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Remember: Schema mapping only applies to references from repository objects to catalog objects. It is
not intended to be used for repository to repository references.
Restriction: You need to map the references of script-based calculation views and procedures manually,
that is, by changing the script.
You can map several authoring schemas to the same physical schema. For example, content objects delivered by
SAP refer to different authoring schemas, whereas in the customer system, all these authoring schemas are
mapped to a single physical schema where the tables are replicated.
Remember: The mapping between authoring and physical schema is stored in the configuration table
“_SYS_BI”.”M_SCHEMA_MAPPING”
Note:
● In a system having no schema mapping, the authoring schema is filled 1:1 from the physical schema
otherwise it would not be possible to change the default schema.
● In a system if authoring schema mapping is found, it is checked that whether the current authoring
schema is mapped to the current physical schema as follows: If yes, nothing is done. If not (including
an empty authoring schema case), then the authoring schema is filled. With the backwards mapped
authoring schema if there is a 1:1 mapping i.e. only one authoring schema was found. With this we
simplify the mapping table in customer systems because even for enhancements the content schema
is kept and no additional mapping must be introduced if the customer transports from development
to production With the physical schema in case no or more than one authoring schemas are found.
This indicates that the customer has changed the schema-dependent parts and that therefore his
physical schema is stored also in the authoring schema.
Example use case: Lets assume we have only SAP_ERP -> ERP in the mapping table and an analytic
view having defaultSchema = SAP_ERP. Let's assume the customer changes the defaultSchema to
CUS. Since CUS has no mapping the authoringSchema of the defaultSchema is set to CUS as well.
Then the customer changes the defaultSchema back to ERP. A 1:1 mapping for ERP is found
(SAP_ERP) and then the authoring schema is set back to SAP_ERP.
1. In the Quick Launch tab page, choose Schema Mapping.
2. Choose Add.
3. Enter the authoring schema and physical schema that need to be mapped.
4. Choose OK.
SAP HANA Developer Guide
Setting Up the Analytic Model
P U B L I C
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