you can see the SAP_HANA_Security guide (S/4 HANA 1709 hana version 2.0 SPS03)https://help.sap.com/viewer/b3ee5778bc2e4a089d3299b82ec762a7/2.0.03/en-US/ddbdd66b632d4fe7b3c2e0e6e341e222.htmlSETKEYSets the entry key. NoteUnderscores, hyphens, periods, ...