+/**
+ * Execute changes made in WordPress 3.4.
+ *
+ * @since 3.4.0
+ */
+function upgrade_340() {
+ global $wp_current_db_version, $wpdb;
+
+ if ( $wp_current_db_version < 19798 ) {
+ $wpdb->hide_errors();
+ $wpdb->query( "ALTER TABLE $wpdb->options DROP COLUMN blog_id" );
+ $wpdb->show_errors();
+ }
+
+ if ( $wp_current_db_version < 19799 ) {
+ $wpdb->hide_errors();
+ $wpdb->query("ALTER TABLE $wpdb->comments DROP INDEX comment_approved");
+ $wpdb->show_errors();
+ }
+
+ if ( $wp_current_db_version < 20022 && is_main_site() && ! defined( 'DO_NOT_UPGRADE_GLOBAL_TABLES' ) ) {
+ $wpdb->query( "DELETE FROM $wpdb->usermeta WHERE meta_key = 'themes_last_view'" );
+ }
+
+ if ( $wp_current_db_version < 20080 ) {
+ if ( 'yes' == $wpdb->get_var( "SELECT autoload FROM $wpdb->options WHERE option_name = 'uninstall_plugins'" ) ) {
+ $uninstall_plugins = get_option( 'uninstall_plugins' );
+ delete_option( 'uninstall_plugins' );
+ add_option( 'uninstall_plugins', $uninstall_plugins, null, 'no' );
+ }
+ }
+}
+