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5 Setting Up the Persistence Model
In SAP HANA Extended Application Services (SAP HANA XS), the persistence model defines the schema, tables,
and views that specify what data to make accessible and how. The persistence model is mapped to the
consumption model that is exposed to client applications and users, so that data can be analyzed and displayed.
SAP HANA XS enables you to create database schema, tables, views, and sequences as design-time files in the
repository. Repository files can be read by applications that you develop.
Note: All repository files including your view definition can be transported (along with tables, schema, and
sequences) to other SAP HANA systems, for example, in a delivery unit. A delivery unit is the medium SAP
HANA provides to enable you to assemble all your application-related repository artifacts together into an
archive that can be easily exported to other systems.
You can also set up data-provisioning rules and save them as design-time objects so that they can be included in
the delivery unit that you transport between systems.
As part of the process of setting up the basic persistence model for SAP HANA XS, you perform the following
tasks:
● Create a schema.
Define a design-time schema and maintain the schema definition in the repository. The transportable schema
has the file extension .hdbschema, for example, MYSCHEMA.hdbschema
● Create a table.
Define a design-time table and maintain the table definition in the repository. The transportable table has the
file extension .hdbtable, for example, MYTABLE.hdbtable
● Create a view.
Define a design-time view and maintain the view definition in the repository. The transportable view has the
file extension .hdbview, for example, MYVIEW.hdbview
● Create a sequence.
Define a design-time sequence and maintain the sequence definition in the repository. The transportable
sequence has the file extension .hdbsequence, for example, MYSEQUENCE.hdbsequence
● Import table content
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Define data-provisioning rules that enable you to import data from comma-separated values (CSV) files into
SAP HANA tables using the SAP HANA XS table-import feature. The complete configuration can be included
in a delivery unit and transported between SAP HANA systems.
Note: On activation of a repository file, the file suffix, for example, .hdbview, .hdbschema,
or .hdbtable, is used to determine which runtime plugin to call during the activation process. The plugin
reads the repository file selected for activation, for example, a table, sees the object descriptions in the
file, and creates the appropriate runtime object.
P U B L I C
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SAP HANA Developer Guide
Setting Up the Persistence Model