includes/installer/PostgresUpdater.php

   1 <?php
   2 /**
   3  * PostgreSQL-specific updater.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for handling updates to Postgres databases.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class PostgresUpdater extends DatabaseUpdater {
  31
  32         /**
  33          * @var DatabasePostgres
  34          */
  35         protected $db;
  36
  37         /**
  38          * @todo FIXME: Postgres should use sequential updates like Mysql, Sqlite
  39          * and everybody else. It never got refactored like it should've.
  40          * @return array
  41          */
  42         protected function getCoreUpdateList() {
  43                 return [
  44                         # rename tables 1.7.3
  45                         # r15791 Change reserved word table names "user" and "text"
  46                         [ 'renameTable', 'user', 'mwuser' ],
  47                         [ 'renameTable', 'text', 'pagecontent' ],
  48                         [ 'renameIndex', 'mwuser', 'user_pkey', 'mwuser_pkey' ],
  49                         [ 'renameIndex', 'mwuser', 'user_user_name_key', 'mwuser_user_name_key' ],
  50                         [ 'renameIndex', 'pagecontent', 'text_pkey', 'pagecontent_pkey' ],
  51
  52                         # renamed sequences
  53                         [ 'renameSequence', 'ipblocks_ipb_id_val', 'ipblocks_ipb_id_seq' ],
  54                         [ 'renameSequence', 'rev_rev_id_val', 'revision_rev_id_seq' ],
  55                         [ 'renameSequence', 'text_old_id_val', 'text_old_id_seq' ],
  56                         [ 'renameSequence', 'rc_rc_id_seq', 'recentchanges_rc_id_seq' ],
  57                         [ 'renameSequence', 'log_log_id_seq', 'logging_log_id_seq' ],
  58                         [ 'renameSequence', 'pr_id_val', 'page_restrictions_pr_id_seq' ],
  59                         [ 'renameSequence', 'us_id_seq', 'uploadstash_us_id_seq' ],
  60
  61                         # since r58263
  62                         [ 'renameSequence', 'category_id_seq', 'category_cat_id_seq' ],
  63
  64                         # new sequences if not renamed above
  65                         [ 'addSequence', 'logging', false, 'logging_log_id_seq' ],
  66                         [ 'addSequence', 'page_restrictions', false, 'page_restrictions_pr_id_seq' ],
  67                         [ 'addSequence', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ],
  68                         [ 'addSequence', 'archive', false, 'archive_ar_id_seq' ],
  69                         [ 'addSequence', 'externallinks', false, 'externallinks_el_id_seq' ],
  70
  71                         # new tables
  72                         [ 'addTable', 'category', 'patch-category.sql' ],
  73                         [ 'addTable', 'page', 'patch-page.sql' ],
  74                         [ 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ],
  75                         [ 'addTable', 'page_props', 'patch-page_props.sql' ],
  76                         [ 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ],
  77                         [ 'addTable', 'profiling', 'patch-profiling.sql' ],
  78                         [ 'addTable', 'protected_titles', 'patch-protected_titles.sql' ],
  79                         [ 'addTable', 'redirect', 'patch-redirect.sql' ],
  80                         [ 'addTable', 'updatelog', 'patch-updatelog.sql' ],
  81                         [ 'addTable', 'change_tag', 'patch-change_tag.sql' ],
  82                         [ 'addTable', 'tag_summary', 'patch-tag_summary.sql' ],
  83                         [ 'addTable', 'valid_tag', 'patch-valid_tag.sql' ],
  84                         [ 'addTable', 'user_properties', 'patch-user_properties.sql' ],
  85                         [ 'addTable', 'log_search', 'patch-log_search.sql' ],
  86                         [ 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ],
  87                         [ 'addTable', 'iwlinks', 'patch-iwlinks.sql' ],
  88                         [ 'addTable', 'module_deps', 'patch-module_deps.sql' ],
  89                         [ 'addTable', 'uploadstash', 'patch-uploadstash.sql' ],
  90                         [ 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ],
  91                         [ 'addTable', 'sites', 'patch-sites.sql' ],
  92                         [ 'addTable', 'bot_passwords', 'patch-bot_passwords.sql' ],
  93
  94                         # Needed before new field
  95                         [ 'convertArchive2' ],
  96
  97                         # new fields
  98                         [ 'addPgField', 'updatelog', 'ul_value', 'TEXT' ],
  99                         [ 'addPgField', 'archive', 'ar_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 100                         [ 'addPgField', 'archive', 'ar_len', 'INTEGER' ],
 101                         [ 'addPgField', 'archive', 'ar_page_id', 'INTEGER' ],
 102                         [ 'addPgField', 'archive', 'ar_parent_id', 'INTEGER' ],
 103                         [ 'addPgField', 'archive', 'ar_content_model', 'TEXT' ],
 104                         [ 'addPgField', 'archive', 'ar_content_format', 'TEXT' ],
 105                         [ 'addPgField', 'categorylinks', 'cl_sortkey_prefix', "TEXT NOT NULL DEFAULT ''" ],
 106                         [ 'addPgField', 'categorylinks', 'cl_collation', "TEXT NOT NULL DEFAULT 0" ],
 107                         [ 'addPgField', 'categorylinks', 'cl_type', "TEXT NOT NULL DEFAULT 'page'" ],
 108                         [ 'addPgField', 'image', 'img_sha1', "TEXT NOT NULL DEFAULT ''" ],
 109                         [ 'addPgField', 'ipblocks', 'ipb_allow_usertalk', 'SMALLINT NOT NULL DEFAULT 0' ],
 110                         [ 'addPgField', 'ipblocks', 'ipb_anon_only', 'SMALLINT NOT NULL DEFAULT 0' ],
 111                         [ 'addPgField', 'ipblocks', 'ipb_by_text', "TEXT NOT NULL DEFAULT ''" ],
 112                         [ 'addPgField', 'ipblocks', 'ipb_block_email', 'SMALLINT NOT NULL DEFAULT 0' ],
 113                         [ 'addPgField', 'ipblocks', 'ipb_create_account', 'SMALLINT NOT NULL DEFAULT 1' ],
 114                         [ 'addPgField', 'ipblocks', 'ipb_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 115                         [ 'addPgField', 'ipblocks', 'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ],
 116                         [ 'addPgField', 'ipblocks', 'ipb_parent_block_id',
 117                                 'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ' .
 118                                 'ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ],
 119                         [ 'addPgField', 'filearchive', 'fa_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 120                         [ 'addPgField', 'filearchive', 'fa_sha1', "TEXT NOT NULL DEFAULT ''" ],
 121                         [ 'addPgField', 'logging', 'log_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 122                         [ 'addPgField', 'logging', 'log_id',
 123                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ],
 124                         [ 'addPgField', 'logging', 'log_params', 'TEXT' ],
 125                         [ 'addPgField', 'mwuser', 'user_editcount', 'INTEGER' ],
 126                         [ 'addPgField', 'mwuser', 'user_newpass_time', 'TIMESTAMPTZ' ],
 127                         [ 'addPgField', 'oldimage', 'oi_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 128                         [ 'addPgField', 'oldimage', 'oi_major_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 129                         [ 'addPgField', 'oldimage', 'oi_media_type', 'TEXT' ],
 130                         [ 'addPgField', 'oldimage', 'oi_metadata', "BYTEA NOT NULL DEFAULT ''" ],
 131                         [ 'addPgField', 'oldimage', 'oi_minor_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 132                         [ 'addPgField', 'oldimage', 'oi_sha1', "TEXT NOT NULL DEFAULT ''" ],
 133                         [ 'addPgField', 'page', 'page_content_model', 'TEXT' ],
 134                         [ 'addPgField', 'page_restrictions', 'pr_id',
 135                                 "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ],
 136                         [ 'addPgField', 'profiling', 'pf_memory', 'NUMERIC(18,10) NOT NULL DEFAULT 0' ],
 137                         [ 'addPgField', 'recentchanges', 'rc_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 138                         [ 'addPgField', 'recentchanges', 'rc_log_action', 'TEXT' ],
 139                         [ 'addPgField', 'recentchanges', 'rc_log_type', 'TEXT' ],
 140                         [ 'addPgField', 'recentchanges', 'rc_logid', 'INTEGER NOT NULL DEFAULT 0' ],
 141                         [ 'addPgField', 'recentchanges', 'rc_new_len', 'INTEGER' ],
 142                         [ 'addPgField', 'recentchanges', 'rc_old_len', 'INTEGER' ],
 143                         [ 'addPgField', 'recentchanges', 'rc_params', 'TEXT' ],
 144                         [ 'addPgField', 'redirect', 'rd_interwiki', 'TEXT NULL' ],
 145                         [ 'addPgField', 'redirect', 'rd_fragment', 'TEXT NULL' ],
 146                         [ 'addPgField', 'revision', 'rev_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 147                         [ 'addPgField', 'revision', 'rev_len', 'INTEGER' ],
 148                         [ 'addPgField', 'revision', 'rev_parent_id', 'INTEGER DEFAULT NULL' ],
 149                         [ 'addPgField', 'revision', 'rev_content_model', 'TEXT' ],
 150                         [ 'addPgField', 'revision', 'rev_content_format', 'TEXT' ],
 151                         [ 'addPgField', 'site_stats', 'ss_active_users', "INTEGER DEFAULT '-1'" ],
 152                         [ 'addPgField', 'user_newtalk', 'user_last_timestamp', 'TIMESTAMPTZ' ],
 153                         [ 'addPgField', 'logging', 'log_user_text', "TEXT NOT NULL DEFAULT ''" ],
 154                         [ 'addPgField', 'logging', 'log_page', 'INTEGER' ],
 155                         [ 'addPgField', 'interwiki', 'iw_api', "TEXT NOT NULL DEFAULT ''" ],
 156                         [ 'addPgField', 'interwiki', 'iw_wikiid', "TEXT NOT NULL DEFAULT ''" ],
 157                         [ 'addPgField', 'revision', 'rev_sha1', "TEXT NOT NULL DEFAULT ''" ],
 158                         [ 'addPgField', 'archive', 'ar_sha1', "TEXT NOT NULL DEFAULT ''" ],
 159                         [ 'addPgField', 'uploadstash', 'us_chunk_inx', "INTEGER NULL" ],
 160                         [ 'addPgField', 'job', 'job_timestamp', "TIMESTAMPTZ" ],
 161                         [ 'addPgField', 'job', 'job_random', "INTEGER NOT NULL DEFAULT 0" ],
 162                         [ 'addPgField', 'job', 'job_attempts', "INTEGER NOT NULL DEFAULT 0" ],
 163                         [ 'addPgField', 'job', 'job_token', "TEXT NOT NULL DEFAULT ''" ],
 164                         [ 'addPgField', 'job', 'job_token_timestamp', "TIMESTAMPTZ" ],
 165                         [ 'addPgField', 'job', 'job_sha1', "TEXT NOT NULL DEFAULT ''" ],
 166                         [ 'addPgField', 'archive', 'ar_id',
 167                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('archive_ar_id_seq')" ],
 168                         [ 'addPgField', 'externallinks', 'el_id',
 169                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('externallinks_el_id_seq')" ],
 170                         [ 'addPgField', 'uploadstash', 'us_props', "BYTEA" ],
 171
 172                         # type changes
 173                         [ 'changeField', 'archive', 'ar_deleted', 'smallint', '' ],
 174                         [ 'changeField', 'archive', 'ar_minor_edit', 'smallint',
 175                                 'ar_minor_edit::smallint DEFAULT 0' ],
 176                         [ 'changeField', 'filearchive', 'fa_deleted', 'smallint', '' ],
 177                         [ 'changeField', 'filearchive', 'fa_height', 'integer', '' ],
 178                         [ 'changeField', 'filearchive', 'fa_metadata', 'bytea', "decode(fa_metadata,'escape')" ],
 179                         [ 'changeField', 'filearchive', 'fa_size', 'integer', '' ],
 180                         [ 'changeField', 'filearchive', 'fa_width', 'integer', '' ],
 181                         [ 'changeField', 'filearchive', 'fa_storage_group', 'text', '' ],
 182                         [ 'changeField', 'filearchive', 'fa_storage_key', 'text', '' ],
 183                         [ 'changeField', 'image', 'img_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 184                         [ 'changeField', 'image', 'img_size', 'integer', '' ],
 185                         [ 'changeField', 'image', 'img_width', 'integer', '' ],
 186                         [ 'changeField', 'image', 'img_height', 'integer', '' ],
 187                         [ 'changeField', 'interwiki', 'iw_local', 'smallint', 'iw_local::smallint' ],
 188                         [ 'changeField', 'interwiki', 'iw_trans', 'smallint', 'iw_trans::smallint DEFAULT 0' ],
 189                         [ 'changeField', 'ipblocks', 'ipb_auto', 'smallint', 'ipb_auto::smallint DEFAULT 0' ],
 190                         [ 'changeField', 'ipblocks', 'ipb_anon_only', 'smallint',
 191                                 "CASE WHEN ipb_anon_only=' ' THEN 0 ELSE ipb_anon_only::smallint END DEFAULT 0" ],
 192                         [ 'changeField', 'ipblocks', 'ipb_create_account', 'smallint',
 193                                 "CASE WHEN ipb_create_account=' ' THEN 0 ELSE ipb_create_account::smallint END DEFAULT 1" ],
 194                         [ 'changeField', 'ipblocks', 'ipb_enable_autoblock', 'smallint',
 195                                 "CASE WHEN ipb_enable_autoblock=' ' THEN 0 ELSE ipb_enable_autoblock::smallint END DEFAULT 1" ],
 196                         [ 'changeField', 'ipblocks', 'ipb_block_email', 'smallint',
 197                                 "CASE WHEN ipb_block_email=' ' THEN 0 ELSE ipb_block_email::smallint END DEFAULT 0" ],
 198                         [ 'changeField', 'ipblocks', 'ipb_address', 'text', 'ipb_address::text' ],
 199                         [ 'changeField', 'ipblocks', 'ipb_deleted', 'smallint', 'ipb_deleted::smallint DEFAULT 0' ],
 200                         [ 'changeField', 'mwuser', 'user_token', 'text', '' ],
 201                         [ 'changeField', 'mwuser', 'user_email_token', 'text', '' ],
 202                         [ 'changeField', 'objectcache', 'keyname', 'text', '' ],
 203                         [ 'changeField', 'oldimage', 'oi_height', 'integer', '' ],
 204                         [ 'changeField', 'oldimage', 'oi_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 205                         [ 'changeField', 'oldimage', 'oi_size', 'integer', '' ],
 206                         [ 'changeField', 'oldimage', 'oi_width', 'integer', '' ],
 207                         [ 'changeField', 'page', 'page_is_redirect', 'smallint',
 208                                 'page_is_redirect::smallint DEFAULT 0' ],
 209                         [ 'changeField', 'page', 'page_is_new', 'smallint', 'page_is_new::smallint DEFAULT 0' ],
 210                         [ 'changeField', 'querycache', 'qc_value', 'integer', '' ],
 211                         [ 'changeField', 'querycachetwo', 'qcc_value', 'integer', '' ],
 212                         [ 'changeField', 'recentchanges', 'rc_bot', 'smallint', 'rc_bot::smallint DEFAULT 0' ],
 213                         [ 'changeField', 'recentchanges', 'rc_deleted', 'smallint', '' ],
 214                         [ 'changeField', 'recentchanges', 'rc_minor', 'smallint', 'rc_minor::smallint DEFAULT 0' ],
 215                         [ 'changeField', 'recentchanges', 'rc_new', 'smallint', 'rc_new::smallint DEFAULT 0' ],
 216                         [ 'changeField', 'recentchanges', 'rc_type', 'smallint', 'rc_type::smallint DEFAULT 0' ],
 217                         [ 'changeField', 'recentchanges', 'rc_patrolled', 'smallint',
 218                                 'rc_patrolled::smallint DEFAULT 0' ],
 219                         [ 'changeField', 'revision', 'rev_deleted', 'smallint', 'rev_deleted::smallint DEFAULT 0' ],
 220                         [ 'changeField', 'revision', 'rev_minor_edit', 'smallint',
 221                                 'rev_minor_edit::smallint DEFAULT 0' ],
 222                         [ 'changeField', 'templatelinks', 'tl_namespace', 'smallint', 'tl_namespace::smallint' ],
 223                         [ 'changeField', 'user_newtalk', 'user_ip', 'text', 'host(user_ip)' ],
 224                         [ 'changeField', 'uploadstash', 'us_image_bits', 'smallint', '' ],
 225                         [ 'changeField', 'profiling', 'pf_time', 'float', '' ],
 226                         [ 'changeField', 'profiling', 'pf_memory', 'float', '' ],
 227
 228                         # null changes
 229                         [ 'changeNullableField', 'oldimage', 'oi_bits', 'NULL' ],
 230                         [ 'changeNullableField', 'oldimage', 'oi_timestamp', 'NULL' ],
 231                         [ 'changeNullableField', 'oldimage', 'oi_major_mime', 'NULL' ],
 232                         [ 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NULL' ],
 233                         [ 'changeNullableField', 'image', 'img_metadata', 'NOT NULL' ],
 234                         [ 'changeNullableField', 'filearchive', 'fa_metadata', 'NOT NULL' ],
 235                         [ 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NULL' ],
 236                         [ 'changeNullableField', 'recentchanges', 'rc_cur_time', 'NULL' ],
 237
 238                         [ 'checkOiDeleted' ],
 239
 240                         # New indexes
 241                         [ 'addPgIndex', 'archive', 'archive_user_text', '(ar_user_text)' ],
 242                         [ 'addPgIndex', 'image', 'img_sha1', '(img_sha1)' ],
 243                         [ 'addPgIndex', 'ipblocks', 'ipb_parent_block_id', '(ipb_parent_block_id)' ],
 244                         [ 'addPgIndex', 'oldimage', 'oi_sha1', '(oi_sha1)' ],
 245                         [ 'addPgIndex', 'page', 'page_mediawiki_title', '(page_title) WHERE page_namespace = 8' ],
 246                         [ 'addPgIndex', 'pagelinks', 'pagelinks_title', '(pl_title)' ],
 247                         [ 'addPgIndex', 'page_props', 'pp_propname_page', '(pp_propname, pp_page)' ],
 248                         [ 'addPgIndex', 'revision', 'rev_text_id_idx', '(rev_text_id)' ],
 249                         [ 'addPgIndex', 'recentchanges', 'rc_timestamp_bot', '(rc_timestamp) WHERE rc_bot = 0' ],
 250                         [ 'addPgIndex', 'templatelinks', 'templatelinks_from', '(tl_from)' ],
 251                         [ 'addPgIndex', 'watchlist', 'wl_user', '(wl_user)' ],
 252                         [ 'addPgIndex', 'watchlist', 'wl_user_notificationtimestamp',
 253                                 '(wl_user, wl_notificationtimestamp)' ],
 254                         [ 'addPgIndex', 'logging', 'logging_user_type_time',
 255                                 '(log_user, log_type, log_timestamp)' ],
 256                         [ 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ],
 257                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ],
 258                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ],
 259                         [ 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ],
 260                         [ 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ],
 261                         [ 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ],
 262                         [ 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ],
 263                         [ 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ],
 264                         [ 'addPgIndex', 'logging', 'logging_user_text_type_time',
 265                                 '(log_user_text, log_type, log_timestamp)' ],
 266                         [ 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ],
 267
 268                         [ 'checkIndex', 'pagelink_unique', [
 269                                 [ 'pl_from', 'int4_ops', 'btree', 0 ],
 270                                 [ 'pl_namespace', 'int2_ops', 'btree', 0 ],
 271                                 [ 'pl_title', 'text_ops', 'btree', 0 ],
 272                         ],
 273                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ],
 274                         [ 'checkIndex', 'cl_sortkey', [
 275                                 [ 'cl_to', 'text_ops', 'btree', 0 ],
 276                                 [ 'cl_sortkey', 'text_ops', 'btree', 0 ],
 277                                 [ 'cl_from', 'int4_ops', 'btree', 0 ],
 278                         ],
 279                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 280                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ],
 281                         [ 'checkIndex', 'iwl_prefix_title_from', [
 282                                 [ 'iwl_prefix', 'text_ops', 'btree', 0 ],
 283                                 [ 'iwl_title', 'text_ops', 'btree', 0 ],
 284                                 [ 'iwl_from', 'int4_ops', 'btree', 0 ],
 285                         ],
 286                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 287                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ],
 288                         [ 'checkIndex', 'logging_times', [
 289                                 [ 'log_timestamp', 'timestamptz_ops', 'btree', 0 ],
 290                         ],
 291                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ],
 292                         [ 'dropIndex', 'oldimage', 'oi_name' ],
 293                         [ 'checkIndex', 'oi_name_archive_name', [
 294                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 295                                 [ 'oi_archive_name', 'text_ops', 'btree', 0 ],
 296                         ],
 297                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 298                                 'USING "btree" ("oi_name", "oi_archive_name")' ],
 299                         [ 'checkIndex', 'oi_name_timestamp', [
 300                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 301                                 [ 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ],
 302                         ],
 303                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 304                                 'USING "btree" ("oi_name", "oi_timestamp")' ],
 305                         [ 'checkIndex', 'page_main_title', [
 306                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 307                         ],
 308                         'CREATE INDEX "page_main_title" ON "page" ' .
 309                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ],
 310                         [ 'checkIndex', 'page_mediawiki_title', [
 311                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 312                         ],
 313                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 314                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ],
 315                         [ 'checkIndex', 'page_project_title', [
 316                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 317                         ],
 318                         'CREATE INDEX "page_project_title" ON "page" ' .
 319                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 320                                 'WHERE ("page_namespace" = 4)' ],
 321                         [ 'checkIndex', 'page_talk_title', [
 322                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 323                         ],
 324                         'CREATE INDEX "page_talk_title" ON "page" ' .
 325                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 326                                 'WHERE ("page_namespace" = 1)' ],
 327                         [ 'checkIndex', 'page_user_title', [
 328                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 329                         ],
 330                         'CREATE INDEX "page_user_title" ON "page" ' .
 331                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 332                                 '("page_namespace" = 2)' ],
 333                         [ 'checkIndex', 'page_utalk_title', [
 334                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 335                         ],
 336                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 337                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 338                                 'WHERE ("page_namespace" = 3)' ],
 339                         [ 'checkIndex', 'ts2_page_text', [
 340                                 [ 'textvector', 'tsvector_ops', 'gist', 0 ],
 341                         ],
 342                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ],
 343                         [ 'checkIndex', 'ts2_page_title', [
 344                                 [ 'titlevector', 'tsvector_ops', 'gist', 0 ],
 345                         ],
 346                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ],
 347
 348                         [ 'checkOiNameConstraint' ],
 349                         [ 'checkPageDeletedTrigger' ],
 350                         [ 'checkRevUserFkey' ],
 351                         [ 'dropIndex', 'ipblocks', 'ipb_address' ],
 352                         [ 'checkIndex', 'ipb_address_unique', [
 353                                 [ 'ipb_address', 'text_ops', 'btree', 0 ],
 354                                 [ 'ipb_user', 'int4_ops', 'btree', 0 ],
 355                                 [ 'ipb_auto', 'int2_ops', 'btree', 0 ],
 356                                 [ 'ipb_anon_only', 'int2_ops', 'btree', 0 ],
 357                         ],
 358                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 359                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ],
 360
 361                         [ 'checkIwlPrefix' ],
 362
 363                         # All FK columns should be deferred
 364                         [ 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 365                         [ 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ],
 366                         [ 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ],
 367                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 368                                 'mwuser(user_id) ON DELETE SET NULL' ],
 369                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 370                         [ 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 371                         [ 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ],
 372                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ],
 373                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 374                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 375                                 'ipblocks(ipb_id) ON DELETE SET NULL' ],
 376                         [ 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ],
 377                         [ 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 378                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 379                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ],
 380                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 381                         [ 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ],
 382                         [ 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ],
 383                         [ 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 384                                 'page(page_id) ON DELETE CASCADE' ],
 385                         [ 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 386                                 'mwuser(user_id) ON DELETE SET NULL' ],
 387                         [ 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 388                                 'mwuser(user_id) ON DELETE SET NULL' ],
 389                         [ 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ],
 390                         [ 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ],
 391                         [ 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ],
 392                         [ 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ],
 393                         [ 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 394                         [ 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ],
 395                         [ 'changeFkeyDeferrable', 'user_properties', 'up_user',
 396                                 'mwuser(user_id) ON DELETE CASCADE' ],
 397                         [ 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 398
 399                         # r81574
 400                         [ 'addInterwikiType' ],
 401                         # end
 402                         [ 'tsearchFixes' ],
 403
 404                         // 1.23
 405                         [ 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ],
 406                         [ 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ],
 407                         [ 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ],
 408                         [ 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 409                                 "replace(lc_value,'\','\\\\')::bytea" ],
 410                         // 1.23.9
 411                         [ 'rebuildTextSearch' ],
 412
 413                         // 1.24
 414                         [ 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ],
 415                         [ 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 416                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ],
 417                         [ 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ],
 418                         [ 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 419                         [ 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 420                         [ 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 421
 422                         // 1.25
 423                         [ 'dropTable', 'hitcounter' ],
 424                         [ 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ],
 425                         [ 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ],
 426                         [ 'dropFkey', 'recentchanges', 'rc_cur_id' ],
 427
 428                         // 1.27
 429                         [ 'dropTable', 'msg_resource_links' ],
 430                         [ 'dropTable', 'msg_resource' ],
 431                 ];
 432         }
 433
 434         protected function getOldGlobalUpdates() {
 435                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 436
 437                 $updates = [];
 438
 439                 # Add missing extension tables
 440                 foreach ( $wgExtNewTables as $tableRecord ) {
 441                         $updates[] = [
 442                                 'addTable', $tableRecord[0], $tableRecord[1], true
 443                         ];
 444                 }
 445
 446                 # Add missing extension fields
 447                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 448                         $updates[] = [
 449                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 450                                 $fieldRecord[2]
 451                         ];
 452                 }
 453
 454                 # Change altered columns
 455                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 456                         $updates[] = [
 457                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 458                                 $fieldRecord[2]
 459                         ];
 460                 }
 461
 462                 # Add missing extension indexes
 463                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 464                         $updates[] = [
 465                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 466                                 $fieldRecord[2]
 467                         ];
 468                 }
 469
 470                 return $updates;
 471         }
 472
 473         protected function describeTable( $table ) {
 474                 $q = <<<END
 475 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 476         WHERE pg_class.relnamespace = pg_namespace.oid
 477           AND attrelid=pg_class.oid AND attnum > 0
 478           AND relname=%s AND nspname=%s
 479 END;
 480                 $res = $this->db->query( sprintf( $q,
 481                         $this->db->addQuotes( $table ),
 482                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 483                 if ( !$res ) {
 484                         return null;
 485                 }
 486
 487                 $cols = [];
 488                 foreach ( $res as $r ) {
 489                         $cols[] = [
 490                                 "name" => $r[0],
 491                                 "ord" => $r[1],
 492                         ];
 493                 }
 494
 495                 return $cols;
 496         }
 497
 498         function describeIndex( $idx ) {
 499                 // first fetch the key (which is a list of columns ords) and
 500                 // the table the index applies to (an oid)
 501                 $q = <<<END
 502 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 503         WHERE nspname=%s
 504           AND pg_class.relnamespace = pg_namespace.oid
 505           AND relname=%s
 506           AND indexrelid=pg_class.oid
 507 END;
 508                 $res = $this->db->query(
 509                         sprintf(
 510                                 $q,
 511                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 512                                 $this->db->addQuotes( $idx )
 513                         )
 514                 );
 515                 if ( !$res ) {
 516                         return null;
 517                 }
 518                 $r = $this->db->fetchRow( $res );
 519                 if ( !$r ) {
 520                         return null;
 521                 }
 522
 523                 $indkey = $r[0];
 524                 $relid = intval( $r[1] );
 525                 $indkeys = explode( ' ', $indkey );
 526
 527                 $colnames = [];
 528                 foreach ( $indkeys as $rid ) {
 529                         $query = <<<END
 530 SELECT attname FROM pg_class, pg_attribute
 531         WHERE attrelid=$relid
 532           AND attnum=%d
 533           AND attrelid=pg_class.oid
 534 END;
 535                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 536                         if ( !$r2 ) {
 537                                 return null;
 538                         }
 539                         $row2 = $this->db->fetchRow( $r2 );
 540                         if ( !$row2 ) {
 541                                 return null;
 542                         }
 543                         $colnames[] = $row2[0];
 544                 }
 545
 546                 return $colnames;
 547         }
 548
 549         function fkeyDeltype( $fkey ) {
 550                 $q = <<<END
 551 SELECT confdeltype FROM pg_constraint, pg_namespace
 552         WHERE connamespace=pg_namespace.oid
 553           AND nspname=%s
 554           AND conname=%s;
 555 END;
 556                 $r = $this->db->query(
 557                         sprintf(
 558                                 $q,
 559                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 560                                 $this->db->addQuotes( $fkey )
 561                         )
 562                 );
 563                 $row = $this->db->fetchRow( $r );
 564                 if ( !$row ) {
 565                         return null;
 566                 }
 567
 568                 return $row[0];
 569         }
 570
 571         function ruleDef( $table, $rule ) {
 572                 $q = <<<END
 573 SELECT definition FROM pg_rules
 574         WHERE schemaname = %s
 575           AND tablename = %s
 576           AND rulename = %s
 577 END;
 578                 $r = $this->db->query(
 579                         sprintf(
 580                                 $q,
 581                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 582                                 $this->db->addQuotes( $table ),
 583                                 $this->db->addQuotes( $rule )
 584                         )
 585                 );
 586                 $row = $this->db->fetchRow( $r );
 587                 if ( !$row ) {
 588                         return null;
 589                 }
 590                 $d = $row[0];
 591
 592                 return $d;
 593         }
 594
 595         protected function addSequence( $table, $pkey, $ns ) {
 596                 if ( !$this->db->sequenceExists( $ns ) ) {
 597                         $this->output( "Creating sequence $ns\n" );
 598                         $this->db->query( "CREATE SEQUENCE $ns" );
 599                         if ( $pkey !== false ) {
 600                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 601                         }
 602                 }
 603         }
 604
 605         protected function renameSequence( $old, $new ) {
 606                 if ( $this->db->sequenceExists( $new ) ) {
 607                         $this->output( "...sequence $new already exists.\n" );
 608
 609                         return;
 610                 }
 611                 if ( $this->db->sequenceExists( $old ) ) {
 612                         $this->output( "Renaming sequence $old to $new\n" );
 613                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 614                 }
 615         }
 616
 617         protected function renameTable( $old, $new, $patch = false ) {
 618                 if ( $this->db->tableExists( $old ) ) {
 619                         $this->output( "Renaming table $old to $new\n" );
 620                         $old = $this->db->realTableName( $old, "quoted" );
 621                         $new = $this->db->realTableName( $new, "quoted" );
 622                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 623                         if ( $patch !== false ) {
 624                                 $this->applyPatch( $patch );
 625                         }
 626                 }
 627         }
 628
 629         protected function renameIndex(
 630                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 631         ) {
 632                 // First requirement: the table must exist
 633                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 634                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 635
 636                         return;
 637                 }
 638
 639                 // Second requirement: the new index must be missing
 640                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 641                         $this->output( "...index $new already set on $table table.\n" );
 642                         if ( !$skipBothIndexExistWarning
 643                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 644                         ) {
 645                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 646                                         "renamed into $new (which also exists).\n" .
 647                                         "            $old should be manually removed if not needed anymore.\n" );
 648                         }
 649
 650                         return;
 651                 }
 652
 653                 // Third requirement: the old index must exist
 654                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 655                         $this->output( "...skipping: index $old doesn't exist.\n" );
 656
 657                         return;
 658                 }
 659
 660                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 661         }
 662
 663         protected function addPgField( $table, $field, $type ) {
 664                 $fi = $this->db->fieldInfo( $table, $field );
 665                 if ( !is_null( $fi ) ) {
 666                         $this->output( "...column '$table.$field' already exists\n" );
 667
 668                         return;
 669                 } else {
 670                         $this->output( "Adding column '$table.$field'\n" );
 671                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 672                 }
 673         }
 674
 675         protected function changeField( $table, $field, $newtype, $default ) {
 676                 $fi = $this->db->fieldInfo( $table, $field );
 677                 if ( is_null( $fi ) ) {
 678                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 679                         exit( 1 );
 680                 }
 681
 682                 if ( $fi->type() === $newtype ) {
 683                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 684                 } else {
 685                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 686                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 687                         if ( strlen( $default ) ) {
 688                                 $res = [];
 689                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 690                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 691                                         $this->db->query( $sqldef );
 692                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 693                                 }
 694                                 $sql .= " USING $default";
 695                         }
 696                         $this->db->query( $sql );
 697                 }
 698         }
 699
 700         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 701                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 702                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 703                 $fi = $this->db->fieldInfo( $table, $field );
 704                 if ( is_null( $fi ) ) {
 705                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 706                         exit( 1 );
 707                 }
 708
 709                 if ( $fi->type() === $newtype ) {
 710                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 711                 } else {
 712                         $this->output( "Purging data from cache table '$table'\n" );
 713                         $this->db->query( "DELETE from $table" );
 714                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 715                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 716                         if ( strlen( $default ) ) {
 717                                 $res = [];
 718                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 719                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 720                                         $this->db->query( $sqldef );
 721                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 722                                 }
 723                                 $sql .= " USING $default";
 724                         }
 725                         $this->db->query( $sql );
 726                 }
 727         }
 728
 729         protected function setDefault( $table, $field, $default ) {
 730
 731                 $info = $this->db->fieldInfo( $table, $field );
 732                 if ( $info->defaultValue() !== $default ) {
 733                         $this->output( "Changing '$table.$field' default value\n" );
 734                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 735                 }
 736         }
 737
 738         protected function changeNullableField( $table, $field, $null ) {
 739                 $fi = $this->db->fieldInfo( $table, $field );
 740                 if ( is_null( $fi ) ) {
 741                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 742                         exit( 1 );
 743                 }
 744                 if ( $fi->isNullable() ) {
 745                         # # It's NULL - does it need to be NOT NULL?
 746                         if ( 'NOT NULL' === $null ) {
 747                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 748                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 749                         } else {
 750                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 751                         }
 752                 } else {
 753                         # # It's NOT NULL - does it need to be NULL?
 754                         if ( 'NULL' === $null ) {
 755                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 756                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 757                         } else {
 758                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 759                         }
 760                 }
 761         }
 762
 763         public function addPgIndex( $table, $index, $type ) {
 764                 if ( $this->db->indexExists( $table, $index ) ) {
 765                         $this->output( "...index '$index' on table '$table' already exists\n" );
 766                 } else {
 767                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 768                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 769                 }
 770         }
 771
 772         public function addPgExtIndex( $table, $index, $type ) {
 773                 if ( $this->db->indexExists( $table, $index ) ) {
 774                         $this->output( "...index '$index' on table '$table' already exists\n" );
 775                 } else {
 776                         if ( preg_match( '/^\(/', $type ) ) {
 777                                 $this->output( "Creating index '$index' on table '$table'\n" );
 778                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 779                         } else {
 780                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 781                         }
 782                 }
 783         }
 784
 785         protected function dropFkey( $table, $field ) {
 786                 $fi = $this->db->fieldInfo( $table, $field );
 787                 if ( is_null( $fi ) ) {
 788                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 789                                 "Please report this.\n" );
 790                         return;
 791                 }
 792                 $conname = $fi->conname();
 793                 if ( $fi->conname() ) {
 794                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
 795                         $conclause = "CONSTRAINT \"$conname\"";
 796                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 797                         $this->db->query( $command );
 798                 } else {
 799                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
 800                 };
 801         }
 802
 803         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 804                 $fi = $this->db->fieldInfo( $table, $field );
 805                 if ( is_null( $fi ) ) {
 806                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 807                                 "Please report this.\n" );
 808
 809                         return;
 810                 }
 811                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 812                         return;
 813                 }
 814                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 815                 $conname = $fi->conname();
 816                 if ( $fi->conname() ) {
 817                         $conclause = "CONSTRAINT \"$conname\"";
 818                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 819                         $this->db->query( $command );
 820                 } else {
 821                         $this->output( "Column '$table.$field' does not have a foreign key " .
 822                                 "constraint, will be added\n" );
 823                         $conclause = "";
 824                 }
 825                 $command =
 826                         "ALTER TABLE $table ADD $conclause " .
 827                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 828                 $this->db->query( $command );
 829         }
 830
 831         protected function convertArchive2() {
 832                 if ( $this->db->tableExists( "archive2" ) ) {
 833                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 834                                 $this->output( "Dropping rule 'archive_insert'\n" );
 835                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 836                         }
 837                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 838                                 $this->output( "Dropping rule 'archive_delete'\n" );
 839                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 840                         }
 841                         $this->applyPatch(
 842                                 'patch-remove-archive2.sql',
 843                                 false,
 844                                 "Converting 'archive2' back to normal archive table"
 845                         );
 846                 } else {
 847                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 848                 }
 849         }
 850
 851         protected function checkOiDeleted() {
 852                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 853                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 854                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 855                         $this->db->query(
 856                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 857                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 858                 } else {
 859                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 860                 }
 861         }
 862
 863         protected function checkOiNameConstraint() {
 864                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 865                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 866                                 "foreign key to image\n" );
 867                 } else {
 868                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 869                                 $this->db->query(
 870                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 871                         }
 872                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 873                                 $this->db->query(
 874                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 875                         }
 876                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 877                         $this->db->query(
 878                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 879                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 880                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 881                 }
 882         }
 883
 884         protected function checkPageDeletedTrigger() {
 885                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 886                         $this->applyPatch(
 887                                 'patch-page_deleted.sql',
 888                                 false,
 889                                 "Adding function and trigger 'page_deleted' to table 'page'"
 890                         );
 891                 } else {
 892                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 893                 }
 894         }
 895
 896         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 897                 if ( $this->db->indexExists( $table, $index ) ) {
 898                         $this->output( "Dropping obsolete index '$index'\n" );
 899                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 900                 }
 901         }
 902
 903         protected function checkIndex( $index, $should_be, $good_def ) {
 904                 $pu = $this->db->indexAttributes( $index );
 905                 if ( !empty( $pu ) && $pu != $should_be ) {
 906                         $this->output( "Dropping obsolete version of index '$index'\n" );
 907                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 908                         $pu = [];
 909                 } else {
 910                         $this->output( "...no need to drop index '$index'\n" );
 911                 }
 912
 913                 if ( empty( $pu ) ) {
 914                         $this->output( "Creating index '$index'\n" );
 915                         $this->db->query( $good_def );
 916                 } else {
 917                         $this->output( "...index '$index' exists\n" );
 918                 }
 919         }
 920
 921         protected function checkRevUserFkey() {
 922                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 923                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 924                 } else {
 925                         $this->applyPatch(
 926                                 'patch-revision_rev_user_fkey.sql',
 927                                 false,
 928                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 929                         );
 930                 }
 931         }
 932
 933         protected function checkIwlPrefix() {
 934                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 935                         $this->applyPatch(
 936                                 'patch-rename-iwl_prefix.sql',
 937                                 false,
 938                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 939                         );
 940                 }
 941         }
 942
 943         protected function addInterwikiType() {
 944                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 945         }
 946
 947         protected function tsearchFixes() {
 948                 # Tweak the page_title tsearch2 trigger to filter out slashes
 949                 # This is create or replace, so harmless to call if not needed
 950                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 951
 952                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 953                 # in case they have the old 'default' versions
 954                 # Gather version numbers in case we need them
 955                 if ( $this->db->getServerVersion() >= 8.3 ) {
 956                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 957                 }
 958         }
 959
 960         protected function rebuildTextSearch() {
 961                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
 962                         $this->output( "...bug 66650 already fixed or not applicable.\n" );
 963                         return true;
 964                 };
 965                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
 966                         'Rebuilding text search for bug 66650' );
 967         }
 968 }