ABAP Select data from SAP table BAPI_RM_DATGEN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM BAPI_RM_DATGEN
*  INTO TABLE @DATA(IT_BAPI_RM_DATGEN2).
*--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_BAPI_RM_DATGEN INDEX 1 INTO DATA(WA_BAPI_RM_DATGEN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<BAPI_RM_DATGEN>-PDC_NUMBER = 1.
<BAPI_RM_DATGEN>-MATERIALNR = 1.
<BAPI_RM_DATGEN>-PRODPLANT = 1.
<BAPI_RM_DATGEN>-PLANPLANT = 1.
<BAPI_RM_DATGEN>-STORAGELOC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_BAPI_RM_DATGEN-PRODVERSION, sy-vline,
  WA_BAPI_RM_DATGEN-PRODLINE, sy-vline,
  WA_BAPI_RM_DATGEN-PLANNINGID, sy-vline,
  WA_BAPI_RM_DATGEN-BATCH, sy-vline,
  WA_BAPI_RM_DATGEN-POSTDATE, sy-vline,
  WA_BAPI_RM_DATGEN-DOCDATE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_BAPI_RM_DATGEN 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_BAPI_RM_DATGEN 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_BAPI_RM_DATGEN INTO WA_BAPI_RM_DATGEN.


*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 MATN5, internal->external for field MATERIALNR
CALL FUNCTION 'CONVERSION_EXIT_MATN5_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-MATERIALNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-MATERIALNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit NUMCV, internal->external for field REVLEVEL
CALL FUNCTION 'CONVERSION_EXIT_NUMCV_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-REVLEVEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-REVLEVEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PLANORDER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-PLANORDER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-PLANORDER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNL, internal->external for field MATERIALNR_EXTERNAL
CALL FUNCTION 'CONVERSION_EXIT_MATNL_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-MATERIALNR_EXTERNAL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-MATERIALNR_EXTERNAL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATNW, internal->external for field MATERIALNR_VERSION
CALL FUNCTION 'CONVERSION_EXIT_MATNW_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-MATERIALNR_VERSION
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-MATERIALNR_VERSION.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATERIALNR_LONG
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_BAPI_RM_DATGEN-MATERIALNR_LONG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_BAPI_RM_DATGEN-MATERIALNR_LONG.
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_BAPI_RM_DATGEN_STR, 
PDC_NUMBER TYPE STRING,
MATERIALNR TYPE STRING,
PRODPLANT TYPE STRING,
PLANPLANT TYPE STRING,
STORAGELOC TYPE STRING,
PRODVERSION TYPE STRING,
PRODLINE TYPE STRING,
PLANNINGID TYPE STRING,
BATCH TYPE STRING,
POSTDATE TYPE STRING,
DOCDATE TYPE STRING,
DOCHEADERTXT TYPE STRING,
BACKFLQUANT TYPE STRING,
SCRAPQUANT TYPE STRING,
UNITOFMEASURE TYPE STRING,
UNITOFMEASURE_ISO TYPE STRING,
SCRAPREASON TYPE STRING,
REVLEVEL TYPE STRING,
PLANORDER TYPE STRING,
ORDERCOSTS TYPE STRING,
INCLCOMPSCRAP TYPE STRING,
MATERIALNR_EXTERNAL TYPE STRING,
MATERIALNR_GUID TYPE STRING,
MATERIALNR_VERSION TYPE STRING,
PERNR TYPE STRING,
GRUNR TYPE STRING,
LOART TYPE STRING,
LOGRP TYPE STRING,
LSTYP TYPE STRING,
USER1 TYPE STRING,
USER2 TYPE STRING,
MATERIALNR_LONG TYPE STRING,
WAREHOUSE_EWM TYPE STRING,
DESTINATION_STORAGE_BIN_EWM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_BAPI_RM_DATGEN_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_BAPI_RM_DATGEN_STR-PDC_NUMBER sy-vline 
WA_BAPI_RM_DATGEN_STR-MATERIALNR sy-vline 
WA_BAPI_RM_DATGEN_STR-PRODPLANT sy-vline 
WA_BAPI_RM_DATGEN_STR-PLANPLANT sy-vline 
WA_BAPI_RM_DATGEN_STR-STORAGELOC sy-vline 
WA_BAPI_RM_DATGEN_STR-PRODVERSION sy-vline 
WA_BAPI_RM_DATGEN_STR-PRODLINE sy-vline 
WA_BAPI_RM_DATGEN_STR-PLANNINGID sy-vline 
WA_BAPI_RM_DATGEN_STR-BATCH sy-vline 
WA_BAPI_RM_DATGEN_STR-POSTDATE sy-vline 
WA_BAPI_RM_DATGEN_STR-DOCDATE sy-vline 
WA_BAPI_RM_DATGEN_STR-DOCHEADERTXT sy-vline 
WA_BAPI_RM_DATGEN_STR-BACKFLQUANT sy-vline 
WA_BAPI_RM_DATGEN_STR-SCRAPQUANT sy-vline 
WA_BAPI_RM_DATGEN_STR-UNITOFMEASURE sy-vline 
WA_BAPI_RM_DATGEN_STR-UNITOFMEASURE_ISO sy-vline 
WA_BAPI_RM_DATGEN_STR-SCRAPREASON sy-vline 
WA_BAPI_RM_DATGEN_STR-REVLEVEL sy-vline 
WA_BAPI_RM_DATGEN_STR-PLANORDER sy-vline 
WA_BAPI_RM_DATGEN_STR-ORDERCOSTS sy-vline 
WA_BAPI_RM_DATGEN_STR-INCLCOMPSCRAP sy-vline 
WA_BAPI_RM_DATGEN_STR-MATERIALNR_EXTERNAL sy-vline 
WA_BAPI_RM_DATGEN_STR-MATERIALNR_GUID sy-vline 
WA_BAPI_RM_DATGEN_STR-MATERIALNR_VERSION sy-vline 
WA_BAPI_RM_DATGEN_STR-PERNR sy-vline 
WA_BAPI_RM_DATGEN_STR-GRUNR sy-vline 
WA_BAPI_RM_DATGEN_STR-LOART sy-vline 
WA_BAPI_RM_DATGEN_STR-LOGRP sy-vline 
WA_BAPI_RM_DATGEN_STR-LSTYP sy-vline 
WA_BAPI_RM_DATGEN_STR-USER1 sy-vline 
WA_BAPI_RM_DATGEN_STR-USER2 sy-vline 
WA_BAPI_RM_DATGEN_STR-MATERIALNR_LONG sy-vline 
WA_BAPI_RM_DATGEN_STR-WAREHOUSE_EWM sy-vline 
WA_BAPI_RM_DATGEN_STR-DESTINATION_STORAGE_BIN_EWM sy-vline      INTO ld_text SEPARATED BY SPACE.

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