ABAP Select data from SAP table J_3RMLISTMAT into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP J_3RMLISTMAT 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 J_3RMLISTMAT. 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 J_3RMLISTMAT 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_J_3RMLISTMAT TYPE STANDARD TABLE OF J_3RMLISTMAT,
      WA_J_3RMLISTMAT TYPE J_3RMLISTMAT,
      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: <J_3RMLISTMAT> TYPE J_3RMLISTMAT.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_J_3RMLISTMAT.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM J_3RMLISTMAT
  INTO TABLE IT_J_3RMLISTMAT.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM J_3RMLISTMAT
*  INTO TABLE @DATA(IT_J_3RMLISTMAT2).
*--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_J_3RMLISTMAT INDEX 1 INTO DATA(WA_J_3RMLISTMAT2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_J_3RMLISTMAT ASSIGNING <J_3RMLISTMAT>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<J_3RMLISTMAT>-XMATNR = 1.
<J_3RMLISTMAT>-BWTAR = 1.
<J_3RMLISTMAT>-WERK = 1.
<J_3RMLISTMAT>-LGORT = 1.
<J_3RMLISTMAT>-CHARG = 1.

ENDLOOP.

LOOP AT IT_J_3RMLISTMAT INTO WA_J_3RMLISTMAT.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_J_3RMLISTMAT-SOBKZ, sy-vline,
  WA_J_3RMLISTMAT-LINKK, sy-vline,
  WA_J_3RMLISTMAT-MAKTX, sy-vline,
  WA_J_3RMLISTMAT-BEGPRICE1, sy-vline,
  WA_J_3RMLISTMAT-WAERS, sy-vline,
  WA_J_3RMLISTMAT-YMEINS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_J_3RMLISTMAT 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_J_3RMLISTMAT 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_J_3RMLISTMAT INTO WA_J_3RMLISTMAT.


*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 XMATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_J_3RMLISTMAT-XMATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RMLISTMAT-XMATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field YMEINS
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_J_3RMLISTMAT-YMEINS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RMLISTMAT-YMEINS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field XSAKNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_J_3RMLISTMAT-XSAKNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_J_3RMLISTMAT-XSAKNR.
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_J_3RMLISTMAT_STR, 
XMATNR TYPE STRING,
BWTAR TYPE STRING,
WERK TYPE STRING,
LGORT TYPE STRING,
CHARG TYPE STRING,
SOBKZ TYPE STRING,
LINKK TYPE STRING,
MAKTX TYPE STRING,
BEGPRICE1 TYPE STRING,
WAERS TYPE STRING,
YMEINS TYPE STRING,
BEGREMN TYPE STRING,
ENDREMN TYPE STRING,
BEGSUM TYPE STRING,
ENDSUM TYPE STRING,
BKLAS TYPE STRING,
XSAKNR TYPE STRING,
EKGRP TYPE STRING,
MTART TYPE STRING,
MATKL TYPE STRING,
YBUKRS TYPE STRING,
BISMT TYPE STRING,
DELTLBKUMD TYPE STRING,
DELTLBKUMK TYPE STRING,
DELTSALKD TYPE STRING,
DELTSALKK TYPE STRING,
YCHANGPRICE TYPE STRING,
BANNER_DOC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_J_3RMLISTMAT_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_J_3RMLISTMAT_STR-XMATNR sy-vline 
WA_J_3RMLISTMAT_STR-BWTAR sy-vline 
WA_J_3RMLISTMAT_STR-WERK sy-vline 
WA_J_3RMLISTMAT_STR-LGORT sy-vline 
WA_J_3RMLISTMAT_STR-CHARG sy-vline 
WA_J_3RMLISTMAT_STR-SOBKZ sy-vline 
WA_J_3RMLISTMAT_STR-LINKK sy-vline 
WA_J_3RMLISTMAT_STR-MAKTX sy-vline 
WA_J_3RMLISTMAT_STR-BEGPRICE1 sy-vline 
WA_J_3RMLISTMAT_STR-WAERS sy-vline 
WA_J_3RMLISTMAT_STR-YMEINS sy-vline 
WA_J_3RMLISTMAT_STR-BEGREMN sy-vline 
WA_J_3RMLISTMAT_STR-ENDREMN sy-vline 
WA_J_3RMLISTMAT_STR-BEGSUM sy-vline 
WA_J_3RMLISTMAT_STR-ENDSUM sy-vline 
WA_J_3RMLISTMAT_STR-BKLAS sy-vline 
WA_J_3RMLISTMAT_STR-XSAKNR sy-vline 
WA_J_3RMLISTMAT_STR-EKGRP sy-vline 
WA_J_3RMLISTMAT_STR-MTART sy-vline 
WA_J_3RMLISTMAT_STR-MATKL sy-vline 
WA_J_3RMLISTMAT_STR-YBUKRS sy-vline 
WA_J_3RMLISTMAT_STR-BISMT sy-vline 
WA_J_3RMLISTMAT_STR-DELTLBKUMD sy-vline 
WA_J_3RMLISTMAT_STR-DELTLBKUMK sy-vline 
WA_J_3RMLISTMAT_STR-DELTSALKD sy-vline 
WA_J_3RMLISTMAT_STR-DELTSALKK sy-vline 
WA_J_3RMLISTMAT_STR-YCHANGPRICE sy-vline 
WA_J_3RMLISTMAT_STR-BANNER_DOC sy-vline      INTO ld_text SEPARATED BY SPACE.

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