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         }
 457
 458         protected function getOldGlobalUpdates() {
 459                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 460
 461                 $updates = [];
 462
 463                 # Add missing extension tables
 464                 foreach ( $wgExtNewTables as $tableRecord ) {
 465                         $updates[] = [
 466                                 'addTable', $tableRecord[0], $tableRecord[1], true
 467                         ];
 468                 }
 469
 470                 # Add missing extension fields
 471                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 472                         $updates[] = [
 473                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 474                                 $fieldRecord[2]
 475                         ];
 476                 }
 477
 478                 # Change altered columns
 479                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 480                         $updates[] = [
 481                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 482                                 $fieldRecord[2]
 483                         ];
 484                 }
 485
 486                 # Add missing extension indexes
 487                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 488                         $updates[] = [
 489                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 490                                 $fieldRecord[2]
 491                         ];
 492                 }
 493
 494                 return $updates;
 495         }
 496
 497         protected function describeTable( $table ) {
 498                 $q = <<<END
 499 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 500         WHERE pg_class.relnamespace = pg_namespace.oid
 501                 AND attrelid=pg_class.oid AND attnum > 0
 502                 AND relname=%s AND nspname=%s
 503 END;
 504                 $res = $this->db->query( sprintf( $q,
 505                         $this->db->addQuotes( $table ),
 506                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 507                 if ( !$res ) {
 508                         return null;
 509                 }
 510
 511                 $cols = [];
 512                 foreach ( $res as $r ) {
 513                         $cols[] = [
 514                                 "name" => $r[0],
 515                                 "ord" => $r[1],
 516                         ];
 517                 }
 518
 519                 return $cols;
 520         }
 521
 522         function describeIndex( $idx ) {
 523                 // first fetch the key (which is a list of columns ords) and
 524                 // the table the index applies to (an oid)
 525                 $q = <<<END
 526 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 527         WHERE nspname=%s
 528                 AND pg_class.relnamespace = pg_namespace.oid
 529                 AND relname=%s
 530                 AND indexrelid=pg_class.oid
 531 END;
 532                 $res = $this->db->query(
 533                         sprintf(
 534                                 $q,
 535                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 536                                 $this->db->addQuotes( $idx )
 537                         )
 538                 );
 539                 if ( !$res ) {
 540                         return null;
 541                 }
 542                 $r = $this->db->fetchRow( $res );
 543                 if ( !$r ) {
 544                         return null;
 545                 }
 546
 547                 $indkey = $r[0];
 548                 $relid = intval( $r[1] );
 549                 $indkeys = explode( ' ', $indkey );
 550
 551                 $colnames = [];
 552                 foreach ( $indkeys as $rid ) {
 553                         $query = <<<END
 554 SELECT attname FROM pg_class, pg_attribute
 555         WHERE attrelid=$relid
 556                 AND attnum=%d
 557                 AND attrelid=pg_class.oid
 558 END;
 559                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 560                         if ( !$r2 ) {
 561                                 return null;
 562                         }
 563                         $row2 = $this->db->fetchRow( $r2 );
 564                         if ( !$row2 ) {
 565                                 return null;
 566                         }
 567                         $colnames[] = $row2[0];
 568                 }
 569
 570                 return $colnames;
 571         }
 572
 573         function fkeyDeltype( $fkey ) {
 574                 $q = <<<END
 575 SELECT confdeltype FROM pg_constraint, pg_namespace
 576         WHERE connamespace=pg_namespace.oid
 577                 AND nspname=%s
 578                 AND conname=%s;
 579 END;
 580                 $r = $this->db->query(
 581                         sprintf(
 582                                 $q,
 583                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 584                                 $this->db->addQuotes( $fkey )
 585                         )
 586                 );
 587                 $row = $this->db->fetchRow( $r );
 588                 if ( !$row ) {
 589                         return null;
 590                 }
 591
 592                 return $row[0];
 593         }
 594
 595         function ruleDef( $table, $rule ) {
 596                 $q = <<<END
 597 SELECT definition FROM pg_rules
 598         WHERE schemaname = %s
 599                 AND tablename = %s
 600                 AND rulename = %s
 601 END;
 602                 $r = $this->db->query(
 603                         sprintf(
 604                                 $q,
 605                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 606                                 $this->db->addQuotes( $table ),
 607                                 $this->db->addQuotes( $rule )
 608                         )
 609                 );
 610                 $row = $this->db->fetchRow( $r );
 611                 if ( !$row ) {
 612                         return null;
 613                 }
 614                 $d = $row[0];
 615
 616                 return $d;
 617         }
 618
 619         protected function addSequence( $table, $pkey, $ns ) {
 620                 if ( !$this->db->sequenceExists( $ns ) ) {
 621                         $this->output( "Creating sequence $ns\n" );
 622                         $this->db->query( "CREATE SEQUENCE $ns" );
 623                         if ( $pkey !== false ) {
 624                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 625                         }
 626                 }
 627         }
 628
 629         protected function renameSequence( $old, $new ) {
 630                 if ( $this->db->sequenceExists( $new ) ) {
 631                         $this->output( "...sequence $new already exists.\n" );
 632
 633                         return;
 634                 }
 635                 if ( $this->db->sequenceExists( $old ) ) {
 636                         $this->output( "Renaming sequence $old to $new\n" );
 637                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 638                 }
 639         }
 640
 641         protected function renameTable( $old, $new, $patch = false ) {
 642                 if ( $this->db->tableExists( $old ) ) {
 643                         $this->output( "Renaming table $old to $new\n" );
 644                         $old = $this->db->realTableName( $old, "quoted" );
 645                         $new = $this->db->realTableName( $new, "quoted" );
 646                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 647                         if ( $patch !== false ) {
 648                                 $this->applyPatch( $patch );
 649                         }
 650                 }
 651         }
 652
 653         protected function renameIndex(
 654                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 655         ) {
 656                 // First requirement: the table must exist
 657                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 658                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 659
 660                         return;
 661                 }
 662
 663                 // Second requirement: the new index must be missing
 664                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 665                         $this->output( "...index $new already set on $table table.\n" );
 666                         if ( !$skipBothIndexExistWarning
 667                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 668                         ) {
 669                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 670                                         "renamed into $new (which also exists).\n" .
 671                                         "            $old should be manually removed if not needed anymore.\n" );
 672                         }
 673
 674                         return;
 675                 }
 676
 677                 // Third requirement: the old index must exist
 678                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 679                         $this->output( "...skipping: index $old doesn't exist.\n" );
 680
 681                         return;
 682                 }
 683
 684                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 685         }
 686
 687         protected function addPgField( $table, $field, $type ) {
 688                 $fi = $this->db->fieldInfo( $table, $field );
 689                 if ( !is_null( $fi ) ) {
 690                         $this->output( "...column '$table.$field' already exists\n" );
 691
 692                         return;
 693                 } else {
 694                         $this->output( "Adding column '$table.$field'\n" );
 695                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 696                 }
 697         }
 698
 699         protected function changeField( $table, $field, $newtype, $default ) {
 700                 $fi = $this->db->fieldInfo( $table, $field );
 701                 if ( is_null( $fi ) ) {
 702                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 703                         exit( 1 );
 704                 }
 705
 706                 if ( $fi->type() === $newtype ) {
 707                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 708                 } else {
 709                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 710                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 711                         if ( strlen( $default ) ) {
 712                                 $res = [];
 713                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 714                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 715                                         $this->db->query( $sqldef );
 716                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 717                                 }
 718                                 $sql .= " USING $default";
 719                         }
 720                         $this->db->query( $sql );
 721                 }
 722         }
 723
 724         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 725                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 726                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 727                 $fi = $this->db->fieldInfo( $table, $field );
 728                 if ( is_null( $fi ) ) {
 729                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 730                         exit( 1 );
 731                 }
 732
 733                 if ( $fi->type() === $newtype ) {
 734                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 735                 } else {
 736                         $this->output( "Purging data from cache table '$table'\n" );
 737                         $this->db->query( "DELETE from $table" );
 738                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 739                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 740                         if ( strlen( $default ) ) {
 741                                 $res = [];
 742                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 743                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 744                                         $this->db->query( $sqldef );
 745                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 746                                 }
 747                                 $sql .= " USING $default";
 748                         }
 749                         $this->db->query( $sql );
 750                 }
 751         }
 752
 753         protected function setDefault( $table, $field, $default ) {
 754                 $info = $this->db->fieldInfo( $table, $field );
 755                 if ( $info->defaultValue() !== $default ) {
 756                         $this->output( "Changing '$table.$field' default value\n" );
 757                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 758                 }
 759         }
 760
 761         protected function changeNullableField( $table, $field, $null ) {
 762                 $fi = $this->db->fieldInfo( $table, $field );
 763                 if ( is_null( $fi ) ) {
 764                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 765                         exit( 1 );
 766                 }
 767                 if ( $fi->isNullable() ) {
 768                         # # It's NULL - does it need to be NOT NULL?
 769                         if ( 'NOT NULL' === $null ) {
 770                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 771                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 772                         } else {
 773                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 774                         }
 775                 } else {
 776                         # # It's NOT NULL - does it need to be NULL?
 777                         if ( 'NULL' === $null ) {
 778                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 779                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 780                         } else {
 781                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 782                         }
 783                 }
 784         }
 785
 786         public function addPgIndex( $table, $index, $type ) {
 787                 if ( $this->db->indexExists( $table, $index ) ) {
 788                         $this->output( "...index '$index' on table '$table' already exists\n" );
 789                 } else {
 790                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 791                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 792                 }
 793         }
 794
 795         public function addPgExtIndex( $table, $index, $type ) {
 796                 if ( $this->db->indexExists( $table, $index ) ) {
 797                         $this->output( "...index '$index' on table '$table' already exists\n" );
 798                 } else {
 799                         if ( preg_match( '/^\(/', $type ) ) {
 800                                 $this->output( "Creating index '$index' on table '$table'\n" );
 801                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 802                         } else {
 803                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 804                         }
 805                 }
 806         }
 807
 808         protected function dropFkey( $table, $field ) {
 809                 $fi = $this->db->fieldInfo( $table, $field );
 810                 if ( is_null( $fi ) ) {
 811                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 812                                 "Please report this.\n" );
 813                         return;
 814                 }
 815                 $conname = $fi->conname();
 816                 if ( $fi->conname() ) {
 817                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
 818                         $conclause = "CONSTRAINT \"$conname\"";
 819                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 820                         $this->db->query( $command );
 821                 } else {
 822                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
 823                 };
 824         }
 825
 826         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 827                 $fi = $this->db->fieldInfo( $table, $field );
 828                 if ( is_null( $fi ) ) {
 829                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 830                                 "Please report this.\n" );
 831
 832                         return;
 833                 }
 834                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 835                         return;
 836                 }
 837                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 838                 $conname = $fi->conname();
 839                 if ( $fi->conname() ) {
 840                         $conclause = "CONSTRAINT \"$conname\"";
 841                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 842                         $this->db->query( $command );
 843                 } else {
 844                         $this->output( "Column '$table.$field' does not have a foreign key " .
 845                                 "constraint, will be added\n" );
 846                         $conclause = "";
 847                 }
 848                 $command =
 849                         "ALTER TABLE $table ADD $conclause " .
 850                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 851                 $this->db->query( $command );
 852         }
 853
 854         protected function convertArchive2() {
 855                 if ( $this->db->tableExists( "archive2" ) ) {
 856                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 857                                 $this->output( "Dropping rule 'archive_insert'\n" );
 858                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 859                         }
 860                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 861                                 $this->output( "Dropping rule 'archive_delete'\n" );
 862                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 863                         }
 864                         $this->applyPatch(
 865                                 'patch-remove-archive2.sql',
 866                                 false,
 867                                 "Converting 'archive2' back to normal archive table"
 868                         );
 869                 } else {
 870                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 871                 }
 872         }
 873
 874         protected function checkOiDeleted() {
 875                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 876                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 877                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 878                         $this->db->query(
 879                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 880                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 881                 } else {
 882                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 883                 }
 884         }
 885
 886         protected function checkOiNameConstraint() {
 887                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 888                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 889                                 "foreign key to image\n" );
 890                 } else {
 891                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 892                                 $this->db->query(
 893                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 894                         }
 895                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 896                                 $this->db->query(
 897                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 898                         }
 899                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 900                         $this->db->query(
 901                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 902                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 903                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 904                 }
 905         }
 906
 907         protected function checkPageDeletedTrigger() {
 908                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 909                         $this->applyPatch(
 910                                 'patch-page_deleted.sql',
 911                                 false,
 912                                 "Adding function and trigger 'page_deleted' to table 'page'"
 913                         );
 914                 } else {
 915                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 916                 }
 917         }
 918
 919         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 920                 if ( $this->db->indexExists( $table, $index ) ) {
 921                         $this->output( "Dropping obsolete index '$index'\n" );
 922                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 923                 }
 924         }
 925
 926         protected function checkIndex( $index, $should_be, $good_def ) {
 927                 $pu = $this->db->indexAttributes( $index );
 928                 if ( !empty( $pu ) && $pu != $should_be ) {
 929                         $this->output( "Dropping obsolete version of index '$index'\n" );
 930                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 931                         $pu = [];
 932                 } else {
 933                         $this->output( "...no need to drop index '$index'\n" );
 934                 }
 935
 936                 if ( empty( $pu ) ) {
 937                         $this->output( "Creating index '$index'\n" );
 938                         $this->db->query( $good_def );
 939                 } else {
 940                         $this->output( "...index '$index' exists\n" );
 941                 }
 942         }
 943
 944         protected function checkRevUserFkey() {
 945                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 946                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 947                 } else {
 948                         $this->applyPatch(
 949                                 'patch-revision_rev_user_fkey.sql',
 950                                 false,
 951                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 952                         );
 953                 }
 954         }
 955
 956         protected function checkIwlPrefix() {
 957                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 958                         $this->applyPatch(
 959                                 'patch-rename-iwl_prefix.sql',
 960                                 false,
 961                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 962                         );
 963                 }
 964         }
 965
 966         protected function addInterwikiType() {
 967                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 968         }
 969
 970         protected function tsearchFixes() {
 971                 # Tweak the page_title tsearch2 trigger to filter out slashes
 972                 # This is create or replace, so harmless to call if not needed
 973                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 974
 975                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 976                 # in case they have the old 'default' versions
 977                 # Gather version numbers in case we need them
 978                 if ( $this->db->getServerVersion() >= 8.3 ) {
 979                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 980                 }
 981         }
 982
 983         protected function rebuildTextSearch() {
 984                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
 985                         $this->output( "...T68650 already fixed or not applicable.\n" );
 986                         return;
 987                 };
 988                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
 989                         'Rebuilding text search for T68650' );
 990         }
 991 }