Technology Blogs by SAP
Learn how to extend and personalize SAP applications. Follow the SAP technology blog for insights into SAP BTP, ABAP, SAP Analytics Cloud, SAP HANA, and more.
Showing results for 
Search instead for 
Did you mean: 
Product and Topic Expert
Product and Topic Expert

LATEST UPDATE: September 1, 2020 =========================================

The SAP Cloud Platform, SAP HANA Service will be retired in 2021. For more information, see

For the latest information about SAP HANA database-as-a-service, visit our blog post series about SAP HANA Cloud:


Data masking provides an additional layer of object-level access control, for example to complement SELECT privileges. Regular object-level access control privileges return either a result set or an error: insufficient privileges. With data masking, a result set is always returned. However, unless the user has the UNMASKED object-level privilege, the data will be hidden as defined by the mask.

Different implementations are possible. Below a simple example.

For an introduction of the data masking feature, see the blogs from Aleks Aleksic:

Tutorial Video

In the video tutorial below, we demonstrate how to implement data masking.

Data Masking for the SAP Cloud Platform, SAP HANA Service works the same as for a regular on-premise SAP HANA versions, like the platform and express edition.

Data masking was introduced with SAP HANA 2.0 SPS 01 (April, 2017) and is not available for the SAP HANA Service in the Neo environment, currently on version SAP HANA 1.0 SPS 12.

Code Sample

For the full code sample, see the repository on the SAP HANA Academy GitHub site. Below the most essential parts. This is a sample implementation. Other approaches are possible.

Here we create a function which will perform the actual masking when called.
CONNECT mask_owner PASSWORD ******
temp VARCHAR(19);
INTO temp
OUTPUT := temp;

GRANT EXECUTE ON credit_mask TO data_owner;

Next, as the object owner of the table with sensitive data, we create a view which calls the mask.
CONNECT data_owner PASSWORD ******
CREATE VIEW credit_view AS
SELECT * FROM credit_tab
(CREDIT_CARD USING mask_owner.credit_mask(credit_card));

GRANT SELECT ON credit_view TO end_user;

Finally, as end_user we query the view and get a result set with masked data for the credit card column.

Granting the UNMASKED object privilege to the user returns an unmasked view on the data.
CONNECT data_owner PASSWORD ****
GRANT UNMASKED ON credit_view TO end_user;

YouTube Playlist(s)

The tutorials has been posted to the following playlists:


For the GitHub code repository, see

For the documentation, see

Thank you for watching

The SAP HANA Academy provides free online video tutorials for the developers, consultants, partners and customers of SAP HANA.

Topics range from practical how-to instructions on administration, data loading and modeling, and integration with other SAP solutions, to more conceptual projects to help build out new solutions using mobile applications or predictive analysis.

For the full library, see SAP HANA Academy Library - by the SAP HANA Academy.

For the full list of blogs, see Blog Posts - by the SAP HANA Academy.