
 848
 849         /**
 850          * Adding page_restrictions table, obsoleting page.page_restrictions.
 851          * Migrating old restrictions to new table
 852          * -- Andrew Garrett, January 2007.
 853          */
 854         protected function doRestrictionsUpdate() {
 855                 if ( $this->db->tableExists( 'page_restrictions', __METHOD__ ) ) {
 856                         $this->output( "...page_restrictions table already exists.\n" );
 857
 858                         return;
 859                 }
 860
 861                 $this->applyPatch(
 862                         'patch-page_restrictions.sql',
 863                         false,
 864                         'Creating page_restrictions table (1/2)'
 865                 );
 866                 $this->applyPatch(
 867                         'patch-page_restrictions_sortkey.sql',
 868                         false,
 869                         'Creating page_restrictions table (2/2)'
 870                 );
 871                 $this->output( "done.\n" );
 872
 873                 $this->output( "Migrating old restrictions to new table...\n" );
 874                 $task = $this->maintenance->runChild( 'UpdateRestrictions' );
 875                 $task->execute();
 876         }
 877
 878         protected function doCategorylinksIndicesUpdate() {
 879                 if ( !$this->indexHasField( 'categorylinks', 'cl_sortkey', 'cl_from' ) ) {
 880                         $this->applyPatch( 'patch-categorylinksindex.sql', false, "Updating categorylinks Indices" );
 881                 }
 882         }
 883
 884         protected function doCategoryPopulation() {
 885                 if ( $this->updateRowExists( 'populate category' ) ) {
 886                         $this->output( "...category table already populated.\n" );
 887
 888                         return;
 889                 }
 890
 891                 $this->output(
 892                         "Populating category table, printing progress markers. " .
 893                         "For large databases, you\n" .
 894                         "may want to hit Ctrl-C and do this manually with maintenance/\n" .
 895                         "populateCategory.php.\n"
 896                 );
 897                 $task = $this->maintenance->runChild( 'PopulateCategory' );
 898                 $task->execute();
 899                 $this->output( "Done populating category table.\n" );
 900         }
 901
 902         protected function doPopulateParentId() {
 903                 if ( !$this->updateRowExists( 'populate rev_parent_id' ) ) {
 904                         $this->output(
 905                                 "Populating rev_parent_id fields, printing progress markers. For large\n" .
 906                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 907                                 "maintenance/populateParentId.php.\n" );
 908
 909                         $task = $this->maintenance->runChild( 'PopulateParentId' );
 910                         $task->execute();
 911                 }
 912         }
 913
 914         protected function doEnableProfiling() {
 915                 global $wgProfileToDatabase;
 916
 917                 if ( !$this->doTable( 'profiling' ) ) {
 918                         return true;
 919                 }
 920
 921                 if ( $wgProfileToDatabase === true && !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 922                         $this->applyPatch( 'patch-profiling.sql', false, 'Add profiling table' );
 923                 }
 924         }
 925
 926         protected function doMaybeProfilingMemoryUpdate() {
 927                 if ( !$this->doTable( 'profiling' ) ) {
 928                         return true;
 929                 }
 930
 931                 if ( !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 932                         return true;
 933                 } elseif ( $this->db->fieldExists( 'profiling', 'pf_memory', __METHOD__ ) ) {
 934                         $this->output( "...profiling table has pf_memory field.\n" );
 935
 936                         return true;
 937                 }
 938
 939                 return $this->applyPatch(
 940                         'patch-profiling-memory.sql',
 941                         false,
 942                         'Adding pf_memory field to table profiling'
 943                 );
 944         }
 945
 946         protected function doFilearchiveIndicesUpdate() {
 947                 $info = $this->db->indexInfo( 'filearchive', 'fa_user_timestamp', __METHOD__ );
 948                 if ( !$info ) {
 949                         $this->applyPatch( 'patch-filearchive-user-index.sql', false, "Updating filearchive indices" );
 950                 }
 951
 952                 return true;
 953         }
 954
 955         protected function doUniquePlTlIl() {
 956                 $info = $this->db->indexInfo( 'pagelinks', 'pl_namespace' );
 957                 if ( is_array( $info ) && !$info[0]->Non_unique ) {
 958                         $this->output( "...pl_namespace, tl_namespace, il_to indices are already UNIQUE.\n" );
 959
 960                         return true;
 961                 }
 962                 if ( $this->skipSchema ) {
 963                         $this->output( "...skipping schema change (making pl_namespace, tl_namespace " .
 964                                 "and il_to indices UNIQUE).\n" );
 965
 966                         return false;
 967                 }
 968
 969                 return $this->applyPatch(
 970                         'patch-pl-tl-il-unique.sql',
 971                         false,
 972                         'Making pl_namespace, tl_namespace and il_to indices UNIQUE'
 973                 );
 974         }
 975
 976         protected function doUpdateMimeMinorField() {
 977                 if ( $this->updateRowExists( 'mime_minor_length' ) ) {
 978                         $this->output( "...*_mime_minor fields are already long enough.\n" );
 979
 980                         return;
 981                 }
 982
 983                 $this->applyPatch(
 984                         'patch-mime_minor_length.sql',
 985                         false,
 986                         'Altering all *_mime_minor fields to 100 bytes in size'
 987                 );
 988         }
 989
 990         protected function doClFieldsUpdate() {
 991                 if ( $this->updateRowExists( 'cl_fields_update' ) ) {
 992                         $this->output( "...categorylinks up-to-date.\n" );
 993
 994                         return;
 995                 }
 996
 997                 $this->applyPatch(
 998                         'patch-categorylinks-better-collation2.sql',
 999                         false,
1000                         'Updating categorylinks (again)'
1001                 );
1002         }
1003
1004         protected function doLangLinksLengthUpdate() {
1005                 $langlinks = $this->db->tableName( 'langlinks' );
1006                 $res = $this->db->query( "SHOW COLUMNS FROM $langlinks LIKE 'll_lang'" );
1007                 $row = $this->db->fetchObject( $res );
1008
1009                 if ( $row && $row->Type == "varbinary(10)" ) {
1010                         $this->applyPatch(
1011                                 'patch-langlinks-ll_lang-20.sql',
1012                                 false,
1013                                 'Updating length of ll_lang in langlinks'
1014                         );
1015                 } else {
1016                         $this->output( "...ll_lang is up-to-date.\n" );
1017                 }
1018         }
1019
1020         protected function doUserNewTalkTimestampNotNull() {
1021                 if ( !$this->doTable( 'user_newtalk' ) ) {
1022                         return true;
1023                 }
1024
1025                 $info = $this->db->fieldInfo( 'user_newtalk', 'user_last_timestamp' );
1026                 if ( $info === false ) {
1027                         return;
1028                 }
1029                 if ( $info->isNullable() ) {
1030                         $this->output( "...user_last_timestamp is already nullable.\n" );
1031
1032                         return;
1033                 }
1034
1035                 $this->applyPatch(
1036                         'patch-user-newtalk-timestamp-null.sql',
1037                         false,
1038                         'Making user_last_timestamp nullable'
1039                 );
1040         }
1041
1042         protected function doIwlinksIndexNonUnique() {
1043                 $info = $this->db->indexInfo( 'iwlinks', 'iwl_prefix_title_from' );
1044                 if ( is_array( $info ) && $info[0]->Non_unique ) {
1045                         $this->output( "...iwl_prefix_title_from index is already non-UNIQUE.\n" );
1046
1047                         return true;
1048                 }
1049                 if ( $this->skipSchema ) {
1050                         $this->output( "...skipping schema change (making iwl_prefix_title_from index non-UNIQUE).\n" );
1051
1052                         return false;
1053                 }
1054
1055                 return $this->applyPatch(
1056                         'patch-iwl_prefix_title_from-non-unique.sql',
1057                         false,
1058                         'Making iwl_prefix_title_from index non-UNIQUE'
1059                 );
1060         }
1061 }