After the advancement of
SAP HANA, the innovation inside the SAP is changing quickly and there has been
a change in perspective in the way business applications are created at SAP.
The general guideline is basic: "Do as much as you can in the database to
get the best execution".
Through HANA, SAP has
delivered a high performing multi-faceted tool with rich scientific
computational abilities, in-memory equipment, upgraded pressure innovation,
geospatial capabilities, Text analytics and predictive analytics, to name a
few. With so intense a back-end, the application layer too needed to ever be
modified to completely use the enhanced capacities of HANA. CDS Views, AMDPs,
and improvements to existing Open SQL are the different accessible solution
which help in accomplishing Code Push Down – exchange the information escalated
rationale to the database bringing about better execution. AS 7.4 or above is
the required rendition of utilization layer on a HANA database for the
highlights said all through the report to work.
SAP ABAP on HANA: Introduction
ABAP (development) for
SAP HANA refers to all advancements which use the energy of SAP HANA inside
ABAP-based applications. In this unique circumstance, the SAP HANA stage is the
essential database hidden the ABAP stage. This framework deployment option is
supported with AS ABAP 7.4 onwards. The introduction of the SAP HANA stage in
the ABAP universe has gotten a move the application programming worldview.
ABAP-managed code push down
Different code pushdown
programming methods, with various levels of use of the propelled local SAP HANA
capacities, are accessible in the ABAP stage.
SAP suggests the
accompanying:
1. Enhanced Search Help
(F4 help)
2. SAP List Viewer with Integrated
Data
3. Access (ALV with IDA)
4. Open SQL
5. ABAP Core Data
Services (CDS)
6. ABAP Managed Database
Procedures (AMDP)
7. ABAP CDS table
functions
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SAP ABAP on HANA |
Introduction to CDS Views
CDS is one of the
advanced highlights presented by SAP in ABAP released 7.4 SP5. Through CDS, one
can characterize define in the ABAP repository from ABAP Development Tools
(ADT) utilizing SQL DDL syntax. With a propelled highlight set and domain
specific annotation made accessible, CDS offers a basic answer for to
acknowledge code push down from ABAP Layer.
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SAP ABAP CDS View |
Introduction to AMDP
ABAP managed database
strategy is a straightforward ABAP class technique containing
database-particular system coding. The code inside the strategy is pushed to
the database layer and executed inside the database. In this way critical
execution changes of information concentrated procedures can be accomplished by
code push-down from the application server to the database server. This
diminishes the quantity of information exchanges and the measure of exchanged
information between the two servers.
CDS Views in detail
To completely use the
high performing abilities of SAP HANA for application advancement, SAP has
introduced a new mechanism to carry out data modelling known as core data
services(CDS). With CDS, data models are characterized from the application
server yet are executed on the database bringing about an ideal code push down.
CDS additionally offers abilities past the conventional information displaying
devices, including support for conceptual modeling and relationship
definitions, built-in functions, and extensions. Initially, CDS was accessible
just in the plan time and runtime condition of SAP HANA.
What is CDS?
CDS is a SAP system for
characterizing semantically rich rich models, called CDS views. It is
characterized utilizing SQL-based information definition language (DDL) which
depends on standard SQL with advanced features like associations &
annotations. CDS goes past the traditional querying abilities by accomplishing
complex computations and manipulation easily.
CDS views are very like
the ABAP abap repository views characterized utilizing ABAP layer. Be that as
it may, CDS enables characterizing fundamental perspectives to accomplish
analytics and aggregation and later extend them to make considerably more
perplexing artifacts making it more plausible with the complex business
condition. While making a CDS view from ABAP layer, a comparing DB view is made
in HANA with the name gave in the CDS editorial editor. This DB view can be gotten
to simply like some other data show in HANA database. Additionally, CDS offers
consolidating result set of at least two inquiries into a solitary outcome set
utilizing UNION operator, capacity to switch on programmed customer dealing
with utilizing the comment @ClientDependent: true. Additionally, it empowers
taking care of buffering of CDS elements easily.
Advantages of CDS Views:
1. Reusability of
database artifacts.
2. Huge Feature Set –
Example: Associations.
3. Domain Specific
Consumption of Data models – Example: Annotations.
4. Customer taking care
of can be accomplished in CDS.
Limitations of CDS Views:
1. Just 1 result set can
be come back from a CDS View.
2. Just 1 independent
process can be completed at 1 time.
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