abap code optimization for sap hanadocshare04.docshare.tips/files/31075/310753318.pdf · abap code...
TRANSCRIPT
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www.smartShiftTech.com
ABAP Code Optimization for SAP HANA
Webinar Presenter:
Albrecht Gass
Chief Architect, smartShift Technologies
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Moderator
8/13/2013 2 © 2013 smartShift Technologies. All rights reserved
Manasi Kakade
Product Marketing Manager
smartShift Technologies
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1. Introduction smartShift Technologies
2. SAP HANA Overview
3. New Performance Rules
4. Optimized ABAP Code Examples
5. Q & A
6. Further ABAP Resources
Note: You can also continue discussion via Twitter @smartShiftTech with #smartSAPHANA
Agenda
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www.smartShiftTech.com
About smartShift
Technologies 1
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About smartShift Tech
© 2013 smartShift Technologies. All rights reserved 8/13/2013 5
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Select Customers
8/13/2013 6 © 2013 smartShift Technologies. All rights reserved
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We Partner with the Best of the Breed!
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smartScale for HANA will consists of the appropriate components with newly added HANA Code Optimization Ruleset.
• smartAnalyze o SaaS Analysis
• smartUpgrade o Unicode Enablement
o Change Impact Analysis
• smartDevelop o On-going ABAP Code Remediation
© 2013 smartShift Technologies. All rights reserved
smartScale for HANA Offering
8/13/2013 8
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Presenter
8/13/2013 9 © 2013 smartShift Technologies. All rights reserved
Albrecht Gass
Chief Architect
smartShift Technologies
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www.smartShiftTech.com
SAP HANA Overview 2
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• Column and Row Store
• Dictionary based (compression)
• ACID RDBMS
• Stand-alone or SAP Business Suite/BW
• JBDC, ODBC, ADBC, MDX
• Unstructured Data Support
• Full Text Searchable
• HW Appliance or Cloud Deployment
• Advanced Calculation Engine
• Historic Data
© 2013 smartShift Technologies. All rights reserved
SAP HANA Overview
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• Unicode Only
• Integration with ‘R’
• Large Tables
• Dynamic Tables
• ABAP Code Must be Optimized
• Eclipse based IDE (ADT)
• Optimization for Star Queries
• Signification Performance Improvements
• ALV paging for large results
© 2013 smartShift Technologies. All rights reserved
SAP HANA Overview
8/13/2013 12
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• Does not impact transaction processing
• Enables “reporting without fear” by increasing reporting speeds dramatically
• Eliminates SAP as Access Loader
• Keeps processing within SAP and not Excel
• Avoid using old and/or partial data
• Convert batch processes to real-time operations
• Enable new big data processes
© 2013 smartShift Technologies. All rights reserved
HANA “Objectives”
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Attribute View
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• Can join multiple tables
• Perform simple calculations
• Only SQL Functions can be used
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© 2013 smartShift Technologies. All rights reserved
Analytical View
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• Replaces cubes in traditional BW
• Joins attribute views and fact tables
• Perform calculations and aggregations
• Only SQL Functions can be used
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© 2013 smartShift Technologies. All rights reserved
Calculated View
8/13/2013 16
• Full SQLScript
• Must define output record type
• Supports measures and hierarchies
• Callable via standard OPENSQL
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DB Procedure
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• Full SQLScript
• Can define a output record type
• Callable via CALL DATABASE PROCEDURE
• Creates table types for input and output arguments
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DB Procedure (cont.)
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Externalizing a HANA view to be used in ABAP
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• View defined in HANA
• Externalized so that it can be referenced by ABAP code
• Can be used in OpenSQL statements
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© 2013 smartShift Technologies. All rights reserved
Externalizing a view on MARA to be used by ABAP
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The view is now visible in DDIC and can be used in ABAP programming, e.g. for declarations, selections, etc.
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Performance Guidelines
and Rules 3
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• Reduce result set
• Reduce amount of data transfer
• Reduce number of DB round trips
• Index/Query optimization
• Text search for F4 help and type-ahead search
• Avoid native SQL
• Consider changes in the order in the result
• Use buffering on application server
• Existing best practices still apply
• Don’t overload HANA server
© 2013 smartShift Technologies. All rights reserved
HANA Optimization Guidelines
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• Side-car vs. Primary DB
• Instance Size
o Memory
o CPU
• Table Partitioning
• Consider Changes in Query Result Ordering
• Incompatible Native SQL Code
• Unicode Requirement
© 2013 smartShift Technologies. All rights reserved
HANA Implementation Considerations
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These patterns focus on the push-down paradigm as well as on restrictions that HANA
is imposing.
Locate joins on transactional table
Locate “SELECT … FOR ALL ENTRIES” statements
Locate SQL on SAP “index” tables (i.e. VAPMA)
Clusters of related table SQL (i.e. VBAK, VBUK, VBAP)
Custom read cluster tables
Sort of internal tables sourced from SQL
Processing of internal tables sourced from SQL
Perform unit conversion
ALV Optimization
DB Migration rules
© 2013 smartShift Technologies. All rights reserved
New HANA Performance Rules
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Optimized ABAP Code
Examples 4
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• Originally using nested SELECT FOR ALL ENTRIES
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Example 1 – Using an external view
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• Model a view based on a join of LIKP and LIPS
© 2013 smartShift Technologies. All rights reserved
Example 1 – Using an external view (2)
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• Make the new view visible to app layer: define a dictionary view
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Example 1 – Using an external view (2)
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Example 1 – Using an external view (3)
13.08.2013 29
Replacing SELECT ... FOR ALL ENTRIES:
• Required data is provides by View ZV_ERROR_DOCS, based on VBUK, VBFS,
VBSK,
• Join of ZV_ERROR_DOCS with ZV_DELIVERY_DATA,
• Integration of pre-requisite conditions, selection criteria and type
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• Original code as in example 1
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Example 2 – Pushing code to DB layer
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• Define procedure parameters
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Example 2 – Pushing code to DB layer (2)
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• Generated interface object, to be used in application logic
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Example 2 – Pushing code to DB layer (3)
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• SQL script that implements reading from relevant tables
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Example 2 – Pushing code to DB layer (4)
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• Modify code to use interface / call procedure
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Example 2 – Pushing code to DB layer (5)
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• Example 2 demonstrated a new ABAP language feature: o CALL PROCEDURE
• ABAP for HANA introduces a new usage pattern for a well known and commonly used programming feature: o ALV Grids
• True to the motto “push code down to db layer”, the new ALV grid model, also called IDA-ALV (inegrated data access list viewer), implements much of the processing in the DB layer
• Example from NW 7.4 SP0 follows. Note that SP2 adds some features not available in SP0: o Setting field header texts
o Fuzzy text search
© 2013 smartShift Technologies. All rights reserved
NetWeaver 7.4 ABAP Enhancements
8/13/2013 35
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• Internal Tables with Empty Keys
• New Internal Table Functions
• ABAP Objects (Exporting, Importing and Changing, Partially Implemented Interfaces for Testing)
• Table Expressions
• Conditional Operators
• Lossless Operator EXACT
• Conversion Operators
• Reference Operator
• Value Operator
• Constructor Operator
• Inline Declarations
• Expressions
© 2013 smartShift Technologies. All rights reserved
NetWeaver 7.4 ABAP Enhancements (cont.)
8/13/2013 36
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Use of Integrated Data Access List Grid (IDA-ALV)
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smartScale for HANA will consists of the appropriate components with newly added HANA Code Optimization Ruleset.
• smartAnalyze o SaaS Analysis
• smartUpgrade o Unicode Enablement
o Change Impact Analysis
• smartDevelop o On-going ABAP Code Remediation
© 2013 smartShift Technologies. All rights reserved
smartScale for HANA Offering
8/13/2013 38
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Q & A 5
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www.smartShiftTech.com SCN
@AlbrechtGass
Chief Architect, smartShift Technologies
Contact
8/13/2013 © 2013 smartShift Technologies. All rights reserved 40
Albrecht Gass
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Where to start?
8/13/2013 41 © 2013 smartShift Technologies. All rights reserved
Get Started with Your HANA Proof of Concept
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Further Resources 6
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High-level Info
• Main Landing Page
http://www.saphana.com/welcome
• HANA Academy (Instructional Videos)
http://www.saphana.com/community/implement/hana-
academy
• SAP HANA One Cloud
http://www.saphana.com/community/learn/cloud
• SAP HANA Marketplace
http://www.saphana.com/community/marketplace
© 2013 smartShift Technologies. All rights reserved
Online Resources
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Developer Level
• SAP community center
It is highly recommended to join SCN (SAP Community Network,
www.scn.com ) if you have not done so. Besides a dedicated HANA space
(http://scn.sap.com/community/hana-in-memory) you can also find
interesting information on related spaces (e.g. NW 7.4, mobility, cloud
computing).
• SAP HANA Developer Center
If you are a developer and you would like to get some first hands-on
experience you should check the SAP HANA Developer Center
(http://scn.sap.com/community/developer-center/hana). You will get more
information on how to sign up for a trial cloud instance and links to HANA
client and studio software for modeling
(https://hanadeveditionsapicl.hana.ondemand.com/hanadevedition). Again,
a resource highly recommended for developers. Please do check from time
to time for the latest revision (yes, it makes a difference).
• openSAP
Massive Open Online Course for HANA at https://open.sap.com/
© 2013 smartShift Technologies. All rights reserved
Online Resources
8/13/2013 44
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NW 7.4 ABAP Enhancements
• Blog Series by Host Keller
http://scn.sap.com/people/horst.keller/blog
• Netweaver Blog
http://scn.sap.com/community/netweaver/blog
• NW 7.4 Landing Page
http://scn.sap.com/docs/DOC-35002
© 2013 smartShift Technologies. All rights reserved
Online References
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• Where to get sample data?
o ERP data / SFLIGHT
Please refer to http://scn.sap.com/docs/DOC-32854 (needs SCN
account)
o Open Items Analytics
Please refer to http://scn.sap.com/docs/DOC-35518 (needs SCN
account)
o Other large data
Should you need large amounts of data to play with you can also
look at http://www.infochimps.com/datasets. They come as CSV
files which you can easily import into your HANA instance.
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