prepare SQL query only once, that's what prepared statements are for. Should...

prepare SQL query only once, that's what prepared statements are for. Should improve upgrade time with larger setups

apps/files/appinfo/update.php

@@ -5,10 +5,10 @@ $installedVersion=OCP\Config::getAppValue('files', 'installed_version');
 if (version_compare($installedVersion, '1.1.6', '<')) {
 	$query = OC_DB::prepare( "SELECT `propertyname`, `propertypath`, `userid` FROM `*PREFIX*properties`" );
 	$result = $query->execute();
+	$updateQuery = OC_DB::prepare('UPDATE `*PREFIX*properties` SET `propertyname` = ? WHERE `userid` = ? AND `propertypath` = ?');
 	while( $row = $result->fetchRow()) {
 		if ( $row["propertyname"][0] != '{' ) {
-			$query = OC_DB::prepare( 'UPDATE `*PREFIX*properties` SET `propertyname` = ? WHERE `userid` = ? AND `propertypath` = ?' );
-			$query->execute( array( '{DAV:}' + $row["propertyname"], $row["userid"], $row["propertypath"] ));
+			$updateQuery->execute(array('{DAV:}' + $row["propertyname"], $row["userid"], $row["propertypath"]));
 		}
 	}
 }