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                         [ 'ifNoActorTable', '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                         [ 'ifNoActorTable', '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                         [ 'ifNoActorTable', '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                         [ 'ifNoActorTable', '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                         [ 'ifNoActorTable', 'addPgIndex', 'logging', 'logging_user_text_type_time',
 267                                 '(log_user_text, log_type, log_timestamp)' ],
 268                         [ 'ifNoActorTable', 'addPgIndex', 'logging', 'logging_user_text_time',
 269                                 '(log_user_text, log_timestamp)' ],
 270
 271                         [ 'checkIndex', 'pagelink_unique', [
 272                                 [ 'pl_from', 'int4_ops', 'btree', 0 ],
 273                                 [ 'pl_namespace', 'int2_ops', 'btree', 0 ],
 274                                 [ 'pl_title', 'text_ops', 'btree', 0 ],
 275                         ],
 276                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ],
 277                         [ 'checkIndex', 'cl_sortkey', [
 278                                 [ 'cl_to', 'text_ops', 'btree', 0 ],
 279                                 [ 'cl_sortkey', 'text_ops', 'btree', 0 ],
 280                                 [ 'cl_from', 'int4_ops', 'btree', 0 ],
 281                         ],
 282                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 283                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ],
 284                         [ 'checkIndex', 'iwl_prefix_title_from', [
 285                                 [ 'iwl_prefix', 'text_ops', 'btree', 0 ],
 286                                 [ 'iwl_title', 'text_ops', 'btree', 0 ],
 287                                 [ 'iwl_from', 'int4_ops', 'btree', 0 ],
 288                         ],
 289                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 290                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ],
 291                         [ 'checkIndex', 'logging_times', [
 292                                 [ 'log_timestamp', 'timestamptz_ops', 'btree', 0 ],
 293                         ],
 294                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ],
 295                         [ 'dropPgIndex', 'oldimage', 'oi_name' ],
 296                         [ 'checkIndex', 'oi_name_archive_name', [
 297                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 298                                 [ 'oi_archive_name', 'text_ops', 'btree', 0 ],
 299                         ],
 300                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 301                                 'USING "btree" ("oi_name", "oi_archive_name")' ],
 302                         [ 'checkIndex', 'oi_name_timestamp', [
 303                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 304                                 [ 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ],
 305                         ],
 306                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 307                                 'USING "btree" ("oi_name", "oi_timestamp")' ],
 308                         [ 'checkIndex', 'page_main_title', [
 309                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 310                         ],
 311                         'CREATE INDEX "page_main_title" ON "page" ' .
 312                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ],
 313                         [ 'checkIndex', 'page_mediawiki_title', [
 314                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 315                         ],
 316                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 317                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ],
 318                         [ 'checkIndex', 'page_project_title', [
 319                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 320                         ],
 321                         'CREATE INDEX "page_project_title" ON "page" ' .
 322                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 323                                 'WHERE ("page_namespace" = 4)' ],
 324                         [ 'checkIndex', 'page_talk_title', [
 325                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 326                         ],
 327                         'CREATE INDEX "page_talk_title" ON "page" ' .
 328                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 329                                 'WHERE ("page_namespace" = 1)' ],
 330                         [ 'checkIndex', 'page_user_title', [
 331                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 332                         ],
 333                         'CREATE INDEX "page_user_title" ON "page" ' .
 334                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 335                                 '("page_namespace" = 2)' ],
 336                         [ 'checkIndex', 'page_utalk_title', [
 337                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 338                         ],
 339                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 340                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 341                                 'WHERE ("page_namespace" = 3)' ],
 342                         [ 'checkIndex', 'ts2_page_text', [
 343                                 [ 'textvector', 'tsvector_ops', 'gist', 0 ],
 344                         ],
 345                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ],
 346                         [ 'checkIndex', 'ts2_page_title', [
 347                                 [ 'titlevector', 'tsvector_ops', 'gist', 0 ],
 348                         ],
 349                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ],
 350
 351                         [ 'checkOiNameConstraint' ],
 352                         [ 'checkPageDeletedTrigger' ],
 353                         [ 'checkRevUserFkey' ],
 354                         [ 'dropPgIndex', 'ipblocks', 'ipb_address' ],
 355                         [ 'checkIndex', 'ipb_address_unique', [
 356                                 [ 'ipb_address', 'text_ops', 'btree', 0 ],
 357                                 [ 'ipb_user', 'int4_ops', 'btree', 0 ],
 358                                 [ 'ipb_auto', 'int2_ops', 'btree', 0 ],
 359                                 [ 'ipb_anon_only', 'int2_ops', 'btree', 0 ],
 360                         ],
 361                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 362                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ],
 363
 364                         [ 'checkIwlPrefix' ],
 365
 366                         # All FK columns should be deferred
 367                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'archive', 'ar_user',
 368                                 'mwuser(user_id) ON DELETE SET NULL' ],
 369                         [ 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ],
 370                         [ 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ],
 371                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 372                                 'mwuser(user_id) ON DELETE SET NULL' ],
 373                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'filearchive', 'fa_user',
 374                                 'mwuser(user_id) ON DELETE SET NULL' ],
 375                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'image', 'img_user',
 376                                 'mwuser(user_id) ON DELETE SET NULL' ],
 377                         [ 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ],
 378                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'ipblocks', 'ipb_by',
 379                                 'mwuser(user_id) ON DELETE CASCADE' ],
 380                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 381                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 382                                 'ipblocks(ipb_id) ON DELETE SET NULL' ],
 383                         [ 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ],
 384                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'logging', 'log_user',
 385                                 'mwuser(user_id) ON DELETE SET NULL' ],
 386                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 387                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ],
 388                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'oldimage', 'oi_user',
 389                                 'mwuser(user_id) ON DELETE SET NULL' ],
 390                         [ 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ],
 391                         [ 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ],
 392                         [ 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 393                                 'page(page_id) ON DELETE CASCADE' ],
 394                         [ 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 395                                 'mwuser(user_id) ON DELETE SET NULL' ],
 396                         [ 'ifNoActorTable', 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 397                                 'mwuser(user_id) ON DELETE SET NULL' ],
 398                         [ 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ],
 399                         [ 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ],
 400                         [ 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ],
 401                         [ 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ],
 402                         [ 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 403                         [ 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ],
 404                         [ 'changeFkeyDeferrable', 'user_properties', 'up_user',
 405                                 'mwuser(user_id) ON DELETE CASCADE' ],
 406                         [ 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 407
 408                         # r81574
 409                         [ 'addInterwikiType' ],
 410                         # end
 411                         [ 'tsearchFixes' ],
 412
 413                         // 1.23
 414                         [ 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ],
 415                         [ 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ],
 416                         [ 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ],
 417                         [ 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 418                                 "replace(lc_value,'\','\\\\')::bytea" ],
 419                         // 1.23.9
 420                         [ 'rebuildTextSearch' ],
 421
 422                         // 1.24
 423                         [ 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ],
 424                         [ 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 425                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ],
 426                         [ 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ],
 427                         [ 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 428                         [ 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 429                         [ 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 430
 431                         // 1.25
 432                         [ 'dropTable', 'hitcounter' ],
 433                         [ 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ],
 434                         [ 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ],
 435                         [ 'dropFkey', 'recentchanges', 'rc_cur_id' ],
 436
 437                         // 1.27
 438                         [ 'dropTable', 'msg_resource_links' ],
 439                         [ 'dropTable', 'msg_resource' ],
 440                         [
 441                                 'addPgField', 'watchlist', 'wl_id',
 442                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('watchlist_wl_id_seq')"
 443                         ],
 444
 445                         // 1.28
 446                         [ 'addPgIndex', 'recentchanges', 'rc_name_type_patrolled_timestamp',
 447                                 '( rc_namespace, rc_type, rc_patrolled, rc_timestamp )' ],
 448                         [ 'addPgField', 'change_tag', 'ct_id',
 449                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('change_tag_ct_id_seq')" ],
 450
 451                         // 1.29
 452                         [ 'addPgField', 'externallinks', 'el_index_60', "BYTEA NOT NULL DEFAULT ''" ],
 453                         [ 'addPgIndex', 'externallinks', 'el_index_60', '( el_index_60, el_id )' ],
 454                         [ 'addPgIndex', 'externallinks', 'el_from_index_60', '( el_from, el_index_60, el_id )' ],
 455                         [ 'addPgField', 'user_groups', 'ug_expiry', "TIMESTAMPTZ NULL" ],
 456                         [ 'addPgIndex', 'user_groups', 'user_groups_expiry', '( ug_expiry )' ],
 457
 458                         // 1.30
 459                         [ 'addPgEnumValue', 'media_type', '3D' ],
 460                         [ 'setDefault', 'revision', 'rev_comment', '' ],
 461                         [ 'changeNullableField', 'revision', 'rev_comment', 'NOT NULL', true ],
 462                         [ 'setDefault', 'archive', 'ar_comment', '' ],
 463                         [ 'changeNullableField', 'archive', 'ar_comment', 'NOT NULL', true ],
 464                         [ 'addPgField', 'archive', 'ar_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 465                         [ 'setDefault', 'ipblocks', 'ipb_reason', '' ],
 466                         [ 'addPgField', 'ipblocks', 'ipb_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 467                         [ 'setDefault', 'image', 'img_description', '' ],
 468                         [ 'setDefault', 'oldimage', 'oi_description', '' ],
 469                         [ 'changeNullableField', 'oldimage', 'oi_description', 'NOT NULL', true ],
 470                         [ 'addPgField', 'oldimage', 'oi_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 471                         [ 'setDefault', 'filearchive', 'fa_deleted_reason', '' ],
 472                         [ 'changeNullableField', 'filearchive', 'fa_deleted_reason', 'NOT NULL', true ],
 473                         [ 'addPgField', 'filearchive', 'fa_deleted_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 474                         [ 'setDefault', 'filearchive', 'fa_description', '' ],
 475                         [ 'addPgField', 'filearchive', 'fa_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 476                         [ 'setDefault', 'recentchanges', 'rc_comment', '' ],
 477                         [ 'changeNullableField', 'recentchanges', 'rc_comment', 'NOT NULL', true ],
 478                         [ 'addPgField', 'recentchanges', 'rc_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 479                         [ 'setDefault', 'logging', 'log_comment', '' ],
 480                         [ 'changeNullableField', 'logging', 'log_comment', 'NOT NULL', true ],
 481                         [ 'addPgField', 'logging', 'log_comment_id', 'INTEGER NOT NULL DEFAULT 0' ],
 482                         [ 'setDefault', 'protected_titles', 'pt_reason', '' ],
 483                         [ 'changeNullableField', 'protected_titles', 'pt_reason', 'NOT NULL', true ],
 484                         [ 'addPgField', 'protected_titles', 'pt_reason_id', 'INTEGER NOT NULL DEFAULT 0' ],
 485                         [ 'addTable', 'comment', 'patch-comment-table.sql' ],
 486                         [ 'addTable', 'revision_comment_temp', 'patch-revision_comment_temp-table.sql' ],
 487                         // image_comment_temp is no longer needed when upgrading to MW 1.31 or newer,
 488                         // as it is dropped later in the update process as part of 'migrateImageCommentTemp'.
 489                         // File kept on disk and the updater entry here for historical purposes.
 490                         // [ 'addTable', 'image_comment_temp', 'patch-image_comment_temp-table.sql' ],
 491
 492                         // This field was added in 1.31, but is put here so it can be used by 'migrateComments'
 493                         [ 'addPgField', 'image', 'img_description_id', 'INTEGER NOT NULL DEFAULT 0' ],
 494
 495                         [ 'migrateComments' ],
 496                         [ 'addIndex', 'site_stats', 'site_stats_pkey', 'patch-site_stats-pk.sql' ],
 497                         [ 'addTable', 'ip_changes', 'patch-ip_changes.sql' ],
 498
 499                         // 1.31
 500                         [ 'addTable', 'slots', 'patch-slots-table.sql' ],
 501                         [ 'dropPgIndex', 'slots', 'slot_role_inherited' ],
 502                         [ 'dropPgField', 'slots', 'slot_inherited' ],
 503                         [ 'addPgField', 'slots', 'slot_origin', 'INTEGER NOT NULL' ],
 504                         [
 505                                 'addPgIndex',
 506                                 'slots',
 507                                 'slot_revision_origin_role',
 508                                 '( slot_revision_id, slot_origin, slot_role_id )',
 509                         ],
 510                         [ 'addTable', 'content', 'patch-content-table.sql' ],
 511                         [ 'addTable', 'content_models', 'patch-content_models-table.sql' ],
 512                         [ 'addTable', 'slot_roles', 'patch-slot_roles-table.sql' ],
 513                         [ 'migrateArchiveText' ],
 514                         [ 'addTable', 'actor', 'patch-actor-table.sql' ],
 515                         [ 'setDefault', 'revision', 'rev_user', 0 ],
 516                         [ 'setDefault', 'revision', 'rev_user_text', '' ],
 517                         [ 'setDefault', 'archive', 'ar_user', 0 ],
 518                         [ 'changeNullableField', 'archive', 'ar_user', 'NOT NULL', true ],
 519                         [ 'setDefault', 'archive', 'ar_user_text', '' ],
 520                         [ 'addPgField', 'archive', 'ar_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 521                         [ 'addPgIndex', 'archive', 'archive_actor', '( ar_actor )' ],
 522                         [ 'setDefault', 'ipblocks', 'ipb_by', 0 ],
 523                         [ 'addPgField', 'ipblocks', 'ipb_by_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 524                         [ 'setDefault', 'image', 'img_user', 0 ],
 525                         [ 'changeNullableField', 'image', 'img_user', 'NOT NULL', true ],
 526                         [ 'setDefault', 'image', 'img_user_text', '' ],
 527                         [ 'addPgField', 'image', 'img_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 528                         [ 'setDefault', 'oldimage', 'oi_user', 0 ],
 529                         [ 'changeNullableField', 'oldimage', 'oi_user', 'NOT NULL', true ],
 530                         [ 'setDefault', 'oldimage', 'oi_user_text', '' ],
 531                         [ 'addPgField', 'oldimage', 'oi_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 532                         [ 'setDefault', 'filearchive', 'fa_user', 0 ],
 533                         [ 'changeNullableField', 'filearchive', 'fa_user', 'NOT NULL', true ],
 534                         [ 'setDefault', 'filearchive', 'fa_user_text', '' ],
 535                         [ 'addPgField', 'filearchive', 'fa_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 536                         [ 'setDefault', 'recentchanges', 'rc_user', 0 ],
 537                         [ 'changeNullableField', 'recentchanges', 'rc_user', 'NOT NULL', true ],
 538                         [ 'setDefault', 'recentchanges', 'rc_user_text', '' ],
 539                         [ 'addPgField', 'recentchanges', 'rc_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 540                         [ 'setDefault', 'logging', 'log_user', 0 ],
 541                         [ 'changeNullableField', 'logging', 'log_user', 'NOT NULL', true ],
 542                         [ 'addPgField', 'logging', 'log_actor', 'INTEGER NOT NULL DEFAULT 0' ],
 543                         [ 'addPgIndex', 'logging', 'logging_actor_time_backwards', '( log_timestamp, log_actor )' ],
 544                         [ 'addPgIndex', 'logging', 'logging_actor_type_time', '( log_actor, log_type, log_timestamp )' ],
 545                         [ 'addPgIndex', 'logging', 'logging_actor_time', '( log_actor, log_timestamp )' ],
 546                         [ 'migrateActors' ],
 547                         [ 'modifyTable', 'site_stats', 'patch-site_stats-modify.sql' ],
 548                         [ 'populateArchiveRevId' ],
 549                         [ 'dropPgIndex', 'recentchanges', 'rc_namespace_title' ],
 550                         [
 551                                 'addPgIndex',
 552                                 'recentchanges',
 553                                 'rc_namespace_title_timestamp', '( rc_namespace, rc_title, rc_timestamp )'
 554                         ],
 555                         [ 'setSequenceOwner', 'mwuser', 'user_id', 'user_user_id_seq' ],
 556                         [ 'setSequenceOwner', 'actor', 'actor_id', 'actor_actor_id_seq' ],
 557                         [ 'setSequenceOwner', 'page', 'page_id', 'page_page_id_seq' ],
 558                         [ 'setSequenceOwner', 'revision', 'rev_id', 'revision_rev_id_seq' ],
 559                         [ 'setSequenceOwner', 'ip_changes', 'ipc_rev_id', 'ip_changes_ipc_rev_id_seq' ],
 560                         [ 'setSequenceOwner', 'pagecontent', 'old_id', 'text_old_id_seq' ],
 561                         [ 'setSequenceOwner', 'comment', 'comment_id', 'comment_comment_id_seq' ],
 562                         [ 'setSequenceOwner', 'page_restrictions', 'pr_id', 'page_restrictions_pr_id_seq' ],
 563                         [ 'setSequenceOwner', 'archive', 'ar_id', 'archive_ar_id_seq' ],
 564                         [ 'setSequenceOwner', 'content', 'content_id', 'content_content_id_seq' ],
 565                         [ 'setSequenceOwner', 'slot_roles', 'role_id', 'slot_roles_role_id_seq' ],
 566                         [ 'setSequenceOwner', 'content_models', 'model_id', 'content_models_model_id_seq' ],
 567                         [ 'setSequenceOwner', 'externallinks', 'el_id', 'externallinks_el_id_seq' ],
 568                         [ 'setSequenceOwner', 'ipblocks', 'ipb_id', 'ipblocks_ipb_id_seq' ],
 569                         [ 'setSequenceOwner', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ],
 570                         [ 'setSequenceOwner', 'uploadstash', 'us_id', 'uploadstash_us_id_seq' ],
 571                         [ 'setSequenceOwner', 'recentchanges', 'rc_id', 'recentchanges_rc_id_seq' ],
 572                         [ 'setSequenceOwner', 'watchlist', 'wl_id', 'watchlist_wl_id_seq' ],
 573                         [ 'setSequenceOwner', 'logging', 'log_id', 'logging_log_id_seq' ],
 574                         [ 'setSequenceOwner', 'job', 'job_id', 'job_job_id_seq' ],
 575                         [ 'setSequenceOwner', 'category', 'cat_id', 'category_cat_id_seq' ],
 576                         [ 'setSequenceOwner', 'change_tag', 'ct_id', 'change_tag_ct_id_seq' ],
 577                         [ 'setSequenceOwner', 'sites', 'site_id', 'sites_site_id_seq' ],
 578
 579                         // 1.32
 580                         [ 'addTable', 'change_tag_def', 'patch-change_tag_def.sql' ],
 581                         [ 'populateExternallinksIndex60' ],
 582                         [ 'dropDefault', 'externallinks', 'el_index_60' ],
 583                         [ 'runMaintenance', DeduplicateArchiveRevId::class, 'maintenance/deduplicateArchiveRevId.php' ],
 584                         [ 'addPgField', 'change_tag', 'ct_tag_id', 'INTEGER NULL' ],
 585                         [
 586                                 'addPgIndex',
 587                                 'change_tag',
 588                                 'change_tag_tag_id_id',
 589                                 '( ct_tag_id, ct_rc_id, ct_rev_id, ct_log_id )'
 590                         ],
 591                         [ 'addPgIndex', 'archive', 'ar_revid_uniq', '(ar_rev_id)', 'unique' ],
 592                         [ 'dropPgIndex', 'archive', 'ar_revid' ], // Probably doesn't exist, but do it anyway.
 593                         [ 'populateContentTables' ],
 594                         [ 'addPgIndex', 'logging', 'log_type_action', '( log_type, log_action, log_timestamp )' ],
 595                         [ 'dropPgIndex', 'page_props', 'page_props_propname' ],
 596                         [ 'addIndex', 'interwiki', 'interwiki_pkey', 'patch-interwiki-pk.sql' ],
 597                         [ 'addIndex', 'protected_titles', 'protected_titles_pkey', 'patch-protected_titles-pk.sql' ],
 598                         [ 'addIndex', 'site_identifiers', 'site_identifiers_pkey', 'patch-site_identifiers-pk.sql' ],
 599                         [ 'addPgIndex', 'recentchanges', 'rc_this_oldid', '(rc_this_oldid)' ],
 600                         [ 'dropTable', 'transcache' ],
 601                         [ 'runMaintenance', PopulateChangeTagDef::class, 'maintenance/populateChangeTagDef.php' ],
 602                         [ 'addIndex', 'change_tag', 'change_tag_rc_tag_id',
 603                                 'patch-change_tag-change_tag_rc_tag_id.sql' ],
 604                         [ 'addPgField', 'ipblocks', 'ipb_sitewide', 'SMALLINT NOT NULL DEFAULT 1' ],
 605                         [ 'addTable', 'ipblocks_restrictions', 'patch-ipblocks_restrictions-table.sql' ],
 606                         [ 'migrateImageCommentTemp' ],
 607                         [ 'dropPgField', 'category', 'cat_hidden' ],
 608                         [ 'dropPgField', 'site_stats', 'ss_admins' ],
 609                         [ 'dropPgField', 'recentchanges', 'rc_cur_time' ],
 610
 611                         // 1.33
 612                         [ 'dropField', 'change_tag', 'ct_tag', 'patch-drop-ct_tag.sql' ],
 613                         [ 'dropTable', 'valid_tag' ],
 614                         [ 'dropTable', 'tag_summary' ],
 615                         [ 'dropPgField', 'archive', 'ar_comment' ],
 616                         [ 'dropDefault', 'archive', 'ar_comment_id' ],
 617                         [ 'dropPgField', 'ipblocks', 'ipb_reason' ],
 618                         [ 'dropDefault', 'ipblocks', 'ipb_reason_id' ],
 619                         [ 'dropPgField', 'image', 'img_description' ],
 620                         [ 'dropDefault', 'image', 'img_description_id' ],
 621                         [ 'dropPgField', 'oldimage', 'oi_description' ],
 622                         [ 'dropDefault', 'oldimage', 'oi_description_id' ],
 623                         [ 'dropPgField', 'filearchive', 'fa_deleted_reason' ],
 624                         [ 'dropDefault', 'filearchive', 'fa_deleted_reason_id' ],
 625                         [ 'dropPgField', 'filearchive', 'fa_description' ],
 626                         [ 'dropDefault', 'filearchive', 'fa_description_id' ],
 627                         [ 'dropPgField', 'recentchanges', 'rc_comment' ],
 628                         [ 'dropDefault', 'recentchanges', 'rc_comment_id' ],
 629                         [ 'dropPgField', 'logging', 'log_comment' ],
 630                         [ 'dropDefault', 'logging', 'log_comment_id' ],
 631                         [ 'dropPgField', 'protected_titles', 'pt_reason' ],
 632                         [ 'dropDefault', 'protected_titles', 'pt_reason_id' ],
 633
 634                         // 1.34
 635                         [ 'dropPgIndex', 'archive', 'archive_user_text' ],
 636                         [ 'dropPgField', 'archive', 'ar_user' ],
 637                         [ 'dropPgField', 'archive', 'ar_user_text' ],
 638                         [ 'dropDefault', 'archive', 'ar_actor' ],
 639                         [ 'dropPgField', 'ipblocks', 'ipb_by' ],
 640                         [ 'dropPgField', 'ipblocks', 'ipb_by_text' ],
 641                         [ 'dropDefault', 'ipblocks', 'ipb_by_actor' ],
 642                         [ 'dropPgField', 'image', 'img_user' ],
 643                         [ 'dropPgField', 'image', 'img_user_text' ],
 644                         [ 'dropDefault', 'image', 'img_actor' ],
 645                         [ 'dropPgField', 'oldimage', 'oi_user' ],
 646                         [ 'dropPgField', 'oldimage', 'oi_user_text' ],
 647                         [ 'dropDefault', 'oldimage', 'oi_actor' ],
 648                         [ 'dropPgField', 'filearchive', 'fa_user' ],
 649                         [ 'dropPgField', 'filearchive', 'fa_user_text' ],
 650                         [ 'dropDefault', 'filearchive', 'fa_actor' ],
 651                         [ 'dropPgField', 'recentchanges', 'rc_user' ],
 652                         [ 'dropPgField', 'recentchanges', 'rc_user_text' ],
 653                         [ 'dropDefault', 'recentchanges', 'rc_actor' ],
 654                         [ 'dropPgIndex', 'logging', 'logging_user_time' ],
 655                         [ 'dropPgIndex', 'logging', 'logging_user_type_time' ],
 656                         [ 'dropPgIndex', 'logging', 'logging_user_text_type_time' ],
 657                         [ 'dropPgIndex', 'logging', 'logging_user_text_time' ],
 658                         [ 'dropPgField', 'logging', 'log_user' ],
 659                         [ 'dropPgField', 'logging', 'log_user_text' ],
 660                         [ 'dropDefault', 'logging', 'log_actor' ],
 661                 ];
 662         }
 663
 664         protected function getOldGlobalUpdates() {
 665                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 666
 667                 $updates = [];
 668
 669                 # Add missing extension tables
 670                 foreach ( $wgExtNewTables as $tableRecord ) {
 671                         $updates[] = [
 672                                 'addTable', $tableRecord[0], $tableRecord[1], true
 673                         ];
 674                 }
 675
 676                 # Add missing extension fields
 677                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 678                         $updates[] = [
 679                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 680                                 $fieldRecord[2]
 681                         ];
 682                 }
 683
 684                 # Change altered columns
 685                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 686                         $updates[] = [
 687                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 688                                 $fieldRecord[2]
 689                         ];
 690                 }
 691
 692                 # Add missing extension indexes
 693                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 694                         $updates[] = [
 695                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 696                                 $fieldRecord[2]
 697                         ];
 698                 }
 699
 700                 return $updates;
 701         }
 702
 703         protected function describeTable( $table ) {
 704                 $q = <<<END
 705 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 706         WHERE pg_class.relnamespace = pg_namespace.oid
 707                 AND attrelid=pg_class.oid AND attnum > 0
 708                 AND relname=%s AND nspname=%s
 709 END;
 710                 $res = $this->db->query( sprintf( $q,
 711                         $this->db->addQuotes( $table ),
 712                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 713                 if ( !$res ) {
 714                         return null;
 715                 }
 716
 717                 $cols = [];
 718                 foreach ( $res as $r ) {
 719                         $cols[] = [
 720                                 "name" => $r[0],
 721                                 "ord" => $r[1],
 722                         ];
 723                 }
 724
 725                 return $cols;
 726         }
 727
 728         function describeIndex( $idx ) {
 729                 // first fetch the key (which is a list of columns ords) and
 730                 // the table the index applies to (an oid)
 731                 $q = <<<END
 732 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 733         WHERE nspname=%s
 734                 AND pg_class.relnamespace = pg_namespace.oid
 735                 AND relname=%s
 736                 AND indexrelid=pg_class.oid
 737 END;
 738                 $res = $this->db->query(
 739                         sprintf(
 740                                 $q,
 741                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 742                                 $this->db->addQuotes( $idx )
 743                         )
 744                 );
 745                 if ( !$res ) {
 746                         return null;
 747                 }
 748                 $r = $this->db->fetchRow( $res );
 749                 if ( !$r ) {
 750                         return null;
 751                 }
 752
 753                 $indkey = $r[0];
 754                 $relid = intval( $r[1] );
 755                 $indkeys = explode( ' ', $indkey );
 756
 757                 $colnames = [];
 758                 foreach ( $indkeys as $rid ) {
 759                         $query = <<<END
 760 SELECT attname FROM pg_class, pg_attribute
 761         WHERE attrelid=$relid
 762                 AND attnum=%d
 763                 AND attrelid=pg_class.oid
 764 END;
 765                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 766                         if ( !$r2 ) {
 767                                 return null;
 768                         }
 769                         $row2 = $this->db->fetchRow( $r2 );
 770                         if ( !$row2 ) {
 771                                 return null;
 772                         }
 773                         $colnames[] = $row2[0];
 774                 }
 775
 776                 return $colnames;
 777         }
 778
 779         function fkeyDeltype( $fkey ) {
 780                 $q = <<<END
 781 SELECT confdeltype FROM pg_constraint, pg_namespace
 782         WHERE connamespace=pg_namespace.oid
 783                 AND nspname=%s
 784                 AND conname=%s;
 785 END;
 786                 $r = $this->db->query(
 787                         sprintf(
 788                                 $q,
 789                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 790                                 $this->db->addQuotes( $fkey )
 791                         )
 792                 );
 793                 $row = $this->db->fetchRow( $r );
 794                 if ( !$row ) {
 795                         return null;
 796                 }
 797
 798                 return $row[0];
 799         }
 800
 801         function ruleDef( $table, $rule ) {
 802                 $q = <<<END
 803 SELECT definition FROM pg_rules
 804         WHERE schemaname = %s
 805                 AND tablename = %s
 806                 AND rulename = %s
 807 END;
 808                 $r = $this->db->query(
 809                         sprintf(
 810                                 $q,
 811                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 812                                 $this->db->addQuotes( $table ),
 813                                 $this->db->addQuotes( $rule )
 814                         )
 815                 );
 816                 $row = $this->db->fetchRow( $r );
 817                 if ( !$row ) {
 818                         return null;
 819                 }
 820                 $d = $row[0];
 821
 822                 return $d;
 823         }
 824
 825         protected function addSequence( $table, $pkey, $ns ) {
 826                 if ( !$this->db->sequenceExists( $ns ) ) {
 827                         $this->output( "Creating sequence $ns\n" );
 828                         if ( $pkey !== false ) {
 829                                 $this->db->query( "CREATE SEQUENCE $ns OWNED BY $table.$pkey" );
 830                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 831                         } else {
 832                                 $this->db->query( "CREATE SEQUENCE $ns" );
 833                         }
 834                 }
 835         }
 836
 837         protected function dropSequence( $table, $ns ) {
 838                 if ( $this->db->sequenceExists( $ns ) ) {
 839                         $this->output( "Dropping sequence $ns\n" );
 840                         $this->db->query( "DROP SEQUENCE $ns CASCADE" );
 841                 }
 842         }
 843
 844         protected function renameSequence( $old, $new ) {
 845                 if ( $this->db->sequenceExists( $new ) ) {
 846                         $this->output( "...sequence $new already exists.\n" );
 847
 848                         return;
 849                 }
 850                 if ( $this->db->sequenceExists( $old ) ) {
 851                         $this->output( "Renaming sequence $old to $new\n" );
 852                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 853                 }
 854         }
 855
 856         protected function setSequenceOwner( $table, $pkey, $seq ) {
 857                 if ( $this->db->sequenceExists( $seq ) ) {
 858                         $this->output( "Setting sequence $seq owner to $table.$pkey\n" );
 859                         $this->db->query( "ALTER SEQUENCE $seq OWNED BY $table.$pkey" );
 860                 }
 861         }
 862
 863         protected function renameTable( $old, $new, $patch = false ) {
 864                 if ( $this->db->tableExists( $old ) ) {
 865                         $this->output( "Renaming table $old to $new\n" );
 866                         $old = $this->db->realTableName( $old, "quoted" );
 867                         $new = $this->db->realTableName( $new, "quoted" );
 868                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 869                         if ( $patch !== false ) {
 870                                 $this->applyPatch( $patch );
 871                         }
 872                 }
 873         }
 874
 875         protected function renameIndex(
 876                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 877         ) {
 878                 // First requirement: the table must exist
 879                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 880                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 881
 882                         return true;
 883                 }
 884
 885                 // Second requirement: the new index must be missing
 886                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 887                         $this->output( "...index $new already set on $table table.\n" );
 888                         if ( !$skipBothIndexExistWarning
 889                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 890                         ) {
 891                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 892                                         "renamed into $new (which also exists).\n" .
 893                                         "            $old should be manually removed if not needed anymore.\n" );
 894                         }
 895
 896                         return true;
 897                 }
 898
 899                 // Third requirement: the old index must exist
 900                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 901                         $this->output( "...skipping: index $old doesn't exist.\n" );
 902
 903                         return true;
 904                 }
 905
 906                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 907                 return true;
 908         }
 909
 910         protected function dropPgField( $table, $field ) {
 911                 $fi = $this->db->fieldInfo( $table, $field );
 912                 if ( is_null( $fi ) ) {
 913                         $this->output( "...$table table does not contain $field field.\n" );
 914
 915                         return;
 916                 } else {
 917                         $this->output( "Dropping column '$table.$field'\n" );
 918                         $this->db->query( "ALTER TABLE $table DROP COLUMN $field" );
 919                 }
 920         }
 921
 922         protected function addPgField( $table, $field, $type ) {
 923                 $fi = $this->db->fieldInfo( $table, $field );
 924                 if ( !is_null( $fi ) ) {
 925                         $this->output( "...column '$table.$field' already exists\n" );
 926
 927                         return;
 928                 } else {
 929                         $this->output( "Adding column '$table.$field'\n" );
 930                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 931                 }
 932         }
 933
 934         protected function changeField( $table, $field, $newtype, $default ) {
 935                 $fi = $this->db->fieldInfo( $table, $field );
 936                 if ( is_null( $fi ) ) {
 937                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 938                         exit( 1 );
 939                 }
 940
 941                 if ( $fi->type() === $newtype ) {
 942                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 943                 } else {
 944                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 945                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 946                         if ( strlen( $default ) ) {
 947                                 $res = [];
 948                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 949                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 950                                         $this->db->query( $sqldef );
 951                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 952                                 }
 953                                 $sql .= " USING $default";
 954                         }
 955                         $this->db->query( $sql );
 956                 }
 957         }
 958
 959         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 960                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 961                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 962                 $fi = $this->db->fieldInfo( $table, $field );
 963                 if ( is_null( $fi ) ) {
 964                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 965                         exit( 1 );
 966                 }
 967
 968                 if ( $fi->type() === $newtype ) {
 969                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 970                 } else {
 971                         $this->output( "Purging data from cache table '$table'\n" );
 972                         $this->db->query( "DELETE from $table" );
 973                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 974                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 975                         if ( strlen( $default ) ) {
 976                                 $res = [];
 977                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 978                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 979                                         $this->db->query( $sqldef );
 980                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 981                                 }
 982                                 $sql .= " USING $default";
 983                         }
 984                         $this->db->query( $sql );
 985                 }
 986         }
 987
 988         protected function setDefault( $table, $field, $default ) {
 989                 $info = $this->db->fieldInfo( $table, $field );
 990                 if ( $info && $info->defaultValue() !== $default ) {
 991                         $this->output( "Changing '$table.$field' default value\n" );
 992                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT "
 993                                 . $this->db->addQuotes( $default ) );
 994                 }
 995         }
 996
 997         /**
 998          * Drop a default value from a field
 999          * @since 1.32
1000          * @param string $table
1001          * @param string $field
1002          */
1003         protected function dropDefault( $table, $field ) {
1004                 $info = $this->db->fieldInfo( $table, $field );
1005                 if ( $info->defaultValue() !== false ) {
1006                         $this->output( "Removing '$table.$field' default value\n" );
1007                         $this->db->query( "ALTER TABLE $table ALTER $field DROP DEFAULT" );
1008                 }
1009         }
1010
1011         protected function changeNullableField( $table, $field, $null, $update = false ) {
1012                 $fi = $this->db->fieldInfo( $table, $field );
1013                 if ( is_null( $fi ) ) {
1014                         return;
1015                 }
1016                 if ( $fi->isNullable() ) {
1017                         # # It's NULL - does it need to be NOT NULL?
1018                         if ( $null === 'NOT NULL' ) {
1019                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
1020                                 if ( $update ) {
1021                                         $this->db->query( "UPDATE $table SET $field = DEFAULT WHERE $field IS NULL" );
1022                                 }
1023                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
1024                         } else {
1025                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
1026                         }
1027                 } else {
1028                         # # It's NOT NULL - does it need to be NULL?
1029                         if ( $null === 'NULL' ) {
1030                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
1031                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
1032                         } else {
1033                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
1034                         }
1035                 }
1036         }
1037
1038         public function addPgIndex( $table, $index, $type, $unique = false ) {
1039                 if ( $this->db->indexExists( $table, $index ) ) {
1040                         $this->output( "...index '$index' on table '$table' already exists\n" );
1041                 } else {
1042                         $this->output( "Creating index '$index' on table '$table' $type\n" );
1043                         $unique = $unique ? 'UNIQUE' : '';
1044                         $this->db->query( "CREATE $unique INDEX $index ON $table $type" );
1045                 }
1046         }
1047
1048         public function addPgExtIndex( $table, $index, $type ) {
1049                 if ( $this->db->indexExists( $table, $index ) ) {
1050                         $this->output( "...index '$index' on table '$table' already exists\n" );
1051                 } elseif ( preg_match( '/^\(/', $type ) ) {
1052                         $this->output( "Creating index '$index' on table '$table'\n" );
1053                         $this->db->query( "CREATE INDEX $index ON $table $type" );
1054                 } else {
1055                         $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
1056                 }
1057         }
1058
1059         /**
1060          * Add a value to an existing PostgreSQL enum type
1061          * @since 1.31
1062          * @param string $type Type name. Must be in the core schema.
1063          * @param string $value Value to add.
1064          */
1065         public function addPgEnumValue( $type, $value ) {
1066                 $row = $this->db->selectRow(
1067                         [
1068                                 't' => 'pg_catalog.pg_type',
1069                                 'n' => 'pg_catalog.pg_namespace',
1070                                 'e' => 'pg_catalog.pg_enum',
1071                         ],
1072                         [ 't.typname', 't.typtype', 'e.enumlabel' ],
1073                         [
1074                                 't.typname' => $type,
1075                                 'n.nspname' => $this->db->getCoreSchema(),
1076                         ],
1077                         __METHOD__,
1078                         [],
1079                         [
1080                                 'n' => [ 'JOIN', 't.typnamespace = n.oid' ],
1081                                 'e' => [ 'LEFT JOIN', [ 'e.enumtypid = t.oid', 'e.enumlabel' => $value ] ],
1082                         ]
1083                 );
1084
1085                 if ( !$row ) {
1086                         $this->output( "...Type $type does not exist, skipping modify enum.\n" );
1087                 } elseif ( $row->typtype !== 'e' ) {
1088                         $this->output( "...Type $type does not seem to be an enum, skipping modify enum.\n" );
1089                 } elseif ( $row->enumlabel === $value ) {
1090                         $this->output( "...Enum type $type already contains value '$value'.\n" );
1091                 } else {
1092                         $this->output( "...Adding value '$value' to enum type $type.\n" );
1093                         $etype = $this->db->addIdentifierQuotes( $type );
1094                         $evalue = $this->db->addQuotes( $value );
1095                         $this->db->query( "ALTER TYPE $etype ADD VALUE $evalue" );
1096                 }
1097         }
1098
1099         protected function dropFkey( $table, $field ) {
1100                 $fi = $this->db->fieldInfo( $table, $field );
1101                 if ( is_null( $fi ) ) {
1102                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
1103                                 "Please report this.\n" );
1104                         return;
1105                 }
1106                 $conname = $fi->conname();
1107                 if ( $fi->conname() ) {
1108                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
1109                         $conclause = "CONSTRAINT \"$conname\"";
1110                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
1111                         $this->db->query( $command );
1112                 } else {
1113                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
1114                 }
1115         }
1116
1117         protected function changeFkeyDeferrable( $table, $field, $clause ) {
1118                 $fi = $this->db->fieldInfo( $table, $field );
1119                 if ( is_null( $fi ) ) {
1120                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
1121                                 "Please report this.\n" );
1122
1123                         return;
1124                 }
1125                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
1126                         return;
1127                 }
1128                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
1129                 $conname = $fi->conname();
1130                 if ( $fi->conname() ) {
1131                         $conclause = "CONSTRAINT \"$conname\"";
1132                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
1133                         $this->db->query( $command );
1134                 } else {
1135                         $this->output( "Column '$table.$field' does not have a foreign key " .
1136                                 "constraint, will be added\n" );
1137                         $conclause = "";
1138                 }
1139                 $command =
1140                         "ALTER TABLE $table ADD $conclause " .
1141                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
1142                 $this->db->query( $command );
1143         }
1144
1145         protected function convertArchive2() {
1146                 if ( $this->db->tableExists( "archive2" ) ) {
1147                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
1148                                 $this->output( "Dropping rule 'archive_insert'\n" );
1149                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
1150                         }
1151                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
1152                                 $this->output( "Dropping rule 'archive_delete'\n" );
1153                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
1154                         }
1155                         $this->applyPatch(
1156                                 'patch-remove-archive2.sql',
1157                                 false,
1158                                 "Converting 'archive2' back to normal archive table"
1159                         );
1160                 } else {
1161                         $this->output( "...obsolete table 'archive2' does not exist\n" );
1162                 }
1163         }
1164
1165         protected function checkOiDeleted() {
1166                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
1167                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
1168                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
1169                         $this->db->query(
1170                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
1171                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
1172                 } else {
1173                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
1174                 }
1175         }
1176
1177         protected function checkOiNameConstraint() {
1178                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
1179                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
1180                                 "foreign key to image\n" );
1181                 } else {
1182                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
1183                                 $this->db->query(
1184                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
1185                         }
1186                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
1187                                 $this->db->query(
1188                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
1189                         }
1190                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
1191                         $this->db->query(
1192                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
1193                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
1194                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
1195                 }
1196         }
1197
1198         protected function checkPageDeletedTrigger() {
1199                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
1200                         $this->applyPatch(
1201                                 'patch-page_deleted.sql',
1202                                 false,
1203                                 "Adding function and trigger 'page_deleted' to table 'page'"
1204                         );
1205                 } else {
1206                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
1207                 }
1208         }
1209
1210         protected function dropPgIndex( $table, $index ) {
1211                 if ( $this->db->indexExists( $table, $index ) ) {
1212                         $this->output( "Dropping obsolete index '$index'\n" );
1213                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
1214                 }
1215         }
1216
1217         protected function checkIndex( $index, $should_be, $good_def ) {
1218                 $pu = $this->db->indexAttributes( $index );
1219                 if ( !empty( $pu ) && $pu != $should_be ) {
1220                         $this->output( "Dropping obsolete version of index '$index'\n" );
1221                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
1222                         $pu = [];
1223                 } else {
1224                         $this->output( "...no need to drop index '$index'\n" );
1225                 }
1226
1227                 if ( empty( $pu ) ) {
1228                         $this->output( "Creating index '$index'\n" );
1229                         $this->db->query( $good_def );
1230                 } else {
1231                         $this->output( "...index '$index' exists\n" );
1232                 }
1233         }
1234
1235         protected function checkRevUserFkey() {
1236                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
1237                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
1238                 } else {
1239                         $this->applyPatch(
1240                                 'patch-revision_rev_user_fkey.sql',
1241                                 false,
1242                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
1243                         );
1244                 }
1245         }
1246
1247         protected function checkIwlPrefix() {
1248                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
1249                         $this->applyPatch(
1250                                 'patch-rename-iwl_prefix.sql',
1251                                 false,
1252                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
1253                         );
1254                 }
1255         }
1256
1257         protected function addInterwikiType() {
1258                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
1259         }
1260
1261         protected function tsearchFixes() {
1262                 # Tweak the page_title tsearch2 trigger to filter out slashes
1263                 # This is create or replace, so harmless to call if not needed
1264                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
1265
1266                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
1267                 # in case they have the old 'default' versions
1268                 # Gather version numbers in case we need them
1269                 if ( $this->db->getServerVersion() >= 8.3 ) {
1270                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
1271                 }
1272         }
1273
1274         protected function rebuildTextSearch() {
1275                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
1276                         $this->output( "...T68650 already fixed or not applicable.\n" );
1277                         return;
1278                 }
1279                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
1280                         'Rebuilding text search for T68650' );
1281         }
1282 }