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   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              array( 'disableContentHandlerUseDB' ),
  42  
  43              // 1.17
  44              array( 'doNamespaceDefaults' ),
  45              array( 'doFKRenameDeferr' ),
  46              array( 'doFunctions17' ),
  47              array( 'doSchemaUpgrade17' ),
  48              array( 'doInsertPage0' ),
  49              array( 'doRemoveNotNullEmptyDefaults' ),
  50              array( 'addTable', 'user_former_groups', 'patch-user_former_groups.sql' ),
  51  
  52              // 1.18
  53              array( 'addIndex', 'user', 'i02', 'patch-user_email_index.sql' ),
  54              array( 'modifyField', 'user_properties', 'up_property', 'patch-up_property.sql' ),
  55              array( 'addTable', 'uploadstash', 'patch-uploadstash.sql' ),
  56              array( 'doRecentchangesFK2Cascade' ),
  57  
  58              // 1.19
  59              array( 'addIndex', 'logging', 'i05', 'patch-logging_type_action_index.sql' ),
  60              array( 'addField', 'revision', 'rev_sha1', 'patch-rev_sha1_field.sql' ),
  61              array( 'addField', 'archive', 'ar_sha1', 'patch-ar_sha1_field.sql' ),
  62              array( 'doRemoveNotNullEmptyDefaults2' ),
  63              array( 'addIndex', 'page', 'i03', 'patch-page_redirect_namespace_len.sql' ),
  64              array( 'addField', 'uploadstash', 'us_chunk_inx', 'patch-us_chunk_inx_field.sql' ),
  65              array( 'addField', 'job', 'job_timestamp', 'patch-job_timestamp_field.sql' ),
  66              array( 'addIndex', 'job', 'i02', 'patch-job_timestamp_index.sql' ),
  67              array( 'doPageRestrictionsPKUKFix' ),
  68  
  69              // 1.20
  70              array( 'addIndex', 'ipblocks', 'i05', 'patch-ipblocks_i05_index.sql' ),
  71              array( 'addIndex', 'revision', 'i05', 'patch-revision_i05_index.sql' ),
  72              array( 'dropField', 'category', 'cat_hidden', 'patch-cat_hidden.sql' ),
  73  
  74              // 1.21
  75              array( 'addField', 'revision', 'rev_content_format',
  76                  'patch-revision-rev_content_format.sql' ),
  77              array( 'addField', 'revision', 'rev_content_model',
  78                  'patch-revision-rev_content_model.sql' ),
  79              array( 'addField', 'archive', 'ar_content_format', 'patch-archive-ar_content_format.sql' ),
  80              array( 'addField', 'archive', 'ar_content_model', 'patch-archive-ar_content_model.sql' ),
  81              array( 'addField', 'archive', 'ar_id', 'patch-archive-ar_id.sql' ),
  82              array( 'addField', 'externallinks', 'el_id', 'patch-externallinks-el_id.sql' ),
  83              array( 'addField', 'page', 'page_content_model', 'patch-page-page_content_model.sql' ),
  84              array( 'enableContentHandlerUseDB' ),
  85              array( 'dropField', 'site_stats', 'ss_admins', 'patch-ss_admins.sql' ),
  86              array( 'dropField', 'recentchanges', 'rc_moved_to_title', 'patch-rc_moved.sql' ),
  87              array( 'addTable', 'sites', 'patch-sites.sql' ),
  88              array( 'addField', 'filearchive', 'fa_sha1', 'patch-fa_sha1.sql' ),
  89              array( 'addField', 'job', 'job_token', 'patch-job_token.sql' ),
  90              array( 'addField', 'job', 'job_attempts', 'patch-job_attempts.sql' ),
  91              array( 'addField', 'uploadstash', 'us_props', 'patch-uploadstash-us_props.sql' ),
  92              array( 'modifyField', 'user_groups', 'ug_group', 'patch-ug_group-length-increase-255.sql' ),
  93              array( 'modifyField', 'user_former_groups', 'ufg_group',
  94                  'patch-ufg_group-length-increase-255.sql' ),
  95  
  96              // 1.23
  97              array( 'addIndex', 'logging', 'i06', 'patch-logging_user_text_type_time_index.sql' ),
  98              array( 'addIndex', 'logging', 'i07', 'patch-logging_user_text_time_index.sql' ),
  99              array( 'addField', 'user', 'user_password_expires', 'patch-user_password_expire.sql' ),
 100              array( 'addField', 'page', 'page_links_updated', 'patch-page_links_updated.sql' ),
 101              array( 'addField', 'recentchanges', 'rc_source', 'patch-rc_source.sql' ),
 102  
 103              // 1.24
 104              array( 'addField', 'page', 'page_lang', 'patch-page-page_lang.sql' ),
 105  
 106              // KEEP THIS AT THE BOTTOM!!
 107              array( 'doRebuildDuplicateFunction' ),
 108  
 109          );
 110      }
 111  
 112      /**
 113       * MySQL uses datatype defaults for NULL inserted into NOT NULL fields
 114       * In namespace case that results into insert of 0 which is default namespace
 115       * Oracle inserts NULL, so namespace fields should have a default value
 116       */
 117  	protected function doNamespaceDefaults() {
 118          $meta = $this->db->fieldInfo( 'page', 'page_namespace' );
 119          if ( $meta->defaultValue() != null ) {
 120              return;
 121          }
 122  
 123          $this->applyPatch(
 124              'patch_namespace_defaults.sql',
 125              false,
 126              'Altering namespace fields with default value'
 127          );
 128      }
 129  
 130      /**
 131       * Uniform FK names + deferrable state
 132       */
 133  	protected function doFKRenameDeferr() {
 134          $meta = $this->db->query( '
 135              SELECT COUNT(*) cnt
 136              FROM user_constraints
 137              WHERE constraint_type = \'R\' AND deferrable = \'DEFERRABLE\''
 138          );
 139          $row = $meta->fetchRow();
 140          if ( $row && $row['cnt'] > 0 ) {
 141              return;
 142          }
 143  
 144          $this->applyPatch( 'patch_fk_rename_deferred.sql', false, "Altering foreign keys ... " );
 145      }
 146  
 147      /**
 148       * Recreate functions to 17 schema layout
 149       */
 150  	protected function doFunctions17() {
 151          $this->applyPatch( 'patch_create_17_functions.sql', false, "Recreating functions" );
 152      }
 153  
 154      /**
 155       * Schema upgrade 16->17
 156       * there are no incremental patches prior to this
 157       */
 158  	protected function doSchemaUpgrade17() {
 159          // check if iwlinks table exists which was added in 1.17
 160          if ( $this->db->tableExists( 'iwlinks' ) ) {
 161              return;
 162          }
 163          $this->applyPatch( 'patch_16_17_schema_changes.sql', false, "Updating schema to 17" );
 164      }
 165  
 166      /**
 167       * Insert page (page_id = 0) to prevent FK constraint violation
 168       */
 169  	protected function doInsertPage0() {
 170          $this->output( "Inserting page 0 if missing ... " );
 171          $row = array(
 172              'page_id' => 0,
 173              'page_namespace' => 0,
 174              'page_title' => ' ',
 175              'page_counter' => 0,
 176              'page_is_redirect' => 0,
 177              'page_is_new' => 0,
 178              'page_random' => 0,
 179              'page_touched' => $this->db->timestamp(),
 180              'page_latest' => 0,
 181              'page_len' => 0
 182          );
 183          $this->db->insert( 'page', $row, 'OracleUpdater:doInserPage0', array( 'IGNORE' ) );
 184          $this->output( "ok\n" );
 185      }
 186  
 187      /**
 188       * Remove DEFAULT '' NOT NULL constraints from fields as '' is internally
 189       * converted to NULL in Oracle
 190       */
 191  	protected function doRemoveNotNullEmptyDefaults() {
 192          $meta = $this->db->fieldInfo( 'categorylinks', 'cl_sortkey_prefix' );
 193          if ( $meta->isNullable() ) {
 194              return;
 195          }
 196          $this->applyPatch(
 197              'patch_remove_not_null_empty_defs.sql',
 198              false,
 199              'Removing not null empty constraints'
 200          );
 201      }
 202  
 203  	protected function doRemoveNotNullEmptyDefaults2() {
 204          $meta = $this->db->fieldInfo( 'ipblocks', 'ipb_by_text' );
 205          if ( $meta->isNullable() ) {
 206              return;
 207          }
 208          $this->applyPatch(
 209              'patch_remove_not_null_empty_defs2.sql',
 210              false,
 211              'Removing not null empty constraints'
 212          );
 213      }
 214  
 215      /**
 216       * Removed forcing of invalid state on recentchanges_fk2.
 217       * cascading taken in account in the deleting function
 218       */
 219  	protected function doRecentchangesFK2Cascade() {
 220          $meta = $this->db->query( 'SELECT 1 FROM all_constraints WHERE owner = \'' .
 221              strtoupper( $this->db->getDBname() ) .
 222              '\' AND constraint_name = \'' .
 223              $this->db->tablePrefix() .
 224              'RECENTCHANGES_FK2\' AND delete_rule = \'CASCADE\''
 225          );
 226          $row = $meta->fetchRow();
 227          if ( $row ) {
 228              return;
 229          }
 230  
 231          $this->applyPatch( 'patch_recentchanges_fk2_cascade.sql', false, "Altering RECENTCHANGES_FK2" );
 232      }
 233  
 234      /**
 235       * Fixed wrong PK, UK definition
 236       */
 237  	protected function doPageRestrictionsPKUKFix() {
 238          $this->output( "Altering PAGE_RESTRICTIONS keys ... " );
 239  
 240          $meta = $this->db->query( 'SELECT column_name FROM all_cons_columns WHERE owner = \'' .
 241              strtoupper( $this->db->getDBname() ) .
 242              '\' AND constraint_name = \'' .
 243              $this->db->tablePrefix() .
 244              'PAGE_RESTRICTIONS_PK\' AND rownum = 1'
 245          );
 246          $row = $meta->fetchRow();
 247          if ( $row['column_name'] == 'PR_ID' ) {
 248              $this->output( "seems to be up to date.\n" );
 249  
 250              return;
 251          }
 252  
 253          $this->applyPatch( 'patch-page_restrictions_pkuk_fix.sql', false );
 254          $this->output( "ok\n" );
 255      }
 256  
 257      /**
 258       * rebuilding of the function that duplicates tables for tests
 259       */
 260  	protected function doRebuildDuplicateFunction() {
 261          $this->applyPatch( 'patch_rebuild_dupfunc.sql', false, "Rebuilding duplicate function" );
 262      }
 263  
 264      /**
 265       * Overload: after this action field info table has to be rebuilt
 266       *
 267       * @param array $what
 268       */
 269  	public function doUpdates( $what = array( 'core', 'extensions', 'purge', 'stats' ) ) {
 270          parent::doUpdates( $what );
 271  
 272          $this->db->query( 'BEGIN fill_wiki_info; END;' );
 273      }
 274  
 275      /**
 276       * Overload: because of the DDL_MODE tablename escaping is a bit dodgy
 277       */
 278  	public function purgeCache() {
 279          # We can't guarantee that the user will be able to use TRUNCATE,
 280          # but we know that DELETE is available to us
 281          $this->output( "Purging caches..." );
 282          $this->db->delete( '/*Q*/' . $this->db->tableName( 'objectcache' ), '*', __METHOD__ );
 283          $this->output( "done.\n" );
 284      }
 285  }