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