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