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
 254                         // 1.24
 255                         array( 'addField', 'page_props', 'pp_sortkey', 'patch-pp_sortkey.sql' ),
 256                         array( 'dropField', 'recentchanges', 'rc_cur_time', 'patch-drop-rc_cur_time.sql' ),
 257                         array( 'addIndex', 'watchlist', 'wl_user_notificationtimestamp', 'patch-watchlist-user-notificationtimestamp-index.sql' ),
 258                 );
 259         }
 260
 261         /**
 262          * 1.4 betas were missing the 'binary' marker from logging.log_title,
 263          * which causes a collation mismatch error on joins in MySQL 4.1.
 264          *
 265          * @param string $table Table name
 266          * @param string $field Field name to check
 267          * @param string $patchFile Path to the patch to correct the field
 268          * @return bool
 269          */
 270         protected function checkBin( $table, $field, $patchFile ) {
 271                 if ( !$this->doTable( $table ) ) {
 272                         return true;
 273                 }
 274
 275                 /** @var MySQLField $fieldInfo */
 276                 $fieldInfo = $this->db->fieldInfo( $table, $field );
 277                 if ( $fieldInfo->isBinary() ) {
 278                         $this->output( "...$table table has correct $field encoding.\n" );
 279                 } else {
 280                         $this->applyPatch( $patchFile, false, "Fixing $field encoding on $table table" );
 281                 }
 282         }
 283
 284         /**
 285          * Check whether an index contain a field
 286          *
 287          * @param string $table Table name
 288          * @param string $index Index name to check
 289          * @param string $field Field that should be in the index
 290          * @return bool
 291          */
 292         protected function indexHasField( $table, $index, $field ) {
 293                 if ( !$this->doTable( $table ) ) {
 294                         return true;
 295                 }
 296
 297                 $info = $this->db->indexInfo( $table, $index, __METHOD__ );
 298                 if ( $info ) {
 299                         foreach ( $info as $row ) {
 300                                 if ( $row->Column_name == $field ) {
 301                                         $this->output( "...index $index on table $table includes field $field.\n" );
 302
 303                                         return true;
 304                                 }
 305                         }
 306                 }
 307                 $this->output( "...index $index on table $table has no field $field; added.\n" );
 308
 309                 return false;
 310         }
 311
 312         /**
 313          * Check that interwiki table exists; if it doesn't source it
 314          */
 315         protected function doInterwikiUpdate() {
 316                 global $IP;
 317
 318                 if ( !$this->doTable( 'interwiki' ) ) {
 319                         return true;
 320                 }
 321
 322                 if ( $this->db->tableExists( "interwiki", __METHOD__ ) ) {
 323                         $this->output( "...already have interwiki table\n" );
 324
 325                         return;
 326                 }
 327
 328                 $this->applyPatch( 'patch-interwiki.sql', false, 'Creating interwiki table' );
 329                 $this->applyPatch(
 330                         "$IP/maintenance/interwiki.sql",
 331                         true,
 332                         'Adding default interwiki definitions'
 333                 );
 334         }
 335
 336         /**
 337          * Check that proper indexes are in place
 338          */
 339         protected function doIndexUpdate() {
 340                 $meta = $this->db->fieldInfo( 'recentchanges', 'rc_timestamp' );
 341                 if ( $meta === false ) {
 342                         throw new MWException( 'Missing rc_timestamp field of recentchanges table. Should not happen.' );
 343                 }
 344                 if ( $meta->isMultipleKey() ) {
 345                         $this->output( "...indexes seem up to 20031107 standards.\n" );
 346
 347                         return;
 348                 }
 349
 350                 $this->applyPatch( 'patch-indexes.sql', true, "Updating indexes to 20031107" );
 351         }
 352
 353         protected function doOldLinksUpdate() {
 354                 $cl = $this->maintenance->runChild( 'ConvertLinks' );
 355                 $cl->execute();
 356         }
 357
 358         protected function doFixAncientImagelinks() {
 359                 $info = $this->db->fieldInfo( 'imagelinks', 'il_from' );
 360                 if ( !$info || $info->type() !== 'string' ) {
 361                         $this->output( "...il_from OK\n" );
 362
 363                         return;
 364                 }
 365
 366                 $applied = $this->applyPatch(
 367                         'patch-fix-il_from.sql',
 368                         false,
 369                         'Fixing ancient broken imagelinks table.'
 370                 );
 371
 372                 if ( $applied ) {
 373                         $this->output( "NOTE: you will have to run maintenance/refreshLinks.php after this." );
 374                 }
 375         }
 376
 377         /**
 378          * Check if we need to add talk page rows to the watchlist
 379          */
 380         function doWatchlistUpdate() {
 381                 $talk = $this->db->selectField( 'watchlist', 'count(*)', 'wl_namespace & 1', __METHOD__ );
 382                 $nontalk = $this->db->selectField(
 383                         'watchlist',
 384                         'count(*)',
 385                         'NOT (wl_namespace & 1)',
 386                         __METHOD__
 387                 );
 388                 if ( $talk == $nontalk ) {
 389                         $this->output( "...watchlist talk page rows already present.\n" );
 390
 391                         return;
 392                 }
 393
 394                 $this->output( "Adding missing watchlist talk page rows... " );
 395                 $this->db->insertSelect( 'watchlist', 'watchlist',
 396                         array(
 397                                 'wl_user' => 'wl_user',
 398                                 'wl_namespace' => 'wl_namespace | 1',
 399                                 'wl_title' => 'wl_title',
 400                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 401                         ), array( 'NOT (wl_namespace & 1)' ), __METHOD__, 'IGNORE' );
 402                 $this->output( "done.\n" );
 403
 404                 $this->output( "Adding missing watchlist subject page rows... " );
 405                 $this->db->insertSelect( 'watchlist', 'watchlist',
 406                         array(
 407                                 'wl_user' => 'wl_user',
 408                                 'wl_namespace' => 'wl_namespace & ~1',
 409                                 'wl_title' => 'wl_title',
 410                                 'wl_notificationtimestamp' => 'wl_notificationtimestamp'
 411                         ), array( 'wl_namespace & 1' ), __METHOD__, 'IGNORE' );
 412                 $this->output( "done.\n" );
 413         }
 414
 415         function doSchemaRestructuring() {
 416                 if ( $this->db->tableExists( 'page', __METHOD__ ) ) {
 417                         $this->output( "...page table already exists.\n" );
 418
 419                         return;
 420                 }
 421
 422                 $this->output( "...converting from cur/old to page/revision/text DB structure.\n" );
 423                 $this->output( wfTimestamp( TS_DB ) );
 424                 $this->output( "......checking for duplicate entries.\n" );
 425
 426                 list( $cur, $old, $page, $revision, $text ) = $this->db->tableNamesN(
 427                         'cur',
 428                         'old',
 429                         'page',
 430                         'revision',
 431                         'text'
 432                 );
 433
 434                 $rows = $this->db->query( "
 435                         SELECT cur_title, cur_namespace, COUNT(cur_namespace) AS c
 436                         FROM $cur
 437                         GROUP BY cur_title, cur_namespace
 438                         HAVING c>1",
 439                         __METHOD__
 440                 );
 441
 442                 if ( $rows->numRows() > 0 ) {
 443                         $this->output( wfTimestamp( TS_DB ) );
 444                         $this->output( "......<b>Found duplicate entries</b>\n" );
 445                         $this->output( sprintf( "<b>      %-60s %3s %5s</b>\n", 'Title', 'NS', 'Count' ) );
 446                         $duplicate = array();
 447                         foreach ( $rows as $row ) {
 448                                 if ( !isset( $duplicate[$row->cur_namespace] ) ) {
 449                                         $duplicate[$row->cur_namespace] = array();
 450                                 }
 451
 452                                 $duplicate[$row->cur_namespace][] = $row->cur_title;
 453                                 $this->output( sprintf(
 454                                         "      %-60s %3s %5s\n",
 455                                         $row->cur_title, $row->cur_namespace,
 456                                         $row->c
 457                                 ) );
 458                         }
 459                         $sql = "SELECT cur_title, cur_namespace, cur_id, cur_timestamp FROM $cur WHERE ";
 460                         $firstCond = true;
 461                         foreach ( $duplicate as $ns => $titles ) {
 462                                 if ( $firstCond ) {
 463                                         $firstCond = false;
 464                                 } else {
 465                                         $sql .= ' OR ';
 466                                 }
 467                                 $sql .= "( cur_namespace = {$ns} AND cur_title in (";
 468                                 $first = true;
 469                                 foreach ( $titles as $t ) {
 470                                         if ( $first ) {
 471                                                 $sql .= $this->db->addQuotes( $t );
 472                                                 $first = false;
 473                                         } else {
 474                                                 $sql .= ', ' . $this->db->addQuotes( $t );
 475                                         }
 476                                 }
 477                                 $sql .= ") ) \n";
 478                         }
 479                         # By sorting descending, the most recent entry will be the first in the list.
 480                         # All following entries will be deleted by the next while-loop.
 481                         $sql .= 'ORDER BY cur_namespace, cur_title, cur_timestamp DESC';
 482
 483                         $rows = $this->db->query( $sql, __METHOD__ );
 484
 485                         $prev_title = $prev_namespace = false;
 486                         $deleteId = array();
 487
 488                         foreach ( $rows as $row ) {
 489                                 if ( $prev_title == $row->cur_title && $prev_namespace == $row->cur_namespace ) {
 490                                         $deleteId[] = $row->cur_id;
 491                                 }
 492                                 $prev_title = $row->cur_title;
 493                                 $prev_namespace = $row->cur_namespace;
 494                         }
 495                         $sql = "DELETE FROM $cur WHERE cur_id IN ( " . join( ',', $deleteId ) . ')';
 496                         $this->db->query( $sql, __METHOD__ );
 497                         $this->output( wfTimestamp( TS_DB ) );
 498                         $this->output( "......<b>Deleted</b> " . $this->db->affectedRows() . " records.\n" );
 499                 }
 500
 501                 $this->output( wfTimestamp( TS_DB ) );
 502                 $this->output( "......Creating tables.\n" );
 503                 $this->db->query( "CREATE TABLE $page (
 504                         page_id int(8) unsigned NOT NULL auto_increment,
 505                         page_namespace int NOT NULL,
 506                         page_title varchar(255) binary NOT NULL,
 507                         page_restrictions tinyblob NOT NULL,
 508                         page_counter bigint(20) unsigned NOT NULL default '0',
 509                         page_is_redirect tinyint(1) unsigned NOT NULL default '0',
 510                         page_is_new tinyint(1) unsigned NOT NULL default '0',
 511                         page_random real unsigned NOT NULL,
 512                         page_touched char(14) binary NOT NULL default '',
 513                         page_latest int(8) unsigned NOT NULL,
 514                         page_len int(8) unsigned NOT NULL,
 515
 516                         PRIMARY KEY page_id (page_id),
 517                         UNIQUE INDEX name_title (page_namespace,page_title),
 518                         INDEX (page_random),
 519                         INDEX (page_len)
 520                         ) ENGINE=InnoDB", __METHOD__ );
 521                 $this->db->query( "CREATE TABLE $revision (
 522                         rev_id int(8) unsigned NOT NULL auto_increment,
 523                         rev_page int(8) unsigned NOT NULL,
 524                         rev_comment tinyblob NOT NULL,
 525                         rev_user int(5) unsigned NOT NULL default '0',
 526                         rev_user_text varchar(255) binary NOT NULL default '',
 527                         rev_timestamp char(14) binary NOT NULL default '',
 528                         rev_minor_edit tinyint(1) unsigned NOT NULL default '0',
 529                         rev_deleted tinyint(1) unsigned NOT NULL default '0',
 530                         rev_len int(8) unsigned,
 531                         rev_parent_id int(8) unsigned default NULL,
 532                         PRIMARY KEY rev_page_id (rev_page, rev_id),
 533                         UNIQUE INDEX rev_id (rev_id),
 534                         INDEX rev_timestamp (rev_timestamp),
 535                         INDEX page_timestamp (rev_page,rev_timestamp),
 536                         INDEX user_timestamp (rev_user,rev_timestamp),
 537                         INDEX usertext_timestamp (rev_user_text,rev_timestamp)
 538                         ) ENGINE=InnoDB", __METHOD__ );
 539
 540                 $this->output( wfTimestamp( TS_DB ) );
 541                 $this->output( "......Locking tables.\n" );
 542                 $this->db->query(
 543                         "LOCK TABLES $page WRITE, $revision WRITE, $old WRITE, $cur WRITE",
 544                         __METHOD__
 545                 );
 546
 547                 $maxold = intval( $this->db->selectField( 'old', 'max(old_id)', '', __METHOD__ ) );
 548                 $this->output( wfTimestamp( TS_DB ) );
 549                 $this->output( "......maxold is {$maxold}\n" );
 550
 551                 $this->output( wfTimestamp( TS_DB ) );
 552                 global $wgLegacySchemaConversion;
 553                 if ( $wgLegacySchemaConversion ) {
 554                         // Create HistoryBlobCurStub entries.
 555                         // Text will be pulled from the leftover 'cur' table at runtime.
 556                         $this->output( "......Moving metadata from cur; using blob references to text in cur table.\n" );
 557                         $cur_text = "concat('O:18:\"historyblobcurstub\":1:{s:6:\"mCurId\";i:',cur_id,';}')";
 558                         $cur_flags = "'object'";
 559                 } else {
 560                         // Copy all cur text in immediately: this may take longer but avoids
 561                         // having to keep an extra table around.
 562                         $this->output( "......Moving text from cur.\n" );
 563                         $cur_text = 'cur_text';
 564                         $cur_flags = "''";
 565                 }
 566                 $this->db->query(
 567                         "INSERT INTO $old (old_namespace, old_title, old_text, old_comment, old_user,
 568                                 old_user_text, old_timestamp, old_minor_edit, old_flags)
 569                         SELECT cur_namespace, cur_title, $cur_text, cur_comment, cur_user, cur_user_text,
 570                                 cur_timestamp, cur_minor_edit, $cur_flags
 571                         FROM $cur",
 572                         __METHOD__
 573                 );
 574
 575                 $this->output( wfTimestamp( TS_DB ) );
 576                 $this->output( "......Setting up revision table.\n" );
 577                 $this->db->query(
 578                         "INSERT INTO $revision (rev_id, rev_page, rev_comment, rev_user,
 579                                 rev_user_text, rev_timestamp, rev_minor_edit)
 580                         SELECT old_id, cur_id, old_comment, old_user, old_user_text,
 581                                 old_timestamp, old_minor_edit
 582                         FROM $old,$cur WHERE old_namespace=cur_namespace AND old_title=cur_title",
 583                         __METHOD__
 584                 );
 585
 586                 $this->output( wfTimestamp( TS_DB ) );
 587                 $this->output( "......Setting up page table.\n" );
 588                 $this->db->query(
 589                         "INSERT INTO $page (page_id, page_namespace, page_title,
 590                                 page_restrictions, page_counter, page_is_redirect, page_is_new, page_random,
 591                                 page_touched, page_latest, page_len)
 592                         SELECT cur_id, cur_namespace, cur_title, cur_restrictions, cur_counter,
 593                                 cur_is_redirect, cur_is_new, cur_random, cur_touched, rev_id, LENGTH(cur_text)
 594                         FROM $cur,$revision
 595                         WHERE cur_id=rev_page AND rev_timestamp=cur_timestamp AND rev_id > {$maxold}",
 596                         __METHOD__
 597                 );
 598
 599                 $this->output( wfTimestamp( TS_DB ) );
 600                 $this->output( "......Unlocking tables.\n" );
 601                 $this->db->query( "UNLOCK TABLES", __METHOD__ );
 602
 603                 $this->output( wfTimestamp( TS_DB ) );
 604                 $this->output( "......Renaming old.\n" );
 605                 $this->db->query( "ALTER TABLE $old RENAME TO $text", __METHOD__ );
 606
 607                 $this->output( wfTimestamp( TS_DB ) );
 608                 $this->output( "...done.\n" );
 609         }
 610
 611         protected function doNamespaceSize() {
 612                 $tables = array(
 613                         'page' => 'page',
 614                         'archive' => 'ar',
 615                         'recentchanges' => 'rc',
 616                         'watchlist' => 'wl',
 617                         'querycache' => 'qc',
 618                         'logging' => 'log',
 619                 );
 620                 foreach ( $tables as $table => $prefix ) {
 621                         $field = $prefix . '_namespace';
 622
 623                         $tablename = $this->db->tableName( $table );
 624                         $result = $this->db->query( "SHOW COLUMNS FROM $tablename LIKE '$field'", __METHOD__ );
 625                         $info = $this->db->fetchObject( $result );
 626
 627                         if ( substr( $info->Type, 0, 3 ) == 'int' ) {
 628                                 $this->output( "...$field is already a full int ($info->Type).\n" );
 629                         } else {
 630                                 $this->output( "Promoting $field from $info->Type to int... " );
 631                                 $this->db->query( "ALTER TABLE $tablename MODIFY $field int NOT NULL", __METHOD__ );
 632                                 $this->output( "done.\n" );
 633                         }
 634                 }
 635         }
 636
 637         protected function doPagelinksUpdate() {
 638                 if ( $this->db->tableExists( 'pagelinks', __METHOD__ ) ) {
 639                         $this->output( "...already have pagelinks table.\n" );
 640
 641                         return;
 642                 }
 643
 644                 $this->applyPatch(
 645                         'patch-pagelinks.sql',
 646                         false,
 647                         'Converting links and brokenlinks tables to pagelinks'
 648                 );
 649
 650                 global $wgContLang;
 651                 foreach ( $wgContLang->getNamespaces() as $ns => $name ) {
 652                         if ( $ns == 0 ) {
 653                                 continue;
 654                         }
 655
 656                         $this->output( "Cleaning up broken links for namespace $ns... " );
 657                         $this->db->update( 'pagelinks',
 658                                 array(
 659                                         'pl_namespace' => $ns,
 660                                         "pl_title = TRIM(LEADING {$this->db->addQuotes( "$name:" )} FROM pl_title)",
 661                                 ),
 662                                 array(
 663                                         'pl_namespace' => 0,
 664                                         'pl_title' . $this->db->buildLike( "$name:", $this->db->anyString() ),
 665                                 ),
 666                                 __METHOD__
 667                         );
 668                         $this->output( "done.\n" );
 669                 }
 670         }
 671
 672         protected function doUserUniqueUpdate() {
 673                 if ( !$this->doTable( 'user' ) ) {
 674                         return true;
 675                 }
 676
 677                 $duper = new UserDupes( $this->db, array( $this, 'output' ) );
 678                 if ( $duper->hasUniqueIndex() ) {
 679                         $this->output( "...already have unique user_name index.\n" );
 680
 681                         return;
 682                 }
 683
 684                 if ( !$duper->clearDupes() ) {
 685                         $this->output( "WARNING: This next step will probably fail due to unfixed duplicates...\n" );
 686                 }
 687                 $this->applyPatch( 'patch-user_nameindex.sql', false, "Adding unique index on user_name" );
 688         }
 689
 690         protected function doUserGroupsUpdate() {
 691                 if ( !$this->doTable( 'user_groups' ) ) {
 692                         return true;
 693                 }
 694
 695                 if ( $this->db->tableExists( 'user_groups', __METHOD__ ) ) {
 696                         $info = $this->db->fieldInfo( 'user_groups', 'ug_group' );
 697                         if ( $info->type() == 'int' ) {
 698                                 $oldug = $this->db->tableName( 'user_groups' );
 699                                 $newug = $this->db->tableName( 'user_groups_bogus' );
 700                                 $this->output( "user_groups table exists but is in bogus intermediate " .
 701                                         "format. Renaming to $newug... " );
 702                                 $this->db->query( "ALTER TABLE $oldug RENAME TO $newug", __METHOD__ );
 703                                 $this->output( "done.\n" );
 704
 705                                 $this->applyPatch( 'patch-user_groups.sql', false, "Re-adding fresh user_groups table" );
 706
 707                                 $this->output( "***\n" );
 708                                 $this->output( "*** WARNING: You will need to manually fix up user " .
 709                                         "permissions in the user_groups\n" );
 710                                 $this->output( "*** table. Old 1.5 alpha versions did some pretty funky stuff...\n" );
 711                                 $this->output( "***\n" );
 712                         } else {
 713                                 $this->output( "...user_groups table exists and is in current format.\n" );
 714                         }
 715
 716                         return;
 717                 }
 718
 719                 $this->applyPatch( 'patch-user_groups.sql', false, "Adding user_groups table" );
 720
 721                 if ( !$this->db->tableExists( 'user_rights', __METHOD__ ) ) {
 722                         if ( $this->db->fieldExists( 'user', 'user_rights', __METHOD__ ) ) {
 723                                 $this->applyPatch(
 724                                         'patch-user_rights.sql',
 725                                         false,
 726                                         'Upgrading from a 1.3 or older database? Breaking out user_rights for conversion'
 727                                 );
 728                         } else {
 729                                 $this->output( "*** WARNING: couldn't locate user_rights table or field for upgrade.\n" );
 730                                 $this->output( "*** You may need to manually configure some sysops by manipulating\n" );
 731                                 $this->output( "*** the user_groups table.\n" );
 732
 733                                 return;
 734                         }
 735                 }
 736
 737                 $this->output( "Converting user_rights table to user_groups... " );
 738                 $result = $this->db->select( 'user_rights',
 739                         array( 'ur_user', 'ur_rights' ),
 740                         array( "ur_rights != ''" ),
 741                         __METHOD__ );
 742
 743                 foreach ( $result as $row ) {
 744                         $groups = array_unique(
 745                                 array_map( 'trim',
 746                                         explode( ',', $row->ur_rights ) ) );
 747
 748                         foreach ( $groups as $group ) {
 749                                 $this->db->insert( 'user_groups',
 750                                         array(
 751                                                 'ug_user' => $row->ur_user,
 752                                                 'ug_group' => $group ),
 753                                         __METHOD__ );
 754                         }
 755                 }
 756                 $this->output( "done.\n" );
 757         }
 758
 759         /**
 760          * Make sure wl_notificationtimestamp can be NULL,
 761          * and update old broken items.
 762          */
 763         protected function doWatchlistNull() {
 764                 $info = $this->db->fieldInfo( 'watchlist', 'wl_notificationtimestamp' );
 765                 if ( !$info ) {
 766                         return;
 767                 }
 768                 if ( $info->isNullable() ) {
 769                         $this->output( "...wl_notificationtimestamp is already nullable.\n" );
 770
 771                         return;
 772                 }
 773
 774                 $this->applyPatch(
 775                         'patch-watchlist-null.sql',
 776                         false,
 777                         'Making wl_notificationtimestamp nullable'
 778                 );
 779         }
 780
 781         /**
 782          * Set page_random field to a random value where it is equals to 0.
 783          *
 784          * @see bug 3946
 785          */
 786         protected function doPageRandomUpdate() {
 787                 $page = $this->db->tableName( 'page' );
 788                 $this->db->query( "UPDATE $page SET page_random = RAND() WHERE page_random = 0", __METHOD__ );
 789                 $rows = $this->db->affectedRows();
 790
 791                 if ( $rows ) {
 792                         $this->output( "Set page_random to a random value on $rows rows where it was set to 0\n" );
 793                 } else {
 794                         $this->output( "...no page_random rows needed to be set\n" );
 795                 }
 796         }
 797
 798         protected function doTemplatelinksUpdate() {
 799                 if ( $this->db->tableExists( 'templatelinks', __METHOD__ ) ) {
 800                         $this->output( "...templatelinks table already exists\n" );
 801
 802                         return;
 803                 }
 804
 805                 $this->applyPatch( 'patch-templatelinks.sql', false, "Creating templatelinks table" );
 806
 807                 $this->output( "Populating...\n" );
 808                 if ( wfGetLB()->getServerCount() > 1 ) {
 809                         // Slow, replication-friendly update
 810                         $res = $this->db->select( 'pagelinks', array( 'pl_from', 'pl_namespace', 'pl_title' ),
 811                                 array( 'pl_namespace' => NS_TEMPLATE ), __METHOD__ );
 812                         $count = 0;
 813                         foreach ( $res as $row ) {
 814                                 $count = ( $count + 1 ) % 100;
 815                                 if ( $count == 0 ) {
 816                                         wfWaitForSlaves();
 817                                 }
 818                                 $this->db->insert( 'templatelinks',
 819                                         array(
 820                                                 'tl_from' => $row->pl_from,
 821                                                 'tl_namespace' => $row->pl_namespace,
 822                                                 'tl_title' => $row->pl_title,
 823                                         ), __METHOD__
 824                                 );
 825                         }
 826                 } else {
 827                         // Fast update
 828                         $this->db->insertSelect( 'templatelinks', 'pagelinks',
 829                                 array(
 830                                         'tl_from' => 'pl_from',
 831                                         'tl_namespace' => 'pl_namespace',
 832                                         'tl_title' => 'pl_title'
 833                                 ), array(
 834                                         'pl_namespace' => 10
 835                                 ), __METHOD__
 836                         );
 837                 }
 838                 $this->output( "Done. Please run maintenance/refreshLinks.php for a more " .
 839                         "thorough templatelinks update.\n" );
 840         }
 841
 842         protected function doBacklinkingIndicesUpdate() {
 843                 if ( !$this->indexHasField( 'pagelinks', 'pl_namespace', 'pl_from' ) ||
 844                         !$this->indexHasField( 'templatelinks', 'tl_namespace', 'tl_from' ) ||
 845                         !$this->indexHasField( 'imagelinks', 'il_to', 'il_from' )
 846                 ) {
 847                         $this->applyPatch( 'patch-backlinkindexes.sql', false, "Updating backlinking indices" );
 848                 }
 849         }
 850
 851         /**
 852          * Adding page_restrictions table, obsoleting page.page_restrictions.
 853          * Migrating old restrictions to new table
 854          * -- Andrew Garrett, January 2007.
 855          */
 856         protected function doRestrictionsUpdate() {
 857                 if ( $this->db->tableExists( 'page_restrictions', __METHOD__ ) ) {
 858                         $this->output( "...page_restrictions table already exists.\n" );
 859
 860                         return;
 861                 }
 862
 863                 $this->applyPatch(
 864                         'patch-page_restrictions.sql',
 865                         false,
 866                         'Creating page_restrictions table (1/2)'
 867                 );
 868                 $this->applyPatch(
 869                         'patch-page_restrictions_sortkey.sql',
 870                         false,
 871                         'Creating page_restrictions table (2/2)'
 872                 );
 873                 $this->output( "done.\n" );
 874
 875                 $this->output( "Migrating old restrictions to new table...\n" );
 876                 $task = $this->maintenance->runChild( 'UpdateRestrictions' );
 877                 $task->execute();
 878         }
 879
 880         protected function doCategorylinksIndicesUpdate() {
 881                 if ( !$this->indexHasField( 'categorylinks', 'cl_sortkey', 'cl_from' ) ) {
 882                         $this->applyPatch( 'patch-categorylinksindex.sql', false, "Updating categorylinks Indices" );
 883                 }
 884         }
 885
 886         protected function doCategoryPopulation() {
 887                 if ( $this->updateRowExists( 'populate category' ) ) {
 888                         $this->output( "...category table already populated.\n" );
 889
 890                         return;
 891                 }
 892
 893                 $this->output(
 894                         "Populating category table, printing progress markers. " .
 895                         "For large databases, you\n" .
 896                         "may want to hit Ctrl-C and do this manually with maintenance/\n" .
 897                         "populateCategory.php.\n"
 898                 );
 899                 $task = $this->maintenance->runChild( 'PopulateCategory' );
 900                 $task->execute();
 901                 $this->output( "Done populating category table.\n" );
 902         }
 903
 904         protected function doPopulateParentId() {
 905                 if ( !$this->updateRowExists( 'populate rev_parent_id' ) ) {
 906                         $this->output(
 907                                 "Populating rev_parent_id fields, printing progress markers. For large\n" .
 908                                 "databases, you may want to hit Ctrl-C and do this manually with\n" .
 909                                 "maintenance/populateParentId.php.\n" );
 910
 911                         $task = $this->maintenance->runChild( 'PopulateParentId' );
 912                         $task->execute();
 913                 }
 914         }
 915
 916         protected function doEnableProfiling() {
 917                 global $wgProfileToDatabase;
 918
 919                 if ( !$this->doTable( 'profiling' ) ) {
 920                         return true;
 921                 }
 922
 923                 if ( $wgProfileToDatabase === true && !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 924                         $this->applyPatch( 'patch-profiling.sql', false, 'Add profiling table' );
 925                 }
 926         }
 927
 928         protected function doMaybeProfilingMemoryUpdate() {
 929                 if ( !$this->doTable( 'profiling' ) ) {
 930                         return true;
 931                 }
 932
 933                 if ( !$this->db->tableExists( 'profiling', __METHOD__ ) ) {
 934                         return true;
 935                 } elseif ( $this->db->fieldExists( 'profiling', 'pf_memory', __METHOD__ ) ) {
 936                         $this->output( "...profiling table has pf_memory field.\n" );
 937
 938                         return true;
 939                 }
 940
 941                 return $this->applyPatch(
 942                         'patch-profiling-memory.sql',
 943                         false,
 944                         'Adding pf_memory field to table profiling'
 945                 );
 946         }
 947
 948         protected function doFilearchiveIndicesUpdate() {
 949                 $info = $this->db->indexInfo( 'filearchive', 'fa_user_timestamp', __METHOD__ );
 950                 if ( !$info ) {
 951                         $this->applyPatch( 'patch-filearchive-user-index.sql', false, "Updating filearchive indices" );
 952                 }
 953
 954                 return true;
 955         }
 956
 957         protected function doUniquePlTlIl() {
 958                 $info = $this->db->indexInfo( 'pagelinks', 'pl_namespace' );
 959                 if ( is_array( $info ) && !$info[0]->Non_unique ) {
 960                         $this->output( "...pl_namespace, tl_namespace, il_to indices are already UNIQUE.\n" );
 961
 962                         return true;
 963                 }
 964                 if ( $this->skipSchema ) {
 965                         $this->output( "...skipping schema change (making pl_namespace, tl_namespace " .
 966                                 "and il_to indices UNIQUE).\n" );
 967
 968                         return false;
 969                 }
 970
 971                 return $this->applyPatch(
 972                         'patch-pl-tl-il-unique.sql',
 973                         false,
 974                         'Making pl_namespace, tl_namespace and il_to indices UNIQUE'
 975                 );
 976         }
 977
 978         protected function doUpdateMimeMinorField() {
 979                 if ( $this->updateRowExists( 'mime_minor_length' ) ) {
 980                         $this->output( "...*_mime_minor fields are already long enough.\n" );
 981
 982                         return;
 983                 }
 984
 985                 $this->applyPatch(
 986                         'patch-mime_minor_length.sql',
 987                         false,
 988                         'Altering all *_mime_minor fields to 100 bytes in size'
 989                 );
 990         }
 991
 992         protected function doClFieldsUpdate() {
 993                 if ( $this->updateRowExists( 'cl_fields_update' ) ) {
 994                         $this->output( "...categorylinks up-to-date.\n" );
 995
 996                         return;
 997                 }
 998
 999                 $this->applyPatch(
1000                         'patch-categorylinks-better-collation2.sql',
1001                         false,
1002                         'Updating categorylinks (again)'
1003                 );
1004         }
1005
1006         protected function doLangLinksLengthUpdate() {
1007                 $langlinks = $this->db->tableName( 'langlinks' );
1008                 $res = $this->db->query( "SHOW COLUMNS FROM $langlinks LIKE 'll_lang'" );
1009                 $row = $this->db->fetchObject( $res );
1010
1011                 if ( $row && $row->Type == "varbinary(10)" ) {
1012                         $this->applyPatch(
1013                                 'patch-langlinks-ll_lang-20.sql',
1014                                 false,
1015                                 'Updating length of ll_lang in langlinks'
1016                         );
1017                 } else {
1018                         $this->output( "...ll_lang is up-to-date.\n" );
1019                 }
1020         }
1021
1022         protected function doUserNewTalkTimestampNotNull() {
1023                 if ( !$this->doTable( 'user_newtalk' ) ) {
1024                         return true;
1025                 }
1026
1027                 $info = $this->db->fieldInfo( 'user_newtalk', 'user_last_timestamp' );
1028                 if ( $info === false ) {
1029                         return;
1030                 }
1031                 if ( $info->isNullable() ) {
1032                         $this->output( "...user_last_timestamp is already nullable.\n" );
1033
1034                         return;
1035                 }
1036
1037                 $this->applyPatch(
1038                         'patch-user-newtalk-timestamp-null.sql',
1039                         false,
1040                         'Making user_last_timestamp nullable'
1041                 );
1042         }
1043
1044         protected function doIwlinksIndexNonUnique() {
1045                 $info = $this->db->indexInfo( 'iwlinks', 'iwl_prefix_title_from' );
1046                 if ( is_array( $info ) && $info[0]->Non_unique ) {
1047                         $this->output( "...iwl_prefix_title_from index is already non-UNIQUE.\n" );
1048
1049                         return true;
1050                 }
1051                 if ( $this->skipSchema ) {
1052                         $this->output( "...skipping schema change (making iwl_prefix_title_from index non-UNIQUE).\n" );
1053
1054                         return false;
1055                 }
1056
1057                 return $this->applyPatch(
1058                         'patch-iwl_prefix_title_from-non-unique.sql',
1059                         false,
1060                         'Making iwl_prefix_title_from index non-UNIQUE'
1061                 );
1062         }
1063 }