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SAP How-to Guide
Database & Technology
SAP HANA™ Appliance
How To...Consume HANA Models with Input
Parameters in BW Virtual Providers
Applicable Releases:
SAP HANA 1.0 SPS 04
SAP BW powered by HANA 7.3 SP9
Version 1.0
January 2013
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Document History
Document Version
Description
1.00
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Table of Contents
1.
Business Scenario .................................................................................................................1
2.
Background Information .......................................................................................................1
3.
Prerequisites ......................................................................................................................... 2
4.
Step-by-Step Procedure ...................................................................................................... 3
5.
4.1
Create Analytical View in SAP HANA ............................................................................. 3
4.2
Create VirtualProvider in SAP BW .................................................................................. 5
4.3
Create BEx Query based on the Virtual Provider .......................................................... 6
4.4
Verify the results .............................................................................................................. 7
4.5
Limitations ........................................................................................................................ 9
Appendix ................................................................................. Error! Bookmark not defined.
How To...Consume HANA Models with Input Parameters in BW Virtual Providers
1.
Business Scenario
In SAP BW 7.30 powered by SAP HANA, it is possible to create Virtual Providers which are based on
SAP HANA (HANA) Models.
This provides a powerful means of integrating native HANA models into the SAP BW environment;
thereby leveraging some of SAP BW’s powerful capabilities like Hierarchies, Analysis
Authorizations, centrally governed Master Data/Texts.
However, it is common practice to design HANA models to be configurable via Input Parameters
and consumption of such models in BW Virtual Providers can be tricky.
It is important here to mention the difference between Input Parameters and Variables in HANA.
Variables are used purely to restrict the data dynamically based on user input whereas input
parameters provide a means of creating models which can be configured dynamically based on
user input. Although input parameters can be employed in HANA models for a variety of use-cases,
they are most often used in formulas for calculated measures.
Hence for the purpose of illustration, this document addresses a very basic Sales Deviation
Analysis scenario where a company reports on year-on-year deviation in sales with the users having
the flexibility to dynamically choose the years being compared in the analysis.
This how-to guide describes how such a scenario can be modeled as a native HANA model with
input parameters for defining the years of comparison. The HANA model is subsequently
consumed in a BW Virtual Provider. The users report on the data based on a BEx Query built on top
of the Virtual Provider.
2.
Background Information
The procedure of creating VirtualProviders based on a HANA Models in SAP BW is described here
in detail –
http://help.sap.com/saphelp_nw73/helpdata/en/e4/e39762e1854b24a7230849c9ff589e/frame
set.htm.
The VirtualProvider in BW is an InfoProvider based on InfoObjects. The InfoObjects –
Characteristics and KeyFigures – are mapped to the corresponding Attributes and Measures of the
HANA model respectively.
However, to allow the users the option to supply values to the HANA model input parameters via a
BEx Query, there are two basic steps needed –


Map the input parameters to InfoObjects in the BW Virtual Provider. If there are no
InfoObjects existing for re-use, they may need to be created in the BW system.
In the BEx Query built on top of the VirtualProvider, create BEx Variables to allow users to
supply values to the HANA Model input parameters.
The following sections of the document describe how this can be done for the Sales Deviation
Analysis scenario in a step-by-step manner.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
3.
Prerequisites
This how-to guide is intended for readers building scenarios which combine native HANA Models
with the SAP BW environment, popularly called – HANA-BW Mixed Scenarios. Readers with prior
experience in modeling in the HANA Studio and SAP BW will benefit the most from the document.

Release Information
o
SAP BW powered by HANA
The feature described in this how-to guide is available starting from SAP BW 7.30
powered by HANA SP9 or SAP NetWeaver BW 7.31 (SAP NW BW7.0 EnhP 3)..
The feature can also be made available by applying the SAP Note 1742176.
However, the pre-requisite support package for applying the note is SP7.
This feature has to be explicitly switched-on in the SAP BW system using the
RSADMIN parameter – ‘RSDRV_HANA_INPUTPARAM_ALLOWED’ (even in
SP9). The parameter can be set by using the standard SAP report –
‘SAP_RSADMIN_MAINTAIN’. A value ’X’, against this parameter switches the
feature ON in the system.
Relevant SAP Notes

o
Also refer the SAP Notes – 1742176 and 1814038
HANA
The parameterization of HANA models with Input Parameter is available starting
from HANA 1.0 SP4
Relevant SAP Notes

January 2013
Also refer the SAP Note - 1691126
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
4.
Step-by-Step Procedure
The Year-on-Year Sales Deviation Analysis scenario is addressed by creating an Analytical View in
HANA with Input Parameters – I_CALYEAR_1 and I_CALYEAR_2 - for the two years being
compared.
The Sales Amount for each year is implemented as calculated measure which uses the value of the
corresponding Input Parameter to compute the Sales Amount. The year-on-year deviation in Sales
Amounts is calculated as the difference between the individual sales amounts of the two years.
The HANA model is consumed in a BW VirtualProvider by mapping the attributes and measures to
corresponding BW InfoObjects. Further, two new InfoObjects – ICALYR_1 and ICALYR_2 – are
created for the mapping the Input Parameters defined above.
A BEx Query is defined on the VirtualProvider with Variables on the two InfoObjects – ICALYR_1 and
I_CALYR_2 to allow users the option of choosing the years of comparison at query runtime.
4.1
Create Analytical View in HANA
...
1. Create Analytical View in HANA Studio.
Below is a screen-shot of an Analytical View in the HANA Studio. The Analytical View is based
on monthly sales data of a company. Notice that the model contains the attribute CALYEAR
and the measure SALES.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
2. To enable users to select the years at query runtime, two Input Parameters – I_CALYEAR_1
and I_CALYEAR_2 are created.
3. Two calculated measures – SALES_T1 and SALES_T2 - are created to compute the sales
amount of Year 1 and Year 2 respectively. Notice how the Input Parameters created above
are used in the formula as place-holders.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
4. Create another calculated measure – DEV_SALES (Deviation in SALES) – to compute the
deviation in the sales measures – SALES_T2 and SALES_T1
5. Activate the Analytical View.
4.2
Create VirtualProvider in SAP BW
...
1. Create a VirtualProvider in SAP BW based on the AnalyticalView created above.
2.
(Optional) Add a new dimension to the VirtualProvider – “InputParameters”.
3.
Add 2 InfoObjects – I_CALYR_1 and I_CALYR_2 to the VirtualProvider definition to allow
mapping of Input Parameters.
4. The Attributes and Measures defined in the HANA model are mapped to corresponding BW
Characteristics and Key-figures respectively. Map the two InfoObjects, I_CALYR_1 and
I_CALYR_2, to the two input parameters, I_CALYEAR_1 and I_CALYEAR_2, respectively.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
5. Activate the VirtualProvider.
4.3
Create BEx Query based on the Virtual Provider
...
1. Create a BEx Query based on the Virtual Provider defined above.
2. Create two Characteristic Value Variables, V_CALYEAR_1 and V_CALYEAR_2, based on the
two InfoObjects, I_CALYR_1 and I_CALYR2, respectively.
3. Save the Query.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
4.4
Verify the results
1. Execute the Query created above in transaction RSRT in the SAP BW system in debug mode.
2. Fill in the required values in the Variable Pop-up screen; in this case 2010 and 2011 are
entered as values.
3. Notice that the values entered for the two variables are passed as placeholders down to the
HANA model, implying that the Input Parameters are filled with the values supplied.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
4. The HANA model is executed with the input values and result is a with year-on-year deviation
in sales for the years - 2010 and 2011.
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How To...Consume HANA Models with Input Parameters in BW Virtual Providers
4.5


Limitations
Input Parameters in HANA currently support only single values. Therefore, it is only
possible to use single-value BEx Variables for passing values to the HANA model Input
Parameters. There is no built-in check for this in the BEx Query Designer. Hence, a
mismatch might result in an error at query runtime.
InfoObjects in the VirtualProvider mapped to the HANA Input Parameters should never be
allowed as drill-down characteristics. This results in an error at query runtime.
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