ABAP Select data from SAP table RLDRP into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RLDRP
*  INTO TABLE @DATA(IT_RLDRP2).
*--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_RLDRP INDEX 1 INTO DATA(WA_RLDRP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RLDRP>-TANUM = 1.
<RLDRP>-PKKEY = 1.
<RLDRP>-PKNUM = 1.
<RLDRP>-PKPOS = 1.
<RLDRP>-MATNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RLDRP-WERKS, sy-vline,
  WA_RLDRP-PRVBE, sy-vline,
  WA_RLDRP-BEHMG, sy-vline,
  WA_RLDRP-PKBHT, sy-vline,
  WA_RLDRP-PVBTX, sy-vline,
  WA_RLDRP-MAKTX, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RLDRP 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_RLDRP 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_RLDRP INTO WA_RLDRP.


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

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

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

*Conversion exit ALPHA, internal->external for field EXT_PACKV
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RLDRP-EXT_PACKV
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RLDRP-EXT_PACKV.
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_RLDRP_STR, 
TANUM TYPE STRING,
PKKEY TYPE STRING,
PKNUM TYPE STRING,
PKPOS TYPE STRING,
MATNR TYPE STRING,
WERKS TYPE STRING,
PRVBE TYPE STRING,
BEHMG TYPE STRING,
PKBHT TYPE STRING,
PVBTX TYPE STRING,
MAKTX TYPE STRING,
BEHTX TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
EXT_PACKV TYPE STRING,
ANZLT TYPE STRING,
OUTPO TYPE STRING,
JCPOS TYPE STRING,
TAPOS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RLDRP_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_RLDRP_STR-TANUM sy-vline 
WA_RLDRP_STR-PKKEY sy-vline 
WA_RLDRP_STR-PKNUM sy-vline 
WA_RLDRP_STR-PKPOS sy-vline 
WA_RLDRP_STR-MATNR sy-vline 
WA_RLDRP_STR-WERKS sy-vline 
WA_RLDRP_STR-PRVBE sy-vline 
WA_RLDRP_STR-BEHMG sy-vline 
WA_RLDRP_STR-PKBHT sy-vline 
WA_RLDRP_STR-PVBTX sy-vline 
WA_RLDRP_STR-MAKTX sy-vline 
WA_RLDRP_STR-BEHTX sy-vline 
WA_RLDRP_STR-NAME1 sy-vline 
WA_RLDRP_STR-NAME2 sy-vline 
WA_RLDRP_STR-NAME3 sy-vline 
WA_RLDRP_STR-NAME4 sy-vline 
WA_RLDRP_STR-EXT_PACKV sy-vline 
WA_RLDRP_STR-ANZLT sy-vline 
WA_RLDRP_STR-OUTPO sy-vline 
WA_RLDRP_STR-JCPOS sy-vline 
WA_RLDRP_STR-TAPOS sy-vline      INTO ld_text SEPARATED BY SPACE.

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