ABAP Select data from SAP table ATP_R4D_REQUIREM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ATP_R4D_REQUIREM table and store it within an internal table, including using the newer @DATA inline declaration methods. It also shows you various ways to process this data using ABAP work area, inline declaration or field symbols including executing all the relevant CONVERSION_EXIT routines specific to ATP_R4D_REQUIREM. See here for more generic Select statement tips.

Sometimes data within SAP is stored within the database table in a different format to what it is displayed to the user. These input/output conversation FM routines are what translates the data between the two formats.

There is also a full declaration of the ATP_R4D_REQUIREM table where each field has a char/string type for you to simply copy and paste. This allows you to use processing that is only available to these field types such as the CONCATENATE statement.

DATA: IT_ATP_R4D_REQUIREM TYPE STANDARD TABLE OF ATP_R4D_REQUIREM,
      WA_ATP_R4D_REQUIREM TYPE ATP_R4D_REQUIREM,
      GD_STR TYPE STRING.

DATA: lo_typedescr type REF TO cl_abap_typedescr.
DATA: lv_fieldname type fieldname.

FIELD-SYMBOLS: <FIELD> TYPE any.
FIELD-SYMBOLS: <ATP_R4D_REQUIREM> TYPE ATP_R4D_REQUIREM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_ATP_R4D_REQUIREM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM ATP_R4D_REQUIREM
  INTO TABLE IT_ATP_R4D_REQUIREM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ATP_R4D_REQUIREM
*  INTO TABLE @DATA(IT_ATP_R4D_REQUIREM2).
*--Further methods of using ABAP code to  select data from SAP database tables

*You can also declare the header/work area using the in-line DATA declaration method
READ TABLE IT_ATP_R4D_REQUIREM INDEX 1 INTO DATA(WA_ATP_R4D_REQUIREM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_ATP_R4D_REQUIREM ASSIGNING <ATP_R4D_REQUIREM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ATP_R4D_REQUIREM>-MANDT = 1.
<ATP_R4D_REQUIREM>-RFDYREQUIREMENTUUID = 1.
<ATP_R4D_REQUIREM>-RFDYMATERIALUUID = 1.
<ATP_R4D_REQUIREM>-RFDYWORKLISTUUID = 1.
<ATP_R4D_REQUIREM>-ATPRELEVANTDOCUMENT = 1.

ENDLOOP.

LOOP AT IT_ATP_R4D_REQUIREM INTO WA_ATP_R4D_REQUIREM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ATP_R4D_REQUIREM-ATPRELEVANTDOCUMENTITEM, sy-vline,
  WA_ATP_R4D_REQUIREM-ATPRELEVANTDOCSCHEDULELINE, sy-vline,
  WA_ATP_R4D_REQUIREM-ATPRELEVANTDOCUMENTCATEGORY, sy-vline,
  WA_ATP_R4D_REQUIREM-SUPPLYINGSTORAGELOCATION, sy-vline,
  WA_ATP_R4D_REQUIREM-BATCH, sy-vline,
  WA_ATP_R4D_REQUIREM-REQUESTEDQUANTITYINBASEUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ATP_R4D_REQUIREM you want to display...

  WRITE:/ sy-uline.
* Aternatively use generic code to Write field values (and NAME) to screen report
  DO.
    ASSIGN COMPONENT sy-index OF STRUCTURE wa_ATP_R4D_REQUIREM TO <field>.
    IF sy-subrc <> 0. EXIT. ENDIF.
    WRITE:/ 'Field Value', <field>, sy-vline.
    gd_str = <field> .
    lo_typedescr ?= CL_ABAP_DATADESCR=>DESCRIBE_BY_DATA( <field> ).
    lv_fieldname = lo_typedescr->GET_RELATIVE_NAME( ).
    WRITE:/ 'Field Name', lv_fieldname.
  ENDDO.

  
*Redo loop but convert all fields from internal to out value  
LOOP AT IT_ATP_R4D_REQUIREM INTO WA_ATP_R4D_REQUIREM.


*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Convert all fields to display/output versions using conversion routines
  PERFORM convert_all_field_values CHANGING wa_EKKO.
	 
ENDLOOP.

  
*&---------------------------------------------------------------------*
*& Form convert_all_field_values
*&---------------------------------------------------------------------*
FORM convert_all_field_values CHANGING p_EKKO LIKE wa_EKKO.
DATA: ld_input(1000) TYPE c, ld_output(1000) TYPE C.

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_ATP_R4D_REQUIREM-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ATP_R4D_REQUIREM-BASEUNIT.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_ATP_R4D_REQUIREM_STR, 
MANDT TYPE STRING,
RFDYREQUIREMENTUUID TYPE STRING,
RFDYMATERIALUUID TYPE STRING,
RFDYWORKLISTUUID TYPE STRING,
ATPRELEVANTDOCUMENT TYPE STRING,
ATPRELEVANTDOCUMENTITEM TYPE STRING,
ATPRELEVANTDOCSCHEDULELINE TYPE STRING,
ATPRELEVANTDOCUMENTCATEGORY TYPE STRING,
SUPPLYINGSTORAGELOCATION TYPE STRING,
BATCH TYPE STRING,
REQUESTEDQUANTITYINBASEUNIT TYPE STRING,
ORDEREDQUANTITYINBASEUNIT TYPE STRING,
BASEUNIT TYPE STRING,
REQDPRODAVAILABILITYUTCDATETME TYPE STRING,
REQDPRODAVAILABILITYTIMEZONE TYPE STRING,
REQUESTEDLOADINGUTCDATETIME TYPE STRING,
REQUESTEDLOADINGTIMEZONE TYPE STRING,
REQUESTEDGOODSISSUEUTCDATETIME TYPE STRING,
REQUESTEDGOODSISSUETIMEZONE TYPE STRING,
REQUESTEDDELIVERYUTCDATETIME TYPE STRING,
REQUESTEDDELIVERYTIMEZONE TYPE STRING,
ISPROTECTED TYPE STRING,
ISPOSTPONED TYPE STRING,
POSTPONEMENTCATEGORY TYPE STRING,
ISPROCESSABLE TYPE STRING,
RFDYDOCUMENTSYNCSTATUS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ATP_R4D_REQUIREM_STR type T_EKKO_STR.

DATA: ld_text TYPE string.

LOOP AT IT_EKKO INTO WA_EKKO.
  MOVE-CORRESPONDING wa_EKKO TO WA_EKKO_STR.
  CONCATENATE: sy-vline
WA_ATP_R4D_REQUIREM_STR-MANDT sy-vline 
WA_ATP_R4D_REQUIREM_STR-RFDYREQUIREMENTUUID sy-vline 
WA_ATP_R4D_REQUIREM_STR-RFDYMATERIALUUID sy-vline 
WA_ATP_R4D_REQUIREM_STR-RFDYWORKLISTUUID sy-vline 
WA_ATP_R4D_REQUIREM_STR-ATPRELEVANTDOCUMENT sy-vline 
WA_ATP_R4D_REQUIREM_STR-ATPRELEVANTDOCUMENTITEM sy-vline 
WA_ATP_R4D_REQUIREM_STR-ATPRELEVANTDOCSCHEDULELINE sy-vline 
WA_ATP_R4D_REQUIREM_STR-ATPRELEVANTDOCUMENTCATEGORY sy-vline 
WA_ATP_R4D_REQUIREM_STR-SUPPLYINGSTORAGELOCATION sy-vline 
WA_ATP_R4D_REQUIREM_STR-BATCH sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDQUANTITYINBASEUNIT sy-vline 
WA_ATP_R4D_REQUIREM_STR-ORDEREDQUANTITYINBASEUNIT sy-vline 
WA_ATP_R4D_REQUIREM_STR-BASEUNIT sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQDPRODAVAILABILITYUTCDATETME sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQDPRODAVAILABILITYTIMEZONE sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDLOADINGUTCDATETIME sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDLOADINGTIMEZONE sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDGOODSISSUEUTCDATETIME sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDGOODSISSUETIMEZONE sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDDELIVERYUTCDATETIME sy-vline 
WA_ATP_R4D_REQUIREM_STR-REQUESTEDDELIVERYTIMEZONE sy-vline 
WA_ATP_R4D_REQUIREM_STR-ISPROTECTED sy-vline 
WA_ATP_R4D_REQUIREM_STR-ISPOSTPONED sy-vline 
WA_ATP_R4D_REQUIREM_STR-POSTPONEMENTCATEGORY sy-vline 
WA_ATP_R4D_REQUIREM_STR-ISPROCESSABLE sy-vline 
WA_ATP_R4D_REQUIREM_STR-RFDYDOCUMENTSYNCSTATUS sy-vline      INTO ld_text SEPARATED BY SPACE.

*Add any further fields from structure WA_EKKO_STR you want to CONCATENATE...
ENDLOOP.
ENDFORM.