Basic architecture of the SAP HANA engine
SAP HANA has different engines to process different views. It has the following engines:
- JOIN engine: This engine is for processing the JOINS (all type of joins)/attribute views
- OLAP engine: This engine is used to process analytical view
- CALCULATION engine: This engine is used to process complex calculation that cannot be processed by the JOIN or OLAP engine
It is the SQL optimizer, which sees the models and queries and decides which engine to call.
Any analytic view or attribute view with a calculate attribute will be processed as a calculation view. This should to be taken into consideration during modeling, because it can have a measurable impact on the performance of the data model. Different engines cooperate among themselves as well.
The following figure shows the SAP HANA engines processing different views:
Other than the preceding illustrated engines, we do have a planning engine as well in SAP HANA. The planning engine, allows financial planning...
