SAP HANA System Generated Schemas

_SYS_BIC:

This schema contains all the columns views of activated objects. When the user activates the Attribute View/Analytic View/Calculation View/Analytic Privilege /Procedure, the respective run-time objects are created under _SYS_BIC/ Column Views.

_SYS_REPO:

Whatever the objects are there in the system is available in repository. This schema contains the list of Activated objects, Inactive Objects, Package details and Runtime Objects information etc.
Also _SYS_REPO user must have SELECT privilege with grant option on the data schama.
Read more about "GRANT SELECT PRIVILEGE ON _SYS_REPO"

_SYS_BI:

This schema stores all the metadata of created column Views. It contains the tables for created Variables, Time Data (Fiscal, Gregorian), Schema Mapping and Content Mapping tables.

_SYS_STATISTICS:

This schema contains all the system configurations and parameters.

_SYS_XS:

This schema is used for SAP HANA Extended Application Services.