ABAP Select data from SAP table IATPSELDREQMT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP IATPSELDREQMT 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 IATPSELDREQMT. 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 IATPSELDREQMT 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_IATPSELDREQMT TYPE STANDARD TABLE OF IATPSELDREQMT,
      WA_IATPSELDREQMT TYPE IATPSELDREQMT,
      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: <IATPSELDREQMT> TYPE IATPSELDREQMT.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IATPSELDREQMT
*  INTO TABLE @DATA(IT_IATPSELDREQMT2).
*--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_IATPSELDREQMT INDEX 1 INTO DATA(WA_IATPSELDREQMT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IATPSELDREQMT>-MANDT = 1.
<IATPSELDREQMT>-ATPREQUIREMENTUUID = 1.
<IATPSELDREQMT>-ATPCHECKUUID = 1.
<IATPSELDREQMT>-ATPCHECKVERSION = 1.
<IATPSELDREQMT>-ATPRELEVANTDOCUMENTCATEGORY = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IATPSELDREQMT-ATPRELEVANTDOCUMENT, sy-vline,
  WA_IATPSELDREQMT-ATPRELEVANTDOCUMENTITEM, sy-vline,
  WA_IATPSELDREQMT-ATPRELEVANTDOCSCHEDULELINE, sy-vline,
  WA_IATPSELDREQMT-PRODUCT, sy-vline,
  WA_IATPSELDREQMT-SUPPLYINGPLANT, sy-vline,
  WA_IATPSELDREQMT-SUPPLYINGSTORAGELOCATION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IATPSELDREQMT 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_IATPSELDREQMT 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_IATPSELDREQMT INTO WA_IATPSELDREQMT.


*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 MATN1, internal->external for field PRODUCT
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_IATPSELDREQMT-PRODUCT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IATPSELDREQMT-PRODUCT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BASEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_IATPSELDREQMT-BASEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_IATPSELDREQMT-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_IATPSELDREQMT_STR, 
MANDT TYPE STRING,
ATPREQUIREMENTUUID TYPE STRING,
ATPCHECKUUID TYPE STRING,
ATPCHECKVERSION TYPE STRING,
ATPRELEVANTDOCUMENTCATEGORY TYPE STRING,
ATPRELEVANTDOCUMENT TYPE STRING,
ATPRELEVANTDOCUMENTITEM TYPE STRING,
ATPRELEVANTDOCSCHEDULELINE TYPE STRING,
PRODUCT TYPE STRING,
SUPPLYINGPLANT TYPE STRING,
SUPPLYINGSTORAGELOCATION TYPE STRING,
BATCH TYPE STRING,
INVENTORYSPECIALSTOCKTYPE TYPE STRING,
REQUESTEDQUANTITYINBASEUNIT TYPE STRING,
BASEUNIT TYPE STRING,
BASETOCOMMONBASEQTYNUMERATOR TYPE STRING,
BASETOCOMMONBASEQTYDENOMINATOR 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,
MATCHINGABOPSEGMENTUUID TYPE STRING,
ASSGDABOPCONFIRMATIONSTRATEGY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IATPSELDREQMT_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_IATPSELDREQMT_STR-MANDT sy-vline 
WA_IATPSELDREQMT_STR-ATPREQUIREMENTUUID sy-vline 
WA_IATPSELDREQMT_STR-ATPCHECKUUID sy-vline 
WA_IATPSELDREQMT_STR-ATPCHECKVERSION sy-vline 
WA_IATPSELDREQMT_STR-ATPRELEVANTDOCUMENTCATEGORY sy-vline 
WA_IATPSELDREQMT_STR-ATPRELEVANTDOCUMENT sy-vline 
WA_IATPSELDREQMT_STR-ATPRELEVANTDOCUMENTITEM sy-vline 
WA_IATPSELDREQMT_STR-ATPRELEVANTDOCSCHEDULELINE sy-vline 
WA_IATPSELDREQMT_STR-PRODUCT sy-vline 
WA_IATPSELDREQMT_STR-SUPPLYINGPLANT sy-vline 
WA_IATPSELDREQMT_STR-SUPPLYINGSTORAGELOCATION sy-vline 
WA_IATPSELDREQMT_STR-BATCH sy-vline 
WA_IATPSELDREQMT_STR-INVENTORYSPECIALSTOCKTYPE sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDQUANTITYINBASEUNIT sy-vline 
WA_IATPSELDREQMT_STR-BASEUNIT sy-vline 
WA_IATPSELDREQMT_STR-BASETOCOMMONBASEQTYNUMERATOR sy-vline 
WA_IATPSELDREQMT_STR-BASETOCOMMONBASEQTYDENOMINATOR sy-vline 
WA_IATPSELDREQMT_STR-REQDPRODAVAILABILITYUTCDATETME sy-vline 
WA_IATPSELDREQMT_STR-REQDPRODAVAILABILITYTIMEZONE sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDLOADINGUTCDATETIME sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDLOADINGTIMEZONE sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDGOODSISSUEUTCDATETIME sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDGOODSISSUETIMEZONE sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDDELIVERYUTCDATETIME sy-vline 
WA_IATPSELDREQMT_STR-REQUESTEDDELIVERYTIMEZONE sy-vline 
WA_IATPSELDREQMT_STR-MATCHINGABOPSEGMENTUUID sy-vline 
WA_IATPSELDREQMT_STR-ASSGDABOPCONFIRMATIONSTRATEGY sy-vline      INTO ld_text SEPARATED BY SPACE.

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