includes/installer/PostgresUpdater.php

   1 <?php
   2 /**
   3  * PostgreSQL-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  * Class for handling updates to Postgres databases.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30
  31 class PostgresUpdater extends DatabaseUpdater {
  32
  33         /**
  34          * @var DatabasePostgres
  35          */
  36         protected $db;
  37
  38         /**
  39          * @todo FIXME: Postgres should use sequential updates like Mysql, Sqlite
  40          * and everybody else. It never got refactored like it should've.
  41          * @return array
  42          */
  43         protected function getCoreUpdateList() {
  44                 return array(
  45                         # rename tables 1.7.3
  46                         # r15791 Change reserved word table names "user" and "text"
  47                         array( 'renameTable', 'user', 'mwuser' ),
  48                         array( 'renameTable', 'text', 'pagecontent' ),
  49                         array( 'renameIndex', 'mwuser', 'user_pkey', 'mwuser_pkey'),
  50                         array( 'renameIndex', 'mwuser', 'user_user_name_key', 'mwuser_user_name_key' ),
  51                         array( 'renameIndex', 'pagecontent','text_pkey', 'pagecontent_pkey' ),
  52
  53                         # renamed sequences
  54                         array( 'renameSequence', 'ipblocks_ipb_id_val', 'ipblocks_ipb_id_seq'         ),
  55                         array( 'renameSequence', 'rev_rev_id_val',      'revision_rev_id_seq'         ),
  56                         array( 'renameSequence', 'text_old_id_val',     'text_old_id_seq'             ),
  57                         array( 'renameSequence', 'rc_rc_id_seq',        'recentchanges_rc_id_seq'     ),
  58                         array( 'renameSequence', 'log_log_id_seq',      'logging_log_id_seq'          ),
  59                         array( 'renameSequence', 'pr_id_val',           'page_restrictions_pr_id_seq' ),
  60                         array( 'renameSequence', 'us_id_seq',           'uploadstash_us_id_seq' ),
  61
  62                         # since r58263
  63                         array( 'renameSequence', 'category_id_seq', 'category_cat_id_seq'),
  64
  65                         # new sequences if not renamed above
  66                         array( 'addSequence', 'logging', false, 'logging_log_id_seq' ),
  67                         array( 'addSequence', 'page_restrictions', false, 'page_restrictions_pr_id_seq' ),
  68                         array( 'addSequence', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ),
  69
  70                         # new tables
  71                         array( 'addTable', 'category',          'patch-category.sql' ),
  72                         array( 'addTable', 'page',              'patch-page.sql' ),
  73                         array( 'addTable', 'querycachetwo',     'patch-querycachetwo.sql' ),
  74                         array( 'addTable', 'page_props',        'patch-page_props.sql' ),
  75                         array( 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ),
  76                         array( 'addTable', 'profiling',         'patch-profiling.sql' ),
  77                         array( 'addTable', 'protected_titles',  'patch-protected_titles.sql' ),
  78                         array( 'addTable', 'redirect',          'patch-redirect.sql' ),
  79                         array( 'addTable', 'updatelog',         'patch-updatelog.sql' ),
  80                         array( 'addTable', 'change_tag',        'patch-change_tag.sql' ),
  81                         array( 'addTable', 'tag_summary',       'patch-tag_summary.sql' ),
  82                         array( 'addTable', 'valid_tag',         'patch-valid_tag.sql' ),
  83                         array( 'addTable', 'user_properties',   'patch-user_properties.sql' ),
  84                         array( 'addTable', 'log_search',        'patch-log_search.sql' ),
  85                         array( 'addTable', 'l10n_cache',        'patch-l10n_cache.sql' ),
  86                         array( 'addTable', 'iwlinks',           'patch-iwlinks.sql' ),
  87                         array( 'addTable', 'msg_resource',      'patch-msg_resource.sql' ),
  88                         array( 'addTable', 'msg_resource_links','patch-msg_resource_links.sql' ),
  89                         array( 'addTable', 'module_deps',       'patch-module_deps.sql' ),
  90                         array( 'addTable', 'uploadstash',       'patch-uploadstash.sql' ),
  91                         array( 'addTable', 'user_former_groups','patch-user_former_groups.sql' ),
  92                         array( 'addTable', 'external_user',     'patch-external_user.sql' ),
  93                         array( 'addTable', 'sites',             'patch-sites.sql' ),
  94
  95                         # Needed before new field
  96                         array( 'convertArchive2' ),
  97
  98                         # new fields
  99                         array( 'addPgField', 'updatelog',     'ul_value',             'TEXT' ),
 100                         array( 'addPgField', 'archive',       'ar_deleted',           'SMALLINT NOT NULL DEFAULT 0' ),
 101                         array( 'addPgField', 'archive',       'ar_len',               'INTEGER' ),
 102                         array( 'addPgField', 'archive',       'ar_page_id',           'INTEGER' ),
 103                         array( 'addPgField', 'archive',       'ar_parent_id',         'INTEGER' ),
 104                         array( 'addPgField', 'archive',       'ar_content_model',     'TEXT' ),
 105                         array( 'addPgField', 'archive',       'ar_content_format',    'TEXT' ),
 106                         array( 'addPgField', 'categorylinks', 'cl_sortkey_prefix',    "TEXT NOT NULL DEFAULT ''"),
 107                         array( 'addPgField', 'categorylinks', 'cl_collation',         "TEXT NOT NULL DEFAULT 0"),
 108                         array( 'addPgField', 'categorylinks', 'cl_type',              "TEXT NOT NULL DEFAULT 'page'"),
 109                         array( 'addPgField', 'image',         'img_sha1',             "TEXT NOT NULL DEFAULT ''" ),
 110                         array( 'addPgField', 'ipblocks',      'ipb_allow_usertalk',   'SMALLINT NOT NULL DEFAULT 0' ),
 111                         array( 'addPgField', 'ipblocks',      'ipb_anon_only',        'SMALLINT NOT NULL DEFAULT 0' ),
 112                         array( 'addPgField', 'ipblocks',      'ipb_by_text',          "TEXT NOT NULL DEFAULT ''" ),
 113                         array( 'addPgField', 'ipblocks',      'ipb_block_email',      'SMALLINT NOT NULL DEFAULT 0' ),
 114                         array( 'addPgField', 'ipblocks',      'ipb_create_account',   'SMALLINT NOT NULL DEFAULT 1' ),
 115                         array( 'addPgField', 'ipblocks',      'ipb_deleted',          'SMALLINT NOT NULL DEFAULT 0' ),
 116                         array( 'addPgField', 'ipblocks',      'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ),
 117                         array( 'addPgField', 'ipblocks',      'ipb_parent_block_id',            'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ),
 118                         array( 'addPgField', 'filearchive',   'fa_deleted',           'SMALLINT NOT NULL DEFAULT 0' ),
 119                         array( 'addPgField', 'filearchive',   'fa_sha1',              "TEXT NOT NULL DEFAULT ''" ),
 120                         array( 'addPgField', 'logging',       'log_deleted',          'SMALLINT NOT NULL DEFAULT 0' ),
 121                         array( 'addPgField', 'logging',       'log_id',               "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ),
 122                         array( 'addPgField', 'logging',       'log_params',           'TEXT' ),
 123                         array( 'addPgField', 'mwuser',        'user_editcount',       'INTEGER' ),
 124                         array( 'addPgField', 'mwuser',        'user_newpass_time',    'TIMESTAMPTZ' ),
 125                         array( 'addPgField', 'oldimage',      'oi_deleted',           'SMALLINT NOT NULL DEFAULT 0' ),
 126                         array( 'addPgField', 'oldimage',      'oi_major_mime',        "TEXT NOT NULL DEFAULT 'unknown'" ),
 127                         array( 'addPgField', 'oldimage',      'oi_media_type',        'TEXT' ),
 128                         array( 'addPgField', 'oldimage',      'oi_metadata',          "BYTEA NOT NULL DEFAULT ''" ),
 129                         array( 'addPgField', 'oldimage',      'oi_minor_mime',        "TEXT NOT NULL DEFAULT 'unknown'" ),
 130                         array( 'addPgField', 'oldimage',      'oi_sha1',              "TEXT NOT NULL DEFAULT ''" ),
 131                         array( 'addPgField', 'page',          'page_content_model',   'TEXT' ),
 132                         array( 'addPgField', 'page_restrictions', 'pr_id',            "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ),
 133                         array( 'addPgField', 'profiling',     'pf_memory',            'NUMERIC(18,10) NOT NULL DEFAULT 0' ),
 134                         array( 'addPgField', 'recentchanges', 'rc_deleted',           'SMALLINT NOT NULL DEFAULT 0' ),
 135                         array( 'addPgField', 'recentchanges', 'rc_log_action',        'TEXT' ),
 136                         array( 'addPgField', 'recentchanges', 'rc_log_type',          'TEXT' ),
 137                         array( 'addPgField', 'recentchanges', 'rc_logid',             'INTEGER NOT NULL DEFAULT 0' ),
 138                         array( 'addPgField', 'recentchanges', 'rc_new_len',           'INTEGER' ),
 139                         array( 'addPgField', 'recentchanges', 'rc_old_len',           'INTEGER' ),
 140                         array( 'addPgField', 'recentchanges', 'rc_params',            'TEXT' ),
 141                         array( 'addPgField', 'redirect',      'rd_interwiki',         'TEXT NULL' ),
 142                         array( 'addPgField', 'redirect',      'rd_fragment',          'TEXT NULL' ),
 143                         array( 'addPgField', 'revision',      'rev_deleted',          'SMALLINT NOT NULL DEFAULT 0' ),
 144                         array( 'addPgField', 'revision',      'rev_len',              'INTEGER' ),
 145                         array( 'addPgField', 'revision',      'rev_parent_id',        'INTEGER DEFAULT NULL' ),
 146                         array( 'addPgField', 'revision',      'rev_content_model',    'TEXT' ),
 147                         array( 'addPgField', 'revision',      'rev_content_format',   'TEXT' ),
 148                         array( 'addPgField', 'site_stats',    'ss_active_users',      "INTEGER DEFAULT '-1'" ),
 149                         array( 'addPgField', 'user_newtalk',  'user_last_timestamp',  'TIMESTAMPTZ' ),
 150                         array( 'addPgField', 'logging',       'log_user_text',        "TEXT NOT NULL DEFAULT ''" ),
 151                         array( 'addPgField', 'logging',       'log_page',             'INTEGER' ),
 152                         array( 'addPgField', 'interwiki',     'iw_api',               "TEXT NOT NULL DEFAULT ''"),
 153                         array( 'addPgField', 'interwiki',     'iw_wikiid',            "TEXT NOT NULL DEFAULT ''"),
 154                         array( 'addPgField', 'revision',      'rev_sha1',             "TEXT NOT NULL DEFAULT ''" ),
 155                         array( 'addPgField', 'archive',       'ar_sha1',              "TEXT NOT NULL DEFAULT ''" ),
 156                         array( 'addPgField', 'uploadstash',   'us_chunk_inx',         "INTEGER NULL" ),
 157                         array( 'addPgField', 'job',           'job_timestamp',        "TIMESTAMPTZ" ),
 158                         array( 'addPgField', 'job',           'job_random',           "INTEGER NOT NULL DEFAULT 0" ),
 159                         array( 'addPgField', 'job',           'job_attempts',         "INTEGER NOT NULL DEFAULT 0" ),
 160                         array( 'addPgField', 'job',           'job_token',            "TEXT NOT NULL DEFAULT ''" ),
 161                         array( 'addPgField', 'job',           'job_token_timestamp',  "TIMESTAMPTZ" ),
 162                         array( 'addPgField', 'job',           'job_sha1',             "TEXT NOT NULL DEFAULT ''" ),
 163
 164                         # type changes
 165                         array( 'changeField', 'archive',       'ar_deleted',      'smallint', '' ),
 166                         array( 'changeField', 'archive',       'ar_minor_edit',   'smallint', 'ar_minor_edit::smallint DEFAULT 0' ),
 167                         array( 'changeField', 'filearchive',   'fa_deleted',      'smallint', '' ),
 168                         array( 'changeField', 'filearchive',   'fa_height',       'integer',  '' ),
 169                         array( 'changeField', 'filearchive',   'fa_metadata',     'bytea',    "decode(fa_metadata,'escape')" ),
 170                         array( 'changeField', 'filearchive',   'fa_size',         'integer',  '' ),
 171                         array( 'changeField', 'filearchive',   'fa_width',        'integer',  '' ),
 172                         array( 'changeField', 'filearchive',   'fa_storage_group', 'text',     '' ),
 173                         array( 'changeField', 'filearchive',   'fa_storage_key',  'text',     '' ),
 174                         array( 'changeField', 'image',         'img_metadata',    'bytea',    "decode(img_metadata,'escape')" ),
 175                         array( 'changeField', 'image',         'img_size',        'integer',  '' ),
 176                         array( 'changeField', 'image',         'img_width',       'integer',  '' ),
 177                         array( 'changeField', 'image',         'img_height',      'integer',  '' ),
 178                         array( 'changeField', 'interwiki',     'iw_local',        'smallint', 'iw_local::smallint' ),
 179                         array( 'changeField', 'interwiki',     'iw_trans',        'smallint', 'iw_trans::smallint DEFAULT 0' ),
 180                         array( 'changeField', 'ipblocks',      'ipb_auto',        'smallint', 'ipb_auto::smallint DEFAULT 0' ),
 181                         array( 'changeField', 'ipblocks',      'ipb_anon_only',   'smallint', "CASE WHEN ipb_anon_only=' ' THEN 0 ELSE ipb_anon_only::smallint END DEFAULT 0" ),
 182                         array( 'changeField', 'ipblocks',      'ipb_create_account', 'smallint', "CASE WHEN ipb_create_account=' ' THEN 0 ELSE ipb_create_account::smallint END DEFAULT 1" ),
 183                         array( 'changeField', 'ipblocks',      'ipb_enable_autoblock', 'smallint', "CASE WHEN ipb_enable_autoblock=' ' THEN 0 ELSE ipb_enable_autoblock::smallint END DEFAULT 1" ),
 184                         array( 'changeField', 'ipblocks',      'ipb_block_email', 'smallint', "CASE WHEN ipb_block_email=' ' THEN 0 ELSE ipb_block_email::smallint END DEFAULT 0" ),
 185                         array( 'changeField', 'ipblocks',      'ipb_address',     'text',     'ipb_address::text' ),
 186                         array( 'changeField', 'ipblocks',      'ipb_deleted',     'smallint', 'ipb_deleted::smallint DEFAULT 0' ),
 187                         array( 'changeField', 'mwuser',        'user_token',      'text',     '' ),
 188                         array( 'changeField', 'mwuser',        'user_email_token', 'text',     '' ),
 189                         array( 'changeField', 'objectcache',   'keyname',         'text',     '' ),
 190                         array( 'changeField', 'oldimage',      'oi_height',       'integer',  '' ),
 191                         array( 'changeField', 'oldimage',      'oi_metadata',     'bytea',    "decode(img_metadata,'escape')" ),
 192                         array( 'changeField', 'oldimage',      'oi_size',         'integer',  '' ),
 193                         array( 'changeField', 'oldimage',      'oi_width',        'integer',  '' ),
 194                         array( 'changeField', 'page',          'page_is_redirect', 'smallint', 'page_is_redirect::smallint DEFAULT 0' ),
 195                         array( 'changeField', 'page',          'page_is_new',     'smallint', 'page_is_new::smallint DEFAULT 0' ),
 196                         array( 'changeField', 'querycache',    'qc_value',        'integer',  '' ),
 197                         array( 'changeField', 'querycachetwo', 'qcc_value',       'integer',  '' ),
 198                         array( 'changeField', 'recentchanges', 'rc_bot',          'smallint', 'rc_bot::smallint DEFAULT 0' ),
 199                         array( 'changeField', 'recentchanges', 'rc_deleted',      'smallint', '' ),
 200                         array( 'changeField', 'recentchanges', 'rc_minor',        'smallint', 'rc_minor::smallint DEFAULT 0' ),
 201                         array( 'changeField', 'recentchanges', 'rc_new',          'smallint', 'rc_new::smallint DEFAULT 0' ),
 202                         array( 'changeField', 'recentchanges', 'rc_type',         'smallint', 'rc_type::smallint DEFAULT 0' ),
 203                         array( 'changeField', 'recentchanges', 'rc_patrolled',    'smallint', 'rc_patrolled::smallint DEFAULT 0' ),
 204                         array( 'changeField', 'revision',      'rev_deleted',     'smallint', 'rev_deleted::smallint DEFAULT 0' ),
 205                         array( 'changeField', 'revision',      'rev_minor_edit',  'smallint', 'rev_minor_edit::smallint DEFAULT 0' ),
 206                         array( 'changeField', 'templatelinks', 'tl_namespace',    'smallint', 'tl_namespace::smallint' ),
 207                         array( 'changeField', 'user_newtalk',  'user_ip',         'text',     'host(user_ip)' ),
 208                         array( 'changeField', 'uploadstash',   'us_image_bits',   'smallint', '' ),
 209
 210                         # null changes
 211                         array( 'changeNullableField', 'oldimage', 'oi_bits',       'NULL' ),
 212                         array( 'changeNullableField', 'oldimage', 'oi_timestamp',  'NULL' ),
 213                         array( 'changeNullableField', 'oldimage', 'oi_major_mime', 'NULL' ),
 214                         array( 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NULL' ),
 215                         array( 'changeNullableField', 'image', 'img_metadata', 'NOT NULL'),
 216                         array( 'changeNullableField', 'filearchive', 'fa_metadata', 'NOT NULL'),
 217                         array( 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NULL' ),
 218
 219                         array( 'checkOiDeleted' ),
 220
 221                         # New indexes
 222                         array( 'addPgIndex', 'archive',       'archive_user_text',      '(ar_user_text)' ),
 223                         array( 'addPgIndex', 'image',         'img_sha1',               '(img_sha1)' ),
 224                         array( 'addPgIndex', 'ipblocks',      'ipb_parent_block_id',              '(ipb_parent_block_id)' ),
 225                         array( 'addPgIndex', 'oldimage',      'oi_sha1',                '(oi_sha1)' ),
 226                         array( 'addPgIndex', 'page',          'page_mediawiki_title',   '(page_title) WHERE page_namespace = 8' ),
 227                         array( 'addPgIndex', 'pagelinks',     'pagelinks_title',        '(pl_title)' ),
 228                         array( 'addPgIndex', 'page_props',    'pp_propname_page',       '(pp_propname, pp_page)' ),
 229                         array( 'addPgIndex', 'revision',      'rev_text_id_idx',        '(rev_text_id)' ),
 230                         array( 'addPgIndex', 'recentchanges', 'rc_timestamp_bot',       '(rc_timestamp) WHERE rc_bot = 0' ),
 231                         array( 'addPgIndex', 'templatelinks', 'templatelinks_from',     '(tl_from)' ),
 232                         array( 'addPgIndex', 'watchlist',     'wl_user',                '(wl_user)' ),
 233                         array( 'addPgIndex', 'logging',       'logging_user_type_time', '(log_user, log_type, log_timestamp)' ),
 234                         array( 'addPgIndex', 'logging',       'logging_page_id_time',   '(log_page,log_timestamp)' ),
 235                         array( 'addPgIndex', 'iwlinks',       'iwl_prefix_title_from',  '(iwl_prefix, iwl_title, iwl_from)' ),
 236                         array( 'addPgIndex', 'job',           'job_timestamp_idx',      '(job_timestamp)' ),
 237                         array( 'addPgIndex', 'job',           'job_sha1',               '(job_sha1)' ),
 238                         array( 'addPgIndex', 'job',           'job_cmd_token',          '(job_cmd, job_token, job_random)' ),
 239                         array( 'addPgIndex', 'job',           'job_cmd_token_id',       '(job_cmd, job_token, job_id)' ),
 240                         array( 'addPgIndex', 'filearchive',   'fa_sha1',                '(fa_sha1)' ),
 241
 242                         array( 'checkIndex', 'pagelink_unique', array(
 243                                 array( 'pl_from', 'int4_ops', 'btree', 0 ),
 244                                 array( 'pl_namespace', 'int2_ops', 'btree', 0 ),
 245                                 array( 'pl_title', 'text_ops', 'btree', 0 ),
 246                         ),
 247                         'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ),
 248                         array( 'checkIndex', 'cl_sortkey', array(
 249                                 array( 'cl_to', 'text_ops', 'btree', 0 ),
 250                                 array( 'cl_sortkey', 'text_ops', 'btree', 0 ),
 251                                 array( 'cl_from', 'int4_ops', 'btree', 0 ),
 252                         ),
 253                         'CREATE INDEX cl_sortkey ON "categorylinks" USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ),
 254                         array( 'checkIndex', 'logging_times', array(
 255                                 array( 'log_timestamp', 'timestamptz_ops', 'btree', 0 ),
 256                         ),
 257                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ),
 258                         array( 'dropIndex', 'oldimage', 'oi_name' ),
 259                         array( 'checkIndex', 'oi_name_archive_name', array(
 260                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 261                                 array( 'oi_archive_name', 'text_ops', 'btree', 0 ),
 262                         ),
 263                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" USING "btree" ("oi_name", "oi_archive_name")' ),
 264                         array( 'checkIndex', 'oi_name_timestamp', array(
 265                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 266                                 array( 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ),
 267                         ),
 268                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" USING "btree" ("oi_name", "oi_timestamp")' ),
 269                         array( 'checkIndex', 'page_main_title', array(
 270                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 271                         ),
 272                         'CREATE INDEX "page_main_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ),
 273                         array( 'checkIndex', 'page_mediawiki_title', array(
 274                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 275                         ),
 276                         'CREATE INDEX "page_mediawiki_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ),
 277                         array( 'checkIndex', 'page_project_title', array(
 278                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 279                         ),
 280                         'CREATE INDEX "page_project_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 4)' ),
 281                         array( 'checkIndex', 'page_talk_title', array(
 282                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 283                         ),
 284                         'CREATE INDEX "page_talk_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 1)' ),
 285                         array( 'checkIndex', 'page_user_title', array(
 286                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 287                         ),
 288                         'CREATE INDEX "page_user_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 2)' ),
 289                         array( 'checkIndex', 'page_utalk_title', array(
 290                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 291                         ),
 292                         'CREATE INDEX "page_utalk_title" ON "page" USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 3)' ),
 293                         array( 'checkIndex', 'ts2_page_text', array(
 294                                 array( 'textvector', 'tsvector_ops', 'gist', 0 ),
 295                         ),
 296                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ),
 297                         array( 'checkIndex', 'ts2_page_title', array(
 298                                 array( 'titlevector', 'tsvector_ops', 'gist', 0 ),
 299                         ),
 300                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ),
 301
 302                         array( 'checkOiNameConstraint' ),
 303                         array( 'checkPageDeletedTrigger' ),
 304                         array( 'checkRevUserFkey' ),
 305                         array( 'dropIndex', 'ipblocks', 'ipb_address'),
 306                         array( 'checkIndex', 'ipb_address_unique', array(
 307                                 array( 'ipb_address', 'text_ops', 'btree', 0 ),
 308                                 array( 'ipb_user',    'int4_ops', 'btree', 0 ),
 309                                 array( 'ipb_auto',    'int2_ops', 'btree', 0 ),
 310                                 array( 'ipb_anon_only', 'int2_ops', 'btree', 0 ),
 311                         ),
 312                         'CREATE UNIQUE INDEX ipb_address_unique ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ),
 313
 314                         array( 'checkIwlPrefix' ),
 315
 316                         # All FK columns should be deferred
 317                         array( 'changeFkeyDeferrable', 'archive',          'ar_user',         'mwuser(user_id) ON DELETE SET NULL' ),
 318                         array( 'changeFkeyDeferrable', 'categorylinks',    'cl_from',         'page(page_id) ON DELETE CASCADE' ),
 319                         array( 'changeFkeyDeferrable', 'externallinks',    'el_from',         'page(page_id) ON DELETE CASCADE' ),
 320                         array( 'changeFkeyDeferrable', 'filearchive',      'fa_deleted_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 321                         array( 'changeFkeyDeferrable', 'filearchive',      'fa_user',         'mwuser(user_id) ON DELETE SET NULL' ),
 322                         array( 'changeFkeyDeferrable', 'image',            'img_user',        'mwuser(user_id) ON DELETE SET NULL' ),
 323                         array( 'changeFkeyDeferrable', 'imagelinks',       'il_from',         'page(page_id) ON DELETE CASCADE' ),
 324                         array( 'changeFkeyDeferrable', 'ipblocks',         'ipb_by',          'mwuser(user_id) ON DELETE CASCADE' ),
 325                         array( 'changeFkeyDeferrable', 'ipblocks',         'ipb_user',        'mwuser(user_id) ON DELETE SET NULL' ),
 326                         array( 'changeFkeyDeferrable', 'ipblocks',         'ipb_parent_block_id',       'ipblocks(ipb_id) ON DELETE SET NULL' ),
 327                         array( 'changeFkeyDeferrable', 'langlinks',        'll_from',         'page(page_id) ON DELETE CASCADE' ),
 328                         array( 'changeFkeyDeferrable', 'logging',          'log_user',        'mwuser(user_id) ON DELETE SET NULL' ),
 329                         array( 'changeFkeyDeferrable', 'oldimage',         'oi_name',         'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ),
 330                         array( 'changeFkeyDeferrable', 'oldimage',         'oi_user',         'mwuser(user_id) ON DELETE SET NULL' ),
 331                         array( 'changeFkeyDeferrable', 'pagelinks',        'pl_from',         'page(page_id) ON DELETE CASCADE' ),
 332                         array( 'changeFkeyDeferrable', 'page_props',       'pp_page',         'page (page_id) ON DELETE CASCADE' ),
 333                         array( 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',         'page(page_id) ON DELETE CASCADE' ),
 334                         array( 'changeFkeyDeferrable', 'protected_titles', 'pt_user',         'mwuser(user_id) ON DELETE SET NULL' ),
 335                         array( 'changeFkeyDeferrable', 'recentchanges',    'rc_cur_id',       'page(page_id) ON DELETE SET NULL' ),
 336                         array( 'changeFkeyDeferrable', 'recentchanges',    'rc_user',         'mwuser(user_id) ON DELETE SET NULL' ),
 337                         array( 'changeFkeyDeferrable', 'redirect',         'rd_from',         'page(page_id) ON DELETE CASCADE' ),
 338                         array( 'changeFkeyDeferrable', 'revision',         'rev_page',        'page (page_id) ON DELETE CASCADE' ),
 339                         array( 'changeFkeyDeferrable', 'revision',         'rev_user',        'mwuser(user_id) ON DELETE RESTRICT' ),
 340                         array( 'changeFkeyDeferrable', 'templatelinks',    'tl_from',         'page(page_id) ON DELETE CASCADE' ),
 341                         array( 'changeFkeyDeferrable', 'user_groups',      'ug_user',         'mwuser(user_id) ON DELETE CASCADE' ),
 342                         array( 'changeFkeyDeferrable', 'user_newtalk',     'user_id',         'mwuser(user_id) ON DELETE CASCADE' ),
 343                         array( 'changeFkeyDeferrable', 'user_properties',  'up_user',         'mwuser(user_id) ON DELETE CASCADE' ),
 344                         array( 'changeFkeyDeferrable', 'watchlist',        'wl_user',         'mwuser(user_id) ON DELETE CASCADE' ),
 345
 346                         # r81574
 347                         array( 'addInterwikiType' ),
 348                         # end
 349                         array( 'tsearchFixes' ),
 350                 );
 351         }
 352
 353         protected function getOldGlobalUpdates() {
 354                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 355
 356                 $updates = array();
 357
 358                 # Add missing extension tables
 359                 foreach ( $wgExtNewTables as $tableRecord ) {
 360                         $updates[] = array(
 361                                 'addTable', $tableRecord[0], $tableRecord[1], true
 362                         );
 363                 }
 364
 365                 # Add missing extension fields
 366                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 367                         $updates[] = array(
 368                                         'addPgField', $fieldRecord[0], $fieldRecord[1],
 369                                         $fieldRecord[2]
 370                                 );
 371                 }
 372
 373                 # Change altered columns
 374                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 375                         $updates[] = array(
 376                                         'changeField', $fieldRecord[0], $fieldRecord[1],
 377                                         $fieldRecord[2]
 378                                 );
 379                 }
 380
 381                 # Add missing extension indexes
 382                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 383                         $updates[] = array(
 384                                         'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 385                                         $fieldRecord[2]
 386                                 );
 387                 }
 388
 389                 return $updates;
 390         }
 391
 392         protected function describeTable( $table ) {
 393                 $q = <<<END
 394 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 395         WHERE pg_class.relnamespace = pg_namespace.oid
 396           AND attrelid=pg_class.oid AND attnum > 0
 397           AND relname=%s AND nspname=%s
 398 END;
 399                 $res = $this->db->query( sprintf( $q,
 400                                 $this->db->addQuotes( $table ),
 401                                 $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 402                 if ( !$res ) {
 403                         return null;
 404                 }
 405
 406                 $cols = array();
 407                 foreach ( $res as $r ) {
 408                         $cols[] = array(
 409                                         "name" => $r[0],
 410                                         "ord" => $r[1],
 411                                 );
 412                 }
 413                 return $cols;
 414         }
 415
 416         function describeIndex( $idx ) {
 417                 // first fetch the key (which is a list of columns ords) and
 418                 // the table the index applies to (an oid)
 419                 $q = <<<END
 420 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 421         WHERE nspname=%s
 422           AND pg_class.relnamespace = pg_namespace.oid
 423           AND relname=%s
 424           AND indexrelid=pg_class.oid
 425 END;
 426                 $res = $this->db->query(
 427                         sprintf(
 428                                 $q,
 429                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 430                                 $this->db->addQuotes( $idx )
 431                         )
 432                 );
 433                 if ( !$res ) {
 434                         return null;
 435                 }
 436                 if ( !( $r = $this->db->fetchRow( $res ) ) ) {
 437                         return null;
 438                 }
 439
 440                 $indkey = $r[0];
 441                 $relid = intval( $r[1] );
 442                 $indkeys = explode( ' ', $indkey );
 443
 444                 $colnames = array();
 445                 foreach ( $indkeys as $rid ) {
 446                         $query = <<<END
 447 SELECT attname FROM pg_class, pg_attribute
 448         WHERE attrelid=$relid
 449           AND attnum=%d
 450           AND attrelid=pg_class.oid
 451 END;
 452                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 453                         if ( !$r2 ) {
 454                                 return null;
 455                         }
 456                         if ( !( $row2 = $this->db->fetchRow( $r2 ) ) ) {
 457                                 return null;
 458                         }
 459                         $colnames[] = $row2[0];
 460                 }
 461
 462                 return $colnames;
 463         }
 464
 465         function fkeyDeltype( $fkey ) {
 466                 $q = <<<END
 467 SELECT confdeltype FROM pg_constraint, pg_namespace
 468         WHERE connamespace=pg_namespace.oid
 469           AND nspname=%s
 470           AND conname=%s;
 471 END;
 472                 $r = $this->db->query(
 473                         sprintf(
 474                                 $q,
 475                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 476                                 $this->db->addQuotes( $fkey )
 477                         )
 478                 );
 479                 if ( !( $row = $this->db->fetchRow( $r ) ) ) {
 480                         return null;
 481                 }
 482                 return $row[0];
 483         }
 484
 485         function ruleDef( $table, $rule ) {
 486         $q = <<<END
 487 SELECT definition FROM pg_rules
 488         WHERE schemaname = %s
 489           AND tablename = %s
 490           AND rulename = %s
 491 END;
 492                 $r = $this->db->query(
 493                         sprintf(
 494                                 $q,
 495                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 496                                 $this->db->addQuotes( $table ),
 497                                 $this->db->addQuotes( $rule )
 498                         )
 499                 );
 500                 $row = $this->db->fetchRow( $r );
 501                 if ( !$row ) {
 502                         return null;
 503                 }
 504                 $d = $row[0];
 505                 return $d;
 506         }
 507
 508         protected function addSequence( $table, $pkey, $ns ) {
 509                 if ( !$this->db->sequenceExists( $ns ) ) {
 510                         $this->output( "Creating sequence $ns\n" );
 511                         $this->db->query( "CREATE SEQUENCE $ns" );
 512                         if( $pkey !== false ) {
 513                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 514                         }
 515                 }
 516         }
 517
 518         protected function renameSequence( $old, $new ) {
 519                 if ( $this->db->sequenceExists( $new ) ) {
 520                         $this->output( "...sequence $new already exists.\n" );
 521                         return;
 522                 }
 523                 if ( $this->db->sequenceExists( $old ) ) {
 524                         $this->output( "Renaming sequence $old to $new\n" );
 525                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 526                 }
 527         }
 528
 529         protected function renameTable( $old, $new, $patch = false ) {
 530                 if ( $this->db->tableExists( $old ) ) {
 531                         $this->output( "Renaming table $old to $new\n" );
 532                         $old = $this->db->realTableName( $old, "quoted" );
 533                         $new = $this->db->realTableName( $new, "quoted" );
 534                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 535                         if( $patch !== false ) {
 536                                 $this->applyPatch( $patch );
 537                         }
 538                 }
 539         }
 540
 541         protected function renameIndex(
 542                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 543         ) {
 544                 // First requirement: the table must exist
 545                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 546                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 547                         return;
 548                 }
 549
 550                 // Second requirement: the new index must be missing
 551                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 552                         $this->output( "...index $new already set on $table table.\n" );
 553                         if ( !$skipBothIndexExistWarning
 554                                 && $this->db->indexExists( $table, $old, __METHOD__ ) )
 555                         {
 556                                 $this->output( "...WARNING: $old still exists, despite it has been renamed into $new (which also exists).\n" .
 557                                         "            $old should be manually removed if not needed anymore.\n" );
 558                         }
 559                         return;
 560                 }
 561
 562                 // Third requirement: the old index must exist
 563                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 564                         $this->output( "...skipping: index $old doesn't exist.\n" );
 565                         return;
 566                 }
 567
 568                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 569         }
 570
 571         protected function addPgField( $table, $field, $type ) {
 572                 $fi = $this->db->fieldInfo( $table, $field );
 573                 if ( !is_null( $fi ) ) {
 574                         $this->output( "...column '$table.$field' already exists\n" );
 575                         return;
 576                 } else {
 577                         $this->output( "Adding column '$table.$field'\n" );
 578                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 579                 }
 580         }
 581
 582         protected function changeField( $table, $field, $newtype, $default ) {
 583                 $fi = $this->db->fieldInfo( $table, $field );
 584                 if ( is_null( $fi ) ) {
 585                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 586                         exit( 1 );
 587                 }
 588
 589                 if ( $fi->type() === $newtype )
 590                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 591                 else {
 592                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 593                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 594                         if ( strlen( $default ) ) {
 595                                 $res = array();
 596                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 597                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 598                                         $this->db->query( $sqldef );
 599                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 600                                 }
 601                                 $sql .= " USING $default";
 602                         }
 603                         $this->db->query( $sql );
 604                 }
 605         }
 606
 607         protected function setDefault( $table, $field, $default ) {
 608
 609                 $info = $this->db->fieldInfo( $table, $field );
 610                 if ( $info->defaultValue() !== $default ) {
 611                         $this->output( "Changing '$table.$field' default value\n" );
 612                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 613                 }
 614         }
 615
 616         protected function changeNullableField( $table, $field, $null ) {
 617                 $fi = $this->db->fieldInfo( $table, $field );
 618                 if ( is_null( $fi ) ) {
 619                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 620                         exit( 1 );
 621                 }
 622                 if ( $fi->isNullable() ) {
 623                         # # It's NULL - does it need to be NOT NULL?
 624                         if ( 'NOT NULL' === $null ) {
 625                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 626                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 627                         } else {
 628                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 629                         }
 630                 } else {
 631                         # # It's NOT NULL - does it need to be NULL?
 632                         if ( 'NULL' === $null ) {
 633                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 634                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 635                         }
 636                         else {
 637                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 638                         }
 639                 }
 640         }
 641
 642         public function addPgIndex( $table, $index, $type ) {
 643                 if ( $this->db->indexExists( $table, $index ) ) {
 644                         $this->output( "...index '$index' on table '$table' already exists\n" );
 645                 } else {
 646                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 647                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 648                 }
 649         }
 650
 651         public function addPgExtIndex( $table, $index, $type ) {
 652                 if ( $this->db->indexExists( $table, $index ) ) {
 653                         $this->output( "...index '$index' on table '$table' already exists\n" );
 654                 } else {
 655                         if ( preg_match( '/^\(/', $type ) ) {
 656                                 $this->output( "Creating index '$index' on table '$table'\n" );
 657                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 658                         } else {
 659                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 660                         }
 661                 }
 662         }
 663
 664         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 665                 $fi = $this->db->fieldInfo( $table, $field );
 666                 if ( is_null( $fi ) ) {
 667                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! Please report this.\n" );
 668                         return;
 669                 }
 670                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 671                         return;
 672                 }
 673                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 674                 $conname = $fi->conname();
 675                 if ( $fi->conname() ) {
 676                         $conclause = "CONSTRAINT \"$conname\"";
 677                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 678                         $this->db->query( $command );
 679                 } else {
 680                         $this->output( "Column '$table.$field' does not have a foreign key constraint, will be added\n" );
 681                         $conclause = "";
 682                 }
 683                 $command = "ALTER TABLE $table ADD $conclause FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 684                 $this->db->query( $command );
 685         }
 686
 687         protected function convertArchive2() {
 688                 if ( $this->db->tableExists( "archive2" ) ) {
 689                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 690                                 $this->output( "Dropping rule 'archive_insert'\n" );
 691                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 692                         }
 693                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 694                                 $this->output( "Dropping rule 'archive_delete'\n" );
 695                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 696                         }
 697                         $this->applyPatch( 'patch-remove-archive2.sql', false, "Converting 'archive2' back to normal archive table" );
 698                 } else {
 699                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 700                 }
 701         }
 702
 703         protected function checkOiDeleted() {
 704                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 705                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 706                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 707                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 708                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 709                 } else {
 710                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 711                 }
 712         }
 713
 714         protected function checkOiNameConstraint() {
 715                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 716                         $this->output( "...table 'oldimage' has correct cascading delete/update foreign key to image\n" );
 717                 } else {
 718                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 719                                 $this->db->query( "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 720                         }
 721                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 722                                 $this->db->query( "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 723                         }
 724                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 725                         $this->db->query( "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 726                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) ON DELETE CASCADE ON UPDATE CASCADE" );
 727                 }
 728         }
 729
 730         protected function checkPageDeletedTrigger() {
 731                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 732                         $this->applyPatch( 'patch-page_deleted.sql', false, "Adding function and trigger 'page_deleted' to table 'page'" );
 733                 } else {
 734                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 735                 }
 736         }
 737
 738         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 739                 if ( $this->db->indexExists( $table, $index ) ) {
 740                         $this->output( "Dropping obsolete index '$index'\n" );
 741                         $this->db->query( "DROP INDEX \"". $index ."\"" );
 742                 }
 743         }
 744
 745         protected function checkIndex( $index, $should_be, $good_def ) {
 746                 $pu = $this->db->indexAttributes( $index );
 747                 if ( !empty( $pu ) && $pu != $should_be ) {
 748                         $this->output( "Dropping obsolete version of index '$index'\n" );
 749                         $this->db->query( "DROP INDEX \"". $index ."\"" );
 750                         $pu = array();
 751                 } else {
 752                         $this->output( "...no need to drop index '$index'\n" );
 753                 }
 754
 755                 if ( empty( $pu ) ) {
 756                         $this->output( "Creating index '$index'\n" );
 757                         $this->db->query( $good_def );
 758                 } else {
 759                         $this->output( "...index '$index' exists\n" );
 760                 }
 761         }
 762
 763         protected function checkRevUserFkey() {
 764                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 765                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 766                 } else {
 767                         $this->applyPatch( 'patch-revision_rev_user_fkey.sql', false, "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT" );
 768                 }
 769         }
 770
 771         protected function checkIwlPrefix() {
 772                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 773                         $this->applyPatch( 'patch-rename-iwl_prefix.sql', false, "Replacing index 'iwl_prefix' with 'iwl_prefix_from_title'" );
 774                 }
 775         }
 776
 777         protected function addInterwikiType() {
 778                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 779         }
 780
 781         protected function tsearchFixes() {
 782                 # Tweak the page_title tsearch2 trigger to filter out slashes
 783                 # This is create or replace, so harmless to call if not needed
 784                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 785
 786                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 787                 # in case they have the old 'default' versions
 788                 # Gather version numbers in case we need them
 789                 if ( $this->db->getServerVersion() >= 8.3 ) {
 790                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 791                 }
 792         }
 793 }