MediaWiki 1.17.0

[autoinstallsdev/mediawiki.git] / includes / installer / OracleUpdater.php

diff --git a/includes/installer/OracleUpdater.php b/includes/installer/OracleUpdater.php
new file mode 100644 (file)
index 0000000..4d85924
--- /dev/null
+++ b/includes/installer/OracleUpdater.php
@@ -0,0 +1,114 @@
+<?php
+/**
+ * Oracle-specific updater.
+ *
+ * @file
+ * @ingroup Deployment
+ */
+
+/**
+ * Class for handling updates to Oracle databases.
+ *
+ * @ingroup Deployment
+ * @since 1.17
+ */
+class OracleUpdater extends DatabaseUpdater {
+       protected function getCoreUpdateList() {
+               return array(
+                       // 1.16
+                       array( 'doNamespaceDefaults' ),
+                       array( 'doFKRenameDeferr' ),
+                       array( 'doFunctions17' ),
+                       array( 'doSchemaUpgrade17' ),
+                       array( 'doInsertPage0' ),
+               );
+       }
+
+       /**
+        * MySQL uses datatype defaults for NULL inserted into NOT NULL fields
+        * In namespace case that results into insert of 0 which is default namespace
+        * Oracle inserts NULL, so namespace fields should have a default value
+        */
+       protected function doNamespaceDefaults() {
+               $this->output( "Altering namespace fields with default value ... " );
+               $meta = $this->db->fieldInfo( 'page', 'page_namespace' );
+               if ( $meta->defaultValue() != null ) {
+                       $this->output( "defaults seem to present on namespace fields\n" );
+                       return;
+               }
+
+               $this->applyPatch( 'patch_namespace_defaults.sql', false );
+               $this->output( "ok\n" );
+       }
+
+       /**
+        * Uniform FK names + deferrable state
+        */
+       protected function doFKRenameDeferr() {
+               $this->output( "Altering foreign keys ... " );
+               $meta = $this->db->query( 'SELECT COUNT(*) cnt FROM user_constraints WHERE constraint_type = \'R\' AND deferrable = \'DEFERRABLE\'' );
+               $row = $meta->fetchRow();
+               if ( $row && $row['cnt'] > 0 ) {
+                       $this->output( "at least one FK is deferrable, considering up to date\n" );
+                       return;
+               }
+
+               $this->applyPatch( 'patch_fk_rename_deferred.sql', false );
+               $this->output( "ok\n" );
+       }
+
+       /**
+        * Recreate functions to 17 schema layout
+        */
+       protected function doFunctions17() {
+               $this->output( "Recreating functions ... " );
+               $this->applyPatch( 'patch_create_17_functions.sql', false );
+               $this->output( "ok\n" );
+       }
+
+       /**
+        * Schema upgrade 16->17
+        * there are no incremental patches prior to this
+        */
+       protected function doSchemaUpgrade17() {
+               $this->output( "Updating schema to 17 ... " );
+               // check if iwlinks table exists which was added in 1.17
+               if ( $this->db->tableExists( $this->db->tableName( 'iwlinks' ) ) ) {
+                       $this->output( "schema seem to be up to date.\n" );
+                       return;
+               }
+               $this->applyPatch( 'patch_16_17_schema_changes.sql', false );
+               $this->output( "ok\n" );
+       }
+
+       /**
+        * Insert page (page_id = 0) to prevent FK constraint violation
+        */
+       protected function doInsertPage0() {
+               $this->output( "Inserting page 0 if missing ... " );
+               $row = array(
+                       'page_id' => 0,
+                       'page_namespace' => 0,
+                       'page_title' => ' ',
+                       'page_counter' => 0,
+                       'page_is_redirect' => 0,
+                       'page_is_new' => 0,
+                       'page_random' => 0,
+                       'page_touched' => $this->db->timestamp(),
+                       'page_latest' => 0,
+                       'page_len' => 0
+               );
+               $this->db->insert( 'page', $row, 'OracleUpdater:doInserPage0', array( 'IGNORE' ) );
+               $this->output( "ok\n" );
+       }
+
+       /**
+        * Overload: after this action field info table has to be rebuilt
+        */
+       public function doUpdates( $what = array( 'core', 'extensions', 'purge' ) ) {
+               parent::doUpdates( $what );
+
+               $this->db->query( 'BEGIN fill_wiki_info; END;' );
+       }
+
+}