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 use Wikimedia\Rdbms\DatabasePostgres;
  25
  26 /**
  27  * Class for handling updates to Postgres databases.
  28  *
  29  * @ingroup Deployment
  30  * @since 1.17
  31  */
  32 class PostgresUpdater extends DatabaseUpdater {
  33
  34         /**
  35          * @var DatabasePostgres
  36          */
  37         protected $db;
  38
  39         /**
  40          * @todo FIXME: Postgres should use sequential updates like Mysql, Sqlite
  41          * and everybody else. It never got refactored like it should've.
  42          * @return array
  43          */
  44         protected function getCoreUpdateList() {
  45                 return [
  46                         # rename tables 1.7.3
  47                         # r15791 Change reserved word table names "user" and "text"
  48                         [ 'renameTable', 'user', 'mwuser' ],
  49                         [ 'renameTable', 'text', 'pagecontent' ],
  50                         [ 'renameIndex', 'mwuser', 'user_pkey', 'mwuser_pkey' ],
  51                         [ 'renameIndex', 'mwuser', 'user_user_name_key', 'mwuser_user_name_key' ],
  52                         [ 'renameIndex', 'pagecontent', 'text_pkey', 'pagecontent_pkey' ],
  53
  54                         # renamed sequences
  55                         [ 'renameSequence', 'ipblocks_ipb_id_val', 'ipblocks_ipb_id_seq' ],
  56                         [ 'renameSequence', 'rev_rev_id_val', 'revision_rev_id_seq' ],
  57                         [ 'renameSequence', 'text_old_id_val', 'text_old_id_seq' ],
  58                         [ 'renameSequence', 'rc_rc_id_seq', 'recentchanges_rc_id_seq' ],
  59                         [ 'renameSequence', 'log_log_id_seq', 'logging_log_id_seq' ],
  60                         [ 'renameSequence', 'pr_id_val', 'page_restrictions_pr_id_seq' ],
  61                         [ 'renameSequence', 'us_id_seq', 'uploadstash_us_id_seq' ],
  62
  63                         # since r58263
  64                         [ 'renameSequence', 'category_id_seq', 'category_cat_id_seq' ],
  65
  66                         # new sequences if not renamed above
  67                         [ 'addSequence', 'logging', false, 'logging_log_id_seq' ],
  68                         [ 'addSequence', 'page_restrictions', false, 'page_restrictions_pr_id_seq' ],
  69                         [ 'addSequence', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ],
  70                         [ 'addSequence', 'archive', false, 'archive_ar_id_seq' ],
  71                         [ 'addSequence', 'externallinks', false, 'externallinks_el_id_seq' ],
  72                         [ 'addSequence', 'watchlist', false, 'watchlist_wl_id_seq' ],
  73                         [ 'addSequence', 'change_tag', false, 'change_tag_ct_id_seq' ],
  74
  75                         # new tables
  76                         [ 'addTable', 'category', 'patch-category.sql' ],
  77                         [ 'addTable', 'page', 'patch-page.sql' ],
  78                         [ 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ],
  79                         [ 'addTable', 'page_props', 'patch-page_props.sql' ],
  80                         [ 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ],
  81                         [ 'addTable', 'profiling', 'patch-profiling.sql' ],
  82                         [ 'addTable', 'protected_titles', 'patch-protected_titles.sql' ],
  83                         [ 'addTable', 'redirect', 'patch-redirect.sql' ],
  84                         [ 'addTable', 'updatelog', 'patch-updatelog.sql' ],
  85                         [ 'addTable', 'change_tag', 'patch-change_tag.sql' ],
  86                         [ 'addTable', 'user_properties', 'patch-user_properties.sql' ],
  87                         [ 'addTable', 'log_search', 'patch-log_search.sql' ],
  88                         [ 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ],
  89                         [ 'addTable', 'iwlinks', 'patch-iwlinks.sql' ],
  90                         [ 'addTable', 'module_deps', 'patch-module_deps.sql' ],
  91                         [ 'addTable', 'uploadstash', 'patch-uploadstash.sql' ],
  92                         [ 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ],
  93                         [ 'addTable', 'sites', 'patch-sites.sql' ],
  94                         [ 'addTable', 'bot_passwords', 'patch-bot_passwords.sql' ],
  95
  96                         # Needed before new field
  97                         [ 'convertArchive2' ],
  98
  99                         # new fields
 100                         [ 'addPgField', 'updatelog', 'ul_value', 'TEXT' ],
 101                         [ 'addPgField', 'archive', 'ar_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 102                         [ 'addPgField', 'archive', 'ar_len', 'INTEGER' ],
 103                         [ 'addPgField', 'archive', 'ar_page_id', 'INTEGER' ],
 104                         [ 'addPgField', 'archive', 'ar_parent_id', 'INTEGER' ],
 105                         [ 'addPgField', 'archive', 'ar_content_model', 'TEXT' ],
 106                         [ 'addPgField', 'archive', 'ar_content_format', 'TEXT' ],
 107                         [ 'addPgField', 'categorylinks', 'cl_sortkey_prefix', "TEXT NOT NULL DEFAULT ''" ],
 108                         [ 'addPgField', 'categorylinks', 'cl_collation', "TEXT NOT NULL DEFAULT 0" ],
 109                         [ 'addPgField', 'categorylinks', 'cl_type', "TEXT NOT NULL DEFAULT 'page'" ],
 110                         [ 'addPgField', 'image', 'img_sha1', "TEXT NOT NULL DEFAULT ''" ],
 111                         [ 'addPgField', 'ipblocks', 'ipb_allow_usertalk', 'SMALLINT NOT NULL DEFAULT 0' ],
 112                         [ 'addPgField', 'ipblocks', 'ipb_anon_only', 'SMALLINT NOT NULL DEFAULT 0' ],
 113                         [ 'addPgField', 'ipblocks', 'ipb_by_text', "TEXT NOT NULL DEFAULT ''" ],
 114                         [ 'addPgField', 'ipblocks', 'ipb_block_email', 'SMALLINT NOT NULL DEFAULT 0' ],
 115                         [ 'addPgField', 'ipblocks', 'ipb_create_account', 'SMALLINT NOT NULL DEFAULT 1' ],
 116                         [ 'addPgField', 'ipblocks', 'ipb_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 117                         [ 'addPgField', 'ipblocks', 'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ],
 118                         [ 'addPgField', 'ipblocks', 'ipb_parent_block_id',
 119                                 'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ' .
 120                                 'ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ],
 121                         [ 'addPgField', 'filearchive', 'fa_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 122                         [ 'addPgField', 'filearchive', 'fa_sha1', "TEXT NOT NULL DEFAULT ''" ],
 123                         [ 'addPgField', 'logging', 'log_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 124                         [ 'addPgField', 'logging', 'log_id',
 125                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ],
 126                         [ 'addPgField', 'logging', 'log_params', 'TEXT' ],
 127                         [ 'addPgField', 'mwuser', 'user_editcount', 'INTEGER' ],
 128                         [ 'addPgField', 'mwuser', 'user_newpass_time', 'TIMESTAMPTZ' ],
 129                         [ 'addPgField', 'oldimage', 'oi_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 130                         [ 'addPgField', 'oldimage', 'oi_major_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 131                         [ 'addPgField', 'oldimage', 'oi_media_type', 'TEXT' ],
 132                         [ 'addPgField', 'oldimage', 'oi_metadata', "BYTEA NOT NULL DEFAULT ''" ],
 133                         [ 'addPgField', 'oldimage', 'oi_minor_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 134                         [ 'addPgField', 'oldimage', 'oi_sha1', "TEXT NOT NULL DEFAULT ''" ],
 135                         [ 'addPgField', 'page', 'page_content_model', 'TEXT' ],
 136                         [ 'addPgField', 'page_restrictions', 'pr_id',
 137                                 "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ],
 138                         [ 'addPgField', 'profiling', 'pf_memory', 'NUMERIC(18,10) NOT NULL DEFAULT 0' ],
 139                         [ 'addPgField', 'recentchanges', 'rc_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 140                         [ 'addPgField', 'recentchanges', 'rc_log_action', 'TEXT' ],
 141                         [ 'addPgField', 'recentchanges', 'rc_log_type', 'TEXT' ],
 142                         [ 'addPgField', 'recentchanges', 'rc_logid', 'INTEGER NOT NULL DEFAULT 0' ],
 143                         [ 'addPgField', 'recentchanges', 'rc_new_len', 'INTEGER' ],
 144                         [ 'addPgField', 'recentchanges', 'rc_old_len', 'INTEGER' ],
 145                         [ 'addPgField', 'recentchanges', 'rc_params', 'TEXT' ],
 146                         [ 'addPgField', 'redirect', 'rd_interwiki', 'TEXT NULL' ],
 147                         [ 'addPgField', 'redirect', 'rd_fragment', 'TEXT NULL' ],
 148                         [ 'addPgField', 'revision', 'rev_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 149                         [ 'addPgField', 'revision', 'rev_len', 'INTEGER' ],
 150                         [ 'addPgField', 'revision', 'rev_parent_id', 'INTEGER DEFAULT NULL' ],
 151                         [ 'addPgField', 'revision', 'rev_content_model', 'TEXT' ],
 152                         [ 'addPgField', 'revision', 'rev_content_format', 'TEXT' ],
 153                         [ 'addPgField', 'site_stats', 'ss_active_users', "INTEGER DEFAULT '-1'" ],
 154                         [ 'addPgField', 'user_newtalk', 'user_last_timestamp', 'TIMESTAMPTZ' ],
 155                         [ 'addPgField', 'logging', 'log_user_text', "TEXT NOT NULL DEFAULT ''" ],
 156                         [ 'addPgField', 'logging', 'log_page', 'INTEGER' ],
 157                         [ 'addPgField', 'interwiki', 'iw_api', "TEXT NOT NULL DEFAULT ''" ],
 158                         [ 'addPgField', 'interwiki', 'iw_wikiid', "TEXT NOT NULL DEFAULT ''" ],
 159                         [ 'addPgField', 'revision', 'rev_sha1', "TEXT NOT NULL DEFAULT ''" ],
 160                         [ 'addPgField', 'archive', 'ar_sha1', "TEXT NOT NULL DEFAULT ''" ],
 161                         [ 'addPgField', 'uploadstash', 'us_chunk_inx', "INTEGER NULL" ],
 162                         [ 'addPgField', 'job', 'job_timestamp', "TIMESTAMPTZ" ],
 163                         [ 'addPgField', 'job', 'job_random', "INTEGER NOT NULL DEFAULT 0" ],
 164                         [ 'addPgField', 'job', 'job_attempts', "INTEGER NOT NULL DEFAULT 0" ],
 165                         [ 'addPgField', 'job', 'job_token', "TEXT NOT NULL DEFAULT ''" ],
 166                         [ 'addPgField', 'job', 'job_token_timestamp', "TIMESTAMPTZ" ],
 167                         [ 'addPgField', 'job', 'job_sha1', "TEXT NOT NULL DEFAULT ''" ],
 168                         [ 'addPgField', 'archive', 'ar_id',
 169                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('archive_ar_id_seq')" ],
 170                         [ 'addPgField', 'externallinks', 'el_id',
 171                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('externallinks_el_id_seq')" ],
 172                         [ 'addPgField', 'uploadstash', 'us_props', "BYTEA" ],
 173
 174                         # type changes
 175                         [ 'changeField', 'archive', 'ar_deleted', 'smallint', '' ],
 176                         [ 'changeField', 'archive', 'ar_minor_edit', 'smallint',
 177                                 'ar_minor_edit::smallint DEFAULT 0' ],
 178                         [ 'changeField', 'filearchive', 'fa_deleted', 'smallint', '' ],
 179                         [ 'changeField', 'filearchive', 'fa_height', 'integer', '' ],
 180                         [ 'changeField', 'filearchive', 'fa_metadata', 'bytea', "decode(fa_metadata,'escape')" ],
 181                         [ 'changeField', 'filearchive', 'fa_size', 'integer', '' ],
 182                         [ 'changeField', 'filearchive', 'fa_width', 'integer', '' ],
 183                         [ 'changeField', 'filearchive', 'fa_storage_group', 'text', '' ],
 184                         [ 'changeField', 'filearchive', 'fa_storage_key', 'text', '' ],
 185                         [ 'changeField', 'image', 'img_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 186                         [ 'changeField', 'image', 'img_size', 'integer', '' ],
 187                         [ 'changeField', 'image', 'img_width', 'integer', '' ],
 188                         [ 'changeField', 'image', 'img_height', 'integer', '' ],
 189                         [ 'changeField', 'interwiki', 'iw_local', 'smallint', 'iw_local::smallint' ],
 190                         [ 'changeField', 'interwiki', 'iw_trans', 'smallint', 'iw_trans::smallint DEFAULT 0' ],
 191                         [ 'changeField', 'ipblocks', 'ipb_auto', 'smallint', 'ipb_auto::smallint DEFAULT 0' ],
 192                         [ 'changeField', 'ipblocks', 'ipb_anon_only', 'smallint',
 193                                 "CASE WHEN ipb_anon_only=' ' THEN 0 ELSE ipb_anon_only::smallint END DEFAULT 0" ],
 194                         [ 'changeField', 'ipblocks', 'ipb_create_account', 'smallint',
 195                                 "CASE WHEN ipb_create_account=' ' THEN 0 ELSE ipb_create_account::smallint END DEFAULT 1" ],
 196                         [ 'changeField', 'ipblocks', 'ipb_enable_autoblock', 'smallint',
 197                                 "CASE WHEN ipb_enable_autoblock=' ' THEN 0 ELSE ipb_enable_autoblock::smallint END DEFAULT 1" ],
 198                         [ 'changeField', 'ipblocks', 'ipb_block_email', 'smallint',
 199                                 "CASE WHEN ipb_block_email=' ' THEN 0 ELSE ipb_block_email::smallint END DEFAULT 0" ],
 200                         [ 'changeField', 'ipblocks', 'ipb_address', 'text', 'ipb_address::text' ],
 201                         [ 'changeField', 'ipblocks', 'ipb_deleted', 'smallint', 'ipb_deleted::smallint DEFAULT 0' ],
 202                         [ 'changeField', 'mwuser', 'user_token', 'text', '' ],
 203                         [ 'changeField', 'mwuser', 'user_email_token', 'text', '' ],
 204                         [ 'changeField', 'objectcache', 'keyname', 'text', '' ],
 205                         [ 'changeField', 'oldimage', 'oi_height', 'integer', '' ],
 206                         [ 'changeField', 'oldimage', 'oi_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 207                         [ 'changeField', 'oldimage', 'oi_size', 'integer', '' ],
 208                         [ 'changeField', 'oldimage', 'oi_width', 'integer', '' ],
 209                         [ 'changeField', 'page', 'page_is_redirect', 'smallint',
 210                                 'page_is_redirect::smallint DEFAULT 0' ],
 211                         [ 'changeField', 'page', 'page_is_new', 'smallint', 'page_is_new::smallint DEFAULT 0' ],
 212                         [ 'changeField', 'querycache', 'qc_value', 'integer', '' ],
 213                         [ 'changeField', 'querycachetwo', 'qcc_value', 'integer', '' ],
 214                         [ 'changeField', 'recentchanges', 'rc_bot', 'smallint', 'rc_bot::smallint DEFAULT 0' ],
 215                         [ 'changeField', 'recentchanges', 'rc_deleted', 'smallint', '' ],
 216                         [ 'changeField', 'recentchanges', 'rc_minor', 'smallint', 'rc_minor::smallint DEFAULT 0' ],
 217                         [ 'changeField', 'recentchanges', 'rc_new', 'smallint', 'rc_new::smallint DEFAULT 0' ],
 218                         [ 'changeField', 'recentchanges', 'rc_type', 'smallint', 'rc_type::smallint DEFAULT 0' ],
 219                         [ 'changeField', 'recentchanges', 'rc_patrolled', 'smallint',
 220                                 'rc_patrolled::smallint DEFAULT 0' ],
 221                         [ 'changeField', 'revision', 'rev_deleted', 'smallint', 'rev_deleted::smallint DEFAULT 0' ],
 222                         [ 'changeField', 'revision', 'rev_minor_edit', 'smallint',
 223                                 'rev_minor_edit::smallint DEFAULT 0' ],
 224                         [ 'changeField', 'templatelinks', 'tl_namespace', 'smallint', 'tl_namespace::smallint' ],
 225                         [ 'changeField', 'user_newtalk', 'user_ip', 'text', 'host(user_ip)' ],
 226                         [ 'changeField', 'uploadstash', 'us_image_bits', 'smallint', '' ],
 227                         [ 'changeField', 'profiling', 'pf_time', 'float', '' ],
 228                         [ 'changeField', 'profiling', 'pf_memory', 'float', '' ],
 229
 230                         # null changes
 231                         [ 'changeNullableField', 'oldimage', 'oi_bits', 'NULL' ],
 232                         [ 'changeNullableField', 'oldimage', 'oi_timestamp', 'NULL' ],
 233                         [ 'changeNullableField', 'oldimage', 'oi_major_mime', 'NULL' ],
 234                         [ 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NULL' ],
 235                         [ 'changeNullableField', 'image', 'img_metadata', 'NOT NULL' ],
 236                         [ 'changeNullableField', 'filearchive', 'fa_metadata', 'NOT NULL' ],
 237                         [ 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NULL' ],
 238                         [ 'changeNullableField', 'recentchanges', 'rc_cur_time', 'NULL' ],
 239
 240                         [ 'checkOiDeleted' ],
 241
 242                         # New indexes
 243                         [ 'addPgIndex', 'archive', 'archive_user_text', '(ar_user_text)' ],
 244                         [ 'addPgIndex', 'image', 'img_sha1', '(img_sha1)' ],
 245                         [ 'addPgIndex', 'ipblocks', 'ipb_parent_block_id', '(ipb_parent_block_id)' ],
 246                         [ 'addPgIndex', 'oldimage', 'oi_sha1', '(oi_sha1)' ],
 247                         [ 'addPgIndex', 'page', 'page_mediawiki_title', '(page_title) WHERE page_namespace = 8' ],
 248                         [ 'addPgIndex', 'pagelinks', 'pagelinks_title', '(pl_title)' ],
 249                         [ 'addPgIndex', 'page_props', 'pp_propname_page', '(pp_propname, pp_page)' ],
 250                         [ 'addPgIndex', 'revision', 'rev_text_id_idx', '(rev_text_id)' ],
 251                         [ 'addPgIndex', 'recentchanges', 'rc_timestamp_bot', '(rc_timestamp) WHERE rc_bot = 0' ],
 252                         [ 'addPgIndex', 'templatelinks', 'templatelinks_from', '(tl_from)' ],
 253                         [ 'addPgIndex', 'watchlist', 'wl_user', '(wl_user)' ],
 254                         [ 'addPgIndex', 'watchlist', 'wl_user_notificationtimestamp',
 255                                 '(wl_user, wl_notificationtimestamp)' ],
 256                         [ 'addPgIndex', 'logging', 'logging_user_type_time',
 257                                 '(log_user, log_type, log_timestamp)' ],
 258                         [ 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ],
 259                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ],
 260                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ],
 261                         [ 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ],
 262                         [ 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ],
 263                         [ 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ],
 264                         [ 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ],
 265                         [ 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ],
 266                         [ 'addPgIndex', 'logging', 'logging_user_text_type_time',
 267                                 '(log_user_text, log_type, log_timestamp)' ],
 268                         [ 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ],
 269
 270                         [ 'checkIndex', 'pagelink_unique', [
 271                                 [ 'pl_from', 'int4_ops', 'btree', 0 ],
 272                                 [ 'pl_namespace', 'int2_ops', 'btree', 0 ],
 273                                 [ 'pl_title', 'text_ops', 'btree', 0 ],
 274                         ],
 275                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ],
 276                         [ 'checkIndex', 'cl_sortkey', [
 277                                 [ 'cl_to', 'text_ops', 'btree', 0 ],
 278                                 [ 'cl_sortkey', 'text_ops', 'btree', 0 ],
 279                                 [ 'cl_from', 'int4_ops', 'btree', 0 ],
 280                         ],
 281                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 282                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ],
 283                         [ 'checkIndex', 'iwl_prefix_title_from', [
 284                                 [ 'iwl_prefix', 'text_ops', 'btree', 0 ],
 285                                 [ 'iwl_title', 'text_ops', 'btree', 0 ],
 286                                 [ 'iwl_from', 'int4_ops', 'btree', 0 ],
 287                         ],
 288                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 289                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ],
 290                         [ 'checkIndex', 'logging_times', [
 291                                 [ 'log_timestamp', 'timestamptz_ops', 'btree', 0 ],
 292                         ],
 293                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ],
 294                         [ 'dropPgIndex', 'oldimage', 'oi_name' ],
 295                         [ 'checkIndex', 'oi_name_archive_name', [
 296                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 297                                 [ 'oi_archive_name', 'text_ops', 'btree', 0 ],
 298                         ],
 299                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 300                                 'USING "btree" ("oi_name", "oi_archive_name")' ],
 301                         [ 'checkIndex', 'oi_name_timestamp', [
 302                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 303                                 [ 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ],
 304                         ],
 305                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 306                                 'USING "btree" ("oi_name", "oi_timestamp")' ],
 307                         [ 'checkIndex', 'page_main_title', [
 308                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 309                         ],
 310                         'CREATE INDEX "page_main_title" ON "page" ' .
 311                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ],
 312                         [ 'checkIndex', 'page_mediawiki_title', [
 313                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 314                         ],
 315                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 316                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ],
 317                         [ 'checkIndex', 'page_project_title', [
 318                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 319                         ],
 320                         'CREATE INDEX "page_project_title" ON "page" ' .
 321                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 322                                 'WHERE ("page_namespace" = 4)' ],
 323                         [ 'checkIndex', 'page_talk_title', [
 324                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 325                         ],
 326                         'CREATE INDEX "page_talk_title" ON "page" ' .
 327                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 328                                 'WHERE ("page_namespace" = 1)' ],
 329                         [ 'checkIndex', 'page_user_title', [
 330                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 331                         ],
 332                         'CREATE INDEX "page_user_title" ON "page" ' .
 333                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 334                                 '("page_namespace" = 2)' ],
 335                         [ 'checkIndex', 'page_utalk_title', [
 336                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 337                         ],
 338                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 339                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 340                                 'WHERE ("page_namespace" = 3)' ],
 341                         [ 'checkIndex', 'ts2_page_text', [
 342                                 [ 'textvector', 'tsvector_ops', 'gist', 0 ],
 343                         ],
 344                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ],
 345                         [ 'checkIndex', 'ts2_page_title', [
 346                                 [ 'titlevector', 'tsvector_ops', 'gist', 0 ],
 347                         ],
 348                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ],
 349
 350                         [ 'checkOiNameConstraint' ],
 351                         [ 'checkPageDeletedTrigger' ],
 352                         [ 'checkRevUserFkey' ],
 353                         [ 'dropPgIndex', 'ipblocks', 'ipb_address' ],
 354                         [ 'checkIndex', 'ipb_address_unique', [
 355                                 [ 'ipb_address', 'text_ops', 'btree', 0 ],
 356                                 [ 'ipb_user', 'int4_ops', 'btree', 0 ],
 357                                 [ 'ipb_auto', 'int2_ops', 'btree', 0 ],
 358                                 [ 'ipb_anon_only', 'int2_ops', 'btree', 0 ],
 359                         ],
 360                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 361                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ],
 362
 363                         [ 'checkIwlPrefix' ],
 364
 365                         # All FK columns should be deferred
 366                         [ 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 367                         [ 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ],
 368                         [ 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ],
 369                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 370                                 'mwuser(user_id) ON DELETE SET NULL' ],
 371                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 372                         [ 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 373                         [ 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ],
 374                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ],
 375                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 376                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 377                                 'ipblocks(ipb_id) ON DELETE SET NULL' ],
 378                         [ 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ],
 379                         [ 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 380                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 381                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ],
 382                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 383                         [ 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ],
 384                         [ 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ],
 385                         [ 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 386                                 'page(page_id) ON DELETE CASCADE' ],
 387                         [ 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 388                                 'mwuser(user_id) ON DELETE SET NULL' ],
 389                         [ 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 390                                 'mwuser(user_id) ON DELETE SET NULL' ],
 391                         [ 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ],
 392                         [ 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ],
 393                         [ 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ],
 394                         [ 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ],
 395                         [ 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 396                         [ 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ],
 397                         [ 'changeFkeyDeferrable', 'user_properties', 'up_user',
 398                                 'mwuser(user_id) ON DELETE CASCADE' ],
 399                         [ 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 400
 401                         # r81574
 402                         [ 'addInterwikiType' ],
 403                         # end
 404                         [ 'tsearchFixes' ],
 405
 406                         // 1.23
 407                         [ 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ],
 408                         [ 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ],
 409                         [ 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ],
 410                         [ 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 411                                 "replace(lc_value,'\','\\\\')::bytea" ],
 412                         // 1.23.9
 413                         [ 'rebuildTextSearch' ],
 414
 415                         // 1.24
 416                         [ 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ],
 417                         [ 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 418                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ],
 419                         [ 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ],
 420                         [ 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 421                         [ 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 422                         [ 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 423
 424                         // 1.25
 425                         [ 'dropTable', 'hitcounter' ],
 426                         [ 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ],
 427                         [ 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ],
 428                         [ 'dropFkey', 'recentchanges', 'rc_cur_id' ],
 429
 430                         // 1.27
 431                         [ 'dropTable', 'msg_resource_links' ],
 432                         [ 'dropTable', 'msg_resource' ],
 433                         [
 434                                 'addPgField', 'watchlist', 'wl_id',
 435                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('watchlist_wl_id_seq')"
 436                         ],
 437
 438                         // 1.28
 439                         [ 'addPgIndex', 'recentchanges', 'rc_name_type_patrolled_timestamp',
 440                                 '( rc_namespace, rc_type, rc_patrolled, rc_timestamp )' ],
 441                         [ 'addPgField', 'change_tag', 'ct_id',
 442                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('change_tag_ct_id_seq')" ],
 443
 444                         // 1.29
 445                         [ 'addPgField', 'externallinks', 'el_index_60', "BYTEA NOT NULL DEFAULT ''" ],
 446                         [ 'addPgIndex', 'externallinks', 'el_index_60', '( el_index_60, el_id )' ],
 447                         [ 'addPgIndex', 'externallinks', 'el_from_index_60', '( el_from, el_index_60, el_id )' ],
 448                         [ 'addPgField', 'user_groups', 'ug_expiry', "TIMESTAMPTZ NULL" ],
 449                         [ 'addPgIndex', 'user_groups', 'user_groups_expiry', '( ug_expiry )' ],
 450
 451                         // 1.30
 452                         [ 'addPgEnumValue', 'media_type', '3D' ],
 453                         [ 'setDefault', 'revision', 'rev_comment', '' ],
 454                         [ 'changeNullableField', 'revision', 'rev_comment', 'NOT NULL', true ],
 455                         [ 'setDefault', 'archive', 'ar_comment', '' ],
 456                         [ 'changeNullableField', 'archive', 'ar_comment', 'NOT NULL', true ],
 457                         [ 'addPgField', 'archive', 'ar_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 458                         [ 'setDefault', 'ipblocks', 'ipb_reason', '' ],
 459                         [ 'addPgField', 'ipblocks', 'ipb_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 460                         [ 'setDefault', 'image', 'img_description', '' ],
 461                         [ 'setDefault', 'oldimage', 'oi_description', '' ],
 462                         [ 'changeNullableField', 'oldimage', 'oi_description', 'NOT NULL', true ],
 463                         [ 'addPgField', 'oldimage', 'oi_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 464                         [ 'setDefault', 'filearchive', 'fa_deleted_reason', '' ],
 465                         [ 'changeNullableField', 'filearchive', 'fa_deleted_reason', 'NOT NULL', true ],
 466                         [ 'addPgField', 'filearchive', 'fa_deleted_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 467                         [ 'setDefault', 'filearchive', 'fa_description', '' ],
 468                         [ 'addPgField', 'filearchive', 'fa_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 469                         [ 'setDefault', 'recentchanges', 'rc_comment', '' ],
 470                         [ 'changeNullableField', 'recentchanges', 'rc_comment', 'NOT NULL', true ],
 471                         [ 'addPgField', 'recentchanges', 'rc_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 472                         [ 'setDefault', 'logging', 'log_comment', '' ],
 473                         [ 'changeNullableField', 'logging', 'log_comment', 'NOT NULL', true ],
 474                         [ 'addPgField', 'logging', 'log_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 475                         [ 'setDefault', 'protected_titles', 'pt_reason', '' ],
 476                         [ 'changeNullableField', 'protected_titles', 'pt_reason', 'NOT NULL', true ],
 477                         [ 'addPgField', 'protected_titles', 'pt_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 478                         [ 'addTable', 'comment', 'patch-comment-table.sql' ],
 479
 480                         // This field was added in 1.31, but is put here so it can be used by 'migrateComments'
 481                         [ 'addPgField', 'image', 'img_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 482
 483                         [ 'migrateComments' ],
 484                         [ 'addIndex', 'site_stats', 'site_stats_pkey', 'patch-site_stats-pk.sql' ],
 485                         [ 'addTable', 'ip_changes', 'patch-ip_changes.sql' ],
 486
 487                         // 1.31
 488                         [ 'addTable', 'slots', 'patch-slots-table.sql' ],
 489                         [ 'dropPgIndex', 'slots', 'slot_role_inherited' ],
 490                         [ 'dropPgField', 'slots', 'slot_inherited' ],
 491                         [ 'addPgField', 'slots', 'slot_origin', 'INTEGER NOT NULL' ],
 492                         [
 493                                 'addPgIndex',
 494                                 'slots',
 495                                 'slot_revision_origin_role',
 496                                 '( slot_revision_id, slot_origin, slot_role_id )',
 497                         ],
 498                         [ 'addTable', 'content', 'patch-content-table.sql' ],
 499                         [ 'addTable', 'content_models', 'patch-content_models-table.sql' ],
 500                         [ 'addTable', 'slot_roles', 'patch-slot_roles-table.sql' ],
 501                         [ 'migrateArchiveText' ],
 502                         [ 'addTable', 'actor', 'patch-actor-table.sql' ],
 503                         [ 'setDefault', 'revision', 'rev_user', 0 ],
 504                         [ 'setDefault', 'revision', 'rev_user_text', '' ],
 505                         [ 'setDefault', 'archive', 'ar_user', 0 ],
 506                         [ 'changeNullableField', 'archive', 'ar_user', 'NOT NULL', true ],
 507                         [ 'setDefault', 'archive', 'ar_user_text', '' ],
 508                         [ 'addPgField', 'archive', 'ar_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 509                         [ 'addPgIndex', 'archive', 'archive_actor', '( ar_actor )' ],
 510                         [ 'setDefault', 'ipblocks', 'ipb_by', 0 ],
 511                         [ 'addPgField', 'ipblocks', 'ipb_by_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 512                         [ 'setDefault', 'image', 'img_user', 0 ],
 513                         [ 'changeNullableField', 'image', 'img_user', 'NOT NULL', true ],
 514                         [ 'setDefault', 'image', 'img_user_text', '' ],
 515                         [ 'addPgField', 'image', 'img_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 516                         [ 'setDefault', 'oldimage', 'oi_user', 0 ],
 517                         [ 'changeNullableField', 'oldimage', 'oi_user', 'NOT NULL', true ],
 518                         [ 'setDefault', 'oldimage', 'oi_user_text', '' ],
 519                         [ 'addPgField', 'oldimage', 'oi_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 520                         [ 'setDefault', 'filearchive', 'fa_user', 0 ],
 521                         [ 'changeNullableField', 'filearchive', 'fa_user', 'NOT NULL', true ],
 522                         [ 'setDefault', 'filearchive', 'fa_user_text', '' ],
 523                         [ 'addPgField', 'filearchive', 'fa_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 524                         [ 'setDefault', 'recentchanges', 'rc_user', 0 ],
 525                         [ 'changeNullableField', 'recentchanges', 'rc_user', 'NOT NULL', true ],
 526                         [ 'setDefault', 'recentchanges', 'rc_user_text', '' ],
 527                         [ 'addPgField', 'recentchanges', 'rc_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 528                         [ 'setDefault', 'logging', 'log_user', 0 ],
 529                         [ 'changeNullableField', 'logging', 'log_user', 'NOT NULL', true ],
 530                         [ 'addPgField', 'logging', 'log_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 531                         [ 'addPgIndex', 'logging', 'logging_actor_time_backwards', '( log_timestamp, log_actor )' ],
 532                         [ 'addPgIndex', 'logging', 'logging_actor_type_time', '( log_actor, log_type, log_timestamp )' ],
 533                         [ 'addPgIndex', 'logging', 'logging_actor_time', '( log_actor, log_timestamp )' ],
 534                         [ 'migrateActors' ],
 535                         [ 'modifyTable', 'site_stats', 'patch-site_stats-modify.sql' ],
 536                         [ 'populateArchiveRevId' ],
 537                         [ 'dropPgIndex', 'recentchanges', 'rc_namespace_title' ],
 538                         [
 539                                 'addPgIndex',
 540                                 'recentchanges',
 541                                 'rc_namespace_title_timestamp', '( rc_namespace, rc_title, rc_timestamp )'
 542                         ],
 543                         [ 'setSequenceOwner', 'mwuser', 'user_id', 'user_user_id_seq' ],
 544                         [ 'setSequenceOwner', 'actor', 'actor_id', 'actor_actor_id_seq' ],
 545                         [ 'setSequenceOwner', 'page', 'page_id', 'page_page_id_seq' ],
 546                         [ 'setSequenceOwner', 'revision', 'rev_id', 'revision_rev_id_seq' ],
 547                         [ 'setSequenceOwner', 'ip_changes', 'ipc_rev_id', 'ip_changes_ipc_rev_id_seq' ],
 548                         [ 'setSequenceOwner', 'pagecontent', 'old_id', 'text_old_id_seq' ],
 549                         [ 'setSequenceOwner', 'comment', 'comment_id', 'comment_comment_id_seq' ],
 550                         [ 'setSequenceOwner', 'page_restrictions', 'pr_id', 'page_restrictions_pr_id_seq' ],
 551                         [ 'setSequenceOwner', 'archive', 'ar_id', 'archive_ar_id_seq' ],
 552                         [ 'setSequenceOwner', 'content', 'content_id', 'content_content_id_seq' ],
 553                         [ 'setSequenceOwner', 'slot_roles', 'role_id', 'slot_roles_role_id_seq' ],
 554                         [ 'setSequenceOwner', 'content_models', 'model_id', 'content_models_model_id_seq' ],
 555                         [ 'setSequenceOwner', 'externallinks', 'el_id', 'externallinks_el_id_seq' ],
 556                         [ 'setSequenceOwner', 'ipblocks', 'ipb_id', 'ipblocks_ipb_id_seq' ],
 557                         [ 'setSequenceOwner', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ],
 558                         [ 'setSequenceOwner', 'uploadstash', 'us_id', 'uploadstash_us_id_seq' ],
 559                         [ 'setSequenceOwner', 'recentchanges', 'rc_id', 'recentchanges_rc_id_seq' ],
 560                         [ 'setSequenceOwner', 'watchlist', 'wl_id', 'watchlist_wl_id_seq' ],
 561                         [ 'setSequenceOwner', 'logging', 'log_id', 'logging_log_id_seq' ],
 562                         [ 'setSequenceOwner', 'job', 'job_id', 'job_job_id_seq' ],
 563                         [ 'setSequenceOwner', 'category', 'cat_id', 'category_cat_id_seq' ],
 564                         [ 'setSequenceOwner', 'change_tag', 'ct_id', 'change_tag_ct_id_seq' ],
 565                         [ 'setSequenceOwner', 'sites', 'site_id', 'sites_site_id_seq' ],
 566
 567                         // 1.32
 568                         [ 'addTable', 'change_tag_def', 'patch-change_tag_def.sql' ],
 569                         [ 'populateExternallinksIndex60' ],
 570                         [ 'dropDefault', 'externallinks', 'el_index_60' ],
 571                         [ 'runMaintenance', DeduplicateArchiveRevId::class, 'maintenance/deduplicateArchiveRevId.php' ],
 572                         [ 'addPgField', 'change_tag', 'ct_tag_id', 'INTEGER NULL' ],
 573                         [
 574                                 'addPgIndex',
 575                                 'change_tag',
 576                                 'change_tag_tag_id_id',
 577                                 '( ct_tag_id, ct_rc_id, ct_rev_id, ct_log_id )'
 578                         ],
 579                         [ 'addPgIndex', 'archive', 'ar_revid_uniq', '(ar_rev_id)', 'unique' ],
 580                         [ 'dropPgIndex', 'archive', 'ar_revid' ], // Probably doesn't exist, but do it anyway.
 581                         [ 'populateContentTables' ],
 582                         [ 'addPgIndex', 'logging', 'log_type_action', '( log_type, log_action, log_timestamp )' ],
 583                         [ 'dropPgIndex', 'page_props', 'page_props_propname' ],
 584                         [ 'addIndex', 'interwiki', 'interwiki_pkey', 'patch-interwiki-pk.sql' ],
 585                         [ 'addIndex', 'protected_titles', 'protected_titles_pkey', 'patch-protected_titles-pk.sql' ],
 586                         [ 'addIndex', 'site_identifiers', 'site_identifiers_pkey', 'patch-site_identifiers-pk.sql' ],
 587                         [ 'addPgIndex', 'recentchanges', 'rc_this_oldid', '(rc_this_oldid)' ],
 588                         [ 'dropTable', 'transcache' ],
 589                         [ 'runMaintenance', PopulateChangeTagDef::class, 'maintenance/populateChangeTagDef.php' ],
 590                         [ 'addIndex', 'change_tag', 'change_tag_rc_tag_id',
 591                                 'patch-change_tag-change_tag_rc_tag_id.sql' ],
 592                         [ 'addPgField', 'ipblocks', 'ipb_sitewide', 'SMALLINT NOT NULL DEFAULT 1' ],
 593                         [ 'addTable', 'ipblocks_restrictions', 'patch-ipblocks_restrictions-table.sql' ],
 594                         [ 'migrateImageCommentTemp' ],
 595                         [ 'dropPgField', 'category', 'cat_hidden' ],
 596                         [ 'dropPgField', 'site_stats', 'ss_admins' ],
 597                         [ 'dropPgField', 'recentchanges', 'rc_cur_time' ],
 598
 599                         // 1.33
 600                         [ 'dropField', 'change_tag', 'ct_tag', 'patch-drop-ct_tag.sql' ],
 601                         [ 'dropTable', 'valid_tag' ],
 602                         [ 'dropTable', 'tag_summary' ],
 603                         [ 'dropPgField', 'archive', 'ar_comment' ],
 604                         [ 'dropDefault', 'archive', 'ar_comment_id' ],
 605                         [ 'dropPgField', 'ipblocks', 'ipb_reason' ],
 606                         [ 'dropDefault', 'ipblocks', 'ipb_reason_id' ],
 607                         [ 'dropPgField', 'image', 'img_description' ],
 608                         [ 'dropDefault', 'image', 'img_description_id' ],
 609                         [ 'dropPgField', 'oldimage', 'oi_description' ],
 610                         [ 'dropDefault', 'oldimage', 'oi_description_id' ],
 611                         [ 'dropPgField', 'filearchive', 'fa_deleted_reason' ],
 612                         [ 'dropDefault', 'filearchive', 'fa_deleted_reason_id' ],
 613                         [ 'dropPgField', 'filearchive', 'fa_description' ],
 614                         [ 'dropDefault', 'filearchive', 'fa_description_id' ],
 615                         [ 'dropPgField', 'recentchanges', 'rc_comment' ],
 616                         [ 'dropDefault', 'recentchanges', 'rc_comment_id' ],
 617                         [ 'dropPgField', 'logging', 'log_comment' ],
 618                         [ 'dropDefault', 'logging', 'log_comment_id' ],
 619                         [ 'dropPgField', 'protected_titles', 'pt_reason' ],
 620                         [ 'dropDefault', 'protected_titles', 'pt_reason_id' ],
 621                 ];
 622         }
 623
 624         protected function getOldGlobalUpdates() {
 625                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 626
 627                 $updates = [];
 628
 629                 # Add missing extension tables
 630                 foreach ( $wgExtNewTables as $tableRecord ) {
 631                         $updates[] = [
 632                                 'addTable', $tableRecord[0], $tableRecord[1], true
 633                         ];
 634                 }
 635
 636                 # Add missing extension fields
 637                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 638                         $updates[] = [
 639                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 640                                 $fieldRecord[2]
 641                         ];
 642                 }
 643
 644                 # Change altered columns
 645                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 646                         $updates[] = [
 647                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 648                                 $fieldRecord[2]
 649                         ];
 650                 }
 651
 652                 # Add missing extension indexes
 653                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 654                         $updates[] = [
 655                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 656                                 $fieldRecord[2]
 657                         ];
 658                 }
 659
 660                 return $updates;
 661         }
 662
 663         protected function describeTable( $table ) {
 664                 $q = <<<END
 665 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 666         WHERE pg_class.relnamespace = pg_namespace.oid
 667                 AND attrelid=pg_class.oid AND attnum > 0
 668                 AND relname=%s AND nspname=%s
 669 END;
 670                 $res = $this->db->query( sprintf( $q,
 671                         $this->db->addQuotes( $table ),
 672                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 673                 if ( !$res ) {
 674                         return null;
 675                 }
 676
 677                 $cols = [];
 678                 foreach ( $res as $r ) {
 679                         $cols[] = [
 680                                 "name" => $r[0],
 681                                 "ord" => $r[1],
 682                         ];
 683                 }
 684
 685                 return $cols;
 686         }
 687
 688         function describeIndex( $idx ) {
 689                 // first fetch the key (which is a list of columns ords) and
 690                 // the table the index applies to (an oid)
 691                 $q = <<<END
 692 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 693         WHERE nspname=%s
 694                 AND pg_class.relnamespace = pg_namespace.oid
 695                 AND relname=%s
 696                 AND indexrelid=pg_class.oid
 697 END;
 698                 $res = $this->db->query(
 699                         sprintf(
 700                                 $q,
 701                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 702                                 $this->db->addQuotes( $idx )
 703                         )
 704                 );
 705                 if ( !$res ) {
 706                         return null;
 707                 }
 708                 $r = $this->db->fetchRow( $res );
 709                 if ( !$r ) {
 710                         return null;
 711                 }
 712
 713                 $indkey = $r[0];
 714                 $relid = intval( $r[1] );
 715                 $indkeys = explode( ' ', $indkey );
 716
 717                 $colnames = [];
 718                 foreach ( $indkeys as $rid ) {
 719                         $query = <<<END
 720 SELECT attname FROM pg_class, pg_attribute
 721         WHERE attrelid=$relid
 722                 AND attnum=%d
 723                 AND attrelid=pg_class.oid
 724 END;
 725                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 726                         if ( !$r2 ) {
 727                                 return null;
 728                         }
 729                         $row2 = $this->db->fetchRow( $r2 );
 730                         if ( !$row2 ) {
 731                                 return null;
 732                         }
 733                         $colnames[] = $row2[0];
 734                 }
 735
 736                 return $colnames;
 737         }
 738
 739         function fkeyDeltype( $fkey ) {
 740                 $q = <<<END
 741 SELECT confdeltype FROM pg_constraint, pg_namespace
 742         WHERE connamespace=pg_namespace.oid
 743                 AND nspname=%s
 744                 AND conname=%s;
 745 END;
 746                 $r = $this->db->query(
 747                         sprintf(
 748                                 $q,
 749                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 750                                 $this->db->addQuotes( $fkey )
 751                         )
 752                 );
 753                 $row = $this->db->fetchRow( $r );
 754                 if ( !$row ) {
 755                         return null;
 756                 }
 757
 758                 return $row[0];
 759         }
 760
 761         function ruleDef( $table, $rule ) {
 762                 $q = <<<END
 763 SELECT definition FROM pg_rules
 764         WHERE schemaname = %s
 765                 AND tablename = %s
 766                 AND rulename = %s
 767 END;
 768                 $r = $this->db->query(
 769                         sprintf(
 770                                 $q,
 771                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 772                                 $this->db->addQuotes( $table ),
 773                                 $this->db->addQuotes( $rule )
 774                         )
 775                 );
 776                 $row = $this->db->fetchRow( $r );
 777                 if ( !$row ) {
 778                         return null;
 779                 }
 780                 $d = $row[0];
 781
 782                 return $d;
 783         }
 784
 785         protected function addSequence( $table, $pkey, $ns ) {
 786                 if ( !$this->db->sequenceExists( $ns ) ) {
 787                         $this->output( "Creating sequence $ns\n" );
 788                         if ( $pkey !== false ) {
 789                                 $this->db->query( "CREATE SEQUENCE $ns OWNED BY $table.$pkey" );
 790                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 791                         } else {
 792                                 $this->db->query( "CREATE SEQUENCE $ns" );
 793                         }
 794                 }
 795         }
 796
 797         protected function dropSequence( $table, $ns ) {
 798                 if ( $this->db->sequenceExists( $ns ) ) {
 799                         $this->output( "Dropping sequence $ns\n" );
 800                         $this->db->query( "DROP SEQUENCE $ns CASCADE" );
 801                 }
 802         }
 803
 804         protected function renameSequence( $old, $new ) {
 805                 if ( $this->db->sequenceExists( $new ) ) {
 806                         $this->output( "...sequence $new already exists.\n" );
 807
 808                         return;
 809                 }
 810                 if ( $this->db->sequenceExists( $old ) ) {
 811                         $this->output( "Renaming sequence $old to $new\n" );
 812                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 813                 }
 814         }
 815
 816         protected function setSequenceOwner( $table, $pkey, $seq ) {
 817                 if ( $this->db->sequenceExists( $seq ) ) {
 818                         $this->output( "Setting sequence $seq owner to $table.$pkey\n" );
 819                         $this->db->query( "ALTER SEQUENCE $seq OWNED BY $table.$pkey" );
 820                 }
 821         }
 822
 823         protected function renameTable( $old, $new, $patch = false ) {
 824                 if ( $this->db->tableExists( $old ) ) {
 825                         $this->output( "Renaming table $old to $new\n" );
 826                         $old = $this->db->realTableName( $old, "quoted" );
 827                         $new = $this->db->realTableName( $new, "quoted" );
 828                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 829                         if ( $patch !== false ) {
 830                                 $this->applyPatch( $patch );
 831                         }
 832                 }
 833         }
 834
 835         protected function renameIndex(
 836                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 837         ) {
 838                 // First requirement: the table must exist
 839                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 840                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 841
 842                         return true;
 843                 }
 844
 845                 // Second requirement: the new index must be missing
 846                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 847                         $this->output( "...index $new already set on $table table.\n" );
 848                         if ( !$skipBothIndexExistWarning
 849                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 850                         ) {
 851                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 852                                         "renamed into $new (which also exists).\n" .
 853                                         "            $old should be manually removed if not needed anymore.\n" );
 854                         }
 855
 856                         return true;
 857                 }
 858
 859                 // Third requirement: the old index must exist
 860                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 861                         $this->output( "...skipping: index $old doesn't exist.\n" );
 862
 863                         return true;
 864                 }
 865
 866                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 867                 return true;
 868         }
 869
 870         protected function dropPgField( $table, $field ) {
 871                 $fi = $this->db->fieldInfo( $table, $field );
 872                 if ( is_null( $fi ) ) {
 873                         $this->output( "...$table table does not contain $field field.\n" );
 874
 875                         return;
 876                 } else {
 877                         $this->output( "Dropping column '$table.$field'\n" );
 878                         $this->db->query( "ALTER TABLE $table DROP COLUMN $field" );
 879                 }
 880         }
 881
 882         protected function addPgField( $table, $field, $type ) {
 883                 $fi = $this->db->fieldInfo( $table, $field );
 884                 if ( !is_null( $fi ) ) {
 885                         $this->output( "...column '$table.$field' already exists\n" );
 886
 887                         return;
 888                 } else {
 889                         $this->output( "Adding column '$table.$field'\n" );
 890                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 891                 }
 892         }
 893
 894         protected function changeField( $table, $field, $newtype, $default ) {
 895                 $fi = $this->db->fieldInfo( $table, $field );
 896                 if ( is_null( $fi ) ) {
 897                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 898                         exit( 1 );
 899                 }
 900
 901                 if ( $fi->type() === $newtype ) {
 902                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 903                 } else {
 904                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 905                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 906                         if ( strlen( $default ) ) {
 907                                 $res = [];
 908                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 909                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 910                                         $this->db->query( $sqldef );
 911                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 912                                 }
 913                                 $sql .= " USING $default";
 914                         }
 915                         $this->db->query( $sql );
 916                 }
 917         }
 918
 919         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 920                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 921                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 922                 $fi = $this->db->fieldInfo( $table, $field );
 923                 if ( is_null( $fi ) ) {
 924                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 925                         exit( 1 );
 926                 }
 927
 928                 if ( $fi->type() === $newtype ) {
 929                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 930                 } else {
 931                         $this->output( "Purging data from cache table '$table'\n" );
 932                         $this->db->query( "DELETE from $table" );
 933                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 934                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 935                         if ( strlen( $default ) ) {
 936                                 $res = [];
 937                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 938                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 939                                         $this->db->query( $sqldef );
 940                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 941                                 }
 942                                 $sql .= " USING $default";
 943                         }
 944                         $this->db->query( $sql );
 945                 }
 946         }
 947
 948         protected function setDefault( $table, $field, $default ) {
 949                 $info = $this->db->fieldInfo( $table, $field );
 950                 if ( $info && $info->defaultValue() !== $default ) {
 951                         $this->output( "Changing '$table.$field' default value\n" );
 952                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT "
 953                                 . $this->db->addQuotes( $default ) );
 954                 }
 955         }
 956
 957         /**
 958          * Drop a default value from a field
 959          * @since 1.32
 960          * @param string $table
 961          * @param string $field
 962          */
 963         protected function dropDefault( $table, $field ) {
 964                 $info = $this->db->fieldInfo( $table, $field );
 965                 if ( $info->defaultValue() !== false ) {
 966                         $this->output( "Removing '$table.$field' default value\n" );
 967                         $this->db->query( "ALTER TABLE $table ALTER $field DROP DEFAULT" );
 968                 }
 969         }
 970
 971         protected function changeNullableField( $table, $field, $null, $update = false ) {
 972                 $fi = $this->db->fieldInfo( $table, $field );
 973                 if ( is_null( $fi ) ) {
 974                         return;
 975                 }
 976                 if ( $fi->isNullable() ) {
 977                         # # It's NULL - does it need to be NOT NULL?
 978                         if ( $null === 'NOT NULL' ) {
 979                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 980                                 if ( $update ) {
 981                                         $this->db->query( "UPDATE $table SET $field = DEFAULT WHERE $field IS NULL" );
 982                                 }
 983                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 984                         } else {
 985                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 986                         }
 987                 } else {
 988                         # # It's NOT NULL - does it need to be NULL?
 989                         if ( $null === 'NULL' ) {
 990                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 991                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 992                         } else {
 993                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 994                         }
 995                 }
 996         }
 997
 998         public function addPgIndex( $table, $index, $type, $unique = false ) {
 999                 if ( $this->db->indexExists( $table, $index ) ) {
1000                         $this->output( "...index '$index' on table '$table' already exists\n" );
1001                 } else {
1002                         $this->output( "Creating index '$index' on table '$table' $type\n" );
1003                         $unique = $unique ? 'UNIQUE' : '';
1004                         $this->db->query( "CREATE $unique INDEX $index ON $table $type" );
1005                 }
1006         }
1007
1008         public function addPgExtIndex( $table, $index, $type ) {
1009                 if ( $this->db->indexExists( $table, $index ) ) {
1010                         $this->output( "...index '$index' on table '$table' already exists\n" );
1011                 } elseif ( preg_match( '/^\(/', $type ) ) {
1012                         $this->output( "Creating index '$index' on table '$table'\n" );
1013                         $this->db->query( "CREATE INDEX $index ON $table $type" );
1014                 } else {
1015                         $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
1016                 }
1017         }
1018
1019         /**
1020          * Add a value to an existing PostgreSQL enum type
1021          * @since 1.31
1022          * @param string $type Type name. Must be in the core schema.
1023          * @param string $value Value to add.
1024          */
1025         public function addPgEnumValue( $type, $value ) {
1026                 $row = $this->db->selectRow(
1027                         [
1028                                 't' => 'pg_catalog.pg_type',
1029                                 'n' => 'pg_catalog.pg_namespace',
1030                                 'e' => 'pg_catalog.pg_enum',
1031                         ],
1032                         [ 't.typname', 't.typtype', 'e.enumlabel' ],
1033                         [
1034                                 't.typname' => $type,
1035                                 'n.nspname' => $this->db->getCoreSchema(),
1036                         ],
1037                         __METHOD__,
1038                         [],
1039                         [
1040                                 'n' => [ 'JOIN', 't.typnamespace = n.oid' ],
1041                                 'e' => [ 'LEFT JOIN', [ 'e.enumtypid = t.oid', 'e.enumlabel' => $value ] ],
1042                         ]
1043                 );
1044
1045                 if ( !$row ) {
1046                         $this->output( "...Type $type does not exist, skipping modify enum.\n" );
1047                 } elseif ( $row->typtype !== 'e' ) {
1048                         $this->output( "...Type $type does not seem to be an enum, skipping modify enum.\n" );
1049                 } elseif ( $row->enumlabel === $value ) {
1050                         $this->output( "...Enum type $type already contains value '$value'.\n" );
1051                 } else {
1052                         $this->output( "...Adding value '$value' to enum type $type.\n" );
1053                         $etype = $this->db->addIdentifierQuotes( $type );
1054                         $evalue = $this->db->addQuotes( $value );
1055                         $this->db->query( "ALTER TYPE $etype ADD VALUE $evalue" );
1056                 }
1057         }
1058
1059         protected function dropFkey( $table, $field ) {
1060                 $fi = $this->db->fieldInfo( $table, $field );
1061                 if ( is_null( $fi ) ) {
1062                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
1063                                 "Please report this.\n" );
1064                         return;
1065                 }
1066                 $conname = $fi->conname();
1067                 if ( $fi->conname() ) {
1068                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
1069                         $conclause = "CONSTRAINT \"$conname\"";
1070                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
1071                         $this->db->query( $command );
1072                 } else {
1073                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
1074                 };
1075         }
1076
1077         protected function changeFkeyDeferrable( $table, $field, $clause ) {
1078                 $fi = $this->db->fieldInfo( $table, $field );
1079                 if ( is_null( $fi ) ) {
1080                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
1081                                 "Please report this.\n" );
1082
1083                         return;
1084                 }
1085                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
1086                         return;
1087                 }
1088                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
1089                 $conname = $fi->conname();
1090                 if ( $fi->conname() ) {
1091                         $conclause = "CONSTRAINT \"$conname\"";
1092                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
1093                         $this->db->query( $command );
1094                 } else {
1095                         $this->output( "Column '$table.$field' does not have a foreign key " .
1096                                 "constraint, will be added\n" );
1097                         $conclause = "";
1098                 }
1099                 $command =
1100                         "ALTER TABLE $table ADD $conclause " .
1101                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
1102                 $this->db->query( $command );
1103         }
1104
1105         protected function convertArchive2() {
1106                 if ( $this->db->tableExists( "archive2" ) ) {
1107                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
1108                                 $this->output( "Dropping rule 'archive_insert'\n" );
1109                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
1110                         }
1111                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
1112                                 $this->output( "Dropping rule 'archive_delete'\n" );
1113                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
1114                         }
1115                         $this->applyPatch(
1116                                 'patch-remove-archive2.sql',
1117                                 false,
1118                                 "Converting 'archive2' back to normal archive table"
1119                         );
1120                 } else {
1121                         $this->output( "...obsolete table 'archive2' does not exist\n" );
1122                 }
1123         }
1124
1125         protected function checkOiDeleted() {
1126                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
1127                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
1128                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
1129                         $this->db->query(
1130                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
1131                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
1132                 } else {
1133                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
1134                 }
1135         }
1136
1137         protected function checkOiNameConstraint() {
1138                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
1139                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
1140                                 "foreign key to image\n" );
1141                 } else {
1142                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
1143                                 $this->db->query(
1144                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
1145                         }
1146                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
1147                                 $this->db->query(
1148                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
1149                         }
1150                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
1151                         $this->db->query(
1152                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
1153                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
1154                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
1155                 }
1156         }
1157
1158         protected function checkPageDeletedTrigger() {
1159                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
1160                         $this->applyPatch(
1161                                 'patch-page_deleted.sql',
1162                                 false,
1163                                 "Adding function and trigger 'page_deleted' to table 'page'"
1164                         );
1165                 } else {
1166                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
1167                 }
1168         }
1169
1170         protected function dropPgIndex( $table, $index ) {
1171                 if ( $this->db->indexExists( $table, $index ) ) {
1172                         $this->output( "Dropping obsolete index '$index'\n" );
1173                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
1174                 }
1175         }
1176
1177         protected function checkIndex( $index, $should_be, $good_def ) {
1178                 $pu = $this->db->indexAttributes( $index );
1179                 if ( !empty( $pu ) && $pu != $should_be ) {
1180                         $this->output( "Dropping obsolete version of index '$index'\n" );
1181                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
1182                         $pu = [];
1183                 } else {
1184                         $this->output( "...no need to drop index '$index'\n" );
1185                 }
1186
1187                 if ( empty( $pu ) ) {
1188                         $this->output( "Creating index '$index'\n" );
1189                         $this->db->query( $good_def );
1190                 } else {
1191                         $this->output( "...index '$index' exists\n" );
1192                 }
1193         }
1194
1195         protected function checkRevUserFkey() {
1196                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
1197                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
1198                 } else {
1199                         $this->applyPatch(
1200                                 'patch-revision_rev_user_fkey.sql',
1201                                 false,
1202                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
1203                         );
1204                 }
1205         }
1206
1207         protected function checkIwlPrefix() {
1208                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
1209                         $this->applyPatch(
1210                                 'patch-rename-iwl_prefix.sql',
1211                                 false,
1212                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
1213                         );
1214                 }
1215         }
1216
1217         protected function addInterwikiType() {
1218                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
1219         }
1220
1221         protected function tsearchFixes() {
1222                 # Tweak the page_title tsearch2 trigger to filter out slashes
1223                 # This is create or replace, so harmless to call if not needed
1224                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
1225
1226                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
1227                 # in case they have the old 'default' versions
1228                 # Gather version numbers in case we need them
1229                 if ( $this->db->getServerVersion() >= 8.3 ) {
1230                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
1231                 }
1232         }
1233
1234         protected function rebuildTextSearch() {
1235                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
1236                         $this->output( "...T68650 already fixed or not applicable.\n" );
1237                         return;
1238                 };
1239                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
1240                         'Rebuilding text search for T68650' );
1241         }
1242 }