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
  70                         # new tables
  71                         array( 'addTable', 'category', 'patch-category.sql' ),
  72                         array( 'addTable', 'page', 'patch-page.sql' ),
  73                         array( 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ),
  74                         array( 'addTable', 'page_props', 'patch-page_props.sql' ),
  75                         array( 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ),
  76                         array( 'addTable', 'profiling', 'patch-profiling.sql' ),
  77                         array( 'addTable', 'protected_titles', 'patch-protected_titles.sql' ),
  78                         array( 'addTable', 'redirect', 'patch-redirect.sql' ),
  79                         array( 'addTable', 'updatelog', 'patch-updatelog.sql' ),
  80                         array( 'addTable', 'change_tag', 'patch-change_tag.sql' ),
  81                         array( 'addTable', 'tag_summary', 'patch-tag_summary.sql' ),
  82                         array( 'addTable', 'valid_tag', 'patch-valid_tag.sql' ),
  83                         array( 'addTable', 'user_properties', 'patch-user_properties.sql' ),
  84                         array( 'addTable', 'log_search', 'patch-log_search.sql' ),
  85                         array( 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ),
  86                         array( 'addTable', 'iwlinks', 'patch-iwlinks.sql' ),
  87                         array( 'addTable', 'msg_resource', 'patch-msg_resource.sql' ),
  88                         array( 'addTable', 'msg_resource_links', 'patch-msg_resource_links.sql' ),
  89                         array( 'addTable', 'module_deps', 'patch-module_deps.sql' ),
  90                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
  91                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
  92                         array( 'addTable', 'sites', 'patch-sites.sql' ),
  93
  94                         # Needed before new field
  95                         array( 'convertArchive2' ),
  96
  97                         # new fields
  98                         array( 'addPgField', 'updatelog', 'ul_value', 'TEXT' ),
  99                         array( 'addPgField', 'archive', 'ar_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 100                         array( 'addPgField', 'archive', 'ar_len', 'INTEGER' ),
 101                         array( 'addPgField', 'archive', 'ar_page_id', 'INTEGER' ),
 102                         array( 'addPgField', 'archive', 'ar_parent_id', 'INTEGER' ),
 103                         array( 'addPgField', 'archive', 'ar_content_model', 'TEXT' ),
 104                         array( 'addPgField', 'archive', 'ar_content_format', 'TEXT' ),
 105                         array( 'addPgField', 'categorylinks', 'cl_sortkey_prefix', "TEXT NOT NULL DEFAULT ''" ),
 106                         array( 'addPgField', 'categorylinks', 'cl_collation', "TEXT NOT NULL DEFAULT 0" ),
 107                         array( 'addPgField', 'categorylinks', 'cl_type', "TEXT NOT NULL DEFAULT 'page'" ),
 108                         array( 'addPgField', 'image', 'img_sha1', "TEXT NOT NULL DEFAULT ''" ),
 109                         array( 'addPgField', 'ipblocks', 'ipb_allow_usertalk', 'SMALLINT NOT NULL DEFAULT 0' ),
 110                         array( 'addPgField', 'ipblocks', 'ipb_anon_only', 'SMALLINT NOT NULL DEFAULT 0' ),
 111                         array( 'addPgField', 'ipblocks', 'ipb_by_text', "TEXT NOT NULL DEFAULT ''" ),
 112                         array( 'addPgField', 'ipblocks', 'ipb_block_email', 'SMALLINT NOT NULL DEFAULT 0' ),
 113                         array( 'addPgField', 'ipblocks', 'ipb_create_account', 'SMALLINT NOT NULL DEFAULT 1' ),
 114                         array( 'addPgField', 'ipblocks', 'ipb_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 115                         array( 'addPgField', 'ipblocks', 'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ),
 116                         array( 'addPgField', 'ipblocks', 'ipb_parent_block_id',
 117                                 'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ' .
 118                                 'ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ),
 119                         array( 'addPgField', 'filearchive', 'fa_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 120                         array( 'addPgField', 'filearchive', 'fa_sha1', "TEXT NOT NULL DEFAULT ''" ),
 121                         array( 'addPgField', 'logging', 'log_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 122                         array( 'addPgField', 'logging', 'log_id',
 123                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ),
 124                         array( 'addPgField', 'logging', 'log_params', 'TEXT' ),
 125                         array( 'addPgField', 'mwuser', 'user_editcount', 'INTEGER' ),
 126                         array( 'addPgField', 'mwuser', 'user_newpass_time', 'TIMESTAMPTZ' ),
 127                         array( 'addPgField', 'oldimage', 'oi_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 128                         array( 'addPgField', 'oldimage', 'oi_major_mime', "TEXT NOT NULL DEFAULT 'unknown'" ),
 129                         array( 'addPgField', 'oldimage', 'oi_media_type', 'TEXT' ),
 130                         array( 'addPgField', 'oldimage', 'oi_metadata', "BYTEA NOT NULL DEFAULT ''" ),
 131                         array( 'addPgField', 'oldimage', 'oi_minor_mime', "TEXT NOT NULL DEFAULT 'unknown'" ),
 132                         array( 'addPgField', 'oldimage', 'oi_sha1', "TEXT NOT NULL DEFAULT ''" ),
 133                         array( 'addPgField', 'page', 'page_content_model', 'TEXT' ),
 134                         array( 'addPgField', 'page_restrictions', 'pr_id',
 135                                 "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ),
 136                         array( 'addPgField', 'profiling', 'pf_memory', 'NUMERIC(18,10) NOT NULL DEFAULT 0' ),
 137                         array( 'addPgField', 'recentchanges', 'rc_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 138                         array( 'addPgField', 'recentchanges', 'rc_log_action', 'TEXT' ),
 139                         array( 'addPgField', 'recentchanges', 'rc_log_type', 'TEXT' ),
 140                         array( 'addPgField', 'recentchanges', 'rc_logid', 'INTEGER NOT NULL DEFAULT 0' ),
 141                         array( 'addPgField', 'recentchanges', 'rc_new_len', 'INTEGER' ),
 142                         array( 'addPgField', 'recentchanges', 'rc_old_len', 'INTEGER' ),
 143                         array( 'addPgField', 'recentchanges', 'rc_params', 'TEXT' ),
 144                         array( 'addPgField', 'redirect', 'rd_interwiki', 'TEXT NULL' ),
 145                         array( 'addPgField', 'redirect', 'rd_fragment', 'TEXT NULL' ),
 146                         array( 'addPgField', 'revision', 'rev_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 147                         array( 'addPgField', 'revision', 'rev_len', 'INTEGER' ),
 148                         array( 'addPgField', 'revision', 'rev_parent_id', 'INTEGER DEFAULT NULL' ),
 149                         array( 'addPgField', 'revision', 'rev_content_model', 'TEXT' ),
 150                         array( 'addPgField', 'revision', 'rev_content_format', 'TEXT' ),
 151                         array( 'addPgField', 'site_stats', 'ss_active_users', "INTEGER DEFAULT '-1'" ),
 152                         array( 'addPgField', 'user_newtalk', 'user_last_timestamp', 'TIMESTAMPTZ' ),
 153                         array( 'addPgField', 'logging', 'log_user_text', "TEXT NOT NULL DEFAULT ''" ),
 154                         array( 'addPgField', 'logging', 'log_page', 'INTEGER' ),
 155                         array( 'addPgField', 'interwiki', 'iw_api', "TEXT NOT NULL DEFAULT ''" ),
 156                         array( 'addPgField', 'interwiki', 'iw_wikiid', "TEXT NOT NULL DEFAULT ''" ),
 157                         array( 'addPgField', 'revision', 'rev_sha1', "TEXT NOT NULL DEFAULT ''" ),
 158                         array( 'addPgField', 'archive', 'ar_sha1', "TEXT NOT NULL DEFAULT ''" ),
 159                         array( 'addPgField', 'uploadstash', 'us_chunk_inx', "INTEGER NULL" ),
 160                         array( 'addPgField', 'job', 'job_timestamp', "TIMESTAMPTZ" ),
 161                         array( 'addPgField', 'job', 'job_random', "INTEGER NOT NULL DEFAULT 0" ),
 162                         array( 'addPgField', 'job', 'job_attempts', "INTEGER NOT NULL DEFAULT 0" ),
 163                         array( 'addPgField', 'job', 'job_token', "TEXT NOT NULL DEFAULT ''" ),
 164                         array( 'addPgField', 'job', 'job_token_timestamp', "TIMESTAMPTZ" ),
 165                         array( 'addPgField', 'job', 'job_sha1', "TEXT NOT NULL DEFAULT ''" ),
 166                         array( 'addPgField', 'archive', 'ar_id',
 167                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('archive_ar_id_seq')" ),
 168                         array( 'addPgField', 'externallinks', 'el_id',
 169                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('externallinks_el_id_seq')" ),
 170
 171                         # type changes
 172                         array( 'changeField', 'archive', 'ar_deleted', 'smallint', '' ),
 173                         array( 'changeField', 'archive', 'ar_minor_edit', 'smallint',
 174                                 'ar_minor_edit::smallint DEFAULT 0' ),
 175                         array( 'changeField', 'filearchive', 'fa_deleted', 'smallint', '' ),
 176                         array( 'changeField', 'filearchive', 'fa_height', 'integer', '' ),
 177                         array( 'changeField', 'filearchive', 'fa_metadata', 'bytea', "decode(fa_metadata,'escape')" ),
 178                         array( 'changeField', 'filearchive', 'fa_size', 'integer', '' ),
 179                         array( 'changeField', 'filearchive', 'fa_width', 'integer', '' ),
 180                         array( 'changeField', 'filearchive', 'fa_storage_group', 'text', '' ),
 181                         array( 'changeField', 'filearchive', 'fa_storage_key', 'text', '' ),
 182                         array( 'changeField', 'image', 'img_metadata', 'bytea', "decode(img_metadata,'escape')" ),
 183                         array( 'changeField', 'image', 'img_size', 'integer', '' ),
 184                         array( 'changeField', 'image', 'img_width', 'integer', '' ),
 185                         array( 'changeField', 'image', 'img_height', 'integer', '' ),
 186                         array( 'changeField', 'interwiki', 'iw_local', 'smallint', 'iw_local::smallint' ),
 187                         array( 'changeField', 'interwiki', 'iw_trans', 'smallint', 'iw_trans::smallint DEFAULT 0' ),
 188                         array( 'changeField', 'ipblocks', 'ipb_auto', 'smallint', 'ipb_auto::smallint DEFAULT 0' ),
 189                         array( 'changeField', 'ipblocks', 'ipb_anon_only', 'smallint',
 190                                 "CASE WHEN ipb_anon_only=' ' THEN 0 ELSE ipb_anon_only::smallint END DEFAULT 0" ),
 191                         array( 'changeField', 'ipblocks', 'ipb_create_account', 'smallint',
 192                                 "CASE WHEN ipb_create_account=' ' THEN 0 ELSE ipb_create_account::smallint END DEFAULT 1" ),
 193                         array( 'changeField', 'ipblocks', 'ipb_enable_autoblock', 'smallint',
 194                                 "CASE WHEN ipb_enable_autoblock=' ' THEN 0 ELSE ipb_enable_autoblock::smallint END DEFAULT 1" ),
 195                         array( 'changeField', 'ipblocks', 'ipb_block_email', 'smallint',
 196                                 "CASE WHEN ipb_block_email=' ' THEN 0 ELSE ipb_block_email::smallint END DEFAULT 0" ),
 197                         array( 'changeField', 'ipblocks', 'ipb_address', 'text', 'ipb_address::text' ),
 198                         array( 'changeField', 'ipblocks', 'ipb_deleted', 'smallint', 'ipb_deleted::smallint DEFAULT 0' ),
 199                         array( 'changeField', 'mwuser', 'user_token', 'text', '' ),
 200                         array( 'changeField', 'mwuser', 'user_email_token', 'text', '' ),
 201                         array( 'changeField', 'objectcache', 'keyname', 'text', '' ),
 202                         array( 'changeField', 'oldimage', 'oi_height', 'integer', '' ),
 203                         array( 'changeField', 'oldimage', 'oi_metadata', 'bytea', "decode(img_metadata,'escape')" ),
 204                         array( 'changeField', 'oldimage', 'oi_size', 'integer', '' ),
 205                         array( 'changeField', 'oldimage', 'oi_width', 'integer', '' ),
 206                         array( 'changeField', 'page', 'page_is_redirect', 'smallint',
 207                                 'page_is_redirect::smallint DEFAULT 0' ),
 208                         array( 'changeField', 'page', 'page_is_new', 'smallint', 'page_is_new::smallint DEFAULT 0' ),
 209                         array( 'changeField', 'querycache', 'qc_value', 'integer', '' ),
 210                         array( 'changeField', 'querycachetwo', 'qcc_value', 'integer', '' ),
 211                         array( 'changeField', 'recentchanges', 'rc_bot', 'smallint', 'rc_bot::smallint DEFAULT 0' ),
 212                         array( 'changeField', 'recentchanges', 'rc_deleted', 'smallint', '' ),
 213                         array( 'changeField', 'recentchanges', 'rc_minor', 'smallint', 'rc_minor::smallint DEFAULT 0' ),
 214                         array( 'changeField', 'recentchanges', 'rc_new', 'smallint', 'rc_new::smallint DEFAULT 0' ),
 215                         array( 'changeField', 'recentchanges', 'rc_type', 'smallint', 'rc_type::smallint DEFAULT 0' ),
 216                         array( 'changeField', 'recentchanges', 'rc_patrolled', 'smallint',
 217                                 'rc_patrolled::smallint DEFAULT 0' ),
 218                         array( 'changeField', 'revision', 'rev_deleted', 'smallint', 'rev_deleted::smallint DEFAULT 0' ),
 219                         array( 'changeField', 'revision', 'rev_minor_edit', 'smallint',
 220                                 'rev_minor_edit::smallint DEFAULT 0' ),
 221                         array( 'changeField', 'templatelinks', 'tl_namespace', 'smallint', 'tl_namespace::smallint' ),
 222                         array( 'changeField', 'user_newtalk', 'user_ip', 'text', 'host(user_ip)' ),
 223                         array( 'changeField', 'uploadstash', 'us_image_bits', 'smallint', '' ),
 224                         array( 'changeField', 'profiling', 'pf_time', 'float', '' ),
 225                         array( 'changeField', 'profiling', 'pf_memory', 'float', '' ),
 226
 227                         # null changes
 228                         array( 'changeNullableField', 'oldimage', 'oi_bits', 'NULL' ),
 229                         array( 'changeNullableField', 'oldimage', 'oi_timestamp', 'NULL' ),
 230                         array( 'changeNullableField', 'oldimage', 'oi_major_mime', 'NULL' ),
 231                         array( 'changeNullableField', 'oldimage', 'oi_minor_mime', 'NULL' ),
 232                         array( 'changeNullableField', 'image', 'img_metadata', 'NOT NULL' ),
 233                         array( 'changeNullableField', 'filearchive', 'fa_metadata', 'NOT NULL' ),
 234                         array( 'changeNullableField', 'recentchanges', 'rc_cur_id', 'NULL' ),
 235
 236                         array( 'checkOiDeleted' ),
 237
 238                         # New indexes
 239                         array( 'addPgIndex', 'archive', 'archive_user_text', '(ar_user_text)' ),
 240                         array( 'addPgIndex', 'image', 'img_sha1', '(img_sha1)' ),
 241                         array( 'addPgIndex', 'ipblocks', 'ipb_parent_block_id', '(ipb_parent_block_id)' ),
 242                         array( 'addPgIndex', 'oldimage', 'oi_sha1', '(oi_sha1)' ),
 243                         array( 'addPgIndex', 'page', 'page_mediawiki_title', '(page_title) WHERE page_namespace = 8' ),
 244                         array( 'addPgIndex', 'pagelinks', 'pagelinks_title', '(pl_title)' ),
 245                         array( 'addPgIndex', 'page_props', 'pp_propname_page', '(pp_propname, pp_page)' ),
 246                         array( 'addPgIndex', 'revision', 'rev_text_id_idx', '(rev_text_id)' ),
 247                         array( 'addPgIndex', 'recentchanges', 'rc_timestamp_bot', '(rc_timestamp) WHERE rc_bot = 0' ),
 248                         array( 'addPgIndex', 'templatelinks', 'templatelinks_from', '(tl_from)' ),
 249                         array( 'addPgIndex', 'watchlist', 'wl_user', '(wl_user)' ),
 250                         array( 'addPgIndex', 'logging', 'logging_user_type_time',
 251                                 '(log_user, log_type, log_timestamp)' ),
 252                         array( 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ),
 253                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ),
 254                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ),
 255                         array( 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ),
 256                         array( 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ),
 257                         array( 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ),
 258                         array( 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ),
 259                         array( 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ),
 260
 261                         array( 'checkIndex', 'pagelink_unique', array(
 262                                 array( 'pl_from', 'int4_ops', 'btree', 0 ),
 263                                 array( 'pl_namespace', 'int2_ops', 'btree', 0 ),
 264                                 array( 'pl_title', 'text_ops', 'btree', 0 ),
 265                         ),
 266                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ),
 267                         array( 'checkIndex', 'cl_sortkey', array(
 268                                 array( 'cl_to', 'text_ops', 'btree', 0 ),
 269                                 array( 'cl_sortkey', 'text_ops', 'btree', 0 ),
 270                                 array( 'cl_from', 'int4_ops', 'btree', 0 ),
 271                         ),
 272                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 273                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ),
 274                         array( 'checkIndex', 'iwl_prefix_title_from', array(
 275                                 array( 'iwl_prefix', 'text_ops', 'btree', 0 ),
 276                                 array( 'iwl_title', 'text_ops', 'btree', 0 ),
 277                                 array( 'iwl_from', 'int4_ops', 'btree', 0 ),
 278                         ),
 279                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 280                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ),
 281                         array( 'checkIndex', 'logging_times', array(
 282                                 array( 'log_timestamp', 'timestamptz_ops', 'btree', 0 ),
 283                         ),
 284                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ),
 285                         array( 'dropIndex', 'oldimage', 'oi_name' ),
 286                         array( 'checkIndex', 'oi_name_archive_name', array(
 287                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 288                                 array( 'oi_archive_name', 'text_ops', 'btree', 0 ),
 289                         ),
 290                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 291                                 'USING "btree" ("oi_name", "oi_archive_name")' ),
 292                         array( 'checkIndex', 'oi_name_timestamp', array(
 293                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 294                                 array( 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ),
 295                         ),
 296                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 297                                 'USING "btree" ("oi_name", "oi_timestamp")' ),
 298                         array( 'checkIndex', 'page_main_title', array(
 299                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 300                         ),
 301                         'CREATE INDEX "page_main_title" ON "page" ' .
 302                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ),
 303                         array( 'checkIndex', 'page_mediawiki_title', array(
 304                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 305                         ),
 306                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 307                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ),
 308                         array( 'checkIndex', 'page_project_title', array(
 309                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 310                         ),
 311                         'CREATE INDEX "page_project_title" ON "page" ' .
 312                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 313                                 'WHERE ("page_namespace" = 4)' ),
 314                         array( 'checkIndex', 'page_talk_title', array(
 315                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 316                         ),
 317                         'CREATE INDEX "page_talk_title" ON "page" ' .
 318                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 319                                 'WHERE ("page_namespace" = 1)' ),
 320                         array( 'checkIndex', 'page_user_title', array(
 321                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 322                         ),
 323                         'CREATE INDEX "page_user_title" ON "page" ' .
 324                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 325                                 '("page_namespace" = 2)' ),
 326                         array( 'checkIndex', 'page_utalk_title', array(
 327                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 328                         ),
 329                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 330                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 331                                 'WHERE ("page_namespace" = 3)' ),
 332                         array( 'checkIndex', 'ts2_page_text', array(
 333                                 array( 'textvector', 'tsvector_ops', 'gist', 0 ),
 334                         ),
 335                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ),
 336                         array( 'checkIndex', 'ts2_page_title', array(
 337                                 array( 'titlevector', 'tsvector_ops', 'gist', 0 ),
 338                         ),
 339                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ),
 340
 341                         array( 'checkOiNameConstraint' ),
 342                         array( 'checkPageDeletedTrigger' ),
 343                         array( 'checkRevUserFkey' ),
 344                         array( 'dropIndex', 'ipblocks', 'ipb_address' ),
 345                         array( 'checkIndex', 'ipb_address_unique', array(
 346                                 array( 'ipb_address', 'text_ops', 'btree', 0 ),
 347                                 array( 'ipb_user', 'int4_ops', 'btree', 0 ),
 348                                 array( 'ipb_auto', 'int2_ops', 'btree', 0 ),
 349                                 array( 'ipb_anon_only', 'int2_ops', 'btree', 0 ),
 350                         ),
 351                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 352                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ),
 353
 354                         array( 'checkIwlPrefix' ),
 355
 356                         # All FK columns should be deferred
 357                         array( 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 358                         array( 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ),
 359                         array( 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ),
 360                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 361                                 'mwuser(user_id) ON DELETE SET NULL' ),
 362                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 363                         array( 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 364                         array( 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ),
 365                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ),
 366                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 367                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 368                                 'ipblocks(ipb_id) ON DELETE SET NULL' ),
 369                         array( 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ),
 370                         array( 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 371                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 372                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ),
 373                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 374                         array( 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ),
 375                         array( 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ),
 376                         array( 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 377                                 'page(page_id) ON DELETE CASCADE' ),
 378                         array( 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 379                                 'mwuser(user_id) ON DELETE SET NULL' ),
 380                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_cur_id',
 381                                 'page(page_id) ON DELETE SET NULL' ),
 382                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 383                                 'mwuser(user_id) ON DELETE SET NULL' ),
 384                         array( 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ),
 385                         array( 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ),
 386                         array( 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ),
 387                         array( 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ),
 388                         array( 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 389                         array( 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ),
 390                         array( 'changeFkeyDeferrable', 'user_properties', 'up_user',
 391                                 'mwuser(user_id) ON DELETE CASCADE' ),
 392                         array( 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 393
 394                         # r81574
 395                         array( 'addInterwikiType' ),
 396                         # end
 397                         array( 'tsearchFixes' ),
 398
 399                         // 1.22
 400                         array( 'addPgField', 'recentchanges', 'rc_source',            "TEXT NOT NULL DEFAULT ''" ),
 401                 );
 402         }
 403
 404         protected function getOldGlobalUpdates() {
 405                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 406
 407                 $updates = array();
 408
 409                 # Add missing extension tables
 410                 foreach ( $wgExtNewTables as $tableRecord ) {
 411                         $updates[] = array(
 412                                 'addTable', $tableRecord[0], $tableRecord[1], true
 413                         );
 414                 }
 415
 416                 # Add missing extension fields
 417                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 418                         $updates[] = array(
 419                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 420                                 $fieldRecord[2]
 421                         );
 422                 }
 423
 424                 # Change altered columns
 425                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 426                         $updates[] = array(
 427                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 428                                 $fieldRecord[2]
 429                         );
 430                 }
 431
 432                 # Add missing extension indexes
 433                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 434                         $updates[] = array(
 435                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 436                                 $fieldRecord[2]
 437                         );
 438                 }
 439
 440                 return $updates;
 441         }
 442
 443         protected function describeTable( $table ) {
 444                 $q = <<<END
 445 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 446         WHERE pg_class.relnamespace = pg_namespace.oid
 447           AND attrelid=pg_class.oid AND attnum > 0
 448           AND relname=%s AND nspname=%s
 449 END;
 450                 $res = $this->db->query( sprintf( $q,
 451                         $this->db->addQuotes( $table ),
 452                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 453                 if ( !$res ) {
 454                         return null;
 455                 }
 456
 457                 $cols = array();
 458                 foreach ( $res as $r ) {
 459                         $cols[] = array(
 460                                 "name" => $r[0],
 461                                 "ord" => $r[1],
 462                         );
 463                 }
 464
 465                 return $cols;
 466         }
 467
 468         function describeIndex( $idx ) {
 469                 // first fetch the key (which is a list of columns ords) and
 470                 // the table the index applies to (an oid)
 471                 $q = <<<END
 472 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 473         WHERE nspname=%s
 474           AND pg_class.relnamespace = pg_namespace.oid
 475           AND relname=%s
 476           AND indexrelid=pg_class.oid
 477 END;
 478                 $res = $this->db->query(
 479                         sprintf(
 480                                 $q,
 481                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 482                                 $this->db->addQuotes( $idx )
 483                         )
 484                 );
 485                 if ( !$res ) {
 486                         return null;
 487                 }
 488                 if ( !( $r = $this->db->fetchRow( $res ) ) ) {
 489                         return null;
 490                 }
 491
 492                 $indkey = $r[0];
 493                 $relid = intval( $r[1] );
 494                 $indkeys = explode( ' ', $indkey );
 495
 496                 $colnames = array();
 497                 foreach ( $indkeys as $rid ) {
 498                         $query = <<<END
 499 SELECT attname FROM pg_class, pg_attribute
 500         WHERE attrelid=$relid
 501           AND attnum=%d
 502           AND attrelid=pg_class.oid
 503 END;
 504                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 505                         if ( !$r2 ) {
 506                                 return null;
 507                         }
 508                         if ( !( $row2 = $this->db->fetchRow( $r2 ) ) ) {
 509                                 return null;
 510                         }
 511                         $colnames[] = $row2[0];
 512                 }
 513
 514                 return $colnames;
 515         }
 516
 517         function fkeyDeltype( $fkey ) {
 518                 $q = <<<END
 519 SELECT confdeltype FROM pg_constraint, pg_namespace
 520         WHERE connamespace=pg_namespace.oid
 521           AND nspname=%s
 522           AND conname=%s;
 523 END;
 524                 $r = $this->db->query(
 525                         sprintf(
 526                                 $q,
 527                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 528                                 $this->db->addQuotes( $fkey )
 529                         )
 530                 );
 531                 if ( !( $row = $this->db->fetchRow( $r ) ) ) {
 532                         return null;
 533                 }
 534
 535                 return $row[0];
 536         }
 537
 538         function ruleDef( $table, $rule ) {
 539                 $q = <<<END
 540 SELECT definition FROM pg_rules
 541         WHERE schemaname = %s
 542           AND tablename = %s
 543           AND rulename = %s
 544 END;
 545                 $r = $this->db->query(
 546                         sprintf(
 547                                 $q,
 548                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 549                                 $this->db->addQuotes( $table ),
 550                                 $this->db->addQuotes( $rule )
 551                         )
 552                 );
 553                 $row = $this->db->fetchRow( $r );
 554                 if ( !$row ) {
 555                         return null;
 556                 }
 557                 $d = $row[0];
 558
 559                 return $d;
 560         }
 561
 562         protected function addSequence( $table, $pkey, $ns ) {
 563                 if ( !$this->db->sequenceExists( $ns ) ) {
 564                         $this->output( "Creating sequence $ns\n" );
 565                         $this->db->query( "CREATE SEQUENCE $ns" );
 566                         if ( $pkey !== false ) {
 567                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 568                         }
 569                 }
 570         }
 571
 572         protected function renameSequence( $old, $new ) {
 573                 if ( $this->db->sequenceExists( $new ) ) {
 574                         $this->output( "...sequence $new already exists.\n" );
 575
 576                         return;
 577                 }
 578                 if ( $this->db->sequenceExists( $old ) ) {
 579                         $this->output( "Renaming sequence $old to $new\n" );
 580                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 581                 }
 582         }
 583
 584         protected function renameTable( $old, $new, $patch = false ) {
 585                 if ( $this->db->tableExists( $old ) ) {
 586                         $this->output( "Renaming table $old to $new\n" );
 587                         $old = $this->db->realTableName( $old, "quoted" );
 588                         $new = $this->db->realTableName( $new, "quoted" );
 589                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 590                         if ( $patch !== false ) {
 591                                 $this->applyPatch( $patch );
 592                         }
 593                 }
 594         }
 595
 596         protected function renameIndex(
 597                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 598         ) {
 599                 // First requirement: the table must exist
 600                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 601                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 602
 603                         return;
 604                 }
 605
 606                 // Second requirement: the new index must be missing
 607                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 608                         $this->output( "...index $new already set on $table table.\n" );
 609                         if ( !$skipBothIndexExistWarning
 610                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 611                         ) {
 612                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 613                                         "renamed into $new (which also exists).\n" .
 614                                         "            $old should be manually removed if not needed anymore.\n" );
 615                         }
 616
 617                         return;
 618                 }
 619
 620                 // Third requirement: the old index must exist
 621                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 622                         $this->output( "...skipping: index $old doesn't exist.\n" );
 623
 624                         return;
 625                 }
 626
 627                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 628         }
 629
 630         protected function addPgField( $table, $field, $type ) {
 631                 $fi = $this->db->fieldInfo( $table, $field );
 632                 if ( !is_null( $fi ) ) {
 633                         $this->output( "...column '$table.$field' already exists\n" );
 634
 635                         return;
 636                 } else {
 637                         $this->output( "Adding column '$table.$field'\n" );
 638                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 639                 }
 640         }
 641
 642         protected function changeField( $table, $field, $newtype, $default ) {
 643                 $fi = $this->db->fieldInfo( $table, $field );
 644                 if ( is_null( $fi ) ) {
 645                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 646                         exit( 1 );
 647                 }
 648
 649                 if ( $fi->type() === $newtype ) {
 650                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 651                 } else {
 652                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 653                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 654                         if ( strlen( $default ) ) {
 655                                 $res = array();
 656                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 657                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 658                                         $this->db->query( $sqldef );
 659                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 660                                 }
 661                                 $sql .= " USING $default";
 662                         }
 663                         $this->db->query( $sql );
 664                 }
 665         }
 666
 667         protected function setDefault( $table, $field, $default ) {
 668
 669                 $info = $this->db->fieldInfo( $table, $field );
 670                 if ( $info->defaultValue() !== $default ) {
 671                         $this->output( "Changing '$table.$field' default value\n" );
 672                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 673                 }
 674         }
 675
 676         protected function changeNullableField( $table, $field, $null ) {
 677                 $fi = $this->db->fieldInfo( $table, $field );
 678                 if ( is_null( $fi ) ) {
 679                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 680                         exit( 1 );
 681                 }
 682                 if ( $fi->isNullable() ) {
 683                         # # It's NULL - does it need to be NOT NULL?
 684                         if ( 'NOT NULL' === $null ) {
 685                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 686                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 687                         } else {
 688                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 689                         }
 690                 } else {
 691                         # # It's NOT NULL - does it need to be NULL?
 692                         if ( 'NULL' === $null ) {
 693                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 694                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 695                         } else {
 696                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 697                         }
 698                 }
 699         }
 700
 701         public function addPgIndex( $table, $index, $type ) {
 702                 if ( $this->db->indexExists( $table, $index ) ) {
 703                         $this->output( "...index '$index' on table '$table' already exists\n" );
 704                 } else {
 705                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 706                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 707                 }
 708         }
 709
 710         public function addPgExtIndex( $table, $index, $type ) {
 711                 if ( $this->db->indexExists( $table, $index ) ) {
 712                         $this->output( "...index '$index' on table '$table' already exists\n" );
 713                 } else {
 714                         if ( preg_match( '/^\(/', $type ) ) {
 715                                 $this->output( "Creating index '$index' on table '$table'\n" );
 716                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 717                         } else {
 718                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 719                         }
 720                 }
 721         }
 722
 723         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 724                 $fi = $this->db->fieldInfo( $table, $field );
 725                 if ( is_null( $fi ) ) {
 726                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 727                                 "Please report this.\n" );
 728
 729                         return;
 730                 }
 731                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 732                         return;
 733                 }
 734                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 735                 $conname = $fi->conname();
 736                 if ( $fi->conname() ) {
 737                         $conclause = "CONSTRAINT \"$conname\"";
 738                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 739                         $this->db->query( $command );
 740                 } else {
 741                         $this->output( "Column '$table.$field' does not have a foreign key " .
 742                                 "constraint, will be added\n" );
 743                         $conclause = "";
 744                 }
 745                 $command =
 746                         "ALTER TABLE $table ADD $conclause " .
 747                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 748                 $this->db->query( $command );
 749         }
 750
 751         protected function convertArchive2() {
 752                 if ( $this->db->tableExists( "archive2" ) ) {
 753                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 754                                 $this->output( "Dropping rule 'archive_insert'\n" );
 755                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 756                         }
 757                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 758                                 $this->output( "Dropping rule 'archive_delete'\n" );
 759                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 760                         }
 761                         $this->applyPatch(
 762                                 'patch-remove-archive2.sql',
 763                                 false,
 764                                 "Converting 'archive2' back to normal archive table"
 765                         );
 766                 } else {
 767                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 768                 }
 769         }
 770
 771         protected function checkOiDeleted() {
 772                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 773                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 774                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 775                         $this->db->query(
 776                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 777                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 778                 } else {
 779                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 780                 }
 781         }
 782
 783         protected function checkOiNameConstraint() {
 784                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 785                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 786                                 "foreign key to image\n" );
 787                 } else {
 788                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 789                                 $this->db->query(
 790                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 791                         }
 792                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 793                                 $this->db->query(
 794                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 795                         }
 796                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 797                         $this->db->query(
 798                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 799                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 800                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 801                 }
 802         }
 803
 804         protected function checkPageDeletedTrigger() {
 805                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 806                         $this->applyPatch(
 807                                 'patch-page_deleted.sql',
 808                                 false,
 809                                 "Adding function and trigger 'page_deleted' to table 'page'"
 810                         );
 811                 } else {
 812                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 813                 }
 814         }
 815
 816         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 817                 if ( $this->db->indexExists( $table, $index ) ) {
 818                         $this->output( "Dropping obsolete index '$index'\n" );
 819                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 820                 }
 821         }
 822
 823         protected function checkIndex( $index, $should_be, $good_def ) {
 824                 $pu = $this->db->indexAttributes( $index );
 825                 if ( !empty( $pu ) && $pu != $should_be ) {
 826                         $this->output( "Dropping obsolete version of index '$index'\n" );
 827                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 828                         $pu = array();
 829                 } else {
 830                         $this->output( "...no need to drop index '$index'\n" );
 831                 }
 832
 833                 if ( empty( $pu ) ) {
 834                         $this->output( "Creating index '$index'\n" );
 835                         $this->db->query( $good_def );
 836                 } else {
 837                         $this->output( "...index '$index' exists\n" );
 838                 }
 839         }
 840
 841         protected function checkRevUserFkey() {
 842                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 843                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 844                 } else {
 845                         $this->applyPatch(
 846                                 'patch-revision_rev_user_fkey.sql',
 847                                 false,
 848                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 849                         );
 850                 }
 851         }
 852
 853         protected function checkIwlPrefix() {
 854                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 855                         $this->applyPatch(
 856                                 'patch-rename-iwl_prefix.sql',
 857                                 false,
 858                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 859                         );
 860                 }
 861         }
 862
 863         protected function addInterwikiType() {
 864                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 865         }
 866
 867         protected function tsearchFixes() {
 868                 # Tweak the page_title tsearch2 trigger to filter out slashes
 869                 # This is create or replace, so harmless to call if not needed
 870                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 871
 872                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 873                 # in case they have the old 'default' versions
 874                 # Gather version numbers in case we need them
 875                 if ( $this->db->getServerVersion() >= 8.3 ) {
 876                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 877                 }
 878         }
 879 }