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( 'addField', 'recentchanges', 'rc_type', 'patch-rc_type.sql' ),
  41                         array( 'addIndex', 'recentchanges', 'new_name_timestamp', 'patch-rc-newindex.sql' ),
  42
  43                         // 1.3
  44                         array( 'addField', 'user', 'user_real_name', 'patch-user-realname.sql' ),
  45                         array( 'addTable', 'querycache', 'patch-querycache.sql' ),
  46                         array( 'addTable', 'objectcache', 'patch-objectcache.sql' ),
  47                         array( 'addTable', 'categorylinks', 'patch-categorylinks.sql' ),
  48                         array( 'doOldLinksUpdate' ),
  49                         array( 'doFixAncientImagelinks' ),
  50                         array( 'addField', 'recentchanges', 'rc_ip', 'patch-rc_ip.sql' ),
  51
  52                         // 1.4
  53                         array( 'addIndex', 'image', 'PRIMARY', 'patch-image_name_primary.sql' ),
  54                         array( 'addField', 'recentchanges', 'rc_id', 'patch-rc_id.sql' ),
  55                         array( 'addField', 'recentchanges', 'rc_patrolled', 'patch-rc-patrol.sql' ),
  56                         array( 'addTable', 'logging', 'patch-logging.sql' ),
  57                         array( 'addField', 'user', 'user_token', 'patch-user_token.sql' ),
  58                         array( 'addField', 'watchlist', 'wl_notificationtimestamp', 'patch-email-notification.sql' ),
  59                         array( 'doWatchlistUpdate' ),
  60                         array( 'dropField', 'user', 'user_emailauthenticationtimestamp',
  61                                 'patch-email-authentication.sql' ),
  62
  63                         // 1.5
  64                         array( 'doSchemaRestructuring' ),
  65                         array( 'addField', 'logging', 'log_params', 'patch-log_params.sql' ),
  66                         array( 'checkBin', 'logging', 'log_title', 'patch-logging-title.sql', ),
  67                         array( 'addField', 'archive', 'ar_rev_id', 'patch-archive-rev_id.sql' ),
  68                         array( 'addField', 'page', 'page_len', 'patch-page_len.sql' ),
  69                         array( 'dropField', 'revision', 'inverse_timestamp', 'patch-inverse_timestamp.sql' ),
  70                         array( 'addField', 'revision', 'rev_text_id', 'patch-rev_text_id.sql' ),
  71                         array( 'addField', 'revision', 'rev_deleted', 'patch-rev_deleted.sql' ),
  72                         array( 'addField', 'image', 'img_width', 'patch-img_width.sql' ),
  73                         array( 'addField', 'image', 'img_metadata', 'patch-img_metadata.sql' ),
  74                         array( 'addField', 'user', 'user_email_token', 'patch-user_email_token.sql' ),
  75                         array( 'addField', 'archive', 'ar_text_id', 'patch-archive-text_id.sql' ),
  76                         array( 'doNamespaceSize' ),
  77                         array( 'addField', 'image', 'img_media_type', 'patch-img_media_type.sql' ),
  78                         array( 'doPagelinksUpdate' ),
  79                         array( 'dropField', 'image', 'img_type', 'patch-drop_img_type.sql' ),
  80                         array( 'doUserUniqueUpdate' ),
  81                         array( 'doUserGroupsUpdate' ),
  82                         array( 'addField', 'site_stats', 'ss_total_pages', 'patch-ss_total_articles.sql' ),
  83                         array( 'addTable', 'user_newtalk', 'patch-usernewtalk2.sql' ),
  84                         array( 'addTable', 'transcache', 'patch-transcache.sql' ),
  85                         array( 'addField', 'interwiki', 'iw_trans', 'patch-interwiki-trans.sql' ),
  86
  87                         // 1.6
  88                         array( 'doWatchlistNull' ),
  89                         array( 'addIndex', 'logging', 'times', 'patch-logging-times-index.sql' ),
  90                         array( 'addField', 'ipblocks', 'ipb_range_start', 'patch-ipb_range_start.sql' ),
  91                         array( 'doPageRandomUpdate' ),
  92                         array( 'addField', 'user', 'user_registration', 'patch-user_registration.sql' ),
  93                         array( 'doTemplatelinksUpdate' ),
  94                         array( 'addTable', 'externallinks', 'patch-externallinks.sql' ),
  95                         array( 'addTable', 'job', 'patch-job.sql' ),
  96                         array( 'addField', 'site_stats', 'ss_images', 'patch-ss_images.sql' ),
  97                         array( 'addTable', 'langlinks', 'patch-langlinks.sql' ),
  98                         array( 'addTable', 'querycache_info', 'patch-querycacheinfo.sql' ),
  99                         array( 'addTable', 'filearchive', 'patch-filearchive.sql' ),
 100                         array( 'addField', 'ipblocks', 'ipb_anon_only', 'patch-ipb_anon_only.sql' ),
 101                         array( 'addIndex', 'recentchanges', 'rc_ns_usertext', 'patch-recentchanges-utindex.sql' ),
 102                         array( 'addIndex', 'recentchanges', 'rc_user_text', 'patch-rc_user_text-index.sql' ),
 103
 104                         // 1.9
 105                         array( 'addField', 'user', 'user_newpass_time', 'patch-user_newpass_time.sql' ),
 106                         array( 'addTable', 'redirect', 'patch-redirect.sql' ),
 107                         array( 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ),
 108                         array( 'addField', 'ipblocks', 'ipb_enable_autoblock', 'patch-ipb_optional_autoblock.sql' ),
 109                         array( 'doBacklinkingIndicesUpdate' ),
 110                         array( 'addField', 'recentchanges', 'rc_old_len', 'patch-rc_len.sql' ),
 111                         array( 'addField', 'user', 'user_editcount', 'patch-user_editcount.sql' ),
 112
 113                         // 1.10
 114                         array( 'doRestrictionsUpdate' ),
 115                         array( 'addField', 'logging', 'log_id', 'patch-log_id.sql' ),
 116                         array( 'addField', 'revision', 'rev_parent_id', 'patch-rev_parent_id.sql' ),
 117                         array( 'addField', 'page_restrictions', 'pr_id', 'patch-page_restrictions_sortkey.sql' ),
 118                         array( 'addField', 'revision', 'rev_len', 'patch-rev_len.sql' ),
 119                         array( 'addField', 'recentchanges', 'rc_deleted', 'patch-rc_deleted.sql' ),
 120                         array( 'addField', 'logging', 'log_deleted', 'patch-log_deleted.sql' ),
 121                         array( 'addField', 'archive', 'ar_deleted', 'patch-ar_deleted.sql' ),
 122                         array( 'addField', 'ipblocks', 'ipb_deleted', 'patch-ipb_deleted.sql' ),
 123                         array( 'addField', 'filearchive', 'fa_deleted', 'patch-fa_deleted.sql' ),
 124                         array( 'addField', 'archive', 'ar_len', 'patch-ar_len.sql' ),
 125
 126                         // 1.11
 127                         array( 'addField', 'ipblocks', 'ipb_block_email', 'patch-ipb_emailban.sql' ),
 128                         array( 'doCategorylinksIndicesUpdate' ),
 129                         array( 'addField', 'oldimage', 'oi_metadata', 'patch-oi_metadata.sql' ),
 130                         array( 'addIndex', 'archive', 'usertext_timestamp', 'patch-archive-user-index.sql' ),
 131                         array( 'addIndex', 'image', 'img_usertext_timestamp', 'patch-image-user-index.sql' ),
 132                         array( 'addIndex', 'oldimage', 'oi_usertext_timestamp', 'patch-oldimage-user-index.sql' ),
 133                         array( 'addField', 'archive', 'ar_page_id', 'patch-archive-page_id.sql' ),
 134                         array( 'addField', 'image', 'img_sha1', 'patch-img_sha1.sql' ),
 135
 136                         // 1.12
 137                         array( 'addTable', 'protected_titles', 'patch-protected_titles.sql' ),
 138
 139                         // 1.13
 140                         array( 'addField', 'ipblocks', 'ipb_by_text', 'patch-ipb_by_text.sql' ),
 141                         array( 'addTable', 'page_props', 'patch-page_props.sql' ),
 142                         array( 'addTable', 'updatelog', 'patch-updatelog.sql' ),
 143                         array( 'addTable', 'category', 'patch-category.sql' ),
 144                         array( 'doCategoryPopulation' ),
 145                         array( 'addField', 'archive', 'ar_parent_id', 'patch-ar_parent_id.sql' ),
 146                         array( 'addField', 'user_newtalk', 'user_last_timestamp', 'patch-user_last_timestamp.sql' ),
 147                         array( 'doPopulateParentId' ),
 148                         array( 'checkBin', 'protected_titles', 'pt_title', 'patch-pt_title-encoding.sql', ),
 149                         array( 'doMaybeProfilingMemoryUpdate' ),
 150                         array( 'doFilearchiveIndicesUpdate' ),
 151
 152                         // 1.14
 153                         array( 'addField', 'site_stats', 'ss_active_users', 'patch-ss_active_users.sql' ),
 154                         array( 'doActiveUsersInit' ),
 155                         array( 'addField', 'ipblocks', 'ipb_allow_usertalk', 'patch-ipb_allow_usertalk.sql' ),
 156
 157                         // 1.15
 158                         array( 'doUniquePlTlIl' ),
 159                         array( 'addTable', 'change_tag', 'patch-change_tag.sql' ),
 160                         array( 'addTable', 'tag_summary', 'patch-tag_summary.sql' ),
 161                         array( 'addTable', 'valid_tag', 'patch-valid_tag.sql' ),
 162
 163                         // 1.16
 164                         array( 'addTable', 'user_properties', 'patch-user_properties.sql' ),
 165                         array( 'addTable', 'log_search', 'patch-log_search.sql' ),
 166                         array( 'addField', 'logging', 'log_user_text', 'patch-log_user_text.sql' ),
 167                         # listed separately from the previous update because 1.16 was released without this update
 168                         array( 'doLogUsertextPopulation' ),
 169                         array( 'doLogSearchPopulation' ),
 170                         array( 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ),
 171                         array( 'addIndex', 'log_search', 'ls_field_val', 'patch-log_search-rename-index.sql' ),
 172                         array( 'addIndex', 'change_tag', 'change_tag_rc_tag', 'patch-change_tag-indexes.sql' ),
 173                         array( 'addField', 'redirect', 'rd_interwiki', 'patch-rd_interwiki.sql' ),
 174                         array( 'doUpdateTranscacheField' ),
 175                         array( 'doUpdateMimeMinorField' ),
 176
 177                         // 1.17
 178                         array( 'addTable', 'iwlinks', 'patch-iwlinks.sql' ),
 179                         array( 'addIndex', 'iwlinks', 'iwl_prefix_title_from', 'patch-rename-iwl_prefix.sql' ),
 180                         array( 'addField', 'updatelog', 'ul_value', 'patch-ul_value.sql' ),
 181                         array( 'addField', 'interwiki', 'iw_api', 'patch-iw_api_and_wikiid.sql' ),
 182                         array( 'dropIndex', 'iwlinks', 'iwl_prefix', 'patch-kill-iwl_prefix.sql' ),
 183                         array( 'addField', 'categorylinks', 'cl_collation', 'patch-categorylinks-better-collation.sql' ),
 184                         array( 'doClFieldsUpdate' ),
 185                         array( 'doCollationUpdate' ),
 186                         array( 'addTable', 'msg_resource', 'patch-msg_resource.sql' ),
 187                         array( 'addTable', 'module_deps', 'patch-module_deps.sql' ),
 188                         array( 'dropIndex', 'archive', 'ar_page_revid', 'patch-archive_kill_ar_page_revid.sql' ),
 189                         array( 'addIndex', 'archive', 'ar_revid', 'patch-archive_ar_revid.sql' ),
 190                         array( 'doLangLinksLengthUpdate' ),
 191
 192                         // 1.18
 193                         array( 'doUserNewTalkTimestampNotNull' ),
 194                         array( 'addIndex', 'user', 'user_email', 'patch-user_email_index.sql' ),
 195                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
 196                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
 197                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
 198
 199                         // 1.19
 200                         array( 'addIndex', 'logging', 'type_action', 'patch-logging-type-action-index.sql' ),
 201                         array( 'addField', 'revision', 'rev_sha1', 'patch-rev_sha1.sql' ),
 202                         array( 'doMigrateUserOptions' ),
 203                         array( 'dropField', 'user', 'user_options', 'patch-drop-user_options.sql' ),
 204                         array( 'addField', 'archive', 'ar_sha1', 'patch-ar_sha1.sql' ),
 205                         array( 'addIndex', 'page', 'page_redirect_namespace_len',
 206                                 'patch-page_redirect_namespace_len.sql' ),
 207                         array( 'addField', 'uploadstash', 'us_chunk_inx', 'patch-uploadstash_chunk.sql' ),
 208                         array( 'addfield', 'job', 'job_timestamp', 'patch-jobs-add-timestamp.sql' ),
 209
 210                         // 1.20
 211                         array( 'addIndex', 'revision', 'page_user_timestamp', 'patch-revision-user-page-index.sql' ),
 212                         array( 'addField', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id.sql' ),
 213                         array( 'addIndex', 'ipblocks', 'ipb_parent_block_id', 'patch-ipb-parent-block-id-index.sql' ),
 214                         array( 'dropField', 'category', 'cat_hidden', 'patch-cat_hidden.sql' ),
 215
 216                         // 1.21
 217                         array( 'addField', 'revision', 'rev_content_format', 'patch-revision-rev_content_format.sql' ),
 218                         array( 'addField', 'revision', 'rev_content_model', 'patch-revision-rev_content_model.sql' ),
 219                         array( 'addField', 'archive', 'ar_content_format', 'patch-archive-ar_content_format.sql' ),
 220                         array( 'addField', 'archive', 'ar_content_model', 'patch-archive-ar_content_model.sql' ),
 221                         array( 'addField', 'page', 'page_content_model', 'patch-page-page_content_model.sql' ),
 222                         array( 'enableContentHandlerUseDB' ),
 223                         array( 'dropField', 'site_stats', 'ss_admins', 'patch-drop-ss_admins.sql' ),
 224                         array( 'dropField', 'recentchanges', 'rc_moved_to_title', 'patch-rc_moved.sql' ),
 225                         array( 'addTable', 'sites', 'patch-sites.sql' ),
 226                         array( 'addField', 'filearchive', 'fa_sha1', 'patch-fa_sha1.sql' ),
 227                         array( 'addField', 'job', 'job_token', 'patch-job_token.sql' ),
 228                         array( 'addField', 'job', 'job_attempts', 'patch-job_attempts.sql' ),
 229                         array( 'doEnableProfiling' ),
 230                         array( 'addField', 'uploadstash', 'us_props', 'patch-uploadstash-us_props.sql' ),
 231                         array( 'modifyField', 'user_groups', 'ug_group', 'patch-ug_group-length-increase-255.sql' ),
 232                         array( 'modifyField', 'user_former_groups', 'ufg_group',
 233                                 'patch-ufg_group-length-increase-255.sql' ),
 234                         array( 'addIndex', 'page_props', 'pp_propname_page',
 235                                 'patch-page_props-propname-page-index.sql' ),
 236                         array( 'addIndex', 'image', 'img_media_mime', 'patch-img_media_mime-index.sql' ),
 237
 238                         // 1.22
 239                         array( 'doIwlinksIndexNonUnique' ),
 240                         array( 'addIndex', 'iwlinks', 'iwl_prefix_from_title',
 241                                 'patch-iwlinks-from-title-index.sql' ),
 242                         array( 'addField', 'archive', 'ar_id', 'patch-archive-ar_id.sql' ),
 243                         array( 'addField', 'externallinks', 'el_id', 'patch-externallinks-el_id.sql' ),
 244
 245                         // 1.23
 246                         array( 'addField', 'recentchanges', 'rc_source', 'patch-rc_source.sql' ),
 247                         array( 'addIndex', 'logging', 'log_user_text_type_time',
 248                                 'patch-logging_user_text_type_time_index.sql' ),
 249                         array( 'addIndex', 'logging', 'log_user_text_time', 'patch-logging_user_text_time_index.sql' ),
 250                         array( 'addField', 'page', 'page_links_updated', 'patch-page_links_updated.sql' ),
 251                         array( 'addField', 'user', 'user_password_expires', 'patch-user_password_expire.sql' ),
 252
 253                         // 1.24
 254                         array( 'addField', 'page_props', 'pp_sortkey', 'patch-pp_sortkey.sql' ),
 255                         array( 'dropField', 'recentchanges', 'rc_cur_time', 'patch-drop-rc_cur_time.sql' ),
 256                         array( 'addIndex', 'watchlist', 'wl_user_notificationtimestamp',
 257                                 'patch-watchlist-user-notificationtimestamp-index.sql' ),
 258                         array( 'addField', 'page', 'page_lang', 'patch-page_lang.sql' ),
 259                         array( 'addField', 'pagelinks', 'pl_from_namespace', 'patch-pl_from_namespace.sql' ),
 260                         array( 'addField', 'templatelinks', 'tl_from_namespace', 'patch-tl_from_namespace.sql' ),
 261                         array( 'addField', 'imagelinks', 'il_from_namespace', 'patch-il_from_namespace.sql' ),
 262                         array( 'modifyField', 'image', 'img_major_mime',
 263                                 'patch-img_major_mime-chemical.sql' ),
 264                         array( 'modifyField', 'oldimage', 'oi_major_mime',
 265                                 'patch-oi_major_mime-chemical.sql' ),
 266                         array( 'modifyField', 'filearchive', 'fa_major_mime',
 267                                 'patch-fa_major_mime-chemical.sql' ),
 268
 269                         // 1.25
 270                         array( 'dropTable', 'hitcounter' ),
 271                         array( 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ),
 272                         array( 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ),
 273                 );
 274         }
 275
 276         /**
 277          * 1.4 betas were missing the 'binary' marker from logging.log_title,
 278          * which causes a collation mismatch error on joins in MySQL 4.1.
 279          *
 280          * @param string $table Table name
 281          * @param string $field Field name to check
 282          * @param string $patchFile Path to the patch to correct the field
 283          * @return bool
 284          */
 285         protected function checkBin( $table, $field, $patchFile ) {
 286                 if ( !$this->doTable( $table ) ) {
 287                         return true;
 288                 }
 289
 290                 /** @var MySQLField $fieldInfo */
 291                 $fieldInfo = $this->db->fieldInfo( $table, $field );
 292                 if ( $fieldInfo->isBinary() ) {
 293                         $this->output( "...$table table has correct $field encoding.\n" );
 294                 } else {
 295                         $this->applyPatch( $patchFile, false, "Fixing $field encoding on $table table" );
 296                 }
 297         }
 298
 299         /**
 300          * Check whether an index contain a field
 301          *
 302          * @param string $table Table name
 303          * @param string $index Index name to check
 304          * @param string $field Field that should be in the index
 305          * @return bool
 306          */
 307         protected function indexHasField( $table, $index, $field ) {
 308                 if ( !$this->doTable( $table ) ) {
 309                         return true;
 310                 }
 311
 312                 $info = $this->db->indexInfo( $table, $index, __METHOD__ );
 313                 if ( $info ) {
 314                         foreach ( $info as $row ) {
 315                                 if ( $row->Column_name == $field ) {
 316                                         $this->output( "...index $index on table $table includes field $field.\n" );
 317
 318                                         return true;
 319                                 }
 320                         }
 321                 }
 322                 $this->output( "...index $index on table $table has no field $field; added.\n" );
 323
 324                 return false;
 325         }
 326
 327         /**
 328          * Check that interwiki table exists; if it doesn't source it
 329          */
 330         protected function doInterwikiUpdate() {
 331                 global $IP;
 332
 333                 if ( !$this->doTable( 'interwiki' ) ) {
 334                         return true;
 335                 }
 336
 337                 if ( $this->db->tableExists( "interwiki", __METHOD__ ) ) {
 338                         $this->output( "...already have interwiki table\n" );
 339
 340                         return;
 341                 }
 342
 343                 $this->applyPatch( 'patch-interwiki.sql', false, 'Creating interwiki table' );
 344                 $this->applyPatch(
 345                         "$IP/maintenance/interwiki.sql",
 346                         true,
 347                         'Adding default interwiki definitions'
 348                 );
 349         }
 350
 351         /**
 352          * Check that proper indexes are in place
 353          */
 354         protected function doIndexUpdate() {
 355                 $meta = $this->db->fieldInfo( 'recentchanges', 'rc_timestamp' );
 356                 if ( $meta === false ) {
 357                         throw new MWException( 'Missing rc_timestamp field of recentchanges table. Should not happen.' );
 358                 }
 359                 if ( $meta->isMultipleKey() ) {
 360                         $this->output( "...indexes seem up to 20031107 standards.\n" );
 361
 362                         return;
 363                 }
 364
 365                 $this->applyPatch( 'patch-indexes.sql', true, "Updating indexes to 20031107" );
 366         }
 367
 368         protected function doOldLinksUpdate() {
 369                 $cl = $this->maintenance->runChild( 'ConvertLinks' );
 370                 $cl->execute();
 371         }
 372
 373         protected function doFixAncientImagelinks() {
 374                 $info = $this->db->fieldInfo( 'imagelinks', 'il_from' );
 375                 if ( !$info || $info->type() !== 'string' ) {
 376                         $this->output( "...il_from OK\n" );
 377
 378                         return;
 379                 }
 380
 381                 $applied = $this->applyPatch(
 382                         'patch-fix-il_from.sql',
 383                         false,
 384                         'Fixing ancient broken imagelinks table.'
 385                 );
 386
 387                 if ( $applied ) {
 388                         $this->output( "NOTE: you will have to run maintenance/refreshLinks.php after this." );
 389                 }
 390         }
 391
 392         /**
 393          * Check if we need to add talk page rows to the watchlist
 394          */
 395         function doWatchlistUpdate() {
 396                 $talk = $this->db->selectField( 'watchlist', 'count(*)', 'wl_namespace & 1', __METHOD__ );
 397                 $nontalk = $this->db->selectField(
 398                         'watchlist',
 399                         'count(*)',
 400                         'NOT (wl_namespace & 1)',
 401                         __METHOD__
 402                 );
 403                 if ( $talk == $nontalk ) {
 404                         $this->output( "...watchlist talk page rows already present.\n" );
 405
 406                         return;
 407                 }
 408
 409                 $this->output( "Adding missing watchlist talk page rows... " );
 410                 $this->db->insertSelect( 'watchlist', 'watchlist',
 411                         array(
 412                                 'wl_user' => 'wl_user',
 413                                 'wl_namespace' => 'wl_namespace | 1',
 414                                 'wl_title' => 'wl_title',
 415                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 416                         ), array( 'NOT (wl_namespace & 1)' ), __METHOD__, 'IGNORE' );
 417                 $this->output( "done.\n" );
 418
 419                 $this->output( "Adding missing watchlist subject page rows... " );
 420                 $this->db->insertSelect( 'watchlist', 'watchlist',
 421                         array(
 422                                 'wl_user' => 'wl_user',
 423                                 'wl_namespace' => 'wl_namespace & ~1',
 424                                 'wl_title' => 'wl_title',
 425                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 426                         ), array( 'wl_namespace & 1' ), __METHOD__, 'IGNORE' );
 427                 $this->output( "done.\n" );
 428         }
 429
 430         function doSchemaRestructuring() {
 431                 if ( $this->db->tableExists( 'page', __METHOD__ ) ) {
 432                         $this->output( "...page table already exists.\n" );
 433
 434                         return;
 435                 }
 436
 437                 $this->output( "...converting from cur/old to page/revision/text DB structure.\n" );
 438                 $this->output( wfTimestamp( TS_DB ) );
 439                 $this->output( "......checking for duplicate entries.\n" );
 440
 441                 list( $cur, $old, $page, $revision, $text ) = $this->db->tableNamesN(
 442                         'cur',
 443                         'old',
 444                         'page',
 445                         'revision',
 446                         'text'
 447                 );
 448
 449                 $rows = $this->db->query( "
 450                         SELECT cur_title, cur_namespace, COUNT(cur_namespace) AS c
 451                         FROM $cur
 452                         GROUP BY cur_title, cur_namespace
 453                         HAVING c>1",
 454                         __METHOD__
 455                 );
 456
 457                 if ( $rows->numRows() > 0 ) {
 458                         $this->output( wfTimestamp( TS_DB ) );
 459                         $this->output( "......<b>Found duplicate entries</b>\n" );
 460                         $this->output( sprintf( "<b>      %-60s %3s %5s</b>\n", 'Title', 'NS', 'Count' ) );
 461                         $duplicate = array();
 462                         foreach ( $rows as $row ) {
 463                                 if ( !isset( $duplicate[$row->cur_namespace] ) ) {
 464                                         $duplicate[$row->cur_namespace] = array();
 465                                 }
 466
 467                                 $duplicate[$row->cur_namespace][] = $row->cur_title;
 468                                 $this->output( sprintf(
 469                                         "      %-60s %3s %5s\n",
 470                                         $row->cur_title, $row->cur_namespace,
 471                                         $row->c
 472                                 ) );
 473                         }
 474                         $sql = "SELECT cur_title, cur_namespace, cur_id, cur_timestamp FROM $cur WHERE ";
 475                         $firstCond = true;
 476                         foreach ( $duplicate as $ns => $titles ) {
 477                                 if ( $firstCond ) {
 478                                         $firstCond = false;
 479                                 } else {
 480                                         $sql .= ' OR ';
 481                                 }
 482                                 $sql .= "( cur_namespace = {$ns} AND cur_title in (";
 483                                 $first = true;
 484                                 foreach ( $titles as $t ) {
 485                                         if ( $first ) {
 486                                                 $sql .= $this->db->addQuotes( $t );
 487                                                 $first = false;
 488                                         } else {
 489                                                 $sql .= ', ' . $this->db->addQuotes( $t );
 490                                         }
 491                                 }
 492                                 $sql .= ") ) \n";
 493                         }
 494                         # By sorting descending, the most recent entry will be the first in the list.
 495                         # All following entries will be deleted by the next while-loop.
 496                         $sql .= 'ORDER BY cur_namespace, cur_title, cur_timestamp DESC';
 497
 498                         $rows = $this->db->query( $sql, __METHOD__ );
 499
 500                         $prev_title = $prev_namespace = false;
 501                         $deleteId = array();
 502
 503                         foreach ( $rows as $row ) {
 504                                 if ( $prev_title == $row->cur_title && $prev_namespace == $row->cur_namespace ) {
 505                                         $deleteId[] = $row->cur_id;
 506                                 }
 507                                 $prev_title = $row->cur_title;
 508                                 $prev_namespace = $row->cur_namespace;
 509                         }
 510                         $sql = "DELETE FROM $cur WHERE cur_id IN ( " . join( ',', $deleteId ) . ')';
 511                         $this->db->query( $sql, __METHOD__ );
 512                         $this->output( wfTimestamp( TS_DB ) );
 513                         $this->output( "......<b>Deleted</b> " . $this->db->affectedRows() . " records.\n" );
 514                 }
 515
 516                 $this->output( wfTimestamp( TS_DB ) );
 517                 $this->output( "......Creating tables.\n" );
 518                 $this->db->query( "CREATE TABLE $page (
 519                         page_id int(8) unsigned NOT NULL auto_increment,
 520                         page_namespace int NOT NULL,
 521                         page_title varchar(255) binary NOT NULL,
 522                         page_restrictions tinyblob NOT NULL,
 523                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 524                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 525                         page_random real unsigned NOT NULL,
 526                         page_touched char(14) binary NOT NULL default '',
 527                         page_latest int(8) unsigned NOT NULL,
 528                         page_len int(8) unsigned NOT NULL,
 529
 530                         PRIMARY KEY page_id (page_id),
 531                         UNIQUE INDEX name_title (page_namespace,page_title),
 532                         INDEX (page_random),
 533                         INDEX (page_len)
 534                         ) ENGINE=InnoDB", __METHOD__ );
 535                 $this->db->query( "CREATE TABLE $revision (
 536                         rev_id int(8) unsigned NOT NULL auto_increment,
 537                         rev_page int(8) unsigned NOT NULL,
 538                         rev_comment tinyblob NOT NULL,
 539                         rev_user int(5) unsigned NOT NULL default '0',
 540                         rev_user_text varchar(255) binary NOT NULL default '',
 541                         rev_timestamp char(14) binary NOT NULL default '',
 542                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 543                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 544                         rev_len int(8) unsigned,
 545                         rev_parent_id int(8) unsigned default NULL,
 546                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 547                         UNIQUE INDEX rev_id (rev_id),
 548                         INDEX rev_timestamp (rev_timestamp),
 549                         INDEX page_timestamp (rev_page,rev_timestamp),
 550                         INDEX user_timestamp (rev_user,rev_timestamp),
 551                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 552                         ) ENGINE=InnoDB", __METHOD__ );
 553
 554                 $this->output( wfTimestamp( TS_DB ) );
 555                 $this->output( "......Locking tables.\n" );
 556                 $this->db->query(
 557                         "LOCK TABLES $page WRITE, $revision WRITE, $old WRITE, $cur WRITE",
 558                         __METHOD__
 559                 );
 560
 561                 $maxold = intval( $this->db->selectField( 'old', 'max(old_id)', '', __METHOD__ ) );
 562                 $this->output( wfTimestamp( TS_DB ) );
 563                 $this->output( "......maxold is {$maxold}\n" );
 564
 565                 $this->output( wfTimestamp( TS_DB ) );
 566                 global $wgLegacySchemaConversion;
 567                 if ( $wgLegacySchemaConversion ) {
 568                         // Create HistoryBlobCurStub entries.
 569                         // Text will be pulled from the leftover 'cur' table at runtime.
 570                         $this->output( "......Moving metadata from cur; using blob references to text in cur table.\n" );
 571                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 572                         $cur_flags = "'object'";
 573                 } else {
 574                         // Copy all cur text in immediately: this may take longer but avoids
 575                         // having to keep an extra table around.
 576                         $this->output( "......Moving text from cur.\n" );
 577                         $cur_text = 'cur_text';
 578                         $cur_flags = "''";
 579                 }
 580                 $this->db->query(
 581                         "INSERT INTO $old (old_namespace, old_title, old_text, old_comment, old_user,
 582                                 old_user_text, old_timestamp, old_minor_edit, old_flags)
 583                         SELECT cur_namespace, cur_title, $cur_text, cur_comment, cur_user, cur_user_text,
 584                                 cur_timestamp, cur_minor_edit, $cur_flags
 585                         FROM $cur",
 586                         __METHOD__
 587                 );
 588
 589                 $this->output( wfTimestamp( TS_DB ) );
 590                 $this->output( "......Setting up revision table.\n" );
 591                 $this->db->query(
 592                         "INSERT INTO $revision (rev_id, rev_page, rev_comment, rev_user,
 593                                 rev_user_text, rev_timestamp, rev_minor_edit)
 594                         SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 595                                 old_timestamp, old_minor_edit
 596                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 597                         __METHOD__
 598                 );
 599
 600                 $this->output( wfTimestamp( TS_DB ) );
 601                 $this->output( "......Setting up page table.\n" );
 602                 $this->db->query(
 603                         "INSERT INTO $page (page_id, page_namespace, page_title,
 604                                 page_restrictions, page_is_redirect, page_is_new, page_random,
 605                                 page_touched, page_latest, page_len)
 606                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions,
 607                                 cur_is_redirect, cur_is_new, cur_random, cur_touched, rev_id, LENGTH(cur_text)
 608                         FROM $cur,$revision
 609                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}",
 610                         __METHOD__
 611                 );
 612
 613                 $this->output( wfTimestamp( TS_DB ) );
 614                 $this->output( "......Unlocking tables.\n" );
 615                 $this->db->query( "UNLOCK TABLES", __METHOD__ );
 616
 617                 $this->output( wfTimestamp( TS_DB ) );
 618                 $this->output( "......Renaming old.\n" );
 619                 $this->db->query( "ALTER TABLE $old RENAME TO $text", __METHOD__ );
 620
 621                 $this->output( wfTimestamp( TS_DB ) );
 622                 $this->output( "...done.\n" );
 623         }
 624
 625         protected function doNamespaceSize() {
 626                 $tables = array(
 627                         'page' => 'page',
 628                         'archive' => 'ar',
 629                         'recentchanges' => 'rc',
 630                         'watchlist' => 'wl',
 631                         'querycache' => 'qc',
 632                         'logging' => 'log',
 633                 );
 634                 foreach ( $tables as $table => $prefix ) {
 635                         $field = $prefix . '_namespace';
 636
 637                         $tablename = $this->db->tableName( $table );
 638                         $result = $this->db->query( "SHOW COLUMNS FROM $tablename LIKE '$field'", __METHOD__ );
 639                         $info = $this->db->fetchObject( $result );
 640
 641                         if ( substr( $info->Type, 0, 3 ) == 'int' ) {
 642                                 $this->output( "...$field is already a full int ($info->Type).\n" );
 643                         } else {
 644                                 $this->output( "Promoting $field from $info->Type to int... " );
 645                                 $this->db->query( "ALTER TABLE $tablename MODIFY $field int NOT NULL", __METHOD__ );
 646                                 $this->output( "done.\n" );
 647                         }
 648                 }
 649         }
 650
 651         protected function doPagelinksUpdate() {
 652                 if ( $this->db->tableExists( 'pagelinks', __METHOD__ ) ) {
 653                         $this->output( "...already have pagelinks table.\n" );
 654
 655                         return;
 656                 }
 657
 658                 $this->applyPatch(
 659                         'patch-pagelinks.sql',
 660                         false,
 661                         'Converting links and brokenlinks tables to pagelinks'
 662                 );
 663
 664                 global $wgContLang;
 665                 foreach ( $wgContLang->getNamespaces() as $ns => $name ) {
 666                         if ( $ns == 0 ) {
 667                                 continue;
 668                         }
 669
 670                         $this->output( "Cleaning up broken links for namespace $ns... " );
 671                         $this->db->update( 'pagelinks',
 672                                 array(
 673                                         'pl_namespace' => $ns,
 674                                         "pl_title = TRIM(LEADING {$this->db->addQuotes( "$name:" )} FROM pl_title)",
 675                                 ),
 676                                 array(
 677                                         'pl_namespace' => 0,
 678                                         'pl_title' . $this->db->buildLike( "$name:", $this->db->anyString() ),
 679                                 ),
 680                                 __METHOD__
 681                         );
 682                         $this->output( "done.\n" );
 683                 }
 684         }
 685
 686         protected function doUserUniqueUpdate() {
 687                 if ( !$this->doTable( 'user' ) ) {
 688                         return true;
 689                 }
 690
 691                 $duper = new UserDupes( $this->db, array( $this, 'output' ) );
 692                 if ( $duper->hasUniqueIndex() ) {
 693                         $this->output( "...already have unique user_name index.\n" );
 694
 695                         return;
 696                 }
 697
 698                 if ( !$duper->clearDupes() ) {
 699                         $this->output( "WARNING: This next step will probably fail due to unfixed duplicates...\n" );
 700                 }
 701                 $this->applyPatch( 'patch-user_nameindex.sql', false, "Adding unique index on user_name" );
 702         }
 703
 704         protected function doUserGroupsUpdate() {
 705                 if ( !$this->doTable( 'user_groups' ) ) {
 706                         return true;
 707                 }
 708
 709                 if ( $this->db->tableExists( 'user_groups', __METHOD__ ) ) {
 710                         $info = $this->db->fieldInfo( 'user_groups', 'ug_group' );
 711                         if ( $info->type() == 'int' ) {
 712                                 $oldug = $this->db->tableName( 'user_groups' );
 713                                 $newug = $this->db->tableName( 'user_groups_bogus' );
 714                                 $this->output( "user_groups table exists but is in bogus intermediate " .
 715                                         "format. Renaming to $newug... " );
 716                                 $this->db->query( "ALTER TABLE $oldug RENAME TO $newug", __METHOD__ );
 717                                 $this->output( "done.\n" );
 718
 719                                 $this->applyPatch( 'patch-user_groups.sql', false, "Re-adding fresh user_groups table" );
 720
 721                                 $this->output( "***\n" );
 722                                 $this->output( "*** WARNING: You will need to manually fix up user " .
 723                                         "permissions in the user_groups\n" );
 724                                 $this->output( "*** table. Old 1.5 alpha versions did some pretty funky stuff...\n" );
 725                                 $this->output( "***\n" );
 726                         } else {
 727                                 $this->output( "...user_groups table exists and is in current format.\n" );
 728                         }
 729
 730                         return;
 731                 }
 732
 733                 $this->applyPatch( 'patch-user_groups.sql', false, "Adding user_groups table" );
 734
 735                 if ( !$this->db->tableExists( 'user_rights', __METHOD__ ) ) {
 736                         if ( $this->db->fieldExists( 'user', 'user_rights', __METHOD__ ) ) {
 737                                 $this->applyPatch(
 738                                         'patch-user_rights.sql',
 739                                         false,
 740                                         'Upgrading from a 1.3 or older database? Breaking out user_rights for conversion'
 741                                 );
 742                         } else {
 743                                 $this->output( "*** WARNING: couldn't locate user_rights table or field for upgrade.\n" );
 744                                 $this->output( "*** You may need to manually configure some sysops by manipulating\n" );
 745                                 $this->output( "*** the user_groups table.\n" );
 746
 747                                 return;
 748                         }
 749                 }
 750
 751                 $this->output( "Converting user_rights table to user_groups... " );
 752                 $result = $this->db->select( 'user_rights',
 753                         array( 'ur_user', 'ur_rights' ),
 754                         array( "ur_rights != ''" ),
 755                         __METHOD__ );
 756
 757                 foreach ( $result as $row ) {
 758                         $groups = array_unique(
 759                                 array_map( 'trim',
 760                                         explode( ',', $row->ur_rights ) ) );
 761
 762                         foreach ( $groups as $group ) {
 763                                 $this->db->insert( 'user_groups',
 764                                         array(
 765                                                 'ug_user' => $row->ur_user,
 766                                                 'ug_group' => $group ),
 767                                         __METHOD__ );
 768                         }
 769                 }
 770                 $this->output( "done.\n" );
 771         }
 772
 773         /**
 774          * Make sure wl_notificationtimestamp can be NULL,
 775          * and update old broken items.
 776          */
 777         protected function doWatchlistNull() {
 778                 $info = $this->db->fieldInfo( 'watchlist', 'wl_notificationtimestamp' );
 779                 if ( !$info ) {
 780                         return;
 781                 }
 782                 if ( $info->isNullable() ) {
 783                         $this->output( "...wl_notificationtimestamp is already nullable.\n" );
 784
 785                         return;
 786                 }
 787
 788                 $this->applyPatch(
 789                         'patch-watchlist-null.sql',
 790                         false,
 791                         'Making wl_notificationtimestamp nullable'
 792                 );
 793         }
 794
 795         /**
 796          * Set page_random field to a random value where it is equals to 0.
 797          *
 798          * @see bug 3946
 799          */
 800         protected function doPageRandomUpdate() {
 801                 $page = $this->db->tableName( 'page' );
 802                 $this->db->query( "UPDATE $page SET page_random = RAND() WHERE page_random = 0", __METHOD__ );
 803                 $rows = $this->db->affectedRows();
 804
 805                 if ( $rows ) {
 806                         $this->output( "Set page_random to a random value on $rows rows where it was set to 0\n" );
 807                 } else {
 808                         $this->output( "...no page_random rows needed to be set\n" );
 809                 }
 810         }
 811
 812         protected function doTemplatelinksUpdate() {
 813                 if ( $this->db->tableExists( 'templatelinks', __METHOD__ ) ) {
 814                         $this->output( "...templatelinks table already exists\n" );
 815
 816                         return;
 817                 }
 818
 819                 $this->applyPatch( 'patch-templatelinks.sql', false, "Creating templatelinks table" );
 820
 821                 $this->output( "Populating...\n" );
 822                 if ( wfGetLB()->getServerCount() > 1 ) {
 823                         // Slow, replication-friendly update
 824                         $res = $this->db->select( 'pagelinks', array( 'pl_from', 'pl_namespace', 'pl_title' ),
 825                                 array( 'pl_namespace' => NS_TEMPLATE ), __METHOD__ );
 826                         $count = 0;
 827                         foreach ( $res as $row ) {
 828                                 $count = ( $count + 1 ) % 100;
 829                                 if ( $count == 0 ) {
 830                                         wfWaitForSlaves();
 831                                 }
 832                                 $this->db->insert( 'templatelinks',
 833                                         array(
 834                                                 'tl_from' => $row->pl_from,
 835                                                 'tl_namespace' => $row->pl_namespace,
 836                                                 'tl_title' => $row->pl_title,
 837                                         ), __METHOD__
 838                                 );
 839                         }
 840                 } else {
 841                         // Fast update
 842                         $this->db->insertSelect( 'templatelinks', 'pagelinks',
 843                                 array(
 844                                         'tl_from' => 'pl_from',
 845                                         'tl_namespace' => 'pl_namespace',
 846                                         'tl_title' => 'pl_title'
 847                                 ), array(
 848                                         'pl_namespace' => 10
 849                                 ), __METHOD__
 850                         );
 851                 }
 852                 $this->output( "Done. Please run maintenance/refreshLinks.php for a more " .
 853                         "thorough templatelinks update.\n" );
 854         }
 855
 856         protected function doBacklinkingIndicesUpdate() {
 857                 if ( !$this->indexHasField( 'pagelinks', 'pl_namespace', 'pl_from' ) ||
 858                         !$this->indexHasField( 'templatelinks', 'tl_namespace', 'tl_from' ) ||
 859                         !$this->indexHasField( 'imagelinks', 'il_to', 'il_from' )
 860                 ) {
 861                         $this->applyPatch( 'patch-backlinkindexes.sql', false, "Updating backlinking indices" );
 862                 }
 863         }
 864
 865         /**
 866          * Adding page_restrictions table, obsoleting page.page_restrictions.
 867          * Migrating old restrictions to new table
 868          * -- Andrew Garrett, January 2007.
 869          */
 870         protected function doRestrictionsUpdate() {
 871                 if ( $this->db->tableExists( 'page_restrictions', __METHOD__ ) ) {
 872                         $this->output( "...page_restrictions table already exists.\n" );
 873
 874                         return;
 875                 }
 876
 877                 $this->applyPatch(
 878                         'patch-page_restrictions.sql',
 879                         false,
 880                         'Creating page_restrictions table (1/2)'
 881                 );
 882                 $this->applyPatch(
 883                         'patch-page_restrictions_sortkey.sql',
 884                         false,
 885                         'Creating page_restrictions table (2/2)'
 886                 );
 887                 $this->output( "done.\n" );
 888
 889                 $this->output( "Migrating old restrictions to new table...\n" );
 890                 $task = $this->maintenance->runChild( 'UpdateRestrictions' );
 891                 $task->execute();
 892         }
 893
 894         protected function doCategorylinksIndicesUpdate() {
 895                 if ( !$this->indexHasField( 'categorylinks', 'cl_sortkey', 'cl_from' ) ) {
 896                         $this->applyPatch( 'patch-categorylinksindex.sql', false, "Updating categorylinks Indices" );
 897                 }
 898         }
 899
 900         protected function doCategoryPopulation() {
 901                 if ( $this->updateRowExists( 'populate category' ) ) {
 902                         $this->output( "...category table already populated.\n" );
 903
 904                         return;
 905                 }
 906
 907                 $this->output(
 908                         "Populating category table, printing progress markers. " .
 909                         "For large databases, you\n" .
 910                         "may want to hit Ctrl-C and do this manually with maintenance/\n" .
 911                         "populateCategory.php.\n"
 912                 );
 913                 $task = $this->maintenance->runChild( 'PopulateCategory' );
 914                 $task->execute();
 915                 $this->output( "Done populating category table.\n" );
 916         }
 917
 918         protected function doPopulateParentId() {
 919                 if ( !$this->updateRowExists( 'populate rev_parent_id' ) ) {
 920                         $this->output(
 921                                 "Populating rev_parent_id fields, printing progress markers. For large\n" .
 922                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 923                                 "maintenance/populateParentId.php.\n" );
 924
 925                         $task = $this->maintenance->runChild( 'PopulateParentId' );
 926                         $task->execute();
 927                 }
 928         }
 929
 930         protected function doMaybeProfilingMemoryUpdate() {
 931                 if ( !$this->doTable( 'profiling' ) ) {
 932                         return true;
 933                 }
 934
 935                 if ( !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 936                         return true;
 937                 } elseif ( $this->db->fieldExists( 'profiling', 'pf_memory', __METHOD__ ) ) {
 938                         $this->output( "...profiling table has pf_memory field.\n" );
 939
 940                         return true;
 941                 }
 942
 943                 return $this->applyPatch(
 944                         'patch-profiling-memory.sql',
 945                         false,
 946                         'Adding pf_memory field to table profiling'
 947                 );
 948         }
 949
 950         protected function doFilearchiveIndicesUpdate() {
 951                 $info = $this->db->indexInfo( 'filearchive', 'fa_user_timestamp', __METHOD__ );
 952                 if ( !$info ) {
 953                         $this->applyPatch( 'patch-filearchive-user-index.sql', false, "Updating filearchive indices" );
 954                 }
 955
 956                 return true;
 957         }
 958
 959         protected function doUniquePlTlIl() {
 960                 $info = $this->db->indexInfo( 'pagelinks', 'pl_namespace' );
 961                 if ( is_array( $info ) && !$info[0]->Non_unique ) {
 962                         $this->output( "...pl_namespace, tl_namespace, il_to indices are already UNIQUE.\n" );
 963
 964                         return true;
 965                 }
 966                 if ( $this->skipSchema ) {
 967                         $this->output( "...skipping schema change (making pl_namespace, tl_namespace " .
 968                                 "and il_to indices UNIQUE).\n" );
 969
 970                         return false;
 971                 }
 972
 973                 return $this->applyPatch(
 974                         'patch-pl-tl-il-unique.sql',
 975                         false,
 976                         'Making pl_namespace, tl_namespace and il_to indices UNIQUE'
 977                 );
 978         }
 979
 980         protected function doUpdateMimeMinorField() {
 981                 if ( $this->updateRowExists( 'mime_minor_length' ) ) {
 982                         $this->output( "...*_mime_minor fields are already long enough.\n" );
 983
 984                         return;
 985                 }
 986
 987                 $this->applyPatch(
 988                         'patch-mime_minor_length.sql',
 989                         false,
 990                         'Altering all *_mime_minor fields to 100 bytes in size'
 991                 );
 992         }
 993
 994         protected function doClFieldsUpdate() {
 995                 if ( $this->updateRowExists( 'cl_fields_update' ) ) {
 996                         $this->output( "...categorylinks up-to-date.\n" );
 997
 998                         return;
 999                 }
1000
1001                 $this->applyPatch(
1002                         'patch-categorylinks-better-collation2.sql',
1003                         false,
1004                         'Updating categorylinks (again)'
1005                 );
1006         }
1007
1008         protected function doLangLinksLengthUpdate() {
1009                 $langlinks = $this->db->tableName( 'langlinks' );
1010                 $res = $this->db->query( "SHOW COLUMNS FROM $langlinks LIKE 'll_lang'" );
1011                 $row = $this->db->fetchObject( $res );
1012
1013                 if ( $row && $row->Type == "varbinary(10)" ) {
1014                         $this->applyPatch(
1015                                 'patch-langlinks-ll_lang-20.sql',
1016                                 false,
1017                                 'Updating length of ll_lang in langlinks'
1018                         );
1019                 } else {
1020                         $this->output( "...ll_lang is up-to-date.\n" );
1021                 }
1022         }
1023
1024         protected function doUserNewTalkTimestampNotNull() {
1025                 if ( !$this->doTable( 'user_newtalk' ) ) {
1026                         return true;
1027                 }
1028
1029                 $info = $this->db->fieldInfo( 'user_newtalk', 'user_last_timestamp' );
1030                 if ( $info === false ) {
1031                         return;
1032                 }
1033                 if ( $info->isNullable() ) {
1034                         $this->output( "...user_last_timestamp is already nullable.\n" );
1035
1036                         return;
1037                 }
1038
1039                 $this->applyPatch(
1040                         'patch-user-newtalk-timestamp-null.sql',
1041                         false,
1042                         'Making user_last_timestamp nullable'
1043                 );
1044         }
1045
1046         protected function doIwlinksIndexNonUnique() {
1047                 $info = $this->db->indexInfo( 'iwlinks', 'iwl_prefix_title_from' );
1048                 if ( is_array( $info ) && $info[0]->Non_unique ) {
1049                         $this->output( "...iwl_prefix_title_from index is already non-UNIQUE.\n" );
1050
1051                         return true;
1052                 }
1053                 if ( $this->skipSchema ) {
1054                         $this->output( "...skipping schema change (making iwl_prefix_title_from index non-UNIQUE).\n" );
1055
1056                         return false;
1057                 }
1058
1059                 return $this->applyPatch(
1060                         'patch-iwl_prefix_title_from-non-unique.sql',
1061                         false,
1062                         'Making iwl_prefix_title_from index non-UNIQUE'
1063                 );
1064         }
1065 }