ABAP Select data from SAP table RLIST into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLIST
*  INTO TABLE @DATA(IT_RLIST2).
*--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_RLIST INDEX 1 INTO DATA(WA_RLIST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLIST>-MIBOK = 1.
<RLIST>-INVZR = 1.
<RLIST>-KOLIS = 1.
<RLIST>-NORMA = 1.
<RLIST>-ZWEIZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLIST-BREIT, sy-vline,
  WA_RLIST-NIGEZ, sy-vline,
  WA_RLIST-MISCH, sy-vline,
  WA_RLIST-LZUOR, sy-vline,
  WA_RLIST-LRMAT, sy-vline,
  WA_RLIST-LFMAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLIST 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_RLIST 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_RLIST INTO WA_RLIST.


*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.
ENDFORM. 

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

TYPES: BEGIN OF T_RLIST_STR, 
MIBOK TYPE STRING,
INVZR TYPE STRING,
KOLIS TYPE STRING,
NORMA TYPE STRING,
ZWEIZ TYPE STRING,
BREIT TYPE STRING,
NIGEZ TYPE STRING,
MISCH TYPE STRING,
LZUOR TYPE STRING,
LRMAT TYPE STRING,
LFMAT TYPE STRING,
LKZUO TYPE STRING,
LFREI TYPE STRING,
SORKZ TYPE STRING,
NGESP TYPE STRING,
SORK2 TYPE STRING,
DAUVO TYPE STRING,
DAUBI TYPE STRING,
MITPL TYPE STRING,
PMITB TYPE STRING,
POHNI TYPE STRING,
TBGTA TYPE STRING,
OFFTA TYPE STRING,
OFFTP TYPE STRING,
MILIL TYPE STRING,
QUITA TYPE STRING,
SEVON TYPE STRING,
SENAC TYPE STRING,
SERUE TYPE STRING,
MIKOM TYPE STRING,
FAGEL TYPE STRING,
AUSGD TYPE STRING,
AUSGK TYPE STRING,
AUSGM TYPE STRING,
UEBER TYPE STRING,
ALLTA TYPE STRING,
SUBST TYPE STRING,
ZUSAT TYPE STRING,
TEILB TYPE STRING,
SELET TYPE STRING,
ENTNA TYPE STRING,
AUFTE TYPE STRING,
DIREK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLIST_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_RLIST_STR-MIBOK sy-vline 
WA_RLIST_STR-INVZR sy-vline 
WA_RLIST_STR-KOLIS sy-vline 
WA_RLIST_STR-NORMA sy-vline 
WA_RLIST_STR-ZWEIZ sy-vline 
WA_RLIST_STR-BREIT sy-vline 
WA_RLIST_STR-NIGEZ sy-vline 
WA_RLIST_STR-MISCH sy-vline 
WA_RLIST_STR-LZUOR sy-vline 
WA_RLIST_STR-LRMAT sy-vline 
WA_RLIST_STR-LFMAT sy-vline 
WA_RLIST_STR-LKZUO sy-vline 
WA_RLIST_STR-LFREI sy-vline 
WA_RLIST_STR-SORKZ sy-vline 
WA_RLIST_STR-NGESP sy-vline 
WA_RLIST_STR-SORK2 sy-vline 
WA_RLIST_STR-DAUVO sy-vline 
WA_RLIST_STR-DAUBI sy-vline 
WA_RLIST_STR-MITPL sy-vline 
WA_RLIST_STR-PMITB sy-vline 
WA_RLIST_STR-POHNI sy-vline 
WA_RLIST_STR-TBGTA sy-vline 
WA_RLIST_STR-OFFTA sy-vline 
WA_RLIST_STR-OFFTP sy-vline 
WA_RLIST_STR-MILIL sy-vline 
WA_RLIST_STR-QUITA sy-vline 
WA_RLIST_STR-SEVON sy-vline 
WA_RLIST_STR-SENAC sy-vline 
WA_RLIST_STR-SERUE sy-vline 
WA_RLIST_STR-MIKOM sy-vline 
WA_RLIST_STR-FAGEL sy-vline 
WA_RLIST_STR-AUSGD sy-vline 
WA_RLIST_STR-AUSGK sy-vline 
WA_RLIST_STR-AUSGM sy-vline 
WA_RLIST_STR-UEBER sy-vline 
WA_RLIST_STR-ALLTA sy-vline 
WA_RLIST_STR-SUBST sy-vline 
WA_RLIST_STR-ZUSAT sy-vline 
WA_RLIST_STR-TEILB sy-vline 
WA_RLIST_STR-SELET sy-vline 
WA_RLIST_STR-ENTNA sy-vline 
WA_RLIST_STR-AUFTE sy-vline 
WA_RLIST_STR-DIREK sy-vline      INTO ld_text SEPARATED BY SPACE.

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