includes/installer/PostgresUpdater.php

   1 <?php
   2 /**
   3  * PostgreSQL-specific updater.
   4  *
   5  * This program is free software; you can redistribute it and/or modify
   6  * it under the terms of the GNU General Public License as published by
   7  * the Free Software Foundation; either version 2 of the License, or
   8  * (at your option) any later version.
   9  *
  10  * This program is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
  13  * GNU General Public License for more details.
  14  *
  15  * You should have received a copy of the GNU General Public License along
  16  * with this program; if not, write to the Free Software Foundation, Inc.,
  17  * 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
  18  * http://www.gnu.org/copyleft/gpl.html
  19  *
  20  * @file
  21  * @ingroup Deployment
  22  */
  23
  24 /**
  25  * Class for handling updates to Postgres databases.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class PostgresUpdater extends DatabaseUpdater {
  31
  32         /**
  33          * @var DatabasePostgres
  34          */
  35         protected $db;
  36
  37         /**
  38          * @todo FIXME: Postgres should use sequential updates like Mysql, Sqlite
  39          * and everybody else. It never got refactored like it should've.
  40          * @return array
  41          */
  42         protected function getCoreUpdateList() {
  43                 return array(
  44                         # rename tables 1.7.3
  45                         # r15791 Change reserved word table names "user" and "text"
  46                         array( 'renameTable', 'user', 'mwuser' ),
  47                         array( 'renameTable', 'text', 'pagecontent' ),
  48                         array( 'renameIndex', 'mwuser', 'user_pkey', 'mwuser_pkey' ),
  49                         array( 'renameIndex', 'mwuser', 'user_user_name_key', 'mwuser_user_name_key' ),
  50                         array( 'renameIndex', 'pagecontent', 'text_pkey', 'pagecontent_pkey' ),
  51
  52                         # renamed sequences
  53                         array( 'renameSequence', 'ipblocks_ipb_id_val', 'ipblocks_ipb_id_seq' ),
  54                         array( 'renameSequence', 'rev_rev_id_val', 'revision_rev_id_seq' ),
  55                         array( 'renameSequence', 'text_old_id_val', 'text_old_id_seq' ),
  56                         array( 'renameSequence', 'rc_rc_id_seq', 'recentchanges_rc_id_seq' ),
  57                         array( 'renameSequence', 'log_log_id_seq', 'logging_log_id_seq' ),
  58                         array( 'renameSequence', 'pr_id_val', 'page_restrictions_pr_id_seq' ),
  59                         array( 'renameSequence', 'us_id_seq', 'uploadstash_us_id_seq' ),
  60
  61                         # since r58263
  62                         array( 'renameSequence', 'category_id_seq', 'category_cat_id_seq' ),
  63
  64                         # new sequences if not renamed above
  65                         array( 'addSequence', 'logging', false, 'logging_log_id_seq' ),
  66                         array( 'addSequence', 'page_restrictions', false, 'page_restrictions_pr_id_seq' ),
  67                         array( 'addSequence', 'filearchive', 'fa_id', 'filearchive_fa_id_seq' ),
  68                         array( 'addSequence', 'archive', false, 'archive_ar_id_seq' ),
  69                         array( 'addSequence', 'externallinks', false, 'externallinks_el_id_seq' ),
  70
  71                         # new tables
  72                         array( 'addTable', 'category', 'patch-category.sql' ),
  73                         array( 'addTable', 'page', 'patch-page.sql' ),
  74                         array( 'addTable', 'querycachetwo', 'patch-querycachetwo.sql' ),
  75                         array( 'addTable', 'page_props', 'patch-page_props.sql' ),
  76                         array( 'addTable', 'page_restrictions', 'patch-page_restrictions.sql' ),
  77                         array( 'addTable', 'profiling', 'patch-profiling.sql' ),
  78                         array( 'addTable', 'protected_titles', 'patch-protected_titles.sql' ),
  79                         array( 'addTable', 'redirect', 'patch-redirect.sql' ),
  80                         array( 'addTable', 'updatelog', 'patch-updatelog.sql' ),
  81                         array( 'addTable', 'change_tag', 'patch-change_tag.sql' ),
  82                         array( 'addTable', 'tag_summary', 'patch-tag_summary.sql' ),
  83                         array( 'addTable', 'valid_tag', 'patch-valid_tag.sql' ),
  84                         array( 'addTable', 'user_properties', 'patch-user_properties.sql' ),
  85                         array( 'addTable', 'log_search', 'patch-log_search.sql' ),
  86                         array( 'addTable', 'l10n_cache', 'patch-l10n_cache.sql' ),
  87                         array( 'addTable', 'iwlinks', 'patch-iwlinks.sql' ),
  88                         array( 'addTable', 'msg_resource', 'patch-msg_resource.sql' ),
  89                         array( 'addTable', 'msg_resource_links', 'patch-msg_resource_links.sql' ),
  90                         array( 'addTable', 'module_deps', 'patch-module_deps.sql' ),
  91                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
  92                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
  93                         array( 'addTable', 'sites', 'patch-sites.sql' ),
  94
  95                         # Needed before new field
  96                         array( 'convertArchive2' ),
  97
  98                         # new fields
  99                         array( 'addPgField', 'updatelog', 'ul_value', 'TEXT' ),
 100                         array( 'addPgField', 'archive', 'ar_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 101                         array( 'addPgField', 'archive', 'ar_len', 'INTEGER' ),
 102                         array( 'addPgField', 'archive', 'ar_page_id', 'INTEGER' ),
 103                         array( 'addPgField', 'archive', 'ar_parent_id', 'INTEGER' ),
 104                         array( 'addPgField', 'archive', 'ar_content_model', 'TEXT' ),
 105                         array( 'addPgField', 'archive', 'ar_content_format', 'TEXT' ),
 106                         array( 'addPgField', 'categorylinks', 'cl_sortkey_prefix', "TEXT NOT NULL DEFAULT ''" ),
 107                         array( 'addPgField', 'categorylinks', 'cl_collation', "TEXT NOT NULL DEFAULT 0" ),
 108                         array( 'addPgField', 'categorylinks', 'cl_type', "TEXT NOT NULL DEFAULT 'page'" ),
 109                         array( 'addPgField', 'image', 'img_sha1', "TEXT NOT NULL DEFAULT ''" ),
 110                         array( 'addPgField', 'ipblocks', 'ipb_allow_usertalk', 'SMALLINT NOT NULL DEFAULT 0' ),
 111                         array( 'addPgField', 'ipblocks', 'ipb_anon_only', 'SMALLINT NOT NULL DEFAULT 0' ),
 112                         array( 'addPgField', 'ipblocks', 'ipb_by_text', "TEXT NOT NULL DEFAULT ''" ),
 113                         array( 'addPgField', 'ipblocks', 'ipb_block_email', 'SMALLINT NOT NULL DEFAULT 0' ),
 114                         array( 'addPgField', 'ipblocks', 'ipb_create_account', 'SMALLINT NOT NULL DEFAULT 1' ),
 115                         array( 'addPgField', 'ipblocks', 'ipb_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 116                         array( 'addPgField', 'ipblocks', 'ipb_enable_autoblock', 'SMALLINT NOT NULL DEFAULT 1' ),
 117                         array( 'addPgField', 'ipblocks', 'ipb_parent_block_id',
 118                                 'INTEGER DEFAULT NULL REFERENCES ipblocks(ipb_id) ' .
 119                                 'ON DELETE SET NULL DEFERRABLE INITIALLY DEFERRED' ),
 120                         array( 'addPgField', 'filearchive', 'fa_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 121                         array( 'addPgField', 'filearchive', 'fa_sha1', "TEXT NOT NULL DEFAULT ''" ),
 122                         array( 'addPgField', 'logging', 'log_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 123                         array( 'addPgField', 'logging', 'log_id',
 124                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('logging_log_id_seq')" ),
 125                         array( 'addPgField', 'logging', 'log_params', 'TEXT' ),
 126                         array( 'addPgField', 'mwuser', 'user_editcount', 'INTEGER' ),
 127                         array( 'addPgField', 'mwuser', 'user_newpass_time', 'TIMESTAMPTZ' ),
 128                         array( 'addPgField', 'oldimage', 'oi_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 129                         array( 'addPgField', 'oldimage', 'oi_major_mime', "TEXT NOT NULL DEFAULT 'unknown'" ),
 130                         array( 'addPgField', 'oldimage', 'oi_media_type', 'TEXT' ),
 131                         array( 'addPgField', 'oldimage', 'oi_metadata', "BYTEA NOT NULL DEFAULT ''" ),
 132                         array( 'addPgField', 'oldimage', 'oi_minor_mime', "TEXT NOT NULL DEFAULT 'unknown'" ),
 133                         array( 'addPgField', 'oldimage', 'oi_sha1', "TEXT NOT NULL DEFAULT ''" ),
 134                         array( 'addPgField', 'page', 'page_content_model', 'TEXT' ),
 135                         array( 'addPgField', 'page_restrictions', 'pr_id',
 136                                 "INTEGER NOT NULL UNIQUE DEFAULT nextval('page_restrictions_pr_id_seq')" ),
 137                         array( 'addPgField', 'profiling', 'pf_memory', 'NUMERIC(18,10) NOT NULL DEFAULT 0' ),
 138                         array( 'addPgField', 'recentchanges', 'rc_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 139                         array( 'addPgField', 'recentchanges', 'rc_log_action', 'TEXT' ),
 140                         array( 'addPgField', 'recentchanges', 'rc_log_type', 'TEXT' ),
 141                         array( 'addPgField', 'recentchanges', 'rc_logid', 'INTEGER NOT NULL DEFAULT 0' ),
 142                         array( 'addPgField', 'recentchanges', 'rc_new_len', 'INTEGER' ),
 143                         array( 'addPgField', 'recentchanges', 'rc_old_len', 'INTEGER' ),
 144                         array( 'addPgField', 'recentchanges', 'rc_params', 'TEXT' ),
 145                         array( 'addPgField', 'redirect', 'rd_interwiki', 'TEXT NULL' ),
 146                         array( 'addPgField', 'redirect', 'rd_fragment', 'TEXT NULL' ),
 147                         array( 'addPgField', 'revision', 'rev_deleted', 'SMALLINT NOT NULL DEFAULT 0' ),
 148                         array( 'addPgField', 'revision', 'rev_len', 'INTEGER' ),
 149                         array( 'addPgField', 'revision', 'rev_parent_id', 'INTEGER DEFAULT NULL' ),
 150                         array( 'addPgField', 'revision', 'rev_content_model', 'TEXT' ),
 151                         array( 'addPgField', 'revision', 'rev_content_format', 'TEXT' ),
 152                         array( 'addPgField', 'site_stats', 'ss_active_users', "INTEGER DEFAULT '-1'" ),
 153                         array( 'addPgField', 'user_newtalk', 'user_last_timestamp', 'TIMESTAMPTZ' ),
 154                         array( 'addPgField', 'logging', 'log_user_text', "TEXT NOT NULL DEFAULT ''" ),
 155                         array( 'addPgField', 'logging', 'log_page', 'INTEGER' ),
 156                         array( 'addPgField', 'interwiki', 'iw_api', "TEXT NOT NULL DEFAULT ''" ),
 157                         array( 'addPgField', 'interwiki', 'iw_wikiid', "TEXT NOT NULL DEFAULT ''" ),
 158                         array( 'addPgField', 'revision', 'rev_sha1', "TEXT NOT NULL DEFAULT ''" ),
 159                         array( 'addPgField', 'archive', 'ar_sha1', "TEXT NOT NULL DEFAULT ''" ),
 160                         array( 'addPgField', 'uploadstash', 'us_chunk_inx', "INTEGER NULL" ),
 161                         array( 'addPgField', 'job', 'job_timestamp', "TIMESTAMPTZ" ),
 162                         array( 'addPgField', 'job', 'job_random', "INTEGER NOT NULL DEFAULT 0" ),
 163                         array( 'addPgField', 'job', 'job_attempts', "INTEGER NOT NULL DEFAULT 0" ),
 164                         array( 'addPgField', 'job', 'job_token', "TEXT NOT NULL DEFAULT ''" ),
 165                         array( 'addPgField', 'job', 'job_token_timestamp', "TIMESTAMPTZ" ),
 166                         array( 'addPgField', 'job', 'job_sha1', "TEXT NOT NULL DEFAULT ''" ),
 167                         array( 'addPgField', 'archive', 'ar_id',
 168                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('archive_ar_id_seq')" ),
 169                         array( 'addPgField', 'externallinks', 'el_id',
 170                                 "INTEGER NOT NULL PRIMARY KEY DEFAULT nextval('externallinks_el_id_seq')" ),
 171                         array( 'addPgField', 'uploadstash', 'us_props', "BYTEA" ),
 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                         array( 'changeNullableField', 'recentchanges', 'rc_cur_time', 'NULL' ),
 238
 239                         array( 'checkOiDeleted' ),
 240
 241                         # New indexes
 242                         array( 'addPgIndex', 'archive', 'archive_user_text', '(ar_user_text)' ),
 243                         array( 'addPgIndex', 'image', 'img_sha1', '(img_sha1)' ),
 244                         array( 'addPgIndex', 'ipblocks', 'ipb_parent_block_id', '(ipb_parent_block_id)' ),
 245                         array( 'addPgIndex', 'oldimage', 'oi_sha1', '(oi_sha1)' ),
 246                         array( 'addPgIndex', 'page', 'page_mediawiki_title', '(page_title) WHERE page_namespace = 8' ),
 247                         array( 'addPgIndex', 'pagelinks', 'pagelinks_title', '(pl_title)' ),
 248                         array( 'addPgIndex', 'page_props', 'pp_propname_page', '(pp_propname, pp_page)' ),
 249                         array( 'addPgIndex', 'revision', 'rev_text_id_idx', '(rev_text_id)' ),
 250                         array( 'addPgIndex', 'recentchanges', 'rc_timestamp_bot', '(rc_timestamp) WHERE rc_bot = 0' ),
 251                         array( 'addPgIndex', 'templatelinks', 'templatelinks_from', '(tl_from)' ),
 252                         array( 'addPgIndex', 'watchlist', 'wl_user', '(wl_user)' ),
 253                         array( 'addPgIndex', 'watchlist', 'wl_user_notificationtimestamp', '(wl_user, wl_notificationtimestamp)' ),
 254                         array( 'addPgIndex', 'logging', 'logging_user_type_time',
 255                                 '(log_user, log_type, log_timestamp)' ),
 256                         array( 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ),
 257                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ),
 258                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ),
 259                         array( 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ),
 260                         array( 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ),
 261                         array( 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ),
 262                         array( 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ),
 263                         array( 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ),
 264                         array( 'addPgIndex', 'logging', 'logging_user_text_type_time',
 265                                 '(log_user_text, log_type, log_timestamp)' ),
 266                         array( 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ),
 267
 268                         array( 'checkIndex', 'pagelink_unique', array(
 269                                 array( 'pl_from', 'int4_ops', 'btree', 0 ),
 270                                 array( 'pl_namespace', 'int2_ops', 'btree', 0 ),
 271                                 array( 'pl_title', 'text_ops', 'btree', 0 ),
 272                         ),
 273                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ),
 274                         array( 'checkIndex', 'cl_sortkey', array(
 275                                 array( 'cl_to', 'text_ops', 'btree', 0 ),
 276                                 array( 'cl_sortkey', 'text_ops', 'btree', 0 ),
 277                                 array( 'cl_from', 'int4_ops', 'btree', 0 ),
 278                         ),
 279                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 280                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ),
 281                         array( 'checkIndex', 'iwl_prefix_title_from', array(
 282                                 array( 'iwl_prefix', 'text_ops', 'btree', 0 ),
 283                                 array( 'iwl_title', 'text_ops', 'btree', 0 ),
 284                                 array( 'iwl_from', 'int4_ops', 'btree', 0 ),
 285                         ),
 286                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 287                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ),
 288                         array( 'checkIndex', 'logging_times', array(
 289                                 array( 'log_timestamp', 'timestamptz_ops', 'btree', 0 ),
 290                         ),
 291                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ),
 292                         array( 'dropIndex', 'oldimage', 'oi_name' ),
 293                         array( 'checkIndex', 'oi_name_archive_name', array(
 294                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 295                                 array( 'oi_archive_name', 'text_ops', 'btree', 0 ),
 296                         ),
 297                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 298                                 'USING "btree" ("oi_name", "oi_archive_name")' ),
 299                         array( 'checkIndex', 'oi_name_timestamp', array(
 300                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 301                                 array( 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ),
 302                         ),
 303                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 304                                 'USING "btree" ("oi_name", "oi_timestamp")' ),
 305                         array( 'checkIndex', 'page_main_title', array(
 306                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 307                         ),
 308                         'CREATE INDEX "page_main_title" ON "page" ' .
 309                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ),
 310                         array( 'checkIndex', 'page_mediawiki_title', array(
 311                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 312                         ),
 313                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 314                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ),
 315                         array( 'checkIndex', 'page_project_title', array(
 316                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 317                         ),
 318                         'CREATE INDEX "page_project_title" ON "page" ' .
 319                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 320                                 'WHERE ("page_namespace" = 4)' ),
 321                         array( 'checkIndex', 'page_talk_title', array(
 322                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 323                         ),
 324                         'CREATE INDEX "page_talk_title" ON "page" ' .
 325                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 326                                 'WHERE ("page_namespace" = 1)' ),
 327                         array( 'checkIndex', 'page_user_title', array(
 328                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 329                         ),
 330                         'CREATE INDEX "page_user_title" ON "page" ' .
 331                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 332                                 '("page_namespace" = 2)' ),
 333                         array( 'checkIndex', 'page_utalk_title', array(
 334                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 335                         ),
 336                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 337                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 338                                 'WHERE ("page_namespace" = 3)' ),
 339                         array( 'checkIndex', 'ts2_page_text', array(
 340                                 array( 'textvector', 'tsvector_ops', 'gist', 0 ),
 341                         ),
 342                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ),
 343                         array( 'checkIndex', 'ts2_page_title', array(
 344                                 array( 'titlevector', 'tsvector_ops', 'gist', 0 ),
 345                         ),
 346                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ),
 347
 348                         array( 'checkOiNameConstraint' ),
 349                         array( 'checkPageDeletedTrigger' ),
 350                         array( 'checkRevUserFkey' ),
 351                         array( 'dropIndex', 'ipblocks', 'ipb_address' ),
 352                         array( 'checkIndex', 'ipb_address_unique', array(
 353                                 array( 'ipb_address', 'text_ops', 'btree', 0 ),
 354                                 array( 'ipb_user', 'int4_ops', 'btree', 0 ),
 355                                 array( 'ipb_auto', 'int2_ops', 'btree', 0 ),
 356                                 array( 'ipb_anon_only', 'int2_ops', 'btree', 0 ),
 357                         ),
 358                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 359                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ),
 360
 361                         array( 'checkIwlPrefix' ),
 362
 363                         # All FK columns should be deferred
 364                         array( 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 365                         array( 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ),
 366                         array( 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ),
 367                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 368                                 'mwuser(user_id) ON DELETE SET NULL' ),
 369                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 370                         array( 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 371                         array( 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ),
 372                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ),
 373                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 374                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 375                                 'ipblocks(ipb_id) ON DELETE SET NULL' ),
 376                         array( 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ),
 377                         array( 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 378                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 379                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ),
 380                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 381                         array( 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ),
 382                         array( 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ),
 383                         array( 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 384                                 'page(page_id) ON DELETE CASCADE' ),
 385                         array( 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 386                                 'mwuser(user_id) ON DELETE SET NULL' ),
 387                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_cur_id',
 388                                 'page(page_id) ON DELETE SET NULL' ),
 389                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 390                                 'mwuser(user_id) ON DELETE SET NULL' ),
 391                         array( 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ),
 392                         array( 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ),
 393                         array( 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ),
 394                         array( 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ),
 395                         array( 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 396                         array( 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ),
 397                         array( 'changeFkeyDeferrable', 'user_properties', 'up_user',
 398                                 'mwuser(user_id) ON DELETE CASCADE' ),
 399                         array( 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 400
 401                         # r81574
 402                         array( 'addInterwikiType' ),
 403                         # end
 404                         array( 'tsearchFixes' ),
 405
 406                         // 1.23
 407                         array( 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ),
 408                         array( 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ),
 409                         array( 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ),
 410                         array( 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 411                                 "replace(lc_value,'\','\\\\')::bytea" ),
 412
 413                         // 1.24
 414                         array( 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ),
 415                         array( 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 416                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ),
 417                         array( 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ),
 418                         array( 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 419                         array( 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 420                         array( 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 421                 );
 422         }
 423
 424         protected function getOldGlobalUpdates() {
 425                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 426
 427                 $updates = array();
 428
 429                 # Add missing extension tables
 430                 foreach ( $wgExtNewTables as $tableRecord ) {
 431                         $updates[] = array(
 432                                 'addTable', $tableRecord[0], $tableRecord[1], true
 433                         );
 434                 }
 435
 436                 # Add missing extension fields
 437                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 438                         $updates[] = array(
 439                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 440                                 $fieldRecord[2]
 441                         );
 442                 }
 443
 444                 # Change altered columns
 445                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 446                         $updates[] = array(
 447                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 448                                 $fieldRecord[2]
 449                         );
 450                 }
 451
 452                 # Add missing extension indexes
 453                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 454                         $updates[] = array(
 455                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 456                                 $fieldRecord[2]
 457                         );
 458                 }
 459
 460                 return $updates;
 461         }
 462
 463         protected function describeTable( $table ) {
 464                 $q = <<<END
 465 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 466         WHERE pg_class.relnamespace = pg_namespace.oid
 467           AND attrelid=pg_class.oid AND attnum > 0
 468           AND relname=%s AND nspname=%s
 469 END;
 470                 $res = $this->db->query( sprintf( $q,
 471                         $this->db->addQuotes( $table ),
 472                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 473                 if ( !$res ) {
 474                         return null;
 475                 }
 476
 477                 $cols = array();
 478                 foreach ( $res as $r ) {
 479                         $cols[] = array(
 480                                 "name" => $r[0],
 481                                 "ord" => $r[1],
 482                         );
 483                 }
 484
 485                 return $cols;
 486         }
 487
 488         function describeIndex( $idx ) {
 489                 // first fetch the key (which is a list of columns ords) and
 490                 // the table the index applies to (an oid)
 491                 $q = <<<END
 492 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 493         WHERE nspname=%s
 494           AND pg_class.relnamespace = pg_namespace.oid
 495           AND relname=%s
 496           AND indexrelid=pg_class.oid
 497 END;
 498                 $res = $this->db->query(
 499                         sprintf(
 500                                 $q,
 501                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 502                                 $this->db->addQuotes( $idx )
 503                         )
 504                 );
 505                 if ( !$res ) {
 506                         return null;
 507                 }
 508                 if ( !( $r = $this->db->fetchRow( $res ) ) ) {
 509                         return null;
 510                 }
 511
 512                 $indkey = $r[0];
 513                 $relid = intval( $r[1] );
 514                 $indkeys = explode( ' ', $indkey );
 515
 516                 $colnames = array();
 517                 foreach ( $indkeys as $rid ) {
 518                         $query = <<<END
 519 SELECT attname FROM pg_class, pg_attribute
 520         WHERE attrelid=$relid
 521           AND attnum=%d
 522           AND attrelid=pg_class.oid
 523 END;
 524                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 525                         if ( !$r2 ) {
 526                                 return null;
 527                         }
 528                         if ( !( $row2 = $this->db->fetchRow( $r2 ) ) ) {
 529                                 return null;
 530                         }
 531                         $colnames[] = $row2[0];
 532                 }
 533
 534                 return $colnames;
 535         }
 536
 537         function fkeyDeltype( $fkey ) {
 538                 $q = <<<END
 539 SELECT confdeltype FROM pg_constraint, pg_namespace
 540         WHERE connamespace=pg_namespace.oid
 541           AND nspname=%s
 542           AND conname=%s;
 543 END;
 544                 $r = $this->db->query(
 545                         sprintf(
 546                                 $q,
 547                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 548                                 $this->db->addQuotes( $fkey )
 549                         )
 550                 );
 551                 if ( !( $row = $this->db->fetchRow( $r ) ) ) {
 552                         return null;
 553                 }
 554
 555                 return $row[0];
 556         }
 557
 558         function ruleDef( $table, $rule ) {
 559                 $q = <<<END
 560 SELECT definition FROM pg_rules
 561         WHERE schemaname = %s
 562           AND tablename = %s
 563           AND rulename = %s
 564 END;
 565                 $r = $this->db->query(
 566                         sprintf(
 567                                 $q,
 568                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 569                                 $this->db->addQuotes( $table ),
 570                                 $this->db->addQuotes( $rule )
 571                         )
 572                 );
 573                 $row = $this->db->fetchRow( $r );
 574                 if ( !$row ) {
 575                         return null;
 576                 }
 577                 $d = $row[0];
 578
 579                 return $d;
 580         }
 581
 582         protected function addSequence( $table, $pkey, $ns ) {
 583                 if ( !$this->db->sequenceExists( $ns ) ) {
 584                         $this->output( "Creating sequence $ns\n" );
 585                         $this->db->query( "CREATE SEQUENCE $ns" );
 586                         if ( $pkey !== false ) {
 587                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 588                         }
 589                 }
 590         }
 591
 592         protected function renameSequence( $old, $new ) {
 593                 if ( $this->db->sequenceExists( $new ) ) {
 594                         $this->output( "...sequence $new already exists.\n" );
 595
 596                         return;
 597                 }
 598                 if ( $this->db->sequenceExists( $old ) ) {
 599                         $this->output( "Renaming sequence $old to $new\n" );
 600                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 601                 }
 602         }
 603
 604         protected function renameTable( $old, $new, $patch = false ) {
 605                 if ( $this->db->tableExists( $old ) ) {
 606                         $this->output( "Renaming table $old to $new\n" );
 607                         $old = $this->db->realTableName( $old, "quoted" );
 608                         $new = $this->db->realTableName( $new, "quoted" );
 609                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 610                         if ( $patch !== false ) {
 611                                 $this->applyPatch( $patch );
 612                         }
 613                 }
 614         }
 615
 616         protected function renameIndex(
 617                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 618         ) {
 619                 // First requirement: the table must exist
 620                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 621                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 622
 623                         return;
 624                 }
 625
 626                 // Second requirement: the new index must be missing
 627                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 628                         $this->output( "...index $new already set on $table table.\n" );
 629                         if ( !$skipBothIndexExistWarning
 630                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 631                         ) {
 632                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 633                                         "renamed into $new (which also exists).\n" .
 634                                         "            $old should be manually removed if not needed anymore.\n" );
 635                         }
 636
 637                         return;
 638                 }
 639
 640                 // Third requirement: the old index must exist
 641                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 642                         $this->output( "...skipping: index $old doesn't exist.\n" );
 643
 644                         return;
 645                 }
 646
 647                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 648         }
 649
 650         protected function addPgField( $table, $field, $type ) {
 651                 $fi = $this->db->fieldInfo( $table, $field );
 652                 if ( !is_null( $fi ) ) {
 653                         $this->output( "...column '$table.$field' already exists\n" );
 654
 655                         return;
 656                 } else {
 657                         $this->output( "Adding column '$table.$field'\n" );
 658                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 659                 }
 660         }
 661
 662         protected function changeField( $table, $field, $newtype, $default ) {
 663                 $fi = $this->db->fieldInfo( $table, $field );
 664                 if ( is_null( $fi ) ) {
 665                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 666                         exit( 1 );
 667                 }
 668
 669                 if ( $fi->type() === $newtype ) {
 670                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 671                 } else {
 672                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 673                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 674                         if ( strlen( $default ) ) {
 675                                 $res = array();
 676                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 677                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 678                                         $this->db->query( $sqldef );
 679                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 680                                 }
 681                                 $sql .= " USING $default";
 682                         }
 683                         $this->db->query( $sql );
 684                 }
 685         }
 686
 687         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 688                 ## For a cache table, empty it if the field needs to be changed, because the old contents
 689                 ## may be corrupted.  If the column is already the desired type, refrain from purging.
 690                 $fi = $this->db->fieldInfo( $table, $field );
 691                 if ( is_null( $fi ) ) {
 692                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 693                         exit( 1 );
 694                 }
 695
 696                 if ( $fi->type() === $newtype ) {
 697                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 698                 } else {
 699                         $this->output( "Purging data from cache table '$table'\n" );
 700                         $this->db->query( "DELETE from $table" );
 701                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 702                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 703                         if ( strlen( $default ) ) {
 704                                 $res = array();
 705                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 706                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 707                                         $this->db->query( $sqldef );
 708                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 709                                 }
 710                                 $sql .= " USING $default";
 711                         }
 712                         $this->db->query( $sql );
 713                 }
 714         }
 715
 716         protected function setDefault( $table, $field, $default ) {
 717
 718                 $info = $this->db->fieldInfo( $table, $field );
 719                 if ( $info->defaultValue() !== $default ) {
 720                         $this->output( "Changing '$table.$field' default value\n" );
 721                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 722                 }
 723         }
 724
 725         protected function changeNullableField( $table, $field, $null ) {
 726                 $fi = $this->db->fieldInfo( $table, $field );
 727                 if ( is_null( $fi ) ) {
 728                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 729                         exit( 1 );
 730                 }
 731                 if ( $fi->isNullable() ) {
 732                         # # It's NULL - does it need to be NOT NULL?
 733                         if ( 'NOT NULL' === $null ) {
 734                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 735                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 736                         } else {
 737                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 738                         }
 739                 } else {
 740                         # # It's NOT NULL - does it need to be NULL?
 741                         if ( 'NULL' === $null ) {
 742                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 743                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 744                         } else {
 745                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 746                         }
 747                 }
 748         }
 749
 750         public function addPgIndex( $table, $index, $type ) {
 751                 if ( $this->db->indexExists( $table, $index ) ) {
 752                         $this->output( "...index '$index' on table '$table' already exists\n" );
 753                 } else {
 754                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 755                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 756                 }
 757         }
 758
 759         public function addPgExtIndex( $table, $index, $type ) {
 760                 if ( $this->db->indexExists( $table, $index ) ) {
 761                         $this->output( "...index '$index' on table '$table' already exists\n" );
 762                 } else {
 763                         if ( preg_match( '/^\(/', $type ) ) {
 764                                 $this->output( "Creating index '$index' on table '$table'\n" );
 765                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 766                         } else {
 767                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 768                         }
 769                 }
 770         }
 771
 772         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 773                 $fi = $this->db->fieldInfo( $table, $field );
 774                 if ( is_null( $fi ) ) {
 775                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 776                                 "Please report this.\n" );
 777
 778                         return;
 779                 }
 780                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 781                         return;
 782                 }
 783                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 784                 $conname = $fi->conname();
 785                 if ( $fi->conname() ) {
 786                         $conclause = "CONSTRAINT \"$conname\"";
 787                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 788                         $this->db->query( $command );
 789                 } else {
 790                         $this->output( "Column '$table.$field' does not have a foreign key " .
 791                                 "constraint, will be added\n" );
 792                         $conclause = "";
 793                 }
 794                 $command =
 795                         "ALTER TABLE $table ADD $conclause " .
 796                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 797                 $this->db->query( $command );
 798         }
 799
 800         protected function convertArchive2() {
 801                 if ( $this->db->tableExists( "archive2" ) ) {
 802                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 803                                 $this->output( "Dropping rule 'archive_insert'\n" );
 804                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 805                         }
 806                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 807                                 $this->output( "Dropping rule 'archive_delete'\n" );
 808                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 809                         }
 810                         $this->applyPatch(
 811                                 'patch-remove-archive2.sql',
 812                                 false,
 813                                 "Converting 'archive2' back to normal archive table"
 814                         );
 815                 } else {
 816                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 817                 }
 818         }
 819
 820         protected function checkOiDeleted() {
 821                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 822                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 823                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 824                         $this->db->query(
 825                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 826                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 827                 } else {
 828                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 829                 }
 830         }
 831
 832         protected function checkOiNameConstraint() {
 833                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 834                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 835                                 "foreign key to image\n" );
 836                 } else {
 837                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 838                                 $this->db->query(
 839                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 840                         }
 841                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 842                                 $this->db->query(
 843                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 844                         }
 845                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 846                         $this->db->query(
 847                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 848                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 849                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 850                 }
 851         }
 852
 853         protected function checkPageDeletedTrigger() {
 854                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 855                         $this->applyPatch(
 856                                 'patch-page_deleted.sql',
 857                                 false,
 858                                 "Adding function and trigger 'page_deleted' to table 'page'"
 859                         );
 860                 } else {
 861                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 862                 }
 863         }
 864
 865         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 866                 if ( $this->db->indexExists( $table, $index ) ) {
 867                         $this->output( "Dropping obsolete index '$index'\n" );
 868                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 869                 }
 870         }
 871
 872         protected function checkIndex( $index, $should_be, $good_def ) {
 873                 $pu = $this->db->indexAttributes( $index );
 874                 if ( !empty( $pu ) && $pu != $should_be ) {
 875                         $this->output( "Dropping obsolete version of index '$index'\n" );
 876                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 877                         $pu = array();
 878                 } else {
 879                         $this->output( "...no need to drop index '$index'\n" );
 880                 }
 881
 882                 if ( empty( $pu ) ) {
 883                         $this->output( "Creating index '$index'\n" );
 884                         $this->db->query( $good_def );
 885                 } else {
 886                         $this->output( "...index '$index' exists\n" );
 887                 }
 888         }
 889
 890         protected function checkRevUserFkey() {
 891                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 892                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 893                 } else {
 894                         $this->applyPatch(
 895                                 'patch-revision_rev_user_fkey.sql',
 896                                 false,
 897                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 898                         );
 899                 }
 900         }
 901
 902         protected function checkIwlPrefix() {
 903                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 904                         $this->applyPatch(
 905                                 'patch-rename-iwl_prefix.sql',
 906                                 false,
 907                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 908                         );
 909                 }
 910         }
 911
 912         protected function addInterwikiType() {
 913                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 914         }
 915
 916         protected function tsearchFixes() {
 917                 # Tweak the page_title tsearch2 trigger to filter out slashes
 918                 # This is create or replace, so harmless to call if not needed
 919                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 920
 921                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 922                 # in case they have the old 'default' versions
 923                 # Gather version numbers in case we need them
 924                 if ( $this->db->getServerVersion() >= 8.3 ) {
 925                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 926                 }
 927         }
 928 }