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