SAP HANA variables and parameters



Let's see SAP HANA basic information on variables and parameters which for could be  relevant for BI designers.

In SAP HANA it is possible to define the results of a query on an information model at runtime by passing values to the model.
There are two kinds of input values which can be passed to a model: variables and parameters.
Both variables and parameters will appear as prompts for the user running the query (or will be automatically filled in by the application calling the HANA information model).

HANA variables
HANA variables are used to filter the content of an information model. They don‟t impact the execution workflow of the information model and are applied to a query to filter out some values.
Variables can be used to filter attributes.
As an example, a variable can be used to filter a result to a specific country or a specific customer.
In SQL, variables are applied in the WHERE clause of the query.

HANA parameters
Parameters are used to manipulate the execution of the information model.
Calculations performed by the model will use the parameters as input values.
Examples of parameters are currencies codes or dates when exchange rates have to be calculated.
Parameters might be compulsory for the evaluation of the information model.
In SQL, parameters values are passed via the PLACEHOLDER reserved word. 

 See also:

 SAP HANA variable creation example

Universe on SAP HANA

Comments

  1. Mattew paul July 4, 2013 at 5:43 AM

    interesting blog. It would be great if you can provide more details about it. Thanks you






    SAP HANA in London UK

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