This page provides some information to the OLAP engine and some other related topics like F4 help and the interface to the data base (also called DataManager). It should help to get a better understanding of the basic concepts and give you a guideline how to analyze problems in these areas.
OLAP Layer
OLAP Core / Calculation of Formulas, Exception Aggregation, Constant Selection, Virtual Key Figures, Formula Variables ...
Query Performance and Memory Consumption / Query Performance and Memory Consumption
Support Tools / RSRT, RSTT, RSECADMIN, ..
BW OLAP Services
F4 Help / F4 Modes, Special Characteristics, MasterData read services
Report to Report Interface / Report to Report Interface
Variable Processing / Customer Exit Variables, Refresh Variables, ...
Hierarchy Handling / Presentation Hierarchies
Currency Translation / Currency Translation
Unit Conversion / Unit Conversion
OLAP Authorizations / OLAP Authorization
InfoProvider Layer
Database Interface / Star Schema, LISTCUBE, RSDRI_INFOPROV_READ, Compression
Multiprovider / Multiprovider, SPO, Pruning
InfoSets / InfoSets
HANA Provider / Composite Provider, advanced DSO, Open ODS view, ...
Virtual Providers / Based on Function Modules, Based on DTP for Direct Access
Transient Objects / Transient Providers and Queries, Transient Objects based on CDS Views
Inventory Cubes / Cubes with non-cumulative Key Figures
Query as InfoProvider / Query as InfoProvider
BW running on HANA Database and SAP BW/4HANA
Data Modeling / Hana Optimized Cube, CompositeProvider, Datastore Object (Advanced), Open ODS View
OLAP Analytical Engine / Hana Pushdown of features like Exception Aggregation
Operation and Administration of HANA DB / Operation and Administration of HANA DB
BW APIs to OLAP
MDX / MDX interface / MDX processor
Easy Query / Easy Query
OData / BW OData Queries
Other OT Topics
OLAP Cache / OLAP Cache
BWA - Business Warehouse Accelerator (BW-BEX-OT-BIA) / Business Warehouse Accelerator
BW Aggregates / OLAP Aggragates