CD163.pdf

8/11/2019 CD163.pdf

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Chaim Bendelac – HANA ArchitectRafi Bryl – HANA Product Management

TechEd 2013, Oct-Nov-Dec 2013

CD163

SAP HANA Native Applications

River Based Development

8/11/2019 CD163.pdf


© 2013 SAP AG or an SAP affiliate company. All rights reserved.

Disclaimer

This presentation outlines our general product direction and should not be relied on

purchase decision. This presentation is not subject to your license agreement or anywith SAP. SAP has no obligation to pursue any course of business outlined in this pr

develop or release any functionality mentioned in this presentation. This presentatio

strategy and possible future developments are subject to change and may be chang

time for any reason without notice. This document is provided without a warranty of a

express or implied, including but not limited to, the implied warranties of merchantab

particular purpose, or non-infringement. SAP assumes no responsibility for errors or

document, except if such damages were caused by SAP intentionally or grossly neg

8/11/2019 CD163.pdf


Motivation

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Native HANA application development

SAP HANA: a platform for native business applications

In-memory Database

All data is represented and stored as efficient in-memory data-structures

Columnar access, Compression

Rich data types (graph, geo-space, multi-value, …)

Designed for Performance

On-chip cache efficiencies (locality)

Parallel execution – hundreds of concurrent threads, cores

Planning, predictive analytics and business libraries

Built-in Application Services (XS)

Native Application development tools

HTTP and OData service interfaces

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Creating an application

T1 T2T3

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T1 T2T3

V1

V2

cv

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T1 T2T3

V1

V2

data

model

(DB)

cv

sp

trigger

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T1 T2T3

V1

V2

data

model

(DB)

cv

sp

trigger

access control (RBAC)

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T1 T2T3

V1

V2

data

model

(DB)

cv

sp

control

trigger


business

logic (MVC)

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business

logic (MVC)


data model

T1 T2T3

V1

V2

data

model

(DB)

cv

sp

control

trigger


SQL over xDBC

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business

logic (MVC)


data model

T1 T2T3

V1

V2

data

model

(DB)

cv

sp

control

view

trigger


OData over HTTP

SQL over xDBC

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business

logic (MVC)


data model

T1 T2T3

V1

V2

data

model

(DB)

app

mob

app

cv

sp

control

view

trigger

UI


OData over HTTP

SQL over xDBC

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Creating an application, using River

T1 T2T3

V1

V2

data

model

(DB)

app

mob

app

cv

sp

control

trigger

UI


business

logic

OData over HTTP

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River vision

Simplify the experience of developing

SAP HANA Native Applications

River Language

River Programming Model

River Development Environments

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The River Language

Use River to create an integrated specification of the

data model

business logic

access control

River is familiar, declarative, object-oriented, and modular

River is cross-compiled into the most efficient HANA objects

HANA database objects (tables, roles…)

Stored procedures (SQLScript, JavaScript) OData and XS access controls

Developers focus on intent and leave optimization

and runtime configuration to the tools ("timeless software")

a

c

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HANA XS development model

1. Develop & Share

2. Activate & Test

3. Deploy

activate

Activation

DB objects

SScript

OData

Auth

XSJS

roles

River

compiler

p

studioRiver Editor

(on-premise)

browserRiver webEditor

(Cloud)

browser

Studio

Repository

.rdl

business app

developers

.rdl

workspace,

save

HANA based develop

Object management &

Delivery and patching

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The River Language(aka RDL)

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Demo scenario: "River Airlines"

River Airlines reservation system

List all flights

Book a seat

…

Implementation

Flight

flight id, from/to,

list of seatsPassenger

passenger details,

flight & seat reservation

Seat

status

City

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Entities and associations: the data model

entity Flight {

key flightId: String(8);

flightNum: String (3);

cityFrom: Association to City;

cityTo: Association to City;

depDate: LocalDate;depTime: LocalTime;

flightSeats: Association[0..*] to Seat via ba

}

entity Seat {

key flight: Association to Flight;

id: SeatNum;

isExitRow: Boolean default false;

Status: enum {free; reserved;};

}

Primitive types,

enumerations,

structured types

keys

Use "E/R modeling" to define your data model

– Enti t ies correspond to database tables – Associat ions describe relations between tables

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Views

entity Flight {


flightNum: String (3);cityFrom: Association to City;


depDate: LocalDate;

depTime: LocalTime;

flightSeats: Association[0..*] to Seat via backlink flight;

}

view TodaysFlights as

select from Flight {flightNum, cityFrom, cityTo, depTime}

where depDate = today()

order by depTime ASC;

g

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Demo: Entities

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Actions: the business logic

entity Seat {

flight: Association to Flight;

seatNum: SeatNum;


seatStatus: SeatStatus;

}entity Flight {

…


action GetEmptySeats() : Seat [] {

return select * from this.flightSeats

where Seat.seatStatus = SeatStatus.free;

}

}

this

Actions describe the application's business logic

– Local variables (scalar, streams) – Control statements (if, foreach, apply…)

– Integrated SQL queries

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Extended queries

entity Seat {

flight: Association to Flight;

seatNum: SeatNum;


seatStatus: SeatStatus;

}entity Flight {

…


action GetEmptySeats() : Seat [] {

return select * from this.flightSeats

where Seat.Status = SeatStatus.free;

}

}

– Use entity associations naturally in queries:

compare to SQL!

= __temp16 = select T1. … from Flights as T0

inner join "flights.Seat" as T1

on (T0."flightId" = "T0:flightSeats"."flight.flig

where "FlightId" = 12345;

__retval__ = select T2. … from :__temp16 as T2 wh

__FlightId St

FlightId Sea

id

Flight

temp16

Seat

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Foreach

entity market {element company: String;element sales: Int;

}

// list all companies, sorted by accumulative market share

let totalMarket = SELECT SUM (sales) FROM market;

let accumulated = 0;

foreach (c in SELECT * FROM market ORDER BY sales DESC) {

accumulated = accumulated + c.sales;

outputMarketShare(c.company, accumulated / totalMarket);

}

IBM

MS Oracle

..

Oracle

IBM

MS

..

ma

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Error handling

error InvalidPromotion {

empId : typeof Employee.id ;

current: Int;

target: Int;

}

entity Employee {

element grade: Int;

action promote(toGrade: Int) {

if (toGrade – this.grade > 3)

raise error InvalidPromotion {empId : this.id , current: this.grade, target: toGrade};

else

this.grade = toGrade;

}

onerror err: InvalidPromotion in promote(toGrade: Int) {

debug("Cannot promote from " + err.current + " to " + err.target);

return ErrorDecision.fail;

}

}

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Access Control

role Dispatcher;

entity Flight {


flightNum: String (3);cityFrom: Association to City;


depDate: LocalDate;

depTime: LocalTime;

flightSeats : Association[0..*] to Se

backlink flight;

}

action OpenNewFlight() accessible by Dispat

…

}

entity Seat {

……

action save() accessible by Flight;

…

Define ro les

CRUD and call access privileges Assign run-time users to roles

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Interoperability

entity employee {

action is_legal_SAP_email(hdr: String): Boolean as HANAJS {%

var re = /^\S+@sap.(com|corp)$/;

return re.test(v_hdr);

%}

}

entity Company as alias to sap.hana.catalog.ExtTable.T001;

view Company as SELECT FROM sap.hana.catalog.ExtTable.T001 {

BUKRS as companyCode, BUTXT as companyName

}

let StockQuotes: StockQuote[] = sap.hana.repository.XSStock.fetcher.getQuotes('http://www.nasdaq.com/quot

breakouts: inlineJavaScript or

SQLScript

alias

abstraction view

Call XS JS directly

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Customers Channel Suppliers Accounting ForeInventory Products Pricing Planning

Customer

Service

Risk Management

Team

Finance and

Operations

Account

Administration

Executive

Management

Suite on

HANA

Using HANA Live – SAP Business Suite virtual data mod

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Using HANA Live – SAP Business Suite virtual data mod

Customer

Service

Risk Management

Team

Finance and

Operations

Account

Administration

Executive

Management

Customers Channel Suppliers Accounting ForeInventory Products Pricing Planning

VDM

Suite on

HANA

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HANA Live example: ERP sales financials

ListOfCreditBlockedSalesOrders

ListOfContracts

SalesOrderItem

VBAK

VBAPVBPA

Using River:

let badOrders =

SELECT * FROM sap.hba.crm.ListofCreditBlockedSalesO

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Incremental Specification (Fragments)

namespace EPM {entity PurchaseOrder {element note;element partner;

action accept();action reject(reason: String);…

}…

}

Declaration

namespace EPM {entity PurchaseOrder {element note: LargeString;element partner: Association to

BusinessPartner;action accept() { … } action reject(reason: String) { … } …

}…

}

Definitionnamespace EPM {entity PurchaseOrder {action accept()

accessible by AuthorizedApproval;…

}role AuthorizedApproval { … }

}

Access

Controlentity EPM.PurchaseOrder {

action accept()@raises.errors: ‘InvalidModification’;

onerror e: InvalidModification inaccept() { … }

}error EPM.InvalidModification { … }

Error

Handling

namespace EPM {entity PurchaseOrder {element note: LargeStringelement partner: Associat

action accept()accessible by [email protected]: ‘Invali

onerror e: InvalidModific

action reject(reason: Str

… }role AuthorizedApproval {

error InvalidModification entity BusinessPartner {…}

}

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Other RDL features

Built-in library functions (math, string …)

Wrappers for HANA libraries (PAL, …)

Store changing instructions (save, delete)

Apply

Subtleties of assignments ("let")

Lie Cycle Management

Transaction Support

Streams!

…

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mobile

OData

Open Data Protocol: a web protocol to query and

update data over HTTP, using JSON

River Entities and Actions are immediately exposed as

OData structures upon activation

Read (with filter), write, update, delete, call …

Control via Namespaces and export keyword

See further: http://www.odata.org Entity

Data

Model

HANA

Database

OData services

browsers client

http://www.odata.org/

http://www.odata.org/

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River integration with UI app builders

web-based IDE integration with SAP UI App builders

OData consumption

OData auto-documentation / generation

Generation of HTML "CRUD" templates

%

x

River

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Demo: Actions

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River Tools

W b b d d l t C l D l

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Web-based development: Casual Developers

sign up… deploy… develop…

browser

test…

HANA

C il ti E l

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Compilation Example

application final_grade {

role admin;role student;

export @ODataentity EntA {

element name: String;element grade: Integer;action get_my_grade() : Integer accessible by student {

return grade;}

action create() accessible by admin;

}

action my_breakout(em : String) : Integer as HANAJS

{%return 1;

%}

view ViewA accessible by admin as SELECT * FROM EntA;

}

Database table…

Database view…

roles…

authorizations…

SQLScript cod

XS JS code…

OData

control

D d d E ti Pl

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namespace show.business {

entity Producer {key element name : String;element movies: Association[0..*] to Movie via backlink producer;

action createMovie(maxCost: DecimalFloat, actorsCost: Integer): Movie[0..*] {

let cheapWriter: ScriptWriter = SELECT ONE * FROM ScriptWriter ORDER BY salary DESC;let latestMovieYear = SELECT MAX(year) AS latest FROM cheapWriter.movies WHERE cost < maxCost;let cheapMoviesCount = SELECT COUNT(1) AS numOfMovies FROM cheapWriter.movies WHERE

year = latestMovieYear.latest AND cost <= maxCost;let latestMovie: Movie = Movie{};if (cheapMoviesCount.numOfMovies != 0)

latestMovie = SELECT ONE * FROM cheapWriter.movies WHEREyear = latestMovieYear.latest ORDER BY cost DESC;

else latestMovie = Movie {title: 'Scary Movie', numberInSeries: 8};

let maxIncomeAttributes = SELECT ONE genre as highIncomeGenre,

rating as highIncomeRating FROM Movie ORDER BY income DESC;let newMovie: Movie = Movie {title: latestMovie.title + ' Sequel', ... producer: this};newMovie.save();

let cheapActorsCount = SELECT COUNT(1) AS numOfActors FROM Actor WHERE totalIncome < actorsCost;if (cheapActorsCount.numOfActors >= 1) {

let cheapActor: Actor = SELECT ONE * FROM Actor WHEREtotalIncome < actorsCost ORDER BY totalIncome ASC;

let newCasting: Casting = Casting{movie: newMovie, star: cheapActor, salary: 5000};newCasting.save();return cheapWriter.movies;

} } } }

1

4

5

6

23

7

88

4

53

2

1

ScriptWriter Mov

Execution

Dependency and Execution Plan

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Demo: Integration

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In Summary

Why River?

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Why River?

Simplicity, coherence, timelessness, interoperability

– based on Entity-Relations, use a single language

for data modeling, business logic and access control

River compiler handles native code optimization

– Write/extend native applications using modular,

declarative, object-oriented design principles

UI integration

– Expose RDL entities and actions instantly via OData

Productivity, cloud

– XS integrated development experience

Integrated application server

– XS runtime environment

separate i

impleme

More About River

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More About River

River will be released in SAP HANA SPS7

To learn more, or to participate in the ongoing

beta program:

Contact one of the speakers

URL: TBD

Thank you!

Further Information

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Further Information

SAP Education and Certification Opportunities

www.sap.com/education

Watch SAP TechEd Online

www.sapteched.com/online

SAP Public Web

scn.sap.comwww.sap.com

SAP TechEd Virtual Hands-on Workshops and SAP Tech

http://www.sap.com/education

http://www.sapteched.com/online

http://scn.sap.com/welcome

http://www.sap.com/

http://www.sap.com/

http://scn.sap.com/welcome

http://www.sapteched.com/online

http://www.sap.com/education

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Access hands-on workshops post-event

Available January – March 2014

Complementary with your SAP TechEd registration

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Access replays of keynotes, Demo

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8/11/2019 CD163.pdf



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