ABAP Select data from SAP table V_RELMPEDPF into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_RELMPEDPF
*  INTO TABLE @DATA(IT_V_RELMPEDPF2).
*--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_V_RELMPEDPF INDEX 1 INTO DATA(WA_V_RELMPEDPF2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_RELMPEDPF>-CLIENT = 1.
<V_RELMPEDPF>-ADDRNUMBER = 1.
<V_RELMPEDPF>-DATE_FROM = 1.
<V_RELMPEDPF>-NATION = 1.
<V_RELMPEDPF>-PARTNER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_RELMPEDPF-ROLE, sy-vline,
  WA_V_RELMPEDPF-NAME_LAST, sy-vline,
  WA_V_RELMPEDPF-NAME_FIRST, sy-vline,
  WA_V_RELMPEDPF-MC_NAME1, sy-vline,
  WA_V_RELMPEDPF-MC_NAME2, sy-vline,
  WA_V_RELMPEDPF-NAME_ORG1, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_RELMPEDPF 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_V_RELMPEDPF 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_V_RELMPEDPF INTO WA_V_RELMPEDPF.


*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 ADDRNUMBER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPEDPF-ADDRNUMBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPEDPF-ADDRNUMBER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPEDPF-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPEDPF-PARTNER.
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_V_RELMPEDPF_STR, 
CLIENT TYPE STRING,
ADDRNUMBER TYPE STRING,
DATE_FROM TYPE STRING,
NATION TYPE STRING,
PARTNER TYPE STRING,
ROLE TYPE STRING,
NAME_LAST TYPE STRING,
NAME_FIRST TYPE STRING,
MC_NAME1 TYPE STRING,
MC_NAME2 TYPE STRING,
NAME_ORG1 TYPE STRING,
NAME_GRP1 TYPE STRING,
MC_CITY1 TYPE STRING,
POST_CODE1 TYPE STRING,
MC_STREET TYPE STRING,
COUNTRY TYPE STRING,
MANDT TYPE STRING,
INTRENO TYPE STRING,
PEID TYPE STRING,
OBJNR TYPE STRING,
PETYPE TYPE STRING,
LOCHIER TYPE STRING,
PEDPNO TYPE STRING,
PEPREDPNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_RELMPEDPF_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_V_RELMPEDPF_STR-CLIENT sy-vline 
WA_V_RELMPEDPF_STR-ADDRNUMBER sy-vline 
WA_V_RELMPEDPF_STR-DATE_FROM sy-vline 
WA_V_RELMPEDPF_STR-NATION sy-vline 
WA_V_RELMPEDPF_STR-PARTNER sy-vline 
WA_V_RELMPEDPF_STR-ROLE sy-vline 
WA_V_RELMPEDPF_STR-NAME_LAST sy-vline 
WA_V_RELMPEDPF_STR-NAME_FIRST sy-vline 
WA_V_RELMPEDPF_STR-MC_NAME1 sy-vline 
WA_V_RELMPEDPF_STR-MC_NAME2 sy-vline 
WA_V_RELMPEDPF_STR-NAME_ORG1 sy-vline 
WA_V_RELMPEDPF_STR-NAME_GRP1 sy-vline 
WA_V_RELMPEDPF_STR-MC_CITY1 sy-vline 
WA_V_RELMPEDPF_STR-POST_CODE1 sy-vline 
WA_V_RELMPEDPF_STR-MC_STREET sy-vline 
WA_V_RELMPEDPF_STR-COUNTRY sy-vline 
WA_V_RELMPEDPF_STR-MANDT sy-vline 
WA_V_RELMPEDPF_STR-INTRENO sy-vline 
WA_V_RELMPEDPF_STR-PEID sy-vline 
WA_V_RELMPEDPF_STR-OBJNR sy-vline 
WA_V_RELMPEDPF_STR-PETYPE sy-vline 
WA_V_RELMPEDPF_STR-LOCHIER sy-vline 
WA_V_RELMPEDPF_STR-PEDPNO sy-vline 
WA_V_RELMPEDPF_STR-PEPREDPNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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