SAP HANA Developer Guide - Get a Free Blog

For example: an address hierarchy comprised of region, country, state, and so on.
● Parent/Child Hierarchy
A parent/child hierarchy is a hierarchy in a standard view that contains a parent attribute. A parent attribute
describes a self-referencing relationship, or self-join, within the main table. Parent-child hierarchies are
constructed from a single parent attribute.
For example: a bill of materials hierarchy (parent and child) or an employee master (employee and manager)
hierarchy.
Procedure
Creating a Level Hierarchy
1. Select the Semantics node.
2. In the Hierarchies panel, choose Create option .
3. Enter a name and description for the hierarchy.
4. In the Hierarchy Type dropdown, select Level Hierarchy.
5. Select the required value in the Aggregate All Nodes.
Note: This option indicates that data is posted on aggregate nodes and should be shown in the user
interface. For example, if you have the members A with value 100, A1 with value 10, and A2 with value
20 where A1 and A2 are children of A. By default the value is set to false, and you will see a value of 30
for A.
With the value set to true, you will count the posted value 100 for A as well and see a result of 130.
If you are sure that there is no data posted on aggregate nodes you should set the option to false. The
engine will then calculate the hierarchy faster as when the option is set.
Note that this flag is only interpreted by the SAP HANA MDX engine. In the BW OLAP engine the node
values are always counted.
6. Enter a value for the default member.
7. Select the required option in the With Root Node dropdown.
Note: If a hierarchy doesn't have a root node but needs one for reporting use case, set the option to
true. This will create a root node.
8. Select the required value from the Node Style dropdown list.
128
Note: Node style determines the composition of a unique node ID. The different values for node styles
are as:
○ Level Name - the unique node ID is composed of level name and node name, for example "[Level
2].[B2]".
○ Name Only - the unique node ID is composed of level name, for example "B2".
P U B L I C
© 2012 SAP AG. All rights reserved.
SAP HANA Developer Guide
Setting Up the Analytic Model