Single record read of a ODATA Service

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In previous SAP Netweaver Gateway tutorials part1, part2, part3 and part4 we retrieved the list of Sales Orders. In this tutorial we are going to retrieve a particular Sales Order.

We need to implement the method Get Entity (Read) of an OData service.

1. Go back to SEGW and choose the service name ZSL_EPM_DEMO.

2. Expand the service. Service Implementation → GetEntity(Read) → Right Click → Go to ABAP Workbench.

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3. Find the method SALESORDERSET_GET_ENTITY in DPC (Data Provider Class) ZCL_ZSL_EPM_DEMO_EXT and click on Redefine to redefine the method.

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4. Let’s have a look at the signature of the method.

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IT_KEY_TAB – stores the all key values and its value of the request. In our entity type the key is “SoId” .

ER_ENTITY – this is the exporting structure in which we need to pass the sales order details.

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5. Write the below code in the method SALESORDERSET_GET_ENTITY

DATA: lwa_key_tab TYPE /iwbep/s_mgw_name_value_pair,
      lv_so_id    TYPE snwd_so_id,
      lwa_snwd_so TYPE snwd_so.

* To get the Sales Order#
READ TABLE it_key_tab INTO lwa_key_tab WITH KEY name = 'SoId'.
IF sy-subrc = 0.
lv_so_id = lwa_key_tab-value.
ENDIF.

* Alpha Conversion
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_INPUT'
  EXPORTING
    input         = lv_so_id
 IMPORTING
   output        = lv_so_id.

* Get the data from the table
SELECT SINGLE * FROM snwd_so INTO CORRESPONDING FIELDS OF er_entity WHERE so_id = lv_so_id.

6. Save and activate the method and then DPC extension class.
7. Go to SAP Netweaver Gateway Client /IWFND/GW_CLIENT to test the service. Enter the service name with sales order number like below and the Execute.

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8. The result will look like below.

SAP OData READ Entity

You have successfully implemented a Single Read in SAP Netweaver Gateway OData service.

Stay tuned to us for more SAP Netweaver Gateway OData tutorials.Please feel free to comment and let us know your feedback.

Thank you.

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