Input parameter based on procedure of type Date

Use case: The user is asked to enter a date. If nothing is specified then it should be default to first day of the current month else user specified value should be used to filter the data, using Graphical calculation view.

If you are thinking to do by using Input parameter with “Derived from Procedure/Scalar function”
then you are almost there with just 2 hurdles to cross.

For this demonstration I’m using the below table structure for which the field
DOJ is of type DATE on which the input parameter will be used.

Managing cold data in SAP HANA database memory

So once you have the cold data moved away from the main memory you will notice that it is re-loaded whenever needed. But for how long will the cold data stay in memory so that the aging still makes sense? This blog explains how cold data is managed in memory and describes different strategies for keeping it all under control.

HANA database takes care of loading and unloading data to and from memory automatically with the aim to keep all relevant information in memory. In most cases only the necessary columns (i.e. columns that are actually used) are loaded into memory on the first request and kept there for later use. For example after system restart only a few columns might be initially loaded into memory and only for the hot partition as shown in the figure below.

Vora 1.2 installation Cheat sheet: Concepts, Requirements and Installation

SAP HANA Vora provides an in-memory processing engine which can scale up to thousands of nodes, both on premise and in cloud. Vora fits into the Hadoop Ecosystem and extends the Spark execution framework.

Concepts and Requirements:

Sap HANA VORA 1.2 consists of the two following main components:

• SAP HANA Vora Engine: 

SAP HANA Vora instances hold data in memory and boost the performance.

• SAP HANA Vora Spark Extension Library:
• Provides access to SAP HANA Vora through Spark.
• Makes available additional functionality, such as a hierarchy implementation.