How to link table TPSASTAGE and MATKEY in SQVI?

Dear all,

I'm trying to export current 'PSA Assignment to Bin by Entitled/Product' list to Excel so I can search speicfic product. When I try to use SQVI to do this, I found MATID in table TPSASTAGE is 32 characters while MATID in table MATKEY is 22.

I checked previous discussion and found there is a function /SCMB/MDL_GUID_CONVERT can be used to convert between these two formats. But how could I do it in SQVI? I do not have authorization to create query by SP01 or SP02.

Thanks for any help.