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                         array( 'addPgIndex', 'logging', 'logging_user_text_type_time', '(log_user_text, log_type, log_timestamp)' ),
 263                         array( 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ),
 264
 265                         array( 'checkIndex', 'pagelink_unique', array(
 266                                 array( 'pl_from', 'int4_ops', 'btree', 0 ),
 267                                 array( 'pl_namespace', 'int2_ops', 'btree', 0 ),
 268                                 array( 'pl_title', 'text_ops', 'btree', 0 ),
 269                         ),
 270                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ),
 271                         array( 'checkIndex', 'cl_sortkey', array(
 272                                 array( 'cl_to', 'text_ops', 'btree', 0 ),
 273                                 array( 'cl_sortkey', 'text_ops', 'btree', 0 ),
 274                                 array( 'cl_from', 'int4_ops', 'btree', 0 ),
 275                         ),
 276                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 277                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ),
 278                         array( 'checkIndex', 'iwl_prefix_title_from', array(
 279                                 array( 'iwl_prefix', 'text_ops', 'btree', 0 ),
 280                                 array( 'iwl_title', 'text_ops', 'btree', 0 ),
 281                                 array( 'iwl_from', 'int4_ops', 'btree', 0 ),
 282                         ),
 283                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 284                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ),
 285                         array( 'checkIndex', 'logging_times', array(
 286                                 array( 'log_timestamp', 'timestamptz_ops', 'btree', 0 ),
 287                         ),
 288                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ),
 289                         array( 'dropIndex', 'oldimage', 'oi_name' ),
 290                         array( 'checkIndex', 'oi_name_archive_name', array(
 291                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 292                                 array( 'oi_archive_name', 'text_ops', 'btree', 0 ),
 293                         ),
 294                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 295                                 'USING "btree" ("oi_name", "oi_archive_name")' ),
 296                         array( 'checkIndex', 'oi_name_timestamp', array(
 297                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 298                                 array( 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ),
 299                         ),
 300                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 301                                 'USING "btree" ("oi_name", "oi_timestamp")' ),
 302                         array( 'checkIndex', 'page_main_title', array(
 303                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 304                         ),
 305                         'CREATE INDEX "page_main_title" ON "page" ' .
 306                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ),
 307                         array( 'checkIndex', 'page_mediawiki_title', array(
 308                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 309                         ),
 310                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 311                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ),
 312                         array( 'checkIndex', 'page_project_title', array(
 313                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 314                         ),
 315                         'CREATE INDEX "page_project_title" ON "page" ' .
 316                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 317                                 'WHERE ("page_namespace" = 4)' ),
 318                         array( 'checkIndex', 'page_talk_title', array(
 319                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 320                         ),
 321                         'CREATE INDEX "page_talk_title" ON "page" ' .
 322                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 323                                 'WHERE ("page_namespace" = 1)' ),
 324                         array( 'checkIndex', 'page_user_title', array(
 325                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 326                         ),
 327                         'CREATE INDEX "page_user_title" ON "page" ' .
 328                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 329                                 '("page_namespace" = 2)' ),
 330                         array( 'checkIndex', 'page_utalk_title', array(
 331                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 332                         ),
 333                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 334                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 335                                 'WHERE ("page_namespace" = 3)' ),
 336                         array( 'checkIndex', 'ts2_page_text', array(
 337                                 array( 'textvector', 'tsvector_ops', 'gist', 0 ),
 338                         ),
 339                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ),
 340                         array( 'checkIndex', 'ts2_page_title', array(
 341                                 array( 'titlevector', 'tsvector_ops', 'gist', 0 ),
 342                         ),
 343                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ),
 344
 345                         array( 'checkOiNameConstraint' ),
 346                         array( 'checkPageDeletedTrigger' ),
 347                         array( 'checkRevUserFkey' ),
 348                         array( 'dropIndex', 'ipblocks', 'ipb_address' ),
 349                         array( 'checkIndex', 'ipb_address_unique', array(
 350                                 array( 'ipb_address', 'text_ops', 'btree', 0 ),
 351                                 array( 'ipb_user', 'int4_ops', 'btree', 0 ),
 352                                 array( 'ipb_auto', 'int2_ops', 'btree', 0 ),
 353                                 array( 'ipb_anon_only', 'int2_ops', 'btree', 0 ),
 354                         ),
 355                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 356                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ),
 357
 358                         array( 'checkIwlPrefix' ),
 359
 360                         # All FK columns should be deferred
 361                         array( 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 362                         array( 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ),
 363                         array( 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ),
 364                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 365                                 'mwuser(user_id) ON DELETE SET NULL' ),
 366                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 367                         array( 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 368                         array( 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ),
 369                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ),
 370                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 371                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 372                                 'ipblocks(ipb_id) ON DELETE SET NULL' ),
 373                         array( 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ),
 374                         array( 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 375                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 376                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ),
 377                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 378                         array( 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ),
 379                         array( 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ),
 380                         array( 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 381                                 'page(page_id) ON DELETE CASCADE' ),
 382                         array( 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 383                                 'mwuser(user_id) ON DELETE SET NULL' ),
 384                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_cur_id',
 385                                 'page(page_id) ON DELETE SET NULL' ),
 386                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 387                                 'mwuser(user_id) ON DELETE SET NULL' ),
 388                         array( 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ),
 389                         array( 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ),
 390                         array( 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ),
 391                         array( 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ),
 392                         array( 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 393                         array( 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ),
 394                         array( 'changeFkeyDeferrable', 'user_properties', 'up_user',
 395                                 'mwuser(user_id) ON DELETE CASCADE' ),
 396                         array( 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 397
 398                         # r81574
 399                         array( 'addInterwikiType' ),
 400                         # end
 401                         array( 'tsearchFixes' ),
 402
 403                         // 1.23
 404                         array( 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ),
 405                         array( 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ),
 406                 );
 407         }
 408
 409         protected function getOldGlobalUpdates() {
 410                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 411
 412                 $updates = array();
 413
 414                 # Add missing extension tables
 415                 foreach ( $wgExtNewTables as $tableRecord ) {
 416                         $updates[] = array(
 417                                 'addTable', $tableRecord[0], $tableRecord[1], true
 418                         );
 419                 }
 420
 421                 # Add missing extension fields
 422                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 423                         $updates[] = array(
 424                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 425                                 $fieldRecord[2]
 426                         );
 427                 }
 428
 429                 # Change altered columns
 430                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 431                         $updates[] = array(
 432                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 433                                 $fieldRecord[2]
 434                         );
 435                 }
 436
 437                 # Add missing extension indexes
 438                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 439                         $updates[] = array(
 440                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 441                                 $fieldRecord[2]
 442                         );
 443                 }
 444
 445                 return $updates;
 446         }
 447
 448         protected function describeTable( $table ) {
 449                 $q = <<<END
 450 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 451         WHERE pg_class.relnamespace = pg_namespace.oid
 452           AND attrelid=pg_class.oid AND attnum > 0
 453           AND relname=%s AND nspname=%s
 454 END;
 455                 $res = $this->db->query( sprintf( $q,
 456                         $this->db->addQuotes( $table ),
 457                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 458                 if ( !$res ) {
 459                         return null;
 460                 }
 461
 462                 $cols = array();
 463                 foreach ( $res as $r ) {
 464                         $cols[] = array(
 465                                 "name" => $r[0],
 466                                 "ord" => $r[1],
 467                         );
 468                 }
 469
 470                 return $cols;
 471         }
 472
 473         function describeIndex( $idx ) {
 474                 // first fetch the key (which is a list of columns ords) and
 475                 // the table the index applies to (an oid)
 476                 $q = <<<END
 477 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 478         WHERE nspname=%s
 479           AND pg_class.relnamespace = pg_namespace.oid
 480           AND relname=%s
 481           AND indexrelid=pg_class.oid
 482 END;
 483                 $res = $this->db->query(
 484                         sprintf(
 485                                 $q,
 486                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 487                                 $this->db->addQuotes( $idx )
 488                         )
 489                 );
 490                 if ( !$res ) {
 491                         return null;
 492                 }
 493                 if ( !( $r = $this->db->fetchRow( $res ) ) ) {
 494                         return null;
 495                 }
 496
 497                 $indkey = $r[0];
 498                 $relid = intval( $r[1] );
 499                 $indkeys = explode( ' ', $indkey );
 500
 501                 $colnames = array();
 502                 foreach ( $indkeys as $rid ) {
 503                         $query = <<<END
 504 SELECT attname FROM pg_class, pg_attribute
 505         WHERE attrelid=$relid
 506           AND attnum=%d
 507           AND attrelid=pg_class.oid
 508 END;
 509                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 510                         if ( !$r2 ) {
 511                                 return null;
 512                         }
 513                         if ( !( $row2 = $this->db->fetchRow( $r2 ) ) ) {
 514                                 return null;
 515                         }
 516                         $colnames[] = $row2[0];
 517                 }
 518
 519                 return $colnames;
 520         }
 521
 522         function fkeyDeltype( $fkey ) {
 523                 $q = <<<END
 524 SELECT confdeltype FROM pg_constraint, pg_namespace
 525         WHERE connamespace=pg_namespace.oid
 526           AND nspname=%s
 527           AND conname=%s;
 528 END;
 529                 $r = $this->db->query(
 530                         sprintf(
 531                                 $q,
 532                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 533                                 $this->db->addQuotes( $fkey )
 534                         )
 535                 );
 536                 if ( !( $row = $this->db->fetchRow( $r ) ) ) {
 537                         return null;
 538                 }
 539
 540                 return $row[0];
 541         }
 542
 543         function ruleDef( $table, $rule ) {
 544                 $q = <<<END
 545 SELECT definition FROM pg_rules
 546         WHERE schemaname = %s
 547           AND tablename = %s
 548           AND rulename = %s
 549 END;
 550                 $r = $this->db->query(
 551                         sprintf(
 552                                 $q,
 553                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 554                                 $this->db->addQuotes( $table ),
 555                                 $this->db->addQuotes( $rule )
 556                         )
 557                 );
 558                 $row = $this->db->fetchRow( $r );
 559                 if ( !$row ) {
 560                         return null;
 561                 }
 562                 $d = $row[0];
 563
 564                 return $d;
 565         }
 566
 567         protected function addSequence( $table, $pkey, $ns ) {
 568                 if ( !$this->db->sequenceExists( $ns ) ) {
 569                         $this->output( "Creating sequence $ns\n" );
 570                         $this->db->query( "CREATE SEQUENCE $ns" );
 571                         if ( $pkey !== false ) {
 572                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 573                         }
 574                 }
 575         }
 576
 577         protected function renameSequence( $old, $new ) {
 578                 if ( $this->db->sequenceExists( $new ) ) {
 579                         $this->output( "...sequence $new already exists.\n" );
 580
 581                         return;
 582                 }
 583                 if ( $this->db->sequenceExists( $old ) ) {
 584                         $this->output( "Renaming sequence $old to $new\n" );
 585                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 586                 }
 587         }
 588
 589         protected function renameTable( $old, $new, $patch = false ) {
 590                 if ( $this->db->tableExists( $old ) ) {
 591                         $this->output( "Renaming table $old to $new\n" );
 592                         $old = $this->db->realTableName( $old, "quoted" );
 593                         $new = $this->db->realTableName( $new, "quoted" );
 594                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 595                         if ( $patch !== false ) {
 596                                 $this->applyPatch( $patch );
 597                         }
 598                 }
 599         }
 600
 601         protected function renameIndex(
 602                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 603         ) {
 604                 // First requirement: the table must exist
 605                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 606                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 607
 608                         return;
 609                 }
 610
 611                 // Second requirement: the new index must be missing
 612                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 613                         $this->output( "...index $new already set on $table table.\n" );
 614                         if ( !$skipBothIndexExistWarning
 615                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 616                         ) {
 617                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 618                                         "renamed into $new (which also exists).\n" .
 619                                         "            $old should be manually removed if not needed anymore.\n" );
 620                         }
 621
 622                         return;
 623                 }
 624
 625                 // Third requirement: the old index must exist
 626                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 627                         $this->output( "...skipping: index $old doesn't exist.\n" );
 628
 629                         return;
 630                 }
 631
 632                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 633         }
 634
 635         protected function addPgField( $table, $field, $type ) {
 636                 $fi = $this->db->fieldInfo( $table, $field );
 637                 if ( !is_null( $fi ) ) {
 638                         $this->output( "...column '$table.$field' already exists\n" );
 639
 640                         return;
 641                 } else {
 642                         $this->output( "Adding column '$table.$field'\n" );
 643                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 644                 }
 645         }
 646
 647         protected function changeField( $table, $field, $newtype, $default ) {
 648                 $fi = $this->db->fieldInfo( $table, $field );
 649                 if ( is_null( $fi ) ) {
 650                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 651                         exit( 1 );
 652                 }
 653
 654                 if ( $fi->type() === $newtype ) {
 655                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 656                 } else {
 657                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 658                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 659                         if ( strlen( $default ) ) {
 660                                 $res = array();
 661                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 662                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 663                                         $this->db->query( $sqldef );
 664                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 665                                 }
 666                                 $sql .= " USING $default";
 667                         }
 668                         $this->db->query( $sql );
 669                 }
 670         }
 671
 672         protected function setDefault( $table, $field, $default ) {
 673
 674                 $info = $this->db->fieldInfo( $table, $field );
 675                 if ( $info->defaultValue() !== $default ) {
 676                         $this->output( "Changing '$table.$field' default value\n" );
 677                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 678                 }
 679         }
 680
 681         protected function changeNullableField( $table, $field, $null ) {
 682                 $fi = $this->db->fieldInfo( $table, $field );
 683                 if ( is_null( $fi ) ) {
 684                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 685                         exit( 1 );
 686                 }
 687                 if ( $fi->isNullable() ) {
 688                         # # It's NULL - does it need to be NOT NULL?
 689                         if ( 'NOT NULL' === $null ) {
 690                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 691                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 692                         } else {
 693                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 694                         }
 695                 } else {
 696                         # # It's NOT NULL - does it need to be NULL?
 697                         if ( 'NULL' === $null ) {
 698                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 699                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 700                         } else {
 701                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 702                         }
 703                 }
 704         }
 705
 706         public function addPgIndex( $table, $index, $type ) {
 707                 if ( $this->db->indexExists( $table, $index ) ) {
 708                         $this->output( "...index '$index' on table '$table' already exists\n" );
 709                 } else {
 710                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 711                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 712                 }
 713         }
 714
 715         public function addPgExtIndex( $table, $index, $type ) {
 716                 if ( $this->db->indexExists( $table, $index ) ) {
 717                         $this->output( "...index '$index' on table '$table' already exists\n" );
 718                 } else {
 719                         if ( preg_match( '/^\(/', $type ) ) {
 720                                 $this->output( "Creating index '$index' on table '$table'\n" );
 721                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 722                         } else {
 723                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 724                         }
 725                 }
 726         }
 727
 728         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 729                 $fi = $this->db->fieldInfo( $table, $field );
 730                 if ( is_null( $fi ) ) {
 731                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 732                                 "Please report this.\n" );
 733
 734                         return;
 735                 }
 736                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 737                         return;
 738                 }
 739                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 740                 $conname = $fi->conname();
 741                 if ( $fi->conname() ) {
 742                         $conclause = "CONSTRAINT \"$conname\"";
 743                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 744                         $this->db->query( $command );
 745                 } else {
 746                         $this->output( "Column '$table.$field' does not have a foreign key " .
 747                                 "constraint, will be added\n" );
 748                         $conclause = "";
 749                 }
 750                 $command =
 751                         "ALTER TABLE $table ADD $conclause " .
 752                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 753                 $this->db->query( $command );
 754         }
 755
 756         protected function convertArchive2() {
 757                 if ( $this->db->tableExists( "archive2" ) ) {
 758                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 759                                 $this->output( "Dropping rule 'archive_insert'\n" );
 760                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 761                         }
 762                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 763                                 $this->output( "Dropping rule 'archive_delete'\n" );
 764                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 765                         }
 766                         $this->applyPatch(
 767                                 'patch-remove-archive2.sql',
 768                                 false,
 769                                 "Converting 'archive2' back to normal archive table"
 770                         );
 771                 } else {
 772                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 773                 }
 774         }
 775
 776         protected function checkOiDeleted() {
 777                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 778                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 779                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 780                         $this->db->query(
 781                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 782                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 783                 } else {
 784                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 785                 }
 786         }
 787
 788         protected function checkOiNameConstraint() {
 789                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 790                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 791                                 "foreign key to image\n" );
 792                 } else {
 793                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 794                                 $this->db->query(
 795                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 796                         }
 797                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 798                                 $this->db->query(
 799                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 800                         }
 801                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 802                         $this->db->query(
 803                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 804                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 805                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 806                 }
 807         }
 808
 809         protected function checkPageDeletedTrigger() {
 810                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 811                         $this->applyPatch(
 812                                 'patch-page_deleted.sql',
 813                                 false,
 814                                 "Adding function and trigger 'page_deleted' to table 'page'"
 815                         );
 816                 } else {
 817                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 818                 }
 819         }
 820
 821         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 822                 if ( $this->db->indexExists( $table, $index ) ) {
 823                         $this->output( "Dropping obsolete index '$index'\n" );
 824                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 825                 }
 826         }
 827
 828         protected function checkIndex( $index, $should_be, $good_def ) {
 829                 $pu = $this->db->indexAttributes( $index );
 830                 if ( !empty( $pu ) && $pu != $should_be ) {
 831                         $this->output( "Dropping obsolete version of index '$index'\n" );
 832                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 833                         $pu = array();
 834                 } else {
 835                         $this->output( "...no need to drop index '$index'\n" );
 836                 }
 837
 838                 if ( empty( $pu ) ) {
 839                         $this->output( "Creating index '$index'\n" );
 840                         $this->db->query( $good_def );
 841                 } else {
 842                         $this->output( "...index '$index' exists\n" );
 843                 }
 844         }
 845
 846         protected function checkRevUserFkey() {
 847                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 848                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 849                 } else {
 850                         $this->applyPatch(
 851                                 'patch-revision_rev_user_fkey.sql',
 852                                 false,
 853                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 854                         );
 855                 }
 856         }
 857
 858         protected function checkIwlPrefix() {
 859                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 860                         $this->applyPatch(
 861                                 'patch-rename-iwl_prefix.sql',
 862                                 false,
 863                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 864                         );
 865                 }
 866         }
 867
 868         protected function addInterwikiType() {
 869                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 870         }
 871
 872         protected function tsearchFixes() {
 873                 # Tweak the page_title tsearch2 trigger to filter out slashes
 874                 # This is create or replace, so harmless to call if not needed
 875                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 876
 877                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 878                 # in case they have the old 'default' versions
 879                 # Gather version numbers in case we need them
 880                 if ( $this->db->getServerVersion() >= 8.3 ) {
 881                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 882                 }
 883         }
 884 }