Technical Articles

Sanjeev Kumar

October 24, 2019 2 minute read

Part#4. Consume CDS View in an ABAP Program

This is the 4th blog post on the CDS detailed explanations after the Introduction post. Refer to the Introduction and blog post indexes here:
https://blogs.sap.com/2019/10/21/part1.-sap-cds-views-demystification/

CDS view is also called a VDM i.e. Virtual Data Model as there is no data persistence happening. All the SQL like code written in a CDS view pick the data from Base tables directly or via other CDS view at RUNTIME . The actual data still remain in the SAP Base tables and CDS views remains a virtual data model. Now in a scenario, we have created a complex CDS view which has lot of business logic implemented into it and we want to use the data coming out of this CDS view in an ABAP program, can this be possible? Yes, it is possible via new ABAP syntax. Let’s look at it.

1. We will use the Basic CDS view we created before to be consumed via ABAP program;

@AbapCatalog.sqlViewName: 'ZSQL_BASIC_VIEW'
@AbapCatalog.compiler.compareFilter: true
@AbapCatalog.preserveKey: true
@AccessControl.authorizationCheck: #NOT_REQUIRED
@EndUserText.label: 'CDS View type #BASIC'
define view ZCDS_BASIC_VIEW as select from sflight {
 //sflight 
 --key mandt, 
 key carrid, 
 seatsmax_b, 
 seatsocc_b, 
 seatsmax_f, 
 seatsocc_f
}

2. Within ABAP perspective in Eclise or HANA Studio, right click on your user under Lcal Objects within an ABAP project to create an AABAP program

Consume the CDS Basic view we created via this ABAP program. Note the new ABAP syntax used for this purpose.

*&---------------------------------------------------------------------*
*& Report zconsume_cds
*&---------------------------------------------------------------------*
*&
*&---------------------------------------------------------------------*
REPORT zconsume_cds.

Select * from ZCDS_BASIC_VIEW into table @data(lt_itab).

cl_demo_output=>display_data( lt_itab ).

2. Hit F8 or Execute the program to check the output.

In summary, there are lot of scenarios in projects where we write complex CDS views and we need to consume them into an ABAP program for different business needs. In this blog post, we looked at the new ABAP syntax to consume a CDS view.

Part# 5. CDS View Extension: Learn the concept of re-usability within CDS views.

Follow for upcoming blog posts: Sanjeev Kumar

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13 Comments

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Sebastian Dingermann

October 24, 2019 at 8:55 am

Hi Kumar,

thanks for sharing!

For just displaying the content of a CDS, you can also use Integrated Data Access (IDA).

So, there is no need for a select statement.

cl_salv_gui_table_ida=>create_for_cds_view('ZCDS_BASIC_VIEW')->fullscree( )->display( ).

Sanjeev Kumar

Blog Post Author

October 24, 2019 at 1:38 pm

Hi Sebastian,

Thanks for your input!

Regards

Sanjeev.

Jelena Perfiljeva

October 25, 2019 at 9:35 pm

FYI - better use "Reply" button when replying to someone's comment. If you do that then the other person will be notified of your reply. When we use "add comment" then only the blog author (i.e. yourself in this case) gets notified.

Vishal Agarwal

October 23, 2020 at 7:09 pm

Sir,

Very good document. Really appreciate all the effort you put. I was able to follow the whole thing. Thank you so much.

Regards,

Vishal Agrawal

Ramin Shafai

March 30, 2021 at 9:55 pm

But how do you follow the association from Abap?

Selecting from CDS view is the same as selecting from a DDIC object, nothing new here. The tricky part would be how to navigate through an association from Abap.

Pradeep Alex

February 22, 2022 at 10:42 am

Is that possible !!. to drill down from ALV reports, making use of associations.

Ramin Shafai

February 22, 2022 at 1:10 pm

I have not found a way.

And no one seems to know.

Namasivayam Naveen G

May 24, 2022 at 12:00 pm

To navigate to an association, in ABAP program/ Class where CDS view need to be consumed

In the select statement, use below syntax

For single level association,

select

\_association-field_name from CDS_VIEW_NAME

for two level association,

Select

\_association1\_association2-field_name from CDS_VIEW_NAME

Ramin Shafai

May 26, 2022 at 11:45 am

Thanks. That works!

select
  Order_Type,
  \_txt-spras as lang

  from zrsh_test_cds
  into table @data(lt_data).

The Cds view:

define view zrsh_test_cds as 

select from t003o 
    association[1..*] to t003p as _txt on _txt.auart = $projection.Order_Type
{
    auart                       as Order_Type,
    stsma                       as Order_Profile,
    _txt
}
where auart like 'LM%'

Dipak Patel

April 12, 2021 at 11:05 am

Good One Sanjeev, Thanks for the document.

Patrick Rohner

January 11, 2022 at 3:58 pm

Hi,

Is it possible to extract the data from the CDS view by adding a where clause?

Let's assume we have cds view A_COSTCENTER, but I only want to extract certain cost centers. Is that possible?

Regards,

Patrick

Ramin Shafai

February 22, 2022 at 1:15 pm

Of course, why not. It's just like any other SQL statement:

select * from A_COSTCENTER
   where cost_center = @lv_cc
   into table @data(lt_costcenters).

What I don't know is how to go down an association path. That seems not possible.

Muhammed Hassin Khan

October 11, 2022 at 1:07 pm

Hallo Kumar,

I have a problem with accumulation in CDS-Views so I posted a question.

https://answers.sap.com/questions/13733584/cds-countingsum-value-from-column.html

If i dont find a solution in CDS I would like to solve it via ABAP.

My question is, can I consume abap program in cds view?

Regards

Hassin

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Part#4. Consume CDS View in an ABAP Program

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