How to convert GUID between raw16 and char32

Hi,

is it possible in HANA XS or in javascript to convert a GUID between raw16 and char32 format? In my case we have different tables that store the same guid with different formats. In other cases I need to call a Webservice via key 32 guid but only have the raw 16 guid read from the DB.

So how could I convert this raw16 guid into char32 without using ABAP in a two tier architecture, i.e. via XS or JS?

The SAP HANA Developer Guide shows the raw and the rawtohex or hextoraw functions (page 215), but I receive error message when using them. Do they really exist? And how do they work?

Thanks and regards,

Ulf