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                         [ 'addSequence', 'watchlist', false, 'watchlist_wl_id_seq' ],
  71                         [ 'addSequence', 'change_tag', false, 'change_tag_ct_id_seq' ],
  72                         [ 'addSequence', 'tag_summary', false, 'tag_summary_ts_id_seq' ],
  73
  74                         # new tables
  75                         [ 'addTable', 'category', 'patch-category.sql' ],
  76                         [ 'addTable', 'page', 'patch-page.sql' ],
  77                         [ 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ],
  78                         [ 'addTable', 'page_props', 'patch-page_props.sql' ],
  79                         [ 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ],
  80                         [ 'addTable', 'profiling', 'patch-profiling.sql' ],
  81                         [ 'addTable', 'protected_titles', 'patch-protected_titles.sql' ],
  82                         [ 'addTable', 'redirect', 'patch-redirect.sql' ],
  83                         [ 'addTable', 'updatelog', 'patch-updatelog.sql' ],
  84                         [ 'addTable', 'change_tag', 'patch-change_tag.sql' ],
  85                         [ 'addTable', 'tag_summary', 'patch-tag_summary.sql' ],
  86                         [ 'addTable', 'valid_tag', 'patch-valid_tag.sql' ],
  87                         [ 'addTable', 'user_properties', 'patch-user_properties.sql' ],
  88                         [ 'addTable', 'log_search', 'patch-log_search.sql' ],
  89                         [ 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ],
  90                         [ 'addTable', 'iwlinks', 'patch-iwlinks.sql' ],
  91                         [ 'addTable', 'module_deps', 'patch-module_deps.sql' ],
  92                         [ 'addTable', 'uploadstash', 'patch-uploadstash.sql' ],
  93                         [ 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ],
  94                         [ 'addTable', 'sites', 'patch-sites.sql' ],
  95                         [ 'addTable', 'bot_passwords', 'patch-bot_passwords.sql' ],
  96
  97                         # Needed before new field
  98                         [ 'convertArchive2' ],
  99
 100                         # new fields
 101                         [ 'addPgField', 'updatelog', 'ul_value', 'TEXT' ],
 102                         [ 'addPgField', 'archive', 'ar_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 103                         [ 'addPgField', 'archive', 'ar_len', 'INTEGER' ],
 104                         [ 'addPgField', 'archive', 'ar_page_id', 'INTEGER' ],
 105                         [ 'addPgField', 'archive', 'ar_parent_id', 'INTEGER' ],
 106                         [ 'addPgField', 'archive', 'ar_content_model', 'TEXT' ],
 107                         [ 'addPgField', 'archive', 'ar_content_format', 'TEXT' ],
 108                         [ 'addPgField', 'categorylinks', 'cl_sortkey_prefix', "TEXT NOT NULL DEFAULT ''" ],
 109                         [ 'addPgField', 'categorylinks', 'cl_collation', "TEXT NOT NULL DEFAULT 0" ],
 110                         [ 'addPgField', 'categorylinks', 'cl_type', "TEXT NOT NULL DEFAULT 'page'" ],
 111                         [ 'addPgField', 'image', 'img_sha1', "TEXT NOT NULL DEFAULT ''" ],
 112                         [ 'addPgField', 'ipblocks', 'ipb_allow_usertalk', 'SMALLINT NOT NULL DEFAULT 0' ],
 113                         [ 'addPgField', 'ipblocks', 'ipb_anon_only', 'SMALLINT NOT NULL DEFAULT 0' ],
 114                         [ 'addPgField', 'ipblocks', 'ipb_by_text', "TEXT NOT NULL DEFAULT ''" ],
 115                         [ 'addPgField', 'ipblocks', 'ipb_block_email', 'SMALLINT NOT NULL DEFAULT 0' ],
 116                         [ 'addPgField', 'ipblocks', 'ipb_create_account', 'SMALLINT NOT NULL DEFAULT 1' ],
 117                         [ 'addPgField', 'ipblocks', 'ipb_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 118                         [ 'addPgField', 'ipblocks', 'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ],
 119                         [ 'addPgField', 'ipblocks', 'ipb_parent_block_id',
 120                                 'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ' .
 121                                 'ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ],
 122                         [ 'addPgField', 'filearchive', 'fa_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 123                         [ 'addPgField', 'filearchive', 'fa_sha1', "TEXT NOT NULL DEFAULT ''" ],
 124                         [ 'addPgField', 'logging', 'log_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 125                         [ 'addPgField', 'logging', 'log_id',
 126                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ],
 127                         [ 'addPgField', 'logging', 'log_params', 'TEXT' ],
 128                         [ 'addPgField', 'mwuser', 'user_editcount', 'INTEGER' ],
 129                         [ 'addPgField', 'mwuser', 'user_newpass_time', 'TIMESTAMPTZ' ],
 130                         [ 'addPgField', 'oldimage', 'oi_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 131                         [ 'addPgField', 'oldimage', 'oi_major_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 132                         [ 'addPgField', 'oldimage', 'oi_media_type', 'TEXT' ],
 133                         [ 'addPgField', 'oldimage', 'oi_metadata', "BYTEA NOT NULL DEFAULT ''" ],
 134                         [ 'addPgField', 'oldimage', 'oi_minor_mime', "TEXT NOT NULL DEFAULT 'unknown'" ],
 135                         [ 'addPgField', 'oldimage', 'oi_sha1', "TEXT NOT NULL DEFAULT ''" ],
 136                         [ 'addPgField', 'page', 'page_content_model', 'TEXT' ],
 137                         [ 'addPgField', 'page_restrictions', 'pr_id',
 138                                 "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ],
 139                         [ 'addPgField', 'profiling', 'pf_memory', 'NUMERIC(18,10) NOT NULL DEFAULT 0' ],
 140                         [ 'addPgField', 'recentchanges', 'rc_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 141                         [ 'addPgField', 'recentchanges', 'rc_log_action', 'TEXT' ],
 142                         [ 'addPgField', 'recentchanges', 'rc_log_type', 'TEXT' ],
 143                         [ 'addPgField', 'recentchanges', 'rc_logid', 'INTEGER NOT NULL DEFAULT 0' ],
 144                         [ 'addPgField', 'recentchanges', 'rc_new_len', 'INTEGER' ],
 145                         [ 'addPgField', 'recentchanges', 'rc_old_len', 'INTEGER' ],
 146                         [ 'addPgField', 'recentchanges', 'rc_params', 'TEXT' ],
 147                         [ 'addPgField', 'redirect', 'rd_interwiki', 'TEXT NULL' ],
 148                         [ 'addPgField', 'redirect', 'rd_fragment', 'TEXT NULL' ],
 149                         [ 'addPgField', 'revision', 'rev_deleted', 'SMALLINT NOT NULL DEFAULT 0' ],
 150                         [ 'addPgField', 'revision', 'rev_len', 'INTEGER' ],
 151                         [ 'addPgField', 'revision', 'rev_parent_id', 'INTEGER DEFAULT NULL' ],
 152                         [ 'addPgField', 'revision', 'rev_content_model', 'TEXT' ],
 153                         [ 'addPgField', 'revision', 'rev_content_format', 'TEXT' ],
 154                         [ 'addPgField', 'site_stats', 'ss_active_users', "INTEGER DEFAULT '-1'" ],
 155                         [ 'addPgField', 'user_newtalk', 'user_last_timestamp', 'TIMESTAMPTZ' ],
 156                         [ 'addPgField', 'logging', 'log_user_text', "TEXT NOT NULL DEFAULT ''" ],
 157                         [ 'addPgField', 'logging', 'log_page', 'INTEGER' ],
 158                         [ 'addPgField', 'interwiki', 'iw_api', "TEXT NOT NULL DEFAULT ''" ],
 159                         [ 'addPgField', 'interwiki', 'iw_wikiid', "TEXT NOT NULL DEFAULT ''" ],
 160                         [ 'addPgField', 'revision', 'rev_sha1', "TEXT NOT NULL DEFAULT ''" ],
 161                         [ 'addPgField', 'archive', 'ar_sha1', "TEXT NOT NULL DEFAULT ''" ],
 162                         [ 'addPgField', 'uploadstash', 'us_chunk_inx', "INTEGER NULL" ],
 163                         [ 'addPgField', 'job', 'job_timestamp', "TIMESTAMPTZ" ],
 164                         [ 'addPgField', 'job', 'job_random', "INTEGER NOT NULL DEFAULT 0" ],
 165                         [ 'addPgField', 'job', 'job_attempts', "INTEGER NOT NULL DEFAULT 0" ],
 166                         [ 'addPgField', 'job', 'job_token', "TEXT NOT NULL DEFAULT ''" ],
 167                         [ 'addPgField', 'job', 'job_token_timestamp', "TIMESTAMPTZ" ],
 168                         [ 'addPgField', 'job', 'job_sha1', "TEXT NOT NULL DEFAULT ''" ],
 169                         [ 'addPgField', 'archive', 'ar_id',
 170                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('archive_ar_id_seq')" ],
 171                         [ 'addPgField', 'externallinks', 'el_id',
 172                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('externallinks_el_id_seq')" ],
 173                         [ 'addPgField', 'uploadstash', 'us_props', "BYTEA" ],
 174
 175                         # type changes
 176                         [ 'changeField', 'archive', 'ar_deleted', 'smallint', '' ],
 177                         [ 'changeField', 'archive', 'ar_minor_edit', 'smallint',
 178                                 'ar_minor_edit::smallint DEFAULT 0' ],
 179                         [ 'changeField', 'filearchive', 'fa_deleted', 'smallint', '' ],
 180                         [ 'changeField', 'filearchive', 'fa_height', 'integer', '' ],
 181                         [ 'changeField', 'filearchive', 'fa_metadata', 'bytea', "decode(fa_metadata,'escape')" ],
 182                         [ 'changeField', 'filearchive', 'fa_size', 'integer', '' ],
 183                         [ 'changeField', 'filearchive', 'fa_width', 'integer', '' ],
 184                         [ 'changeField', 'filearchive', 'fa_storage_group', 'text', '' ],
 185                         [ 'changeField', 'filearchive', 'fa_storage_key', 'text', '' ],
 186                         [ 'changeField', 'image', 'img_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 187                         [ 'changeField', 'image', 'img_size', 'integer', '' ],
 188                         [ 'changeField', 'image', 'img_width', 'integer', '' ],
 189                         [ 'changeField', 'image', 'img_height', 'integer', '' ],
 190                         [ 'changeField', 'interwiki', 'iw_local', 'smallint', 'iw_local::smallint' ],
 191                         [ 'changeField', 'interwiki', 'iw_trans', 'smallint', 'iw_trans::smallint DEFAULT 0' ],
 192                         [ 'changeField', 'ipblocks', 'ipb_auto', 'smallint', 'ipb_auto::smallint DEFAULT 0' ],
 193                         [ 'changeField', 'ipblocks', 'ipb_anon_only', 'smallint',
 194                                 "CASE WHEN ipb_anon_only=' ' THEN 0 ELSE ipb_anon_only::smallint END DEFAULT 0" ],
 195                         [ 'changeField', 'ipblocks', 'ipb_create_account', 'smallint',
 196                                 "CASE WHEN ipb_create_account=' ' THEN 0 ELSE ipb_create_account::smallint END DEFAULT 1" ],
 197                         [ 'changeField', 'ipblocks', 'ipb_enable_autoblock', 'smallint',
 198                                 "CASE WHEN ipb_enable_autoblock=' ' THEN 0 ELSE ipb_enable_autoblock::smallint END DEFAULT 1" ],
 199                         [ 'changeField', 'ipblocks', 'ipb_block_email', 'smallint',
 200                                 "CASE WHEN ipb_block_email=' ' THEN 0 ELSE ipb_block_email::smallint END DEFAULT 0" ],
 201                         [ 'changeField', 'ipblocks', 'ipb_address', 'text', 'ipb_address::text' ],
 202                         [ 'changeField', 'ipblocks', 'ipb_deleted', 'smallint', 'ipb_deleted::smallint DEFAULT 0' ],
 203                         [ 'changeField', 'mwuser', 'user_token', 'text', '' ],
 204                         [ 'changeField', 'mwuser', 'user_email_token', 'text', '' ],
 205                         [ 'changeField', 'objectcache', 'keyname', 'text', '' ],
 206                         [ 'changeField', 'oldimage', 'oi_height', 'integer', '' ],
 207                         [ 'changeField', 'oldimage', 'oi_metadata', 'bytea', "decode(img_metadata,'escape')" ],
 208                         [ 'changeField', 'oldimage', 'oi_size', 'integer', '' ],
 209                         [ 'changeField', 'oldimage', 'oi_width', 'integer', '' ],
 210                         [ 'changeField', 'page', 'page_is_redirect', 'smallint',
 211                                 'page_is_redirect::smallint DEFAULT 0' ],
 212                         [ 'changeField', 'page', 'page_is_new', 'smallint', 'page_is_new::smallint DEFAULT 0' ],
 213                         [ 'changeField', 'querycache', 'qc_value', 'integer', '' ],
 214                         [ 'changeField', 'querycachetwo', 'qcc_value', 'integer', '' ],
 215                         [ 'changeField', 'recentchanges', 'rc_bot', 'smallint', 'rc_bot::smallint DEFAULT 0' ],
 216                         [ 'changeField', 'recentchanges', 'rc_deleted', 'smallint', '' ],
 217                         [ 'changeField', 'recentchanges', 'rc_minor', 'smallint', 'rc_minor::smallint DEFAULT 0' ],
 218                         [ 'changeField', 'recentchanges', 'rc_new', 'smallint', 'rc_new::smallint DEFAULT 0' ],
 219                         [ 'changeField', 'recentchanges', 'rc_type', 'smallint', 'rc_type::smallint DEFAULT 0' ],
 220                         [ 'changeField', 'recentchanges', 'rc_patrolled', 'smallint',
 221                                 'rc_patrolled::smallint DEFAULT 0' ],
 222                         [ 'changeField', 'revision', 'rev_deleted', 'smallint', 'rev_deleted::smallint DEFAULT 0' ],
 223                         [ 'changeField', 'revision', 'rev_minor_edit', 'smallint',
 224                                 'rev_minor_edit::smallint DEFAULT 0' ],
 225                         [ 'changeField', 'templatelinks', 'tl_namespace', 'smallint', 'tl_namespace::smallint' ],
 226                         [ 'changeField', 'user_newtalk', 'user_ip', 'text', 'host(user_ip)' ],
 227                         [ 'changeField', 'uploadstash', 'us_image_bits', 'smallint', '' ],
 228                         [ 'changeField', 'profiling', 'pf_time', 'float', '' ],
 229                         [ 'changeField', 'profiling', 'pf_memory', 'float', '' ],
 230
 231                         # null changes
 232                         [ 'changeNullableField', 'oldimage', 'oi_bits', 'NULL' ],
 233                         [ 'changeNullableField', 'oldimage', 'oi_timestamp', 'NULL' ],
 234                         [ 'changeNullableField', 'oldimage', 'oi_major_mime', 'NULL' ],
 235                         [ 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NULL' ],
 236                         [ 'changeNullableField', 'image', 'img_metadata', 'NOT NULL' ],
 237                         [ 'changeNullableField', 'filearchive', 'fa_metadata', 'NOT NULL' ],
 238                         [ 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NULL' ],
 239                         [ 'changeNullableField', 'recentchanges', 'rc_cur_time', 'NULL' ],
 240
 241                         [ 'checkOiDeleted' ],
 242
 243                         # New indexes
 244                         [ 'addPgIndex', 'archive', 'archive_user_text', '(ar_user_text)' ],
 245                         [ 'addPgIndex', 'image', 'img_sha1', '(img_sha1)' ],
 246                         [ 'addPgIndex', 'ipblocks', 'ipb_parent_block_id', '(ipb_parent_block_id)' ],
 247                         [ 'addPgIndex', 'oldimage', 'oi_sha1', '(oi_sha1)' ],
 248                         [ 'addPgIndex', 'page', 'page_mediawiki_title', '(page_title) WHERE page_namespace = 8' ],
 249                         [ 'addPgIndex', 'pagelinks', 'pagelinks_title', '(pl_title)' ],
 250                         [ 'addPgIndex', 'page_props', 'pp_propname_page', '(pp_propname, pp_page)' ],
 251                         [ 'addPgIndex', 'revision', 'rev_text_id_idx', '(rev_text_id)' ],
 252                         [ 'addPgIndex', 'recentchanges', 'rc_timestamp_bot', '(rc_timestamp) WHERE rc_bot = 0' ],
 253                         [ 'addPgIndex', 'templatelinks', 'templatelinks_from', '(tl_from)' ],
 254                         [ 'addPgIndex', 'watchlist', 'wl_user', '(wl_user)' ],
 255                         [ 'addPgIndex', 'watchlist', 'wl_user_notificationtimestamp',
 256                                 '(wl_user, wl_notificationtimestamp)' ],
 257                         [ 'addPgIndex', 'logging', 'logging_user_type_time',
 258                                 '(log_user, log_type, log_timestamp)' ],
 259                         [ 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ],
 260                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ],
 261                         [ 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ],
 262                         [ 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ],
 263                         [ 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ],
 264                         [ 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ],
 265                         [ 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ],
 266                         [ 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ],
 267                         [ 'addPgIndex', 'logging', 'logging_user_text_type_time',
 268                                 '(log_user_text, log_type, log_timestamp)' ],
 269                         [ 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ],
 270
 271                         [ 'checkIndex', 'pagelink_unique', [
 272                                 [ 'pl_from', 'int4_ops', 'btree', 0 ],
 273                                 [ 'pl_namespace', 'int2_ops', 'btree', 0 ],
 274                                 [ 'pl_title', 'text_ops', 'btree', 0 ],
 275                         ],
 276                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ],
 277                         [ 'checkIndex', 'cl_sortkey', [
 278                                 [ 'cl_to', 'text_ops', 'btree', 0 ],
 279                                 [ 'cl_sortkey', 'text_ops', 'btree', 0 ],
 280                                 [ 'cl_from', 'int4_ops', 'btree', 0 ],
 281                         ],
 282                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 283                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ],
 284                         [ 'checkIndex', 'iwl_prefix_title_from', [
 285                                 [ 'iwl_prefix', 'text_ops', 'btree', 0 ],
 286                                 [ 'iwl_title', 'text_ops', 'btree', 0 ],
 287                                 [ 'iwl_from', 'int4_ops', 'btree', 0 ],
 288                         ],
 289                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 290                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ],
 291                         [ 'checkIndex', 'logging_times', [
 292                                 [ 'log_timestamp', 'timestamptz_ops', 'btree', 0 ],
 293                         ],
 294                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ],
 295                         [ 'dropIndex', 'oldimage', 'oi_name' ],
 296                         [ 'checkIndex', 'oi_name_archive_name', [
 297                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 298                                 [ 'oi_archive_name', 'text_ops', 'btree', 0 ],
 299                         ],
 300                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 301                                 'USING "btree" ("oi_name", "oi_archive_name")' ],
 302                         [ 'checkIndex', 'oi_name_timestamp', [
 303                                 [ 'oi_name', 'text_ops', 'btree', 0 ],
 304                                 [ 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ],
 305                         ],
 306                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 307                                 'USING "btree" ("oi_name", "oi_timestamp")' ],
 308                         [ 'checkIndex', 'page_main_title', [
 309                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 310                         ],
 311                         'CREATE INDEX "page_main_title" ON "page" ' .
 312                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ],
 313                         [ 'checkIndex', 'page_mediawiki_title', [
 314                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 315                         ],
 316                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 317                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ],
 318                         [ 'checkIndex', 'page_project_title', [
 319                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 320                         ],
 321                         'CREATE INDEX "page_project_title" ON "page" ' .
 322                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 323                                 'WHERE ("page_namespace" = 4)' ],
 324                         [ 'checkIndex', 'page_talk_title', [
 325                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 326                         ],
 327                         'CREATE INDEX "page_talk_title" ON "page" ' .
 328                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 329                                 'WHERE ("page_namespace" = 1)' ],
 330                         [ 'checkIndex', 'page_user_title', [
 331                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 332                         ],
 333                         'CREATE INDEX "page_user_title" ON "page" ' .
 334                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 335                                 '("page_namespace" = 2)' ],
 336                         [ 'checkIndex', 'page_utalk_title', [
 337                                 [ 'page_title', 'text_pattern_ops', 'btree', 0 ],
 338                         ],
 339                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 340                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 341                                 'WHERE ("page_namespace" = 3)' ],
 342                         [ 'checkIndex', 'ts2_page_text', [
 343                                 [ 'textvector', 'tsvector_ops', 'gist', 0 ],
 344                         ],
 345                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ],
 346                         [ 'checkIndex', 'ts2_page_title', [
 347                                 [ 'titlevector', 'tsvector_ops', 'gist', 0 ],
 348                         ],
 349                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ],
 350
 351                         [ 'checkOiNameConstraint' ],
 352                         [ 'checkPageDeletedTrigger' ],
 353                         [ 'checkRevUserFkey' ],
 354                         [ 'dropIndex', 'ipblocks', 'ipb_address' ],
 355                         [ 'checkIndex', 'ipb_address_unique', [
 356                                 [ 'ipb_address', 'text_ops', 'btree', 0 ],
 357                                 [ 'ipb_user', 'int4_ops', 'btree', 0 ],
 358                                 [ 'ipb_auto', 'int2_ops', 'btree', 0 ],
 359                                 [ 'ipb_anon_only', 'int2_ops', 'btree', 0 ],
 360                         ],
 361                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 362                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ],
 363
 364                         [ 'checkIwlPrefix' ],
 365
 366                         # All FK columns should be deferred
 367                         [ 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 368                         [ 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ],
 369                         [ 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ],
 370                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 371                                 'mwuser(user_id) ON DELETE SET NULL' ],
 372                         [ 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 373                         [ 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 374                         [ 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ],
 375                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ],
 376                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 377                         [ 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 378                                 'ipblocks(ipb_id) ON DELETE SET NULL' ],
 379                         [ 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ],
 380                         [ 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 381                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 382                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ],
 383                         [ 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ],
 384                         [ 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ],
 385                         [ 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ],
 386                         [ 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 387                                 'page(page_id) ON DELETE CASCADE' ],
 388                         [ 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 389                                 'mwuser(user_id) ON DELETE SET NULL' ],
 390                         [ 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 391                                 'mwuser(user_id) ON DELETE SET NULL' ],
 392                         [ 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ],
 393                         [ 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ],
 394                         [ 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ],
 395                         [ 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ],
 396                         [ 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 397                         [ 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ],
 398                         [ 'changeFkeyDeferrable', 'user_properties', 'up_user',
 399                                 'mwuser(user_id) ON DELETE CASCADE' ],
 400                         [ 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ],
 401
 402                         # r81574
 403                         [ 'addInterwikiType' ],
 404                         # end
 405                         [ 'tsearchFixes' ],
 406
 407                         // 1.23
 408                         [ 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ],
 409                         [ 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ],
 410                         [ 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ],
 411                         [ 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 412                                 "replace(lc_value,'\','\\\\')::bytea" ],
 413                         // 1.23.9
 414                         [ 'rebuildTextSearch' ],
 415
 416                         // 1.24
 417                         [ 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ],
 418                         [ 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 419                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ],
 420                         [ 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ],
 421                         [ 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 422                         [ 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 423                         [ 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ],
 424
 425                         // 1.25
 426                         [ 'dropTable', 'hitcounter' ],
 427                         [ 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ],
 428                         [ 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ],
 429                         [ 'dropFkey', 'recentchanges', 'rc_cur_id' ],
 430
 431                         // 1.27
 432                         [ 'dropTable', 'msg_resource_links' ],
 433                         [ 'dropTable', 'msg_resource' ],
 434                         [
 435                                 'addPgField', 'watchlist', 'wl_id',
 436                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('watchlist_wl_id_seq')"
 437                         ],
 438
 439                         // 1.28
 440                         [ 'addPgIndex', 'recentchanges', 'rc_name_type_patrolled_timestamp',
 441                                 '( rc_namespace, rc_type, rc_patrolled, rc_timestamp )' ],
 442                         [ 'addPgField', 'change_tag', 'ct_id',
 443                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('change_tag_ct_id_seq')" ],
 444                         [ 'addPgField', 'tag_summary', 'ts_id',
 445                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('tag_summary_ts_id_seq')" ],
 446                 ];
 447         }
 448
 449         protected function getOldGlobalUpdates() {
 450                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 451
 452                 $updates = [];
 453
 454                 # Add missing extension tables
 455                 foreach ( $wgExtNewTables as $tableRecord ) {
 456                         $updates[] = [
 457                                 'addTable', $tableRecord[0], $tableRecord[1], true
 458                         ];
 459                 }
 460
 461                 # Add missing extension fields
 462                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 463                         $updates[] = [
 464                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 465                                 $fieldRecord[2]
 466                         ];
 467                 }
 468
 469                 # Change altered columns
 470                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 471                         $updates[] = [
 472                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 473                                 $fieldRecord[2]
 474                         ];
 475                 }
 476
 477                 # Add missing extension indexes
 478                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 479                         $updates[] = [
 480                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 481                                 $fieldRecord[2]
 482                         ];
 483                 }
 484
 485                 return $updates;
 486         }
 487
 488         protected function describeTable( $table ) {
 489                 $q = <<<END
 490 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 491         WHERE pg_class.relnamespace = pg_namespace.oid
 492           AND attrelid=pg_class.oid AND attnum > 0
 493           AND relname=%s AND nspname=%s
 494 END;
 495                 $res = $this->db->query( sprintf( $q,
 496                         $this->db->addQuotes( $table ),
 497                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 498                 if ( !$res ) {
 499                         return null;
 500                 }
 501
 502                 $cols = [];
 503                 foreach ( $res as $r ) {
 504                         $cols[] = [
 505                                 "name" => $r[0],
 506                                 "ord" => $r[1],
 507                         ];
 508                 }
 509
 510                 return $cols;
 511         }
 512
 513         function describeIndex( $idx ) {
 514                 // first fetch the key (which is a list of columns ords) and
 515                 // the table the index applies to (an oid)
 516                 $q = <<<END
 517 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 518         WHERE nspname=%s
 519           AND pg_class.relnamespace = pg_namespace.oid
 520           AND relname=%s
 521           AND indexrelid=pg_class.oid
 522 END;
 523                 $res = $this->db->query(
 524                         sprintf(
 525                                 $q,
 526                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 527                                 $this->db->addQuotes( $idx )
 528                         )
 529                 );
 530                 if ( !$res ) {
 531                         return null;
 532                 }
 533                 $r = $this->db->fetchRow( $res );
 534                 if ( !$r ) {
 535                         return null;
 536                 }
 537
 538                 $indkey = $r[0];
 539                 $relid = intval( $r[1] );
 540                 $indkeys = explode( ' ', $indkey );
 541
 542                 $colnames = [];
 543                 foreach ( $indkeys as $rid ) {
 544                         $query = <<<END
 545 SELECT attname FROM pg_class, pg_attribute
 546         WHERE attrelid=$relid
 547           AND attnum=%d
 548           AND attrelid=pg_class.oid
 549 END;
 550                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 551                         if ( !$r2 ) {
 552                                 return null;
 553                         }
 554                         $row2 = $this->db->fetchRow( $r2 );
 555                         if ( !$row2 ) {
 556                                 return null;
 557                         }
 558                         $colnames[] = $row2[0];
 559                 }
 560
 561                 return $colnames;
 562         }
 563
 564         function fkeyDeltype( $fkey ) {
 565                 $q = <<<END
 566 SELECT confdeltype FROM pg_constraint, pg_namespace
 567         WHERE connamespace=pg_namespace.oid
 568           AND nspname=%s
 569           AND conname=%s;
 570 END;
 571                 $r = $this->db->query(
 572                         sprintf(
 573                                 $q,
 574                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 575                                 $this->db->addQuotes( $fkey )
 576                         )
 577                 );
 578                 $row = $this->db->fetchRow( $r );
 579                 if ( !$row ) {
 580                         return null;
 581                 }
 582
 583                 return $row[0];
 584         }
 585
 586         function ruleDef( $table, $rule ) {
 587                 $q = <<<END
 588 SELECT definition FROM pg_rules
 589         WHERE schemaname = %s
 590           AND tablename = %s
 591           AND rulename = %s
 592 END;
 593                 $r = $this->db->query(
 594                         sprintf(
 595                                 $q,
 596                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 597                                 $this->db->addQuotes( $table ),
 598                                 $this->db->addQuotes( $rule )
 599                         )
 600                 );
 601                 $row = $this->db->fetchRow( $r );
 602                 if ( !$row ) {
 603                         return null;
 604                 }
 605                 $d = $row[0];
 606
 607                 return $d;
 608         }
 609
 610         protected function addSequence( $table, $pkey, $ns ) {
 611                 if ( !$this->db->sequenceExists( $ns ) ) {
 612                         $this->output( "Creating sequence $ns\n" );
 613                         $this->db->query( "CREATE SEQUENCE $ns" );
 614                         if ( $pkey !== false ) {
 615                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 616                         }
 617                 }
 618         }
 619
 620         protected function renameSequence( $old, $new ) {
 621                 if ( $this->db->sequenceExists( $new ) ) {
 622                         $this->output( "...sequence $new already exists.\n" );
 623
 624                         return;
 625                 }
 626                 if ( $this->db->sequenceExists( $old ) ) {
 627                         $this->output( "Renaming sequence $old to $new\n" );
 628                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 629                 }
 630         }
 631
 632         protected function renameTable( $old, $new, $patch = false ) {
 633                 if ( $this->db->tableExists( $old ) ) {
 634                         $this->output( "Renaming table $old to $new\n" );
 635                         $old = $this->db->realTableName( $old, "quoted" );
 636                         $new = $this->db->realTableName( $new, "quoted" );
 637                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 638                         if ( $patch !== false ) {
 639                                 $this->applyPatch( $patch );
 640                         }
 641                 }
 642         }
 643
 644         protected function renameIndex(
 645                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 646         ) {
 647                 // First requirement: the table must exist
 648                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 649                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 650
 651                         return;
 652                 }
 653
 654                 // Second requirement: the new index must be missing
 655                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 656                         $this->output( "...index $new already set on $table table.\n" );
 657                         if ( !$skipBothIndexExistWarning
 658                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 659                         ) {
 660                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 661                                         "renamed into $new (which also exists).\n" .
 662                                         "            $old should be manually removed if not needed anymore.\n" );
 663                         }
 664
 665                         return;
 666                 }
 667
 668                 // Third requirement: the old index must exist
 669                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 670                         $this->output( "...skipping: index $old doesn't exist.\n" );
 671
 672                         return;
 673                 }
 674
 675                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 676         }
 677
 678         protected function addPgField( $table, $field, $type ) {
 679                 $fi = $this->db->fieldInfo( $table, $field );
 680                 if ( !is_null( $fi ) ) {
 681                         $this->output( "...column '$table.$field' already exists\n" );
 682
 683                         return;
 684                 } else {
 685                         $this->output( "Adding column '$table.$field'\n" );
 686                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 687                 }
 688         }
 689
 690         protected function changeField( $table, $field, $newtype, $default ) {
 691                 $fi = $this->db->fieldInfo( $table, $field );
 692                 if ( is_null( $fi ) ) {
 693                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 694                         exit( 1 );
 695                 }
 696
 697                 if ( $fi->type() === $newtype ) {
 698                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 699                 } else {
 700                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 701                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 702                         if ( strlen( $default ) ) {
 703                                 $res = [];
 704                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 705                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 706                                         $this->db->query( $sqldef );
 707                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 708                                 }
 709                                 $sql .= " USING $default";
 710                         }
 711                         $this->db->query( $sql );
 712                 }
 713         }
 714
 715         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 716                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 717                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 718                 $fi = $this->db->fieldInfo( $table, $field );
 719                 if ( is_null( $fi ) ) {
 720                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 721                         exit( 1 );
 722                 }
 723
 724                 if ( $fi->type() === $newtype ) {
 725                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 726                 } else {
 727                         $this->output( "Purging data from cache table '$table'\n" );
 728                         $this->db->query( "DELETE from $table" );
 729                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 730                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 731                         if ( strlen( $default ) ) {
 732                                 $res = [];
 733                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 734                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 735                                         $this->db->query( $sqldef );
 736                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 737                                 }
 738                                 $sql .= " USING $default";
 739                         }
 740                         $this->db->query( $sql );
 741                 }
 742         }
 743
 744         protected function setDefault( $table, $field, $default ) {
 745
 746                 $info = $this->db->fieldInfo( $table, $field );
 747                 if ( $info->defaultValue() !== $default ) {
 748                         $this->output( "Changing '$table.$field' default value\n" );
 749                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 750                 }
 751         }
 752
 753         protected function changeNullableField( $table, $field, $null ) {
 754                 $fi = $this->db->fieldInfo( $table, $field );
 755                 if ( is_null( $fi ) ) {
 756                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 757                         exit( 1 );
 758                 }
 759                 if ( $fi->isNullable() ) {
 760                         # # It's NULL - does it need to be NOT NULL?
 761                         if ( 'NOT NULL' === $null ) {
 762                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 763                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 764                         } else {
 765                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 766                         }
 767                 } else {
 768                         # # It's NOT NULL - does it need to be NULL?
 769                         if ( 'NULL' === $null ) {
 770                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 771                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 772                         } else {
 773                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 774                         }
 775                 }
 776         }
 777
 778         public function addPgIndex( $table, $index, $type ) {
 779                 if ( $this->db->indexExists( $table, $index ) ) {
 780                         $this->output( "...index '$index' on table '$table' already exists\n" );
 781                 } else {
 782                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 783                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 784                 }
 785         }
 786
 787         public function addPgExtIndex( $table, $index, $type ) {
 788                 if ( $this->db->indexExists( $table, $index ) ) {
 789                         $this->output( "...index '$index' on table '$table' already exists\n" );
 790                 } else {
 791                         if ( preg_match( '/^\(/', $type ) ) {
 792                                 $this->output( "Creating index '$index' on table '$table'\n" );
 793                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 794                         } else {
 795                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 796                         }
 797                 }
 798         }
 799
 800         protected function dropFkey( $table, $field ) {
 801                 $fi = $this->db->fieldInfo( $table, $field );
 802                 if ( is_null( $fi ) ) {
 803                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 804                                 "Please report this.\n" );
 805                         return;
 806                 }
 807                 $conname = $fi->conname();
 808                 if ( $fi->conname() ) {
 809                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
 810                         $conclause = "CONSTRAINT \"$conname\"";
 811                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 812                         $this->db->query( $command );
 813                 } else {
 814                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
 815                 };
 816         }
 817
 818         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 819                 $fi = $this->db->fieldInfo( $table, $field );
 820                 if ( is_null( $fi ) ) {
 821                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 822                                 "Please report this.\n" );
 823
 824                         return;
 825                 }
 826                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 827                         return;
 828                 }
 829                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 830                 $conname = $fi->conname();
 831                 if ( $fi->conname() ) {
 832                         $conclause = "CONSTRAINT \"$conname\"";
 833                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 834                         $this->db->query( $command );
 835                 } else {
 836                         $this->output( "Column '$table.$field' does not have a foreign key " .
 837                                 "constraint, will be added\n" );
 838                         $conclause = "";
 839                 }
 840                 $command =
 841                         "ALTER TABLE $table ADD $conclause " .
 842                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 843                 $this->db->query( $command );
 844         }
 845
 846         protected function convertArchive2() {
 847                 if ( $this->db->tableExists( "archive2" ) ) {
 848                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 849                                 $this->output( "Dropping rule 'archive_insert'\n" );
 850                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 851                         }
 852                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 853                                 $this->output( "Dropping rule 'archive_delete'\n" );
 854                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 855                         }
 856                         $this->applyPatch(
 857                                 'patch-remove-archive2.sql',
 858                                 false,
 859                                 "Converting 'archive2' back to normal archive table"
 860                         );
 861                 } else {
 862                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 863                 }
 864         }
 865
 866         protected function checkOiDeleted() {
 867                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 868                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 869                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 870                         $this->db->query(
 871                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 872                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 873                 } else {
 874                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 875                 }
 876         }
 877
 878         protected function checkOiNameConstraint() {
 879                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 880                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 881                                 "foreign key to image\n" );
 882                 } else {
 883                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 884                                 $this->db->query(
 885                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 886                         }
 887                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 888                                 $this->db->query(
 889                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 890                         }
 891                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 892                         $this->db->query(
 893                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 894                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 895                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 896                 }
 897         }
 898
 899         protected function checkPageDeletedTrigger() {
 900                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 901                         $this->applyPatch(
 902                                 'patch-page_deleted.sql',
 903                                 false,
 904                                 "Adding function and trigger 'page_deleted' to table 'page'"
 905                         );
 906                 } else {
 907                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 908                 }
 909         }
 910
 911         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 912                 if ( $this->db->indexExists( $table, $index ) ) {
 913                         $this->output( "Dropping obsolete index '$index'\n" );
 914                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 915                 }
 916         }
 917
 918         protected function checkIndex( $index, $should_be, $good_def ) {
 919                 $pu = $this->db->indexAttributes( $index );
 920                 if ( !empty( $pu ) && $pu != $should_be ) {
 921                         $this->output( "Dropping obsolete version of index '$index'\n" );
 922                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 923                         $pu = [];
 924                 } else {
 925                         $this->output( "...no need to drop index '$index'\n" );
 926                 }
 927
 928                 if ( empty( $pu ) ) {
 929                         $this->output( "Creating index '$index'\n" );
 930                         $this->db->query( $good_def );
 931                 } else {
 932                         $this->output( "...index '$index' exists\n" );
 933                 }
 934         }
 935
 936         protected function checkRevUserFkey() {
 937                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 938                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 939                 } else {
 940                         $this->applyPatch(
 941                                 'patch-revision_rev_user_fkey.sql',
 942                                 false,
 943                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 944                         );
 945                 }
 946         }
 947
 948         protected function checkIwlPrefix() {
 949                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 950                         $this->applyPatch(
 951                                 'patch-rename-iwl_prefix.sql',
 952                                 false,
 953                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 954                         );
 955                 }
 956         }
 957
 958         protected function addInterwikiType() {
 959                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 960         }
 961
 962         protected function tsearchFixes() {
 963                 # Tweak the page_title tsearch2 trigger to filter out slashes
 964                 # This is create or replace, so harmless to call if not needed
 965                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 966
 967                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 968                 # in case they have the old 'default' versions
 969                 # Gather version numbers in case we need them
 970                 if ( $this->db->getServerVersion() >= 8.3 ) {
 971                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 972                 }
 973         }
 974
 975         protected function rebuildTextSearch() {
 976                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
 977                         $this->output( "...bug 66650 already fixed or not applicable.\n" );
 978                         return true;
 979                 };
 980                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
 981                         'Rebuilding text search for bug 66650' );
 982         }
 983 }