experience exchange cds hands on session

8/17/2019 Experience Exchange CDS Hands on Session

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Use this ti tle slide onl y wi th an im

age

CDS Extension – Hands On

By Rocky Agarwal, Sakti Mishra, Yeshwant More


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© 2015 SAP SE or an SAP affiliate company. All rights resered.

Agenda

! ntrod!ction

! Basic "eat!res

! S#$ "eat!res

! CDS %iew Extension

! Enhancement "itho#t $odification

! A#tomatic E%tension

! Ad%antage

! &i'itations

! Hands Exercises Contd((


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ntrod!ction )or *Core Data Ser%ices+

'A(A introd#ces a Paradigm Shift in Programming $odel

More )oc

S& as tDatabase

Middle Tier

HANA database

Service Layer

UI/Application Layer(→ client-side)

UI enderin!

"ST (#Data)

.


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/ools – ABA# on Ecli0se


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Basic "eat!res


6/22© 2015 SAP SE or an SAP affiliate company. All rights resered.

Create a Basic 1iew

*A+ap,atalog.s-liew(ame/ 3ASI,IE"1

define iew 3ASI,IE" as select from tc#rc 4

ey waers6

isocd6

gdat#

7



"here ,la#se

*A+ap,atalog.s-liew(ame/ 3ASI,IE"2

define iew 3ASI,IE""'E9E as select from tc#rc 4

ey waers6

isocd6

gdat#

7 where waers : EU9



2ro!0 By and Ha%ing

*A+ap,atalog.s-liew(ame/ 3ASI,IE"&

define iew 3ASI,IE"'AI(< as select from tc#rc 4

ey waers6

isocd6

gdat#

7

gro#p +y waers6 isocd6 gdat#

haing waers lie E=



3oin Conditions – Create 3oins

*A+ap,atalog.s-liew(ame/ 3ASI,IE"?

define iew 3ASI,IE"@I(

as select from tc#rc as c left o#ter Boin tc#r% as % on

c.waers : %.c#rrey 4

c.mandt as SAP,lient6

c.waers as ,#rrency6

%.c#rrdec as ,#rrencyCecimal6

c.isocd as ,#rrencyIS,ode

7



S#$ "eat!res


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CASE Ex0ressions

+Si'0le CASE4

perates lie a switch statement

Coes not allow to chec for (UDD al#eschec against (UDD always res#lts inFUnnownGH

*Searched CASE+

perates lie an if elseif con

Eal#ates a series of +oolean eret#rns the first e%pression that tr#e

Allows checs lie JIS (UDDF or


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Case State'ents


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CASE Ex0ressions

+Si'0le CASE4 *Searched CASE+

@AbapCatalog.sqlViewName: 'ZSFIN_CASE_01'define view zsfin_case_simple as select from snwd_so as so

{key so.so_id as order_id ,

case so.lifecycle_status when 'N' then 'New' when 'P' then 'In Progress' when '' then 'losed' when '!' then 'ancelled' else '"nknown' end as lifecycle_status

#

@AbapCatalog.sqlViewName: 'ZSFIN_CASE_02'define view zsfin_case_searched as select

left outer $oin snwd_so_inv_head as inv_heaon inv_head .so_guid % so.node_key{ key so.so_id as order_id , so.currency_code,

so.gross_amount, case when so.gro

when so.gross_amount ) ((( and so.gro when so.gross_amount ) *((( else '-'

end as category, case when inv_head.node_key is null then 'No

else 'In end as invoice_info

#


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Di%ision

@AbapCatalog.sqlViewName: 'ZSFIN_IV'define view /IN_+I0II1N as select from snwd_so_inv_head

{

!! "i#isio$ b% ! o$l% possible &o &loats cast2 gross_amount as abap .fltp ) / 2.0 as !! IN(E)E*+base" i#isio$:

"i#2 gross_amount, * 3 as int_4ase_division !! ECI,A-+base" i#isio$:

!! "i#isio$ si$g &$/tio$ "i#isio$ ag1 "i#isio$2 gross_amount, *, 5 3 as decimal_4

#

Di%ision

Kloating Point operandsIntegerL+ased diision

CecimalL+ased diision


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1iews with n0!t #ara'eters

1iew with in0!t 0ara'eters are not

s!00orted on all DBs... DBSYS de0endent

Syntax5

wit3 paametes 4$ame5 :

4t%pe5

Cons!'0tionCependent iews

penSMD

@AbapCatalog.sqlViewName: 'ZSFIN_6A*A,_01'define view /IN_P67689:97_(

with parameters customer_name ; abap .char ( 80as select from snwd_so as so $oin snwd_4pa as 4pa on 4pa.node_key % so{ key so.so_id as order_id ,


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1iews with n0!t #ara'eters 6Cons!'0tion7

@AbapCatalog.sqlViewName: 'ZSFIN_6A*A,_01'define view /IN_P67689:97_( with parameters customer_name ; abap .char ( 80)

as select from snwd_so as so $oin snwd_4pa as 4pa on 4pa.node_key % so. 4uyer_guid{ key so.so_id as order_id ,


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1iew Extensions


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1iew Extension

Extend existing8deli%ered CDS 1iew with5

a+le col#mn Arithmetical N ,ASE e%pressions

Diterals

Extension *techni9!e+5

Append to +ase iew

:ot allowed on 1iews5

incl#ding


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Exa'0le


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&i'itations

Dimitation of OE%tension/.I(,DUCE is not s#pported implicitly

CoesnQt s#pport pro%y redirect iews

Dimitation of e%tend iew(ot allowed on iews/

incl#ding


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CDS Hands On

DetRs Start


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/hank yo!

experience exchange cds hands on session

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