SAP ABAP Hana Consultant Interview Questions and Answers

Key considerations for migrating from ECC to HANA

• Understand the current landscape and customizations in ECC system

• Evaluate the data volume and performance requirements for HANA

• Review and optimize existing ABAP code for HANA compatibility

• Plan for data migration and transformation processes

• Consider the impact on existing interfaces and reports

• Train the team on HANA-specific development and administration tasks

Tips for optimizing CDS performance

• Avoid using SELECT * in CDS views

• Use associations instead of joins

• Use aggregate functions instead of GROUP BY

• Use filters to reduce the amount of data retrieved

• Avoid using nested views

• Use secondary indexes for frequently accessed fields

• Avoid using complex expressions in WHERE clause

• Use @Analytics.queryTimeout to limit query execution time

Parallel processing in HANA is tackled using parallelization techniques and optimizing queries.

• Use parallelization techniques like partitioning, distribution, and parallel join

• Optimize queries by reducing data transfer and minimizing data movement

• Leverage HANA's in-memory computing capabilities for faster processing

• Use parallel processing frameworks like Apache Spark for distributed processing

• Ensure proper resource allocation and monitoring for efficient parallel processing