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',
 254                                 '(wl_user, wl_notificationtimestamp)' ),
 255                         array( 'addPgIndex', 'logging', 'logging_user_type_time',
 256                                 '(log_user, log_type, log_timestamp)' ),
 257                         array( 'addPgIndex', 'logging', 'logging_page_id_time', '(log_page,log_timestamp)' ),
 258                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_from_title', '(iwl_prefix, iwl_from, iwl_title)' ),
 259                         array( 'addPgIndex', 'iwlinks', 'iwl_prefix_title_from', '(iwl_prefix, iwl_title, iwl_from)' ),
 260                         array( 'addPgIndex', 'job', 'job_timestamp_idx', '(job_timestamp)' ),
 261                         array( 'addPgIndex', 'job', 'job_sha1', '(job_sha1)' ),
 262                         array( 'addPgIndex', 'job', 'job_cmd_token', '(job_cmd, job_token, job_random)' ),
 263                         array( 'addPgIndex', 'job', 'job_cmd_token_id', '(job_cmd, job_token, job_id)' ),
 264                         array( 'addPgIndex', 'filearchive', 'fa_sha1', '(fa_sha1)' ),
 265                         array( 'addPgIndex', 'logging', 'logging_user_text_type_time',
 266                                 '(log_user_text, log_type, log_timestamp)' ),
 267                         array( 'addPgIndex', 'logging', 'logging_user_text_time', '(log_user_text, log_timestamp)' ),
 268
 269                         array( 'checkIndex', 'pagelink_unique', array(
 270                                 array( 'pl_from', 'int4_ops', 'btree', 0 ),
 271                                 array( 'pl_namespace', 'int2_ops', 'btree', 0 ),
 272                                 array( 'pl_title', 'text_ops', 'btree', 0 ),
 273                         ),
 274                                 'CREATE UNIQUE INDEX pagelink_unique ON pagelinks (pl_from,pl_namespace,pl_title)' ),
 275                         array( 'checkIndex', 'cl_sortkey', array(
 276                                 array( 'cl_to', 'text_ops', 'btree', 0 ),
 277                                 array( 'cl_sortkey', 'text_ops', 'btree', 0 ),
 278                                 array( 'cl_from', 'int4_ops', 'btree', 0 ),
 279                         ),
 280                                 'CREATE INDEX cl_sortkey ON "categorylinks" ' .
 281                                         'USING "btree" ("cl_to", "cl_sortkey", "cl_from")' ),
 282                         array( 'checkIndex', 'iwl_prefix_title_from', array(
 283                                 array( 'iwl_prefix', 'text_ops', 'btree', 0 ),
 284                                 array( 'iwl_title', 'text_ops', 'btree', 0 ),
 285                                 array( 'iwl_from', 'int4_ops', 'btree', 0 ),
 286                         ),
 287                         'CREATE INDEX iwl_prefix_title_from ON "iwlinks" ' .
 288                                 'USING "btree" ("iwl_prefix", "iwl_title", "iwl_from")' ),
 289                         array( 'checkIndex', 'logging_times', array(
 290                                 array( 'log_timestamp', 'timestamptz_ops', 'btree', 0 ),
 291                         ),
 292                         'CREATE INDEX "logging_times" ON "logging" USING "btree" ("log_timestamp")' ),
 293                         array( 'dropIndex', 'oldimage', 'oi_name' ),
 294                         array( 'checkIndex', 'oi_name_archive_name', array(
 295                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 296                                 array( 'oi_archive_name', 'text_ops', 'btree', 0 ),
 297                         ),
 298                         'CREATE INDEX "oi_name_archive_name" ON "oldimage" ' .
 299                                 'USING "btree" ("oi_name", "oi_archive_name")' ),
 300                         array( 'checkIndex', 'oi_name_timestamp', array(
 301                                 array( 'oi_name', 'text_ops', 'btree', 0 ),
 302                                 array( 'oi_timestamp', 'timestamptz_ops', 'btree', 0 ),
 303                         ),
 304                         'CREATE INDEX "oi_name_timestamp" ON "oldimage" ' .
 305                                 'USING "btree" ("oi_name", "oi_timestamp")' ),
 306                         array( 'checkIndex', 'page_main_title', array(
 307                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 308                         ),
 309                         'CREATE INDEX "page_main_title" ON "page" ' .
 310                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 0)' ),
 311                         array( 'checkIndex', 'page_mediawiki_title', array(
 312                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 313                         ),
 314                         'CREATE INDEX "page_mediawiki_title" ON "page" ' .
 315                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ("page_namespace" = 8)' ),
 316                         array( 'checkIndex', 'page_project_title', array(
 317                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 318                         ),
 319                         'CREATE INDEX "page_project_title" ON "page" ' .
 320                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 321                                 'WHERE ("page_namespace" = 4)' ),
 322                         array( 'checkIndex', 'page_talk_title', array(
 323                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 324                         ),
 325                         'CREATE INDEX "page_talk_title" ON "page" ' .
 326                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 327                                 'WHERE ("page_namespace" = 1)' ),
 328                         array( 'checkIndex', 'page_user_title', array(
 329                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 330                         ),
 331                         'CREATE INDEX "page_user_title" ON "page" ' .
 332                                 'USING "btree" ("page_title" "text_pattern_ops") WHERE ' .
 333                                 '("page_namespace" = 2)' ),
 334                         array( 'checkIndex', 'page_utalk_title', array(
 335                                 array( 'page_title', 'text_pattern_ops', 'btree', 0 ),
 336                         ),
 337                         'CREATE INDEX "page_utalk_title" ON "page" ' .
 338                                 'USING "btree" ("page_title" "text_pattern_ops") ' .
 339                                 'WHERE ("page_namespace" = 3)' ),
 340                         array( 'checkIndex', 'ts2_page_text', array(
 341                                 array( 'textvector', 'tsvector_ops', 'gist', 0 ),
 342                         ),
 343                         'CREATE INDEX "ts2_page_text" ON "pagecontent" USING "gist" ("textvector")' ),
 344                         array( 'checkIndex', 'ts2_page_title', array(
 345                                 array( 'titlevector', 'tsvector_ops', 'gist', 0 ),
 346                         ),
 347                         'CREATE INDEX "ts2_page_title" ON "page" USING "gist" ("titlevector")' ),
 348
 349                         array( 'checkOiNameConstraint' ),
 350                         array( 'checkPageDeletedTrigger' ),
 351                         array( 'checkRevUserFkey' ),
 352                         array( 'dropIndex', 'ipblocks', 'ipb_address' ),
 353                         array( 'checkIndex', 'ipb_address_unique', array(
 354                                 array( 'ipb_address', 'text_ops', 'btree', 0 ),
 355                                 array( 'ipb_user', 'int4_ops', 'btree', 0 ),
 356                                 array( 'ipb_auto', 'int2_ops', 'btree', 0 ),
 357                                 array( 'ipb_anon_only', 'int2_ops', 'btree', 0 ),
 358                         ),
 359                         'CREATE UNIQUE INDEX ipb_address_unique ' .
 360                                 'ON ipblocks (ipb_address,ipb_user,ipb_auto,ipb_anon_only)' ),
 361
 362                         array( 'checkIwlPrefix' ),
 363
 364                         # All FK columns should be deferred
 365                         array( 'changeFkeyDeferrable', 'archive', 'ar_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 366                         array( 'changeFkeyDeferrable', 'categorylinks', 'cl_from', 'page(page_id) ON DELETE CASCADE' ),
 367                         array( 'changeFkeyDeferrable', 'externallinks', 'el_from', 'page(page_id) ON DELETE CASCADE' ),
 368                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_deleted_user',
 369                                 'mwuser(user_id) ON DELETE SET NULL' ),
 370                         array( 'changeFkeyDeferrable', 'filearchive', 'fa_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 371                         array( 'changeFkeyDeferrable', 'image', 'img_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 372                         array( 'changeFkeyDeferrable', 'imagelinks', 'il_from', 'page(page_id) ON DELETE CASCADE' ),
 373                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_by', 'mwuser(user_id) ON DELETE CASCADE' ),
 374                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 375                         array( 'changeFkeyDeferrable', 'ipblocks', 'ipb_parent_block_id',
 376                                 'ipblocks(ipb_id) ON DELETE SET NULL' ),
 377                         array( 'changeFkeyDeferrable', 'langlinks', 'll_from', 'page(page_id) ON DELETE CASCADE' ),
 378                         array( 'changeFkeyDeferrable', 'logging', 'log_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 379                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_name',
 380                                 'image(img_name) ON DELETE CASCADE ON UPDATE CASCADE' ),
 381                         array( 'changeFkeyDeferrable', 'oldimage', 'oi_user', 'mwuser(user_id) ON DELETE SET NULL' ),
 382                         array( 'changeFkeyDeferrable', 'pagelinks', 'pl_from', 'page(page_id) ON DELETE CASCADE' ),
 383                         array( 'changeFkeyDeferrable', 'page_props', 'pp_page', 'page (page_id) ON DELETE CASCADE' ),
 384                         array( 'changeFkeyDeferrable', 'page_restrictions', 'pr_page',
 385                                 'page(page_id) ON DELETE CASCADE' ),
 386                         array( 'changeFkeyDeferrable', 'protected_titles', 'pt_user',
 387                                 'mwuser(user_id) ON DELETE SET NULL' ),
 388                         array( 'changeFkeyDeferrable', 'recentchanges', 'rc_user',
 389                                 'mwuser(user_id) ON DELETE SET NULL' ),
 390                         array( 'changeFkeyDeferrable', 'redirect', 'rd_from', 'page(page_id) ON DELETE CASCADE' ),
 391                         array( 'changeFkeyDeferrable', 'revision', 'rev_page', 'page (page_id) ON DELETE CASCADE' ),
 392                         array( 'changeFkeyDeferrable', 'revision', 'rev_user', 'mwuser(user_id) ON DELETE RESTRICT' ),
 393                         array( 'changeFkeyDeferrable', 'templatelinks', 'tl_from', 'page(page_id) ON DELETE CASCADE' ),
 394                         array( 'changeFkeyDeferrable', 'user_groups', 'ug_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 395                         array( 'changeFkeyDeferrable', 'user_newtalk', 'user_id', 'mwuser(user_id) ON DELETE CASCADE' ),
 396                         array( 'changeFkeyDeferrable', 'user_properties', 'up_user',
 397                                 'mwuser(user_id) ON DELETE CASCADE' ),
 398                         array( 'changeFkeyDeferrable', 'watchlist', 'wl_user', 'mwuser(user_id) ON DELETE CASCADE' ),
 399
 400                         # r81574
 401                         array( 'addInterwikiType' ),
 402                         # end
 403                         array( 'tsearchFixes' ),
 404
 405                         // 1.23
 406                         array( 'addPgField', 'recentchanges', 'rc_source', "TEXT NOT NULL DEFAULT ''" ),
 407                         array( 'addPgField', 'page', 'page_links_updated', "TIMESTAMPTZ NULL" ),
 408                         array( 'addPgField', 'mwuser', 'user_password_expires', 'TIMESTAMPTZ NULL' ),
 409                         array( 'changeFieldPurgeTable', 'l10n_cache', 'lc_value', 'bytea',
 410                                 "replace(lc_value,'\','\\\\')::bytea" ),
 411                         // 1.23.9
 412                         array( 'rebuildTextSearch' ),
 413
 414                         // 1.24
 415                         array( 'addPgField', 'page_props', 'pp_sortkey', 'float NULL' ),
 416                         array( 'addPgIndex', 'page_props', 'pp_propname_sortkey_page',
 417                                         '( pp_propname, pp_sortkey, pp_page ) WHERE ( pp_sortkey IS NOT NULL )' ),
 418                         array( 'addPgField', 'page', 'page_lang', 'TEXT default NULL' ),
 419                         array( 'addPgField', 'pagelinks', 'pl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 420                         array( 'addPgField', 'templatelinks', 'tl_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 421                         array( 'addPgField', 'imagelinks', 'il_from_namespace', 'INTEGER NOT NULL DEFAULT 0' ),
 422
 423                         // 1.25
 424                         array( 'dropTable', 'hitcounter' ),
 425                         array( 'dropField', 'site_stats', 'ss_total_views', 'patch-drop-ss_total_views.sql' ),
 426                         array( 'dropField', 'page', 'page_counter', 'patch-drop-page_counter.sql' ),
 427                         array( 'dropFkey', 'recentchanges', 'rc_cur_id' )
 428                 );
 429         }
 430
 431         protected function getOldGlobalUpdates() {
 432                 global $wgExtNewTables, $wgExtPGNewFields, $wgExtPGAlteredFields, $wgExtNewIndexes;
 433
 434                 $updates = array();
 435
 436                 # Add missing extension tables
 437                 foreach ( $wgExtNewTables as $tableRecord ) {
 438                         $updates[] = array(
 439                                 'addTable', $tableRecord[0], $tableRecord[1], true
 440                         );
 441                 }
 442
 443                 # Add missing extension fields
 444                 foreach ( $wgExtPGNewFields as $fieldRecord ) {
 445                         $updates[] = array(
 446                                 'addPgField', $fieldRecord[0], $fieldRecord[1],
 447                                 $fieldRecord[2]
 448                         );
 449                 }
 450
 451                 # Change altered columns
 452                 foreach ( $wgExtPGAlteredFields as $fieldRecord ) {
 453                         $updates[] = array(
 454                                 'changeField', $fieldRecord[0], $fieldRecord[1],
 455                                 $fieldRecord[2]
 456                         );
 457                 }
 458
 459                 # Add missing extension indexes
 460                 foreach ( $wgExtNewIndexes as $fieldRecord ) {
 461                         $updates[] = array(
 462                                 'addPgExtIndex', $fieldRecord[0], $fieldRecord[1],
 463                                 $fieldRecord[2]
 464                         );
 465                 }
 466
 467                 return $updates;
 468         }
 469
 470         protected function describeTable( $table ) {
 471                 $q = <<<END
 472 SELECT attname, attnum FROM pg_namespace, pg_class, pg_attribute
 473         WHERE pg_class.relnamespace = pg_namespace.oid
 474           AND attrelid=pg_class.oid AND attnum > 0
 475           AND relname=%s AND nspname=%s
 476 END;
 477                 $res = $this->db->query( sprintf( $q,
 478                         $this->db->addQuotes( $table ),
 479                         $this->db->addQuotes( $this->db->getCoreSchema() ) ) );
 480                 if ( !$res ) {
 481                         return null;
 482                 }
 483
 484                 $cols = array();
 485                 foreach ( $res as $r ) {
 486                         $cols[] = array(
 487                                 "name" => $r[0],
 488                                 "ord" => $r[1],
 489                         );
 490                 }
 491
 492                 return $cols;
 493         }
 494
 495         function describeIndex( $idx ) {
 496                 // first fetch the key (which is a list of columns ords) and
 497                 // the table the index applies to (an oid)
 498                 $q = <<<END
 499 SELECT indkey, indrelid FROM pg_namespace, pg_class, pg_index
 500         WHERE nspname=%s
 501           AND pg_class.relnamespace = pg_namespace.oid
 502           AND relname=%s
 503           AND indexrelid=pg_class.oid
 504 END;
 505                 $res = $this->db->query(
 506                         sprintf(
 507                                 $q,
 508                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 509                                 $this->db->addQuotes( $idx )
 510                         )
 511                 );
 512                 if ( !$res ) {
 513                         return null;
 514                 }
 515                 $r = $this->db->fetchRow( $res );
 516                 if ( !$r ) {
 517                         return null;
 518                 }
 519
 520                 $indkey = $r[0];
 521                 $relid = intval( $r[1] );
 522                 $indkeys = explode( ' ', $indkey );
 523
 524                 $colnames = array();
 525                 foreach ( $indkeys as $rid ) {
 526                         $query = <<<END
 527 SELECT attname FROM pg_class, pg_attribute
 528         WHERE attrelid=$relid
 529           AND attnum=%d
 530           AND attrelid=pg_class.oid
 531 END;
 532                         $r2 = $this->db->query( sprintf( $query, $rid ) );
 533                         if ( !$r2 ) {
 534                                 return null;
 535                         }
 536                         $row2 = $this->db->fetchRow( $r2 );
 537                         if ( !$row2 ) {
 538                                 return null;
 539                         }
 540                         $colnames[] = $row2[0];
 541                 }
 542
 543                 return $colnames;
 544         }
 545
 546         function fkeyDeltype( $fkey ) {
 547                 $q = <<<END
 548 SELECT confdeltype FROM pg_constraint, pg_namespace
 549         WHERE connamespace=pg_namespace.oid
 550           AND nspname=%s
 551           AND conname=%s;
 552 END;
 553                 $r = $this->db->query(
 554                         sprintf(
 555                                 $q,
 556                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 557                                 $this->db->addQuotes( $fkey )
 558                         )
 559                 );
 560                 $row = $this->db->fetchRow( $r );
 561                 if ( !$row ) {
 562                         return null;
 563                 }
 564
 565                 return $row[0];
 566         }
 567
 568         function ruleDef( $table, $rule ) {
 569                 $q = <<<END
 570 SELECT definition FROM pg_rules
 571         WHERE schemaname = %s
 572           AND tablename = %s
 573           AND rulename = %s
 574 END;
 575                 $r = $this->db->query(
 576                         sprintf(
 577                                 $q,
 578                                 $this->db->addQuotes( $this->db->getCoreSchema() ),
 579                                 $this->db->addQuotes( $table ),
 580                                 $this->db->addQuotes( $rule )
 581                         )
 582                 );
 583                 $row = $this->db->fetchRow( $r );
 584                 if ( !$row ) {
 585                         return null;
 586                 }
 587                 $d = $row[0];
 588
 589                 return $d;
 590         }
 591
 592         protected function addSequence( $table, $pkey, $ns ) {
 593                 if ( !$this->db->sequenceExists( $ns ) ) {
 594                         $this->output( "Creating sequence $ns\n" );
 595                         $this->db->query( "CREATE SEQUENCE $ns" );
 596                         if ( $pkey !== false ) {
 597                                 $this->setDefault( $table, $pkey, '"nextval"(\'"' . $ns . '"\'::"regclass")' );
 598                         }
 599                 }
 600         }
 601
 602         protected function renameSequence( $old, $new ) {
 603                 if ( $this->db->sequenceExists( $new ) ) {
 604                         $this->output( "...sequence $new already exists.\n" );
 605
 606                         return;
 607                 }
 608                 if ( $this->db->sequenceExists( $old ) ) {
 609                         $this->output( "Renaming sequence $old to $new\n" );
 610                         $this->db->query( "ALTER SEQUENCE $old RENAME TO $new" );
 611                 }
 612         }
 613
 614         protected function renameTable( $old, $new, $patch = false ) {
 615                 if ( $this->db->tableExists( $old ) ) {
 616                         $this->output( "Renaming table $old to $new\n" );
 617                         $old = $this->db->realTableName( $old, "quoted" );
 618                         $new = $this->db->realTableName( $new, "quoted" );
 619                         $this->db->query( "ALTER TABLE $old RENAME TO $new" );
 620                         if ( $patch !== false ) {
 621                                 $this->applyPatch( $patch );
 622                         }
 623                 }
 624         }
 625
 626         protected function renameIndex(
 627                 $table, $old, $new, $skipBothIndexExistWarning = false, $a = false, $b = false
 628         ) {
 629                 // First requirement: the table must exist
 630                 if ( !$this->db->tableExists( $table, __METHOD__ ) ) {
 631                         $this->output( "...skipping: '$table' table doesn't exist yet.\n" );
 632
 633                         return;
 634                 }
 635
 636                 // Second requirement: the new index must be missing
 637                 if ( $this->db->indexExists( $table, $new, __METHOD__ ) ) {
 638                         $this->output( "...index $new already set on $table table.\n" );
 639                         if ( !$skipBothIndexExistWarning
 640                                 && $this->db->indexExists( $table, $old, __METHOD__ )
 641                         ) {
 642                                 $this->output( "...WARNING: $old still exists, despite it has been " .
 643                                         "renamed into $new (which also exists).\n" .
 644                                         "            $old should be manually removed if not needed anymore.\n" );
 645                         }
 646
 647                         return;
 648                 }
 649
 650                 // Third requirement: the old index must exist
 651                 if ( !$this->db->indexExists( $table, $old, __METHOD__ ) ) {
 652                         $this->output( "...skipping: index $old doesn't exist.\n" );
 653
 654                         return;
 655                 }
 656
 657                 $this->db->query( "ALTER INDEX $old RENAME TO $new" );
 658         }
 659
 660         protected function addPgField( $table, $field, $type ) {
 661                 $fi = $this->db->fieldInfo( $table, $field );
 662                 if ( !is_null( $fi ) ) {
 663                         $this->output( "...column '$table.$field' already exists\n" );
 664
 665                         return;
 666                 } else {
 667                         $this->output( "Adding column '$table.$field'\n" );
 668                         $this->db->query( "ALTER TABLE $table ADD $field $type" );
 669                 }
 670         }
 671
 672         protected function changeField( $table, $field, $newtype, $default ) {
 673                 $fi = $this->db->fieldInfo( $table, $field );
 674                 if ( is_null( $fi ) ) {
 675                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 676                         exit( 1 );
 677                 }
 678
 679                 if ( $fi->type() === $newtype ) {
 680                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 681                 } else {
 682                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 683                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 684                         if ( strlen( $default ) ) {
 685                                 $res = array();
 686                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 687                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 688                                         $this->db->query( $sqldef );
 689                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 690                                 }
 691                                 $sql .= " USING $default";
 692                         }
 693                         $this->db->query( $sql );
 694                 }
 695         }
 696
 697         protected function changeFieldPurgeTable( $table, $field, $newtype, $default ) {
 698                 # # For a cache table, empty it if the field needs to be changed, because the old contents
 699                 # # may be corrupted.  If the column is already the desired type, refrain from purging.
 700                 $fi = $this->db->fieldInfo( $table, $field );
 701                 if ( is_null( $fi ) ) {
 702                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 703                         exit( 1 );
 704                 }
 705
 706                 if ( $fi->type() === $newtype ) {
 707                         $this->output( "...column '$table.$field' is already of type '$newtype'\n" );
 708                 } else {
 709                         $this->output( "Purging data from cache table '$table'\n" );
 710                         $this->db->query( "DELETE from $table" );
 711                         $this->output( "Changing column type of '$table.$field' from '{$fi->type()}' to '$newtype'\n" );
 712                         $sql = "ALTER TABLE $table ALTER $field TYPE $newtype";
 713                         if ( strlen( $default ) ) {
 714                                 $res = array();
 715                                 if ( preg_match( '/DEFAULT (.+)/', $default, $res ) ) {
 716                                         $sqldef = "ALTER TABLE $table ALTER $field SET DEFAULT $res[1]";
 717                                         $this->db->query( $sqldef );
 718                                         $default = preg_replace( '/\s*DEFAULT .+/', '', $default );
 719                                 }
 720                                 $sql .= " USING $default";
 721                         }
 722                         $this->db->query( $sql );
 723                 }
 724         }
 725
 726         protected function setDefault( $table, $field, $default ) {
 727
 728                 $info = $this->db->fieldInfo( $table, $field );
 729                 if ( $info->defaultValue() !== $default ) {
 730                         $this->output( "Changing '$table.$field' default value\n" );
 731                         $this->db->query( "ALTER TABLE $table ALTER $field SET DEFAULT " . $default );
 732                 }
 733         }
 734
 735         protected function changeNullableField( $table, $field, $null ) {
 736                 $fi = $this->db->fieldInfo( $table, $field );
 737                 if ( is_null( $fi ) ) {
 738                         $this->output( "...ERROR: expected column $table.$field to exist\n" );
 739                         exit( 1 );
 740                 }
 741                 if ( $fi->isNullable() ) {
 742                         # # It's NULL - does it need to be NOT NULL?
 743                         if ( 'NOT NULL' === $null ) {
 744                                 $this->output( "Changing '$table.$field' to not allow NULLs\n" );
 745                                 $this->db->query( "ALTER TABLE $table ALTER $field SET NOT NULL" );
 746                         } else {
 747                                 $this->output( "...column '$table.$field' is already set as NULL\n" );
 748                         }
 749                 } else {
 750                         # # It's NOT NULL - does it need to be NULL?
 751                         if ( 'NULL' === $null ) {
 752                                 $this->output( "Changing '$table.$field' to allow NULLs\n" );
 753                                 $this->db->query( "ALTER TABLE $table ALTER $field DROP NOT NULL" );
 754                         } else {
 755                                 $this->output( "...column '$table.$field' is already set as NOT NULL\n" );
 756                         }
 757                 }
 758         }
 759
 760         public function addPgIndex( $table, $index, $type ) {
 761                 if ( $this->db->indexExists( $table, $index ) ) {
 762                         $this->output( "...index '$index' on table '$table' already exists\n" );
 763                 } else {
 764                         $this->output( "Creating index '$index' on table '$table' $type\n" );
 765                         $this->db->query( "CREATE INDEX $index ON $table $type" );
 766                 }
 767         }
 768
 769         public function addPgExtIndex( $table, $index, $type ) {
 770                 if ( $this->db->indexExists( $table, $index ) ) {
 771                         $this->output( "...index '$index' on table '$table' already exists\n" );
 772                 } else {
 773                         if ( preg_match( '/^\(/', $type ) ) {
 774                                 $this->output( "Creating index '$index' on table '$table'\n" );
 775                                 $this->db->query( "CREATE INDEX $index ON $table $type" );
 776                         } else {
 777                                 $this->applyPatch( $type, true, "Creating index '$index' on table '$table'" );
 778                         }
 779                 }
 780         }
 781
 782         protected function dropFkey( $table, $field ) {
 783                 $fi = $this->db->fieldInfo( $table, $field );
 784                 if ( is_null( $fi ) ) {
 785                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 786                                 "Please report this.\n" );
 787                         return;
 788                 }
 789                 $conname = $fi->conname();
 790                 if ( $fi->conname() ) {
 791                         $this->output( "Dropping foreign key constraint on '$table.$field'\n" );
 792                         $conclause = "CONSTRAINT \"$conname\"";
 793                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 794                         $this->db->query( $command );
 795                 } else {
 796                         $this->output( "...foreign key constraint on '$table.$field' already does not exist\n" );
 797                 };
 798         }
 799
 800         protected function changeFkeyDeferrable( $table, $field, $clause ) {
 801                 $fi = $this->db->fieldInfo( $table, $field );
 802                 if ( is_null( $fi ) ) {
 803                         $this->output( "WARNING! Column '$table.$field' does not exist but it should! " .
 804                                 "Please report this.\n" );
 805
 806                         return;
 807                 }
 808                 if ( $fi->is_deferred() && $fi->is_deferrable() ) {
 809                         return;
 810                 }
 811                 $this->output( "Altering column '$table.$field' to be DEFERRABLE INITIALLY DEFERRED\n" );
 812                 $conname = $fi->conname();
 813                 if ( $fi->conname() ) {
 814                         $conclause = "CONSTRAINT \"$conname\"";
 815                         $command = "ALTER TABLE $table DROP CONSTRAINT $conname";
 816                         $this->db->query( $command );
 817                 } else {
 818                         $this->output( "Column '$table.$field' does not have a foreign key " .
 819                                 "constraint, will be added\n" );
 820                         $conclause = "";
 821                 }
 822                 $command =
 823                         "ALTER TABLE $table ADD $conclause " .
 824                         "FOREIGN KEY ($field) REFERENCES $clause DEFERRABLE INITIALLY DEFERRED";
 825                 $this->db->query( $command );
 826         }
 827
 828         protected function convertArchive2() {
 829                 if ( $this->db->tableExists( "archive2" ) ) {
 830                         if ( $this->db->ruleExists( 'archive', 'archive_insert' ) ) {
 831                                 $this->output( "Dropping rule 'archive_insert'\n" );
 832                                 $this->db->query( 'DROP RULE archive_insert ON archive' );
 833                         }
 834                         if ( $this->db->ruleExists( 'archive', 'archive_delete' ) ) {
 835                                 $this->output( "Dropping rule 'archive_delete'\n" );
 836                                 $this->db->query( 'DROP RULE archive_delete ON archive' );
 837                         }
 838                         $this->applyPatch(
 839                                 'patch-remove-archive2.sql',
 840                                 false,
 841                                 "Converting 'archive2' back to normal archive table"
 842                         );
 843                 } else {
 844                         $this->output( "...obsolete table 'archive2' does not exist\n" );
 845                 }
 846         }
 847
 848         protected function checkOiDeleted() {
 849                 if ( $this->db->fieldInfo( 'oldimage', 'oi_deleted' )->type() !== 'smallint' ) {
 850                         $this->output( "Changing 'oldimage.oi_deleted' to type 'smallint'\n" );
 851                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted DROP DEFAULT" );
 852                         $this->db->query(
 853                                 "ALTER TABLE oldimage ALTER oi_deleted TYPE SMALLINT USING (oi_deleted::smallint)" );
 854                         $this->db->query( "ALTER TABLE oldimage ALTER oi_deleted SET DEFAULT 0" );
 855                 } else {
 856                         $this->output( "...column 'oldimage.oi_deleted' is already of type 'smallint'\n" );
 857                 }
 858         }
 859
 860         protected function checkOiNameConstraint() {
 861                 if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascaded" ) ) {
 862                         $this->output( "...table 'oldimage' has correct cascading delete/update " .
 863                                 "foreign key to image\n" );
 864                 } else {
 865                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey" ) ) {
 866                                 $this->db->query(
 867                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey" );
 868                         }
 869                         if ( $this->db->hasConstraint( "oldimage_oi_name_fkey_cascade" ) ) {
 870                                 $this->db->query(
 871                                         "ALTER TABLE oldimage DROP CONSTRAINT oldimage_oi_name_fkey_cascade" );
 872                         }
 873                         $this->output( "Making foreign key on table 'oldimage' (to image) a cascade delete/update\n" );
 874                         $this->db->query(
 875                                 "ALTER TABLE oldimage ADD CONSTRAINT oldimage_oi_name_fkey_cascaded " .
 876                                 "FOREIGN KEY (oi_name) REFERENCES image(img_name) " .
 877                                 "ON DELETE CASCADE ON UPDATE CASCADE" );
 878                 }
 879         }
 880
 881         protected function checkPageDeletedTrigger() {
 882                 if ( !$this->db->triggerExists( 'page', 'page_deleted' ) ) {
 883                         $this->applyPatch(
 884                                 'patch-page_deleted.sql',
 885                                 false,
 886                                 "Adding function and trigger 'page_deleted' to table 'page'"
 887                         );
 888                 } else {
 889                         $this->output( "...table 'page' has 'page_deleted' trigger\n" );
 890                 }
 891         }
 892
 893         protected function dropIndex( $table, $index, $patch = '', $fullpath = false ) {
 894                 if ( $this->db->indexExists( $table, $index ) ) {
 895                         $this->output( "Dropping obsolete index '$index'\n" );
 896                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 897                 }
 898         }
 899
 900         protected function checkIndex( $index, $should_be, $good_def ) {
 901                 $pu = $this->db->indexAttributes( $index );
 902                 if ( !empty( $pu ) && $pu != $should_be ) {
 903                         $this->output( "Dropping obsolete version of index '$index'\n" );
 904                         $this->db->query( "DROP INDEX \"" . $index . "\"" );
 905                         $pu = array();
 906                 } else {
 907                         $this->output( "...no need to drop index '$index'\n" );
 908                 }
 909
 910                 if ( empty( $pu ) ) {
 911                         $this->output( "Creating index '$index'\n" );
 912                         $this->db->query( $good_def );
 913                 } else {
 914                         $this->output( "...index '$index' exists\n" );
 915                 }
 916         }
 917
 918         protected function checkRevUserFkey() {
 919                 if ( $this->fkeyDeltype( 'revision_rev_user_fkey' ) == 'r' ) {
 920                         $this->output( "...constraint 'revision_rev_user_fkey' is ON DELETE RESTRICT\n" );
 921                 } else {
 922                         $this->applyPatch(
 923                                 'patch-revision_rev_user_fkey.sql',
 924                                 false,
 925                                 "Changing constraint 'revision_rev_user_fkey' to ON DELETE RESTRICT"
 926                         );
 927                 }
 928         }
 929
 930         protected function checkIwlPrefix() {
 931                 if ( $this->db->indexExists( 'iwlinks', 'iwl_prefix' ) ) {
 932                         $this->applyPatch(
 933                                 'patch-rename-iwl_prefix.sql',
 934                                 false,
 935                                 "Replacing index 'iwl_prefix' with 'iwl_prefix_title_from'"
 936                         );
 937                 }
 938         }
 939
 940         protected function addInterwikiType() {
 941                 $this->applyPatch( 'patch-add_interwiki.sql', false, "Refreshing add_interwiki()" );
 942         }
 943
 944         protected function tsearchFixes() {
 945                 # Tweak the page_title tsearch2 trigger to filter out slashes
 946                 # This is create or replace, so harmless to call if not needed
 947                 $this->applyPatch( 'patch-ts2pagetitle.sql', false, "Refreshing ts2_page_title()" );
 948
 949                 # If the server is 8.3 or higher, rewrite the tsearch2 triggers
 950                 # in case they have the old 'default' versions
 951                 # Gather version numbers in case we need them
 952                 if ( $this->db->getServerVersion() >= 8.3 ) {
 953                         $this->applyPatch( 'patch-tsearch2funcs.sql', false, "Rewriting tsearch2 triggers" );
 954                 }
 955         }
 956
 957         protected function rebuildTextSearch() {
 958                 if ( $this->updateRowExists( 'patch-textsearch_bug66650.sql' ) ) {
 959                         $this->output( "...bug 66650 already fixed or not applicable.\n" );
 960                         return true;
 961                 };
 962                 $this->applyPatch( 'patch-textsearch_bug66650.sql', false,
 963                         'Rebuilding text search for bug 66650' );
 964         }
 965 }