1 files changed, 114 insertions, 0 deletions
diff --git a/includes/installer/OracleUpdater.php b/includes/installer/OracleUpdater.php
new file mode 100644
index 00000000..4d85924e
--- /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;' );
+	}
+
+}