Regarding the following document, SAP ASE stores empty string as a single space.
This is a feature of SAP ASE database which prevents Toad Data Point to process the request as expected.
WORKAROUND:
Use Data Compare directly from the Editor. You can use SQL with checking/filtering values with whitespaces and do Data Compare with results
STATUS:
Enhancement request QAT-13475 has been submitted to Development for consideration in a future release of Toad Data Point.