includes/installer/OracleUpdater.php

   1 <?php
   2 /**
   3  * Oracle-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 Oracle databases.
  26  *
  27  * @ingroup Deployment
  28  * @since 1.17
  29  */
  30 class OracleUpdater extends DatabaseUpdater {
  31
  32         /**
  33          * Handle to the database subclass
  34          *
  35          * @var DatabaseOracle
  36          */
  37         protected $db;
  38
  39         protected function getCoreUpdateList() {
  40                 return array(
  41                         // 1.17
  42                         array( 'doNamespaceDefaults' ),
  43                         array( 'doFKRenameDeferr' ),
  44                         array( 'doFunctions17' ),
  45                         array( 'doSchemaUpgrade17' ),
  46                         array( 'doInsertPage0' ),
  47                         array( 'doRemoveNotNullEmptyDefaults' ),
  48                         array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
  49
  50                         //1.18
  51                         array( 'addIndex',      'user',          'i02',       'patch-user_email_index.sql' ),
  52                         array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
  53                         array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
  54                         array( 'doRecentchangesFK2Cascade' ),
  55
  56                         //1.19
  57                         array( 'addIndex', 'logging',       'i05',      'patch-logging_type_action_index.sql'),
  58                         array( 'addTable', 'globaltemplatelinks', 'patch-globaltemplatelinks.sql' ),
  59                         array( 'addTable', 'globalnamespaces', 'patch-globalnamespaces.sql' ),
  60                         array( 'addTable', 'globalinterwiki', 'patch-globalinterwiki.sql' ),
  61                         array( 'addField', 'revision', 'rev_sha1', 'patch-rev_sha1_field.sql' ),
  62                         array( 'addField', 'archive', 'ar_sha1', 'patch-ar_sha1_field.sql' ),
  63                         array( 'doRemoveNotNullEmptyDefaults2' ),
  64                         array( 'addIndex', 'page', 'i03', 'patch-page_redirect_namespace_len.sql' ),
  65                         array( 'modifyField', 'user', 'ug_group', 'patch-ug_group-length-increase.sql' ),
  66                         array( 'addField', 'uploadstash', 'us_chunk_inx', 'patch-us_chunk_inx_field.sql' ),
  67                         array( 'addField', 'job', 'job_timestamp', 'patch-job_timestamp_field.sql' ),
  68                         array( 'addIndex', 'job', 'i02', 'patch-job_timestamp_index.sql' ),
  69
  70                         //1.20
  71                         array( 'addTable', 'config', 'patch-config.sql' ),
  72
  73                         // KEEP THIS AT THE BOTTOM!!
  74                         array( 'doRebuildDuplicateFunction' ),
  75
  76                 );
  77         }
  78
  79         /**
  80          * MySQL uses datatype defaults for NULL inserted into NOT NULL fields
  81          * In namespace case that results into insert of 0 which is default namespace
  82          * Oracle inserts NULL, so namespace fields should have a default value
  83          */
  84         protected function doNamespaceDefaults() {
  85                 $meta = $this->db->fieldInfo( 'page', 'page_namespace' );
  86                 if ( $meta->defaultValue() != null ) {
  87                         return;
  88                 }
  89
  90                 $this->applyPatch( 'patch_namespace_defaults.sql', false, "Altering namespace fields with default value" );
  91         }
  92
  93         /**
  94          * Uniform FK names + deferrable state
  95          */
  96         protected function doFKRenameDeferr() {
  97                 $meta = $this->db->query( 'SELECT COUNT(*) cnt FROM user_constraints WHERE constraint_type = \'R\' AND deferrable = \'DEFERRABLE\'' );
  98                 $row = $meta->fetchRow();
  99                 if ( $row && $row['cnt'] > 0 ) {
 100                         return;
 101                 }
 102
 103                 $this->applyPatch( 'patch_fk_rename_deferred.sql', false, "Altering foreign keys ... " );
 104         }
 105
 106         /**
 107          * Recreate functions to 17 schema layout
 108          */
 109         protected function doFunctions17() {
 110                 $this->applyPatch( 'patch_create_17_functions.sql', false, "Recreating functions" );
 111         }
 112
 113         /**
 114          * Schema upgrade 16->17
 115          * there are no incremental patches prior to this
 116          */
 117         protected function doSchemaUpgrade17() {
 118                 // check if iwlinks table exists which was added in 1.17
 119                 if ( $this->db->tableExists( 'iwlinks' ) ) {
 120                         return;
 121                 }
 122                 $this->applyPatch( 'patch_16_17_schema_changes.sql', false, "Updating schema to 17" );
 123         }
 124
 125         /**
 126          * Insert page (page_id = 0) to prevent FK constraint violation
 127          */
 128         protected function doInsertPage0() {
 129                 $this->output( "Inserting page 0 if missing ... " );
 130                 $row = array(
 131                         'page_id' => 0,
 132                         'page_namespace' => 0,
 133                         'page_title' => ' ',
 134                         'page_counter' => 0,
 135                         'page_is_redirect' => 0,
 136                         'page_is_new' => 0,
 137                         'page_random' => 0,
 138                         'page_touched' => $this->db->timestamp(),
 139                         'page_latest' => 0,
 140                         'page_len' => 0
 141                 );
 142                 $this->db->insert( 'page', $row, 'OracleUpdater:doInserPage0', array( 'IGNORE' ) );
 143                 $this->output( "ok\n" );
 144         }
 145
 146         /**
 147          * Remove DEFAULT '' NOT NULL constraints from fields as '' is internally
 148          * converted to NULL in Oracle
 149          */
 150         protected function doRemoveNotNullEmptyDefaults() {
 151                 $meta = $this->db->fieldInfo( 'categorylinks' , 'cl_sortkey_prefix' );
 152                 if ( $meta->isNullable() ) {
 153                         return;
 154                 }
 155                 $this->applyPatch( 'patch_remove_not_null_empty_defs.sql', false, "Removing not null empty constraints" );
 156         }
 157
 158         protected function doRemoveNotNullEmptyDefaults2() {
 159                 $meta = $this->db->fieldInfo( 'ipblocks' , 'ipb_by_text' );
 160                 if ( $meta->isNullable() ) {
 161                         return;
 162                 }
 163                 $this->applyPatch( 'patch_remove_not_null_empty_defs2.sql', false, "Removing not null empty constraints" );
 164         }
 165
 166         /**
 167          * Removed forcing of invalid state on recentchanges_fk2.
 168          * cascading taken in account in the deleting function
 169          */
 170         protected function doRecentchangesFK2Cascade() {
 171                 $meta = $this->db->query( 'SELECT 1 FROM all_constraints WHERE owner = \''.strtoupper($this->db->getDBname()).'\' AND constraint_name = \''.$this->db->tablePrefix().'RECENTCHANGES_FK2\' AND delete_rule = \'CASCADE\'' );
 172                 $row = $meta->fetchRow();
 173                 if ( $row ) {
 174                         return;
 175                 }
 176
 177                 $this->applyPatch( 'patch_recentchanges_fk2_cascade.sql', false, "Altering RECENTCHANGES_FK2" );
 178         }
 179
 180         /**
 181          * rebuilding of the function that duplicates tables for tests
 182          */
 183         protected function doRebuildDuplicateFunction() {
 184                 $this->applyPatch( 'patch_rebuild_dupfunc.sql', false, "Rebuilding duplicate function" );
 185         }
 186
 187         /**
 188          * Overload: after this action field info table has to be rebuilt
 189          *
 190          * @param $what array
 191          */
 192         public function doUpdates( $what = array( 'core', 'extensions', 'purge', 'stats' ) ) {
 193                 parent::doUpdates( $what );
 194
 195                 $this->db->query( 'BEGIN fill_wiki_info; END;' );
 196         }
 197
 198         /**
 199          * Overload: because of the DDL_MODE tablename escaping is a bit dodgy
 200          */
 201         protected function purgeCache() {
 202                 # We can't guarantee that the user will be able to use TRUNCATE,
 203                 # but we know that DELETE is available to us
 204                 $this->output( "Purging caches..." );
 205                 $this->db->delete( '/*Q*/'.$this->db->tableName( 'objectcache' ), '*', __METHOD__ );
 206                 $this->output( "done.\n" );
 207         }
 208
 209 }