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 Installer
  22  */
  23
  24 namespace MediaWiki\Installer;
  25
  26 use FixInconsistentRedirects;
  27 use MediaWiki\Maintenance\FixAutoblockLogTitles;
  28 use MigrateExternallinks;
  29 use MigrateRevisionActorTemp;
  30 use MigrateRevisionCommentTemp;
  31 use PopulateUserIsTemp;
  32 use UpdateRestrictions;
  33 use Wikimedia\Rdbms\DatabasePostgres;
  34
  35 /**
  36  * Class for handling updates to Postgres databases.
  37  *
  38  * @ingroup Installer
  39  * @since 1.17
  40  */
  41 class PostgresUpdater extends DatabaseUpdater {
  42
  43         /**
  44          * @var DatabasePostgres
  45          */
  46         protected $db;
  47
  48         /**
  49          * @return array
  50          */
  51         protected function getCoreUpdateList() {
  52                 return [
  53                         // Exception to the sequential updates. Renaming pagecontent and mwuser.
  54                         // Introduced in 1.36.
  55                         [ 'renameTable', 'pagecontent', 'text' ],
  56                         // Introduced in 1.37.
  57                         [ 'renameTable', 'mwuser', 'user' ],
  58
  59                         // 1.36
  60                         [ 'setDefault', 'bot_passwords', 'bp_token', '' ],
  61                         [ 'changeField', 'comment', 'comment_id', 'BIGINT', '' ],
  62                         [ 'changeField', 'slots', 'slot_revision_id', 'BIGINT', '' ],
  63                         [ 'changeField', 'slots', 'slot_content_id', 'BIGINT', '' ],
  64                         [ 'changeField', 'slots', 'slot_origin', 'BIGINT', '' ],
  65                         [ 'changeField', 'site_stats', 'ss_total_edits', 'BIGINT', '' ],
  66                         [ 'changeField', 'site_stats', 'ss_good_articles', 'BIGINT', '' ],
  67                         [ 'changeField', 'site_stats', 'ss_total_pages', 'BIGINT', '' ],
  68                         [ 'changeField', 'site_stats', 'ss_users', 'BIGINT', '' ],
  69                         [ 'changeField', 'site_stats', 'ss_active_users', 'BIGINT', '' ],
  70                         [ 'changeField', 'site_stats', 'ss_images', 'BIGINT', '' ],
  71                         [ 'dropFkey', 'user_properties', 'up_user' ],
  72                         [ 'addIndex', 'user_properties', 'user_properties_pkey', 'patch-user_properties-pk.sql' ],
  73                         [ 'changeField', 'log_search', 'ls_value', 'VARCHAR(255)', '' ],
  74                         [ 'changeField', 'content', 'content_id', 'BIGINT', '' ],
  75                         [ 'changeField', 'l10n_cache', 'lc_value', 'TEXT', '' ],
  76                         [ 'changeField', 'l10n_cache', 'lc_key', 'VARCHAR(255)', '' ],
  77                         [ 'addIndex', 'l10n_cache', 'l10n_cache_pkey', 'patch-l10n_cache-pk.sql' ],
  78                         [ 'addIndex', 'module_deps', 'module_deps_pkey', 'patch-module_deps-pk.sql' ],
  79                         [ 'changeField', 'redirect', 'rd_namespace', 'INT', 'rd_namespace::INT DEFAULT 0' ],
  80                         [ 'setDefault', 'redirect', 'rd_title', '' ],
  81                         [ 'setDefault', 'redirect', 'rd_from', 0 ],
  82                         [ 'dropFkey', 'redirect', 'rd_from' ],
  83                         [ 'changeField', 'redirect', 'rd_interwiki', 'VARCHAR(32)', '' ],
  84                         [ 'dropFkey', 'pagelinks', 'pl_from' ],
  85                         [ 'dropPgIndex', 'pagelinks', 'pagelink_unique' ],
  86                         [ 'dropPgIndex', 'pagelinks', 'pagelinks_title' ],
  87                         [ 'dropFkey', 'templatelinks', 'tl_from' ],
  88                         [ 'dropPgIndex', 'templatelinks', 'templatelinks_unique' ],
  89                         [ 'dropPgIndex', 'templatelinks', 'templatelinks_from' ],
  90                         [ 'dropFkey', 'imagelinks', 'il_from' ],
  91                         [ 'setDefault', 'imagelinks', 'il_to', '' ],
  92                         [ 'addPgIndex', 'imagelinks', 'il_to', '(il_to, il_from)' ],
  93                         [ 'addPgIndex', 'imagelinks', 'il_backlinks_namespace',
  94                                 '(il_from_namespace, il_to, il_from)' ],
  95                         [ 'dropPgIndex', 'imagelinks', 'il_from' ],
  96                         [ 'dropFkey', 'langlinks', 'll_from' ],
  97                         [ 'addIndex', 'langlinks', 'langlinks_pkey', 'patch-langlinks-pk.sql' ],
  98                         [ 'renameIndex', 'langlinks', 'langlinks_lang_title', 'll_lang' ],
  99                         [ 'setDefault', 'langlinks', 'll_lang', '' ],
 100                         [ 'setDefault', 'langlinks', 'll_from', 0 ],
 101                         [ 'setDefault', 'langlinks', 'll_title', '' ],
 102                         [ 'changeNullableField', 'langlinks', 'll_lang', 'NOT NULL', true ],
 103                         [ 'changeNullableField', 'langlinks', 'll_title', 'NOT NULL', true ],
 104                         [ 'addIndex', 'iwlinks', 'iwlinks_pkey', 'patch-iwlinks-pk.sql' ],
 105                         [ 'renameIndex', 'category', 'category_title', 'cat_title' ],
 106                         [ 'renameIndex', 'category', 'category_pages', 'cat_pages' ],
 107                         [ 'dropSequence', 'watchlist_expiry', 'watchlist_expiry_we_item_seq' ],
 108                         [ 'changeField', 'change_tag_def', 'ctd_count', 'BIGINT', 'ctd_count::BIGINT DEFAULT 0' ],
 109                         [ 'dropDefault', 'change_tag_def', 'ctd_user_defined' ],
 110                         [ 'dropFkey', 'ipblocks_restrictions', 'ir_ipb_id' ],
 111                         [ 'setDefault', 'querycache', 'qc_value', 0 ],
 112                         [ 'changeField', 'querycache', 'qc_namespace', 'INT', 'qc_namespace::INT DEFAULT 0' ],
 113                         [ 'setDefault', 'querycache', 'qc_title', '' ],
 114                         [ 'renameIndex', 'querycache', 'querycache_type_value', 'qc_type' ],
 115                         [ 'renameIndex', 'querycachetwo', 'querycachetwo_type_value', 'qcc_type' ],
 116                         [ 'renameIndex', 'querycachetwo', 'querycachetwo_title', 'qcc_title' ],
 117                         [ 'renameIndex', 'querycachetwo', 'querycachetwo_titletwo', 'qcc_titletwo' ],
 118                         [ 'dropFkey', 'page_restrictions', 'pr_page' ],
 119                         [ 'addPgIndex', 'page_restrictions', 'pr_pagetype', '(pr_page, pr_type)', true ],
 120                         [ 'addPgIndex', 'page_restrictions', 'pr_typelevel', '(pr_type, pr_level)' ],
 121                         [ 'addPgIndex', 'page_restrictions', 'pr_level', '(pr_level)' ],
 122                         [ 'addPgIndex', 'page_restrictions', 'pr_cascade', '(pr_cascade)' ],
 123                         [ 'changePrimaryKey', 'page_restrictions', [ 'pr_id' ], 'page_restrictions_pk' ],
 124                         [ 'changeNullableField', 'page_restrictions', 'pr_page', 'NOT NULL', true ],
 125                         [ 'dropFkey', 'user_groups', 'ug_user' ],
 126                         [ 'setDefault', 'user_groups', 'ug_user', 0 ],
 127                         [ 'setDefault', 'user_groups', 'ug_group', '' ],
 128                         [ 'renameIndex', 'user_groups', 'user_groups_group', 'ug_group' ],
 129                         [ 'renameIndex', 'user_groups', 'user_groups_expiry', 'ug_expiry' ],
 130                         [ 'setDefault', 'querycache_info', 'qci_type', '' ],
 131                         [ 'setDefault', 'querycache_info', 'qci_timestamp', '1970-01-01 00:00:00+00' ],
 132                         [ 'changeNullableField', 'querycache_info', 'qci_type', 'NOT NULL', true ],
 133                         [ 'changeNullableField', 'querycache_info', 'qci_timestamp', 'NOT NULL', true ],
 134                         [ 'addIndex', 'querycache_info', 'querycache_info_pkey', 'patch-querycache_info-pk.sql' ],
 135                         [ 'setDefault', 'watchlist', 'wl_title', '' ],
 136                         [ 'changeField', 'watchlist', 'wl_namespace', 'INT', 'wl_namespace::INT DEFAULT 0' ],
 137                         [ 'dropFkey', 'watchlist', 'wl_user' ],
 138                         [ 'dropPgIndex', 'watchlist', 'wl_user_namespace_title' ],
 139                         [ 'addPgIndex', 'watchlist', 'namespace_title', '(wl_namespace, wl_title)' ],
 140                         [ 'checkIndex', 'wl_user', [
 141                                         [ 'wl_user', 'text_ops', 'btree', 1 ],
 142                                         [ 'wl_namespace', 'int4_ops', 'btree', 1 ],
 143                                         [ 'wl_title', 'text_ops', 'btree', 1 ],
 144                                 ],
 145                                 'CREATE UNIQUE INDEX "wl_user" ON "watchlist" (wl_user, wl_namespace, wl_title)'
 146                         ],
 147                         [ 'changeField', 'sites', 'site_domain', 'VARCHAR(255)', '' ],
 148                         [ 'renameIndex', 'sites', 'site_global_key', 'sites_global_key' ],
 149                         [ 'renameIndex', 'sites', 'site_type', 'sites_type' ],
 150                         [ 'renameIndex', 'sites', 'site_group', 'sites_group' ],
 151                         [ 'renameIndex', 'sites', 'site_source', 'sites_source' ],
 152                         [ 'renameIndex', 'sites', 'site_language', 'sites_language' ],
 153                         [ 'renameIndex', 'sites', 'site_protocol', 'sites_protocol' ],
 154                         [ 'renameIndex', 'sites', 'site_domain', 'sites_domain' ],
 155                         [ 'renameIndex', 'sites', 'site_forward', 'sites_forward' ],
 156                         [ 'dropFkey', 'user_newtalk', 'user_id' ],
 157                         [ 'renameIndex', 'user_newtalk', 'user_newtalk_id', 'un_user_id' ],
 158                         [ 'renameIndex', 'user_newtalk', 'user_newtalk_ip', 'un_user_ip' ],
 159                         [ 'changeField', 'interwiki', 'iw_prefix', 'VARCHAR(32)', '' ],
 160                         [ 'changeField', 'interwiki', 'iw_wikiid', 'VARCHAR(64)', '' ],
 161                         [ 'dropFkey', 'protected_titles', 'pt_user' ],
 162                         [ 'changeNullableField', 'protected_titles', 'pt_user', 'NOT NULL', true ],
 163                         [ 'changeNullableField', 'protected_titles', 'pt_expiry', 'NOT NULL', true ],
 164                         [ 'changeField', 'protected_titles', 'pt_reason_id', 'BIGINT', '' ],
 165                         [ 'dropDefault', 'protected_titles', 'pt_create_perm' ],
 166                         [ 'dropFkey', 'externallinks', 'el_from' ],
 167                         [ 'renameIndex', 'externallinks', 'externallinks_from_to', 'el_from' ],
 168                         [ 'renameIndex', 'externallinks', 'externallinks_index', 'el_index' ],
 169                         [ 'dropSequence', 'ip_changes', 'ip_changes_ipc_rev_id_seq' ],
 170                         [ 'changeField', 'ip_changes', 'ipc_hex', 'TEXT', "ipc_hex::TEXT DEFAULT ''" ],
 171                         [ 'setDefault', 'ip_changes', 'ipc_rev_id', 0 ],
 172                         [ 'renameIndex', 'watchlist', 'namespace_title', 'wl_namespace_title' ],
 173                         [ 'dropFkey', 'page_props', 'pp_page' ],
 174                         // page_props primary key change moved from the Schema SQL file to here in 1.36
 175                         [ 'changePrimaryKey', 'page_props', [ 'pp_page', 'pp_propname' ], 'page_props_pk' ],
 176                         [ 'setDefault', 'job', 'job_cmd', '' ],
 177                         [ 'changeField', 'job', 'job_namespace', 'INTEGER', '' ],
 178                         [ 'dropPgIndex', 'job', 'job_cmd_namespace_title' ],
 179                         [ 'addPgIndex', 'job', 'job_cmd', '(job_cmd, job_namespace, job_title, job_params)' ],
 180                         [ 'renameIndex', 'job', 'job_timestamp_idx', 'job_timestamp' ],
 181                         [ 'changeField', 'slot_roles', 'role_id', 'INTEGER', '' ],
 182                         [ 'changeField', 'content_models', 'model_id', 'INTEGER', '' ],
 183                         [ 'renameIndex', 'page', 'page_len_idx', 'page_len' ],
 184                         [ 'renameIndex', 'page', 'page_random_idx', 'page_random' ],
 185                         [ 'renameIndex', 'page', 'page_unique_name', 'page_name_title' ],
 186                         [ 'addPGIndex', 'page', 'page_redirect_namespace_len', '(page_is_redirect, page_namespace, page_len)' ],
 187                         [ 'dropFkey', 'categorylinks', 'cl_from' ],
 188                         [ 'setDefault', 'categorylinks', 'cl_from', 0 ],
 189                         [ 'setDefault', 'categorylinks', 'cl_to', '' ],
 190                         [ 'setDefault', 'categorylinks', 'cl_sortkey', '' ],
 191                         [ 'setDefault', 'categorylinks', 'cl_collation', '' ],
 192                         [ 'changeNullableField', 'categorylinks', 'cl_sortkey', 'NOT NULL', true ],
 193                         [ 'addIndex', 'categorylinks', 'categorylinks_pkey', 'patch-categorylinks-pk.sql' ],
 194                         [ 'addPgIndex', 'categorylinks', 'cl_timestamp', '(cl_to, cl_timestamp)' ],
 195                         [ 'addPgIndex', 'categorylinks', 'cl_collation_ext', '(cl_collation, cl_to, cl_type, cl_from)' ],
 196                         [ 'checkIndex', 'cl_sortkey', [
 197                                         [ 'cl_to', 'text_ops', 'btree', 1 ],
 198                                         [ 'cl_type', 'text_ops', 'btree', 1 ],
 199                                         [ 'cl_sortkey', 'text_ops', 'btree', 1 ],
 200                                         [ 'cl_from', 'text_ops', 'btree', 1 ],
 201                                 ],
 202                                 'CREATE INDEX cl_sortkey ON categorylinks (cl_to, cl_type, cl_sortkey, cl_from)'
 203                         ],
 204                         [ 'renameIndex', 'logging', 'logging_type_name', 'type_time' ],
 205                         [ 'renameIndex', 'logging', 'logging_actor_time_backwards', 'actor_time' ],
 206                         [ 'renameIndex', 'logging', 'logging_page_time', 'page_time' ],
 207                         [ 'renameIndex', 'logging', 'logging_times', 'times' ],
 208                         [ 'renameIndex', 'logging', 'logging_actor_type_time', 'log_actor_type_time' ],
 209                         [ 'renameIndex', 'logging', 'logging_page_id_time', 'log_page_id_time' ],
 210                         [ 'renameIndex', 'logging', 'logging_type_action', 'log_type_action' ],
 211                         [ 'changeNullableField', 'logging', 'log_params', 'NOT NULL', true ],
 212                         [ 'setDefault', 'logging', 'log_action', '' ],
 213                         [ 'setDefault', 'logging', 'log_type', '' ],
 214                         [ 'setDefault', 'logging', 'log_title', '' ],
 215                         [ 'setDefault', 'logging', 'log_timestamp', '1970-01-01 00:00:00+00' ],
 216                         [ 'changeField', 'logging', 'log_actor', 'BIGINT', '' ],
 217                         [ 'changeField', 'logging', 'log_comment_id', 'BIGINT', '' ],
 218                         [ 'changeField', 'logging', 'log_namespace', 'INT', 'log_namespace::INT DEFAULT 0' ],
 219                         [ 'dropPgIndex', 'logging', 'logging_actor_time' ],
 220                         [ 'changeField', 'uploadstash', 'us_key', 'VARCHAR(255)', '' ],
 221                         [ 'changeField', 'uploadstash', 'us_orig_path', 'VARCHAR(255)', '' ],
 222                         [ 'changeField', 'uploadstash', 'us_path', 'VARCHAR(255)', '' ],
 223                         [ 'changeField', 'uploadstash', 'us_source_type', 'VARCHAR(50)', '' ],
 224                         [ 'changeField', 'uploadstash', 'us_props', 'TEXT', '' ],
 225                         [ 'changeField', 'uploadstash', 'us_status', 'VARCHAR(50)', '' ],
 226                         [ 'changeField', 'uploadstash', 'us_sha1', 'VARCHAR(31)', '' ],
 227                         [ 'changeField', 'uploadstash', 'us_mime', 'VARCHAR(255)', '' ],
 228                         [ 'changeNullableField', 'uploadstash', 'us_key', 'NOT NULL', true ],
 229                         [ 'changeNullableField', 'uploadstash', 'us_user', 'NOT NULL', true ],
 230                         [ 'changeNullableField', 'uploadstash', 'us_orig_path', 'NOT NULL', true ],
 231                         [ 'changeNullableField', 'uploadstash', 'us_path', 'NOT NULL', true ],
 232                         [ 'changeNullableField', 'uploadstash', 'us_timestamp', 'NOT NULL', true ],
 233                         [ 'changeNullableField', 'uploadstash', 'us_status', 'NOT NULL', true ],
 234                         [ 'changeNullableField', 'uploadstash', 'us_size', 'NOT NULL', true ],
 235                         [ 'changeNullableField', 'uploadstash', 'us_sha1', 'NOT NULL', true ],
 236                         [ 'renameIndex', 'uploadstash', 'us_user_idx', 'us_user' ],
 237                         [ 'renameIndex', 'uploadstash', 'us_key_idx', 'us_key' ],
 238                         [ 'renameIndex', 'uploadstash', 'us_timestamp_idx', 'us_timestamp' ],
 239                         [ 'renameIndex', 'user_properties', 'user_properties_property', 'up_property' ],
 240                         [ 'renameIndex', 'sites', 'sites_global_key', 'site_global_key' ],
 241                         [ 'renameIndex', 'sites', 'sites_type', 'site_type' ],
 242                         [ 'renameIndex', 'sites', 'sites_group, ', 'site_group' ],
 243                         [ 'renameIndex', 'sites', 'sites_source', 'site_source' ],
 244                         [ 'renameIndex', 'sites', 'sites_language', 'site_language' ],
 245                         [ 'renameIndex', 'sites', 'sites_protocol', 'site_protocol' ],
 246                         [ 'renameIndex', 'sites', 'sites_domain', 'site_domain' ],
 247                         [ 'renameIndex', 'sites', 'sites_forward', 'site_forward' ],
 248                         [ 'renameIndex', 'logging', 'type_name', 'log_type_time' ],
 249                         [ 'renameIndex', 'logging', 'actor_time', 'log_actor_time' ],
 250                         [ 'renameIndex', 'logging', 'page_time', 'log_page_time' ],
 251                         [ 'renameIndex', 'logging', 'times', 'log_times' ],
 252                         [ 'setDefault', 'filearchive', 'fa_name', '' ],
 253                         [ 'setDefault', 'filearchive', 'fa_archive_name', '' ],
 254                         [ 'setDefault', 'filearchive', 'fa_storage_key', '' ],
 255                         [ 'dropFkey', 'filearchive', 'fa_deleted_user' ],
 256                         [ 'changeField', 'filearchive', 'fa_deleted_reason_id', 'BIGINT', '' ],
 257                         [ 'changeField', 'filearchive', 'fa_metadata', 'TEXT', '' ],
 258                         [ 'changeField', 'filearchive', 'fa_bits', 'INTEGER', '' ],
 259                         [ 'changeField', 'filearchive', 'fa_description_id', 'BIGINT', '' ],
 260                         [ 'changeField', 'filearchive', 'fa_actor', 'BIGINT', '' ],
 261                         [ 'renameIndex', 'filearchive', 'fa_name_time', 'fa_name' ],
 262                         [ 'renameIndex', 'filearchive', 'fa_dupe', 'fa_storage_group' ],
 263                         [ 'renameIndex', 'filearchive', 'fa_notime', 'fa_deleted_timestamp' ],
 264                         [ 'dropPgIndex', 'filearchive', 'fa_nouser' ],
 265                         [ 'addPgIndex', 'filearchive', 'fa_actor_timestamp', '(fa_actor, fa_timestamp)' ],
 266                         [ 'addPgIndex', 'ipblocks', 'ipb_expiry', '(ipb_expiry)' ],
 267                         [ 'addPgIndex', 'ipblocks', 'ipb_timestamp', '(ipb_timestamp)' ],
 268                         [ 'renameIndex', 'text', 'pagecontent_pkey', 'text_pkey' ],
 269                         [ 'changeNullableField', 'text', 'old_text', 'NOT NULL', true ],
 270                         [ 'changeNullableField', 'text', 'old_flags', 'NOT NULL', true ],
 271                         [ 'setDefault', 'oldimage', 'oi_name', '' ],
 272                         [ 'setDefault', 'oldimage', 'oi_archive_name', '' ],
 273                         [ 'setDefault', 'oldimage', 'oi_size', 0 ],
 274                         [ 'setDefault', 'oldimage', 'oi_width', 0 ],
 275                         [ 'setDefault', 'oldimage', 'oi_height', 0 ],
 276                         [ 'setDefault', 'oldimage', 'oi_bits', 0 ],
 277                         [ 'setDefault', 'oldimage', 'oi_name', '' ],
 278                         [ 'changeField', 'oldimage', 'oi_bits', 'INTEGER', '' ],
 279                         [ 'changeField', 'oldimage', 'oi_description_id', 'BIGINT', '' ],
 280                         [ 'changeField', 'oldimage', 'oi_actor', 'BIGINT', '' ],
 281                         [ 'changeField', 'oldimage', 'oi_metadata', 'TEXT', '' ],
 282                         [ 'dropDefault', 'oldimage', 'oi_metadata' ],
 283                         [ 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NOT NULL', true ],
 284                         [ 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NOT NULL', true ],
 285                         [ 'dropFkey', 'oldimage', 'oi_name' ],
 286                         [ 'addPgIndex', 'oldimage', 'oi_actor_timestamp', '(oi_actor, oi_timestamp)' ],
 287                         [ 'dropPgIndex', 'recentchanges', 'rc_timestamp_bot' ],
 288                         [ 'addPgIndex', 'recentchanges', 'rc_ns_actor', '(rc_namespace, rc_actor)' ],
 289                         [ 'addPgIndex', 'recentchanges', 'rc_actor', '(rc_actor, rc_timestamp)' ],
 290                         [ 'dropIndex', 'objectcache', 'keyname', 'patch-objectcache_keyname-pk.sql' ],
 291                         [ 'changeField', 'objectcache', 'value', 'TEXT', '' ],
 292                         [ 'changeNullableField', 'objectcache', 'value', 'NULL', true ],
 293                         [ 'dropFkey', 'ipblocks', 'ipb_user' ],
 294                         [ 'dropFkey', 'ipblocks', 'ipb_parent_block_id' ],
 295                         [ 'setDefault', 'ipblocks', 'ipb_user', 0 ],
 296                         [ 'changeNullableField', 'ipblocks', 'ipb_user', 'NOT NULL', true ],
 297                         [ 'changeNullableField', 'ipblocks', 'ipb_range_start', 'NOT NULL', true ],
 298                         [ 'changeNullableField', 'ipblocks', 'ipb_range_end', 'NOT NULL', true ],
 299                         [ 'changeField', 'ipblocks', 'ipb_by_actor', 'BIGINT', '' ],
 300                         [ 'changeField', 'ipblocks', 'ipb_reason_id', 'BIGINT', '' ],
 301                         [ 'renameIndex', 'archive', 'archive_name_title_timestamp', 'ar_name_title_timestamp' ],
 302                         [ 'dropPgIndex', 'archive', 'archive_actor' ],
 303                         [ 'addPgIndex', 'archive', 'ar_actor_timestamp', '(ar_actor,ar_timestamp)' ],
 304                         [ 'setDefault', 'image', 'img_name', '' ],
 305                         [ 'setDefault', 'image', 'img_size', 0 ],
 306                         [ 'setDefault', 'image', 'img_width', 0 ],
 307                         [ 'setDefault', 'image', 'img_height', 0 ],
 308                         [ 'setDefault', 'image', 'img_bits', 0 ],
 309                         [ 'changeField', 'image', 'img_bits', 'INTEGER', '' ],
 310                         [ 'changeField', 'image', 'img_description_id', 'BIGINT', '' ],
 311                         [ 'changeField', 'image', 'img_actor', 'BIGINT', '' ],
 312                         [ 'changeField', 'image', 'img_metadata', 'TEXT', '' ],
 313                         [ 'dropDefault', 'image', 'img_metadata' ],
 314                         [ 'changeNullableField', 'image', 'img_major_mime', 'NOT NULL', true ],
 315                         [ 'changeNullableField', 'image', 'img_minor_mime', 'NOT NULL', true ],
 316                         [ 'changeNullableField', 'image', 'img_timestamp', 'NOT NULL', true ],
 317                         [ 'renameIndex', 'image', 'img_size_idx', 'img_size' ],
 318                         [ 'renameIndex', 'image', 'img_timestamp_idx', 'img_timestamp' ],
 319                         [ 'addPgIndex', 'image', 'img_actor_timestamp', '(img_actor, img_timestamp)' ],
 320                         [ 'addPgIndex', 'image', 'img_media_mime', '(img_media_type, img_major_mime, img_minor_mime)' ],
 321                         [ 'renameIndex', 'site_identifiers', 'site_ids_site', 'si_site' ],
 322                         [ 'renameIndex', 'site_identifiers', 'site_ids_key', 'si_key' ],
 323                         [ 'changeField', 'recentchanges', 'rc_actor', 'BIGINT', '' ],
 324                         [ 'changeField', 'recentchanges', 'rc_comment_id', 'BIGINT', '' ],
 325                         [ 'changeField', 'recentchanges', 'rc_ip', 'TEXT', '' ],
 326                         [ 'changeField', 'recentchanges', 'rc_namespace', 'INTEGER', '' ],
 327                         [ 'setDefault', 'recentchanges', 'rc_title', '' ],
 328                         [ 'setDefault', 'recentchanges', 'rc_source', '' ],
 329                         [ 'setDefault', 'recentchanges', 'rc_ip', '' ],
 330                         [ 'setDefault', 'recentchanges', 'rc_namespace', 0 ],
 331                         [ 'setDefault', 'recentchanges', 'rc_cur_id', 0 ],
 332                         [ 'setDefault', 'recentchanges', 'rc_this_oldid', 0 ],
 333                         [ 'setDefault', 'recentchanges', 'rc_last_oldid', 0 ],
 334                         [ 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NOT NULL', true ],
 335                         [ 'changeNullableField', 'recentchanges', 'rc_ip', 'NOT NULL', true ],
 336                         [ 'renameIndex', 'recentchanges', 'new_name_timestamp', 'rc_new_name_timestamp', false,
 337                                 'patch-recentchanges-rc_new_name_timestamp.sql' ],
 338                         [ 'changeField', 'archive', 'ar_namespace', 'INTEGER', '' ],
 339                         [ 'setDefault', 'archive', 'ar_namespace', 0 ],
 340                         [ 'setDefault', 'archive', 'ar_title', '' ],
 341                         [ 'changeField', 'archive', 'ar_comment_id', 'BIGINT', '' ],
 342                         [ 'changeField', 'archive', 'ar_actor', 'BIGINT', '' ],
 343                         [ 'renameIndex', 'user', 'user_email_token_idx', 'user_email_token' ],
 344                         [ 'addPgIndex', 'user', 'user_email', '(user_email)' ],
 345                         [ 'addPgIndex', 'user', 'user_name', '(user_name)', true ],
 346                         [ 'changeField', 'page', 'page_namespace', 'INTEGER', '' ],
 347                         [ 'changeNullableField', 'page', 'page_touched', 'NOT NULL', true ],
 348                         [ 'changeField', 'page', 'page_random', 'FLOAT', '' ],
 349                         [ 'renameIndex', 'revision', 'revision_unique', 'rev_page_id' ],
 350                         [ 'renameIndex', 'revision', 'rev_timestamp_idx', 'rev_timestamp' ],
 351                         [ 'addPgIndex', 'revision', 'rev_page_timestamp', '(rev_page,rev_timestamp)' ],
 352                         [ 'changeNullableField', 'user', 'user_touched', 'NOT NULL', true ],
 353
 354                         // 1.37
 355                         [ 'setDefault', 'user', 'user_name', '' ],
 356                         [ 'setDefault', 'user', 'user_token', '' ],
 357                         [ 'setDefault', 'user', 'user_real_name', '' ],
 358                         [ 'setDefault', 'user', 'user_email', '' ],
 359                         [ 'setDefault', 'user', 'user_newpassword', '' ],
 360                         [ 'setDefault', 'user', 'user_password', '' ],
 361                         [ 'changeNullableField', 'user', 'user_token', 'NOT NULL', true ],
 362                         [ 'changeNullableField', 'user', 'user_real_name', 'NOT NULL', true ],
 363                         [ 'changeNullableField', 'user', 'user_email', 'NOT NULL', true ],
 364                         [ 'changeNullableField', 'user', 'user_newpassword', 'NOT NULL', true ],
 365                         [ 'changeNullableField', 'user', 'user_password', 'NOT NULL', true ],
 366                         [ 'dropDefault', 'user', 'user_email' ],
 367                         [ 'dropDefault', 'user', 'user_newpassword' ],
 368                         [ 'dropDefault', 'user', 'user_password' ],
 369                         [ 'dropConstraint', 'user', 'user_name', 'unique' ],
 370                         [ 'addField', 'objectcache', 'modtoken', 'patch-objectcache-modtoken.sql' ],
 371                         [ 'dropFkey', 'revision', 'rev_page' ],
 372                         [ 'changeNullableField', 'revision', 'rev_page', 'NOT NULL', true ],
 373                         [ 'changeField', 'revision', 'rev_comment_id', 'BIGINT', 'rev_comment_id::BIGINT DEFAULT 0' ],
 374                         [ 'changeField', 'revision', 'rev_actor', 'BIGINT', 'rev_actor::BIGINT DEFAULT 0' ],
 375                         [ 'checkIndex', 'rev_page_id', [
 376                                         [ 'rev_page', 'int4_ops', 'btree', 1 ],
 377                                         [ 'rev_id', 'int4_ops', 'btree', 1 ],
 378                                 ],
 379                                 'CREATE INDEX rev_page_id ON revision (rev_page,rev_id)'
 380                         ],
 381                         [ 'addTable', 'searchindex', 'patch-searchindex-table.sql' ],
 382                         [ 'addPgIndex', 'oldimage', 'oi_timestamp', '(oi_timestamp)' ],
 383                         [ 'renameIndex', 'page', 'name_title', 'page_name_title' ],
 384                         [ 'renameIndex', 'change_tag', 'change_tag_rc_tag_id', 'ct_rc_tag_id' ],
 385                         [ 'renameIndex', 'change_tag', 'change_tag_log_tag_id', 'ct_log_tag_id' ],
 386                         [ 'renameIndex', 'change_tag', 'change_tag_rev_tag_id', 'ct_rev_tag_id' ],
 387                         [ 'renameIndex', 'change_tag', 'change_tag_tag_id_id', 'ct_tag_id_id' ],
 388
 389                         // 1.38
 390                         [ 'doConvertDjvuMetadata' ],
 391                         [ 'dropPgField', 'page_restrictions', 'pr_user' ],
 392                         [ 'addTable', 'linktarget', 'patch-linktarget.sql' ],
 393                         [ 'dropIndex', 'revision', 'rev_page_id', 'patch-drop-rev_page_id.sql' ],
 394                         [ 'addField', 'templatelinks', 'tl_target_id', 'patch-templatelinks-target_id.sql' ],
 395
 396                         // 1.39
 397                         [ 'addTable', 'user_autocreate_serial', 'patch-user_autocreate_serial.sql' ],
 398                         [ 'runMaintenance', MigrateRevisionActorTemp::class ],
 399                         [ 'dropTable', 'revision_actor_temp' ],
 400                         [ 'runMaintenance', UpdateRestrictions::class ],
 401                         [ 'dropPgField', 'page', 'page_restrictions' ],
 402                         [ 'migrateTemplatelinks' ],
 403                         [ 'changeNullableField', 'templatelinks', 'tl_target_id', 'NOT NULL', true ],
 404                         [ 'changePrimaryKey', 'templatelinks', [ 'tl_from', 'tl_target_id' ] ],
 405                         [ 'dropField', 'templatelinks', 'tl_title', 'patch-templatelinks-drop-tl_title.sql' ],
 406
 407                         // 1.40
 408                         [ 'addField', 'externallinks', 'el_to_path', 'patch-externallinks-el_to_path.sql' ],
 409
 410                         // 1.41
 411                         [ 'addField', 'user', 'user_is_temp', 'patch-user-user_is_temp.sql' ],
 412                         [ 'runMaintenance', MigrateRevisionCommentTemp::class ],
 413                         [ 'dropTable', 'revision_comment_temp' ],
 414                         [ 'runMaintenance', MigrateExternallinks::class ],
 415                         [ 'modifyField', 'externallinks', 'el_to', 'patch-externallinks-el_to_default.sql' ],
 416                         [ 'addField', 'pagelinks', 'pl_target_id', 'patch-pagelinks-target_id.sql' ],
 417                         [ 'dropField', 'externallinks', 'el_to', 'patch-externallinks-drop-el_to.sql' ],
 418                         [ 'runMaintenance', FixInconsistentRedirects::class ],
 419                         [ 'modifyField', 'image', 'img_size', 'patch-image-img_size_to_bigint.sql' ],
 420                         [ 'modifyField', 'filearchive', 'fa_size', 'patch-filearchive-fa_size_to_bigint.sql' ],
 421                         [ 'modifyField', 'oldimage', 'oi_size', 'patch-oldimage-oi_size_to_bigint.sql' ],
 422                         [ 'modifyField', 'uploadstash', 'us_size', 'patch-uploadstash-us_size_to_bigint.sql' ],
 423
 424                         // 1.42
 425                         [ 'addField', 'user_autocreate_serial', 'uas_year', 'patch-user_autocreate_serial-uas_year.sql' ],
 426                         [ 'addTable', 'block_target', 'patch-block_target.sql' ],
 427                         [ 'dropIndex', 'categorylinks', 'cl_collation_ext', 'patch-drop-cl_collation_ext.sql' ],
 428                         [ 'runMaintenance', PopulateUserIsTemp::class ],
 429                         [ 'dropIndex', 'sites', 'site_type', 'patch-sites-drop_indexes.sql' ],
 430                         [ 'dropIndex', 'iwlinks', 'iwl_prefix_from_title', 'patch-iwlinks-drop-iwl_prefix_from_title.sql' ],
 431
 432                         // 1.43
 433                         [ 'migratePagelinks' ],
 434                         [ 'dropDefault', 'revision', 'rev_actor' ],
 435                         [ 'dropDefault', 'revision', 'rev_comment_id' ],
 436                         [ 'changeField', 'revision', 'rev_id', 'BIGINT', '' ],
 437                         [ 'changeField', 'revision', 'rev_parent_id', 'BIGINT', '' ],
 438                         [ 'changeField', 'recentchanges', 'rc_id', 'BIGINT', '' ],
 439                         [ 'changeField', 'change_tag', 'ct_rc_id', 'BIGINT', '' ],
 440                         [ 'runMaintenance', \MigrateBlocks::class ],
 441                         [ 'dropTable', 'ipblocks' ],
 442                         [ 'dropField', 'pagelinks', 'pl_title', 'patch-pagelinks-drop-pl_title.sql' ],
 443                         [ 'addPostDatabaseUpdateMaintenance', FixAutoblockLogTitles::class ],
 444                         [ 'migrateSearchindex' ],
 445
 446                         // 1.44
 447                         [ 'addTable', 'file', 'patch-file.sql' ],
 448                 ];
 449         }
 450
 451         protected function getInitialUpdateKeys() {
 452                 return [
 453                         'filearchive-fa_major_mime-patch-fa_major_mime-chemical.sql',
 454                         'image-img_major_mime-patch-img_major_mime-chemical.sql',
 455                         'oldimage-oi_major_mime-patch-oi_major_mime-chemical.sql',
 456                         'user_groups-ug_group-patch-ug_group-length-increase-255.sql',
 457                         'user_former_groups-ufg_group-patch-ufg_group-length-increase-255.sql',
 458                         'user_properties-up_property-patch-up_property.sql',
 459                 ];
 460         }
 461
 462         protected function describeTable( $table ) {
 463                 $q = <<<END
 464 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 465         WHERE pg_class.relnamespace = pg_namespace.oid
 466                 AND attrelid=pg_class.oid AND attnum > 0
 467                 AND relname=%s AND nspname=%s
 468 END;
 469                 $res = $this->db->query(
 470                         sprintf( $q,
 471                                 $this->db->addQuotes( $table ),
 472                                 $this->db->addQuotes( $this->db->getCoreSchema() )
 473                         ),
 474                         __METHOD__
 475                 );
 476                 if ( !$res ) {
 477                         return null;
 478                 }
 479
 480                 $cols = [];
 481                 foreach ( $res as $r ) {
 482                         $cols[] = [
 483                                 "name" => $r[0],
 484                                 "ord" => $r[1],
 485                         ];
 486                 }
 487
 488                 return $cols;
 489         }
 490
 491         protected function describeIndex( $idx ) {
 492                 // first fetch the key (which is a list of columns ords) and
 493                 // the table the index applies to (an oid)
 494                 $q = <<<END
 495 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 496         WHERE nspname=%s
 497                 AND pg_class.relnamespace = pg_namespace.oid
 498                 AND relname=%s
 499                 AND indexrelid=pg_class.oid
 500 END;
 501                 $res = $this->db->query(
 502                         sprintf(
 503                                 $q,
 504                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 505                                 $this->db->addQuotes( $idx )
 506                         ),
 507                         __METHOD__
 508                 );
 509                 if ( !$res ) {
 510                         return null;
 511                 }
 512                 $r = $res->fetchRow();
 513                 if ( !$r ) {
 514                         return null;
 515                 }
 516
 517                 $indkey = $r[0];
 518                 $relid = intval( $r[1] );
 519                 $indkeys = explode( ' ', $indkey );
 520
 521                 $colnames = [];
 522                 foreach ( $indkeys as $rid ) {
 523                         $query = <<<END
 524 SELECT attname FROM pg_class, pg_attribute
 525         WHERE attrelid=$relid
 526                 AND attnum=%d
 527                 AND attrelid=pg_class.oid
 528 END;
 529                         $r2 = $this->db->query( sprintf( $query, $rid ), __METHOD__ );
 530                         if ( !$r2 ) {
 531                                 return null;
 532                         }
 533                         $row2 = $r2->fetchRow();
 534                         if ( !$row2 ) {
 535                                 return null;
 536                         }
 537                         $colnames[] = $row2[0];
 538                 }
 539
 540                 return $colnames;
 541         }
 542
 543         protected function fkeyDeltype( $fkey ) {
 544                 $q = <<<END
 545 SELECT confdeltype FROM pg_constraint, pg_namespace
 546         WHERE connamespace=pg_namespace.oid
 547                 AND nspname=%s
 548                 AND conname=%s;
 549 END;
 550                 $r = $this->db->query(
 551                         sprintf(
 552                                 $q,
 553                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 554                                 $this->db->addQuotes( $fkey )
 555                         ),
 556                         __METHOD__
 557                 );
 558                 $row = $r->fetchRow();
 559                 return $row ? $row[0] : null;
 560         }
 561
 562         protected function ruleDef( $table, $rule ) {
 563                 $q = <<<END
 564 SELECT definition FROM pg_rules
 565         WHERE schemaname = %s
 566                 AND tablename = %s
 567                 AND rulename = %s
 568 END;
 569                 $r = $this->db->query(
 570                         sprintf(
 571                                 $q,
 572                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 573                                 $this->db->addQuotes( $table ),
 574                                 $this->db->addQuotes( $rule )
 575                         ),
 576                         __METHOD__
 577                 );
 578                 $row = $r->fetchRow();
 579                 if ( !$row ) {
 580                         return null;
 581                 }
 582                 $d = $row[0];
 583
 584                 return $d;
 585         }
 586
 587         protected function addSequence( $table, $pkey, $ns ) {
 588                 if ( !$this->db->sequenceExists( $ns ) ) {
 589                         $this->output( "Creating sequence $ns\n" );
 590                         if ( $pkey !== false ) {
 591                                 $table = $this->db->addIdentifierQuotes( $table );
 592                                 $this->db->query( "CREATE SEQUENCE $ns OWNED BY $table.$pkey", __METHOD__ );
 593                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 594                         } else {
 595                                 $this->db->query( "CREATE SEQUENCE $ns", __METHOD__ );
 596                         }
 597                 }
 598         }
 599
 600         protected function dropSequence( $table, $ns ) {
 601                 if ( $this->db->sequenceExists( $ns ) ) {
 602                         $this->output( "Dropping sequence $ns\n" );
 603                         $this->db->query( "DROP SEQUENCE $ns CASCADE", __METHOD__ );
 604                 }
 605         }
 606
 607         protected function renameSequence( $old, $new ) {
 608                 if ( $this->db->sequenceExists( $new ) ) {
 609                         $this->output( "...sequence $new already exists.\n" );
 610
 611                         return;
 612                 }
 613                 if ( $this->db->sequenceExists( $old ) ) {
 614                         $this->output( "Renaming sequence $old to $new\n" );
 615                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new", __METHOD__ );
 616                 }
 617         }
 618
 619         protected function setSequenceOwner( $table, $pkey, $seq ) {
 620                 if ( $this->db->sequenceExists( $seq ) ) {
 621                         $this->output( "Setting sequence $seq owner to $table.$pkey\n" );
 622                         $table = $this->db->addIdentifierQuotes( $table );
 623                         $this->db->query( "ALTER SEQUENCE $seq OWNED BY $table.$pkey", __METHOD__ );
 624                 }
 625         }
 626
 627         protected function renameTable( $old, $new, $patch = false ) {
 628                 if ( $this->db->tableExists( $old, __METHOD__ ) ) {
 629                         $this->output( "Renaming table $old to $new\n" );
 630                         $old = $this->db->addIdentifierQuotes( $old );
 631                         $new = $this->db->addIdentifierQuotes( $new );
 632                         $this->db->query( "ALTER TABLE $old RENAME TO $new", __METHOD__ );
 633                         if ( $patch !== false ) {
 634                                 $this->applyPatch( $patch );
 635                         }
 636                 }
 637         }
 638
 639         protected function renameIndex(
 640                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 641         ) {
 642                 // First requirement: the table must exist
 643                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 644                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 645
 646                         return true;
 647                 }
 648
 649                 // Second requirement: the new index must be missing
 650                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 651                         $this->output( "...index $new already set on $table table.\n" );
 652                         if ( !$skipBothIndexExistWarning
 653                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 654                         ) {
 655                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 656                                         "renamed into $new (which also exists).\n" .
 657                                         "            $old should be manually removed if not needed anymore.\n" );
 658                         }
 659
 660                         return true;
 661                 }
 662
 663                 // Third requirement: the old index must exist
 664                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 665                         $this->output( "...skipping: index $old doesn't exist.\n" );
 666
 667                         return true;
 668                 }
 669
 670                 $this->db->query( "ALTER INDEX $old RENAME TO $new", __METHOD__ );
 671                 return true;
 672         }
 673
 674         protected function dropPgField( $table, $field ) {
 675                 $fi = $this->db->fieldInfo( $table, $field );
 676                 if ( $fi === null ) {
 677                         $this->output( "...$table table does not contain $field field.\n" );
 678                 } else {
 679                         $this->output( "Dropping column '$table.$field'\n" );
 680                         $table = $this->db->addIdentifierQuotes( $table );
 681                         $this->db->query( "ALTER TABLE $table DROP COLUMN $field", __METHOD__ );
 682                 }
 683         }
 684
 685         protected function addPgField( $table, $field, $type ) {
 686                 $fi = $this->db->fieldInfo( $table, $field );
 687                 if ( $fi !== null ) {
 688                         $this->output( "...column '$table.$field' already exists\n" );
 689                 } else {
 690                         $this->output( "Adding column '$table.$field'\n" );
 691                         $table = $this->db->addIdentifierQuotes( $table );
 692                         $this->db->query( "ALTER TABLE $table ADD $field $type", __METHOD__ );
 693                 }
 694         }
 695
 696         protected function changeField( $table, $field, $newtype, $default ) {
 697                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 698                         $this->output( "...$table table does not exist, skipping default change.\n" );
 699                         return;
 700                 }
 701                 $fi = $this->db->fieldInfo( $table, $field );
 702                 if ( $fi === null ) {
 703                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 704                         exit( 1 );
 705                 }
 706
 707                 if ( $fi->type() === strtolower( $newtype ) ) {
 708                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 709                 } else {
 710                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 711                         $table = $this->db->addIdentifierQuotes( $table );
 712                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 713                         if ( strlen( $default ) ) {
 714                                 $res = [];
 715                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 716                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 717                                         $this->db->query( $sqldef, __METHOD__ );
 718                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 719                                 }
 720                                 $sql .= " USING $default";
 721                         }
 722                         $this->db->query( $sql, __METHOD__ );
 723                 }
 724         }
 725
 726         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 727                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 728                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 729                 $fi = $this->db->fieldInfo( $table, $field );
 730                 if ( $fi === null ) {
 731                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 732                         exit( 1 );
 733                 }
 734
 735                 if ( $fi->type() === $newtype ) {
 736                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 737                 } else {
 738                         $this->output( "Purging data from cache table '$table'\n" );
 739                         $table = $this->db->addIdentifierQuotes( $table );
 740                         $this->db->query( "DELETE from $table", __METHOD__ );
 741                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 742                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 743                         if ( strlen( $default ) ) {
 744                                 $res = [];
 745                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 746                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 747                                         $this->db->query( $sqldef, __METHOD__ );
 748                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 749                                 }
 750                                 $sql .= " USING $default";
 751                         }
 752                         $this->db->query( $sql, __METHOD__ );
 753                 }
 754         }
 755
 756         protected function setDefault( $table, $field, $default ) {
 757                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 758                         $this->output( "...$table table does not exist, skipping default change.\n" );
 759                         return;
 760                 }
 761                 $info = $this->db->fieldInfo( $table, $field );
 762                 if ( $info && $info->defaultValue() !== $default ) {
 763                         $this->output( "Changing '$table.$field' default value\n" );
 764                         $table = $this->db->addIdentifierQuotes( $table );
 765                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT "
 766                                 . $this->db->addQuotes( $default ), __METHOD__ );
 767                 }
 768         }
 769
 770         /**
 771          * Drop a default value from a field
 772          * @since 1.32
 773          * @param string $table
 774          * @param string $field
 775          */
 776         protected function dropDefault( $table, $field ) {
 777                 $info = $this->db->fieldInfo( $table, $field );
 778                 if ( $info->defaultValue() !== false ) {
 779                         $this->output( "Removing '$table.$field' default value\n" );
 780                         $table = $this->db->addIdentifierQuotes( $table );
 781                         $this->db->query( "ALTER TABLE $table ALTER $field DROP DEFAULT", __METHOD__ );
 782                 }
 783         }
 784
 785         protected function changeNullableField( $table, $field, $null, $update = false ) {
 786                 $fi = $this->db->fieldInfo( $table, $field );
 787                 if ( $fi === null ) {
 788                         return;
 789                 }
 790                 if ( $fi->isNullable() ) {
 791                         # # It's NULL - does it need to be NOT NULL?
 792                         if ( $null === 'NOT NULL' ) {
 793                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 794                                 $table = $this->db->addIdentifierQuotes( $table );
 795                                 if ( $update ) {
 796                                         $this->db->query( "UPDATE $table SET $field = DEFAULT WHERE $field IS NULL", __METHOD__ );
 797                                 }
 798                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL", __METHOD__ );
 799                         } else {
 800                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 801                         }
 802                 } else {
 803                         # # It's NOT NULL - does it need to be NULL?
 804                         if ( $null === 'NULL' ) {
 805                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 806                                 $table = $this->db->addIdentifierQuotes( $table );
 807                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL", __METHOD__ );
 808                         } else {
 809                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 810                         }
 811                 }
 812         }
 813
 814         protected function addPgIndex( $table, $index, $type, $unique = false ) {
 815                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 816                         $this->output( "...$table table does not exist, skipping index.\n" );
 817                 } elseif ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 818                         $this->output( "...index '$index' on table '$table' already exists\n" );
 819                 } else {
 820                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 821                         $table = $this->db->addIdentifierQuotes( $table );
 822                         $unique = $unique ? 'UNIQUE' : '';
 823                         $this->db->query( "CREATE $unique INDEX $index ON $table $type", __METHOD__ );
 824                 }
 825         }
 826
 827         protected function addPgExtIndex( $table, $index, $type ) {
 828                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 829                         $this->output( "...index '$index' on table '$table' already exists\n" );
 830                 } elseif ( preg_match( '/^\(/', $type ) ) {
 831                         $this->output( "Creating index '$index' on table '$table'\n" );
 832                         $table = $this->db->addIdentifierQuotes( $table );
 833                         $this->db->query( "CREATE INDEX $index ON $table $type", __METHOD__ );
 834                 } else {
 835                         $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 836                 }
 837         }
 838
 839         protected function dropFkey( $table, $field ) {
 840                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 841                         $this->output( "...$table table does not exist, skipping constraint change.\n" );
 842                         return;
 843                 }
 844                 $fi = $this->db->fieldInfo( $table, $field );
 845                 if ( $fi === null ) {
 846                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 847                                 "Please report this.\n" );
 848                         return;
 849                 }
 850
 851                 if ( $this->dropConstraint( $table, $field, 'foreignkey', $fi->conname() ) ) {
 852                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
 853                 } else {
 854                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
 855                 }
 856         }
 857
 858         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 859                 $fi = $this->db->fieldInfo( $table, $field );
 860                 if ( $fi === null ) {
 861                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 862                                 "Please report this.\n" );
 863
 864                         return;
 865                 }
 866                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 867                         return;
 868                 }
 869                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 870
 871                 $conname = $fi->conname();
 872                 $conclause = "CONSTRAINT \"$conname\"";
 873
 874                 if ( !$this->dropConstraint( $table, $field, 'foreignkey', $conname ) ) {
 875                         $this->output( "Column '$table.$field' does not have a foreign key " .
 876                                 "constraint, will be added\n" );
 877                         $conclause = "";
 878                 }
 879
 880                 $command =
 881                         "ALTER TABLE $table ADD $conclause " .
 882                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 883                 $this->db->query( $command, __METHOD__ );
 884         }
 885
 886         protected function dropPgIndex( $table, $index ) {
 887                 if ( $this->db->indexExists( $table, $index, __METHOD__ ) ) {
 888                         $this->output( "Dropping obsolete index '$index'\n" );
 889                         $this->db->query( "DROP INDEX \"" . $index . "\"", __METHOD__ );
 890                 }
 891         }
 892
 893         protected function checkIndex( $index, $should_be, $good_def ) {
 894                 $pu = $this->db->indexAttributes( $index );
 895                 if ( $pu && $pu != $should_be ) {
 896                         $this->output( "Dropping obsolete version of index '$index'\n" );
 897                         $this->db->query( "DROP INDEX \"" . $index . "\"", __METHOD__ );
 898                         $pu = [];
 899                 } else {
 900                         $this->output( "...no need to drop index '$index'\n" );
 901                 }
 902
 903                 if ( !$pu ) {
 904                         $this->output( "Creating index '$index'\n" );
 905                         $this->db->query( $good_def, __METHOD__ );
 906                 } else {
 907                         $this->output( "...index '$index' exists\n" );
 908                 }
 909         }
 910
 911         protected function changePrimaryKey( $table, $shouldBe, $constraintName = null ) {
 912                 // https://wiki.postgresql.org/wiki/Retrieve_primary_key_columns
 913                 $result = $this->db->query(
 914                         "SELECT a.attname as column " .
 915                                 "FROM pg_index i " .
 916                                 "JOIN pg_attribute a ON a.attrelid = i.indrelid " .
 917                                 "AND a.attnum = ANY(i.indkey) " .
 918                                 "WHERE i.indrelid = '\"$table\"'::regclass " .
 919                                 "AND i.indisprimary",
 920                         __METHOD__
 921                 );
 922                 $currentColumns = [];
 923                 foreach ( $result as $row ) {
 924                         $currentColumns[] = $row->column;
 925                 }
 926
 927                 if ( $currentColumns == $shouldBe ) {
 928                         $this->output( "...no need to change primary key of '$table'\n" );
 929                         return true;
 930                 }
 931
 932                 $this->dropConstraint( $table, '', 'primary', $constraintName );
 933
 934                 $table = $this->db->addIdentifierQuotes( $table );
 935                 $this->db->query(
 936                         "ALTER TABLE $table" .
 937                         " ADD PRIMARY KEY (" . implode( ',', $shouldBe ) . ');',
 938                         __METHOD__
 939                 );
 940         }
 941
 942         /**
 943          * Drop generic constraint. If the constraint was created with a custom name,
 944          * then the name must be queried and supplied as $conname, otherwise standard
 945          * system suffixes and format would be assumed.
 946          *
 947          * @param string $table
 948          * @param string $field
 949          * @param string $type
 950          * @param string|null $conname
 951          * @return bool
 952          */
 953         protected function dropConstraint( $table, $field, $type, $conname = null ) {
 954                 if ( $conname === null ) {
 955                         if ( $type == 'primary' ) {
 956                                 $conname = "{$table}_pkey";
 957                         } else {
 958                                 $map = [ 'unique' => 'key', 'check' => 'check', 'foreignkey' => 'fkey' ];
 959                                 $conname = "{$table}_{$field}_{$map[$type]}";
 960                         }
 961                 }
 962
 963                 if ( $this->db->constraintExists( $table, $conname ) ) {
 964                         $table = $this->db->addIdentifierQuotes( $table );
 965                         $this->db->query(
 966                                 "ALTER TABLE $table DROP CONSTRAINT $conname;",
 967                                 __METHOD__
 968                         );
 969
 970                         return true;
 971                 }
 972
 973                 return false;
 974         }
 975
 976         /**
 977          * Replaces unique index with primary key,modifies si_title length
 978          *
 979          * @since 1.43
 980          * @return void
 981          */
 982         protected function migrateSearchindex() {
 983                 $updateKey = 'searchindex-pk-titlelength';
 984                 if ( !$this->tableExists( 'searchindex' ) ) {
 985                         return;
 986                 }
 987
 988                 $primaryIndexExists = $this->db->indexExists( 'searchindex', 'searchindex_pkey' );
 989                 if ( $this->updateRowExists( $updateKey ) || ( $primaryIndexExists ) ) {
 990                         $this->output( "...searchindex table has already been migrated.\n" );
 991                         if ( !$this->updateRowExists( $updateKey ) ) {
 992                                 $this->insertUpdateRow( $updateKey );
 993                         }
 994                         return;
 995                 }
 996
 997                 $apply = $this->applyPatch( 'patch-searchindex-pk-titlelength.sql', false, '...migrating searchindex table' );
 998
 999                 if ( $apply ) {
1000                         $this->insertUpdateRow( $updateKey );
1001                 }
1002         }
1003 }