ABAP Select data from SAP table V_RELMPECSC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_RELMPECSC 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_RELMPECSC. 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_RELMPECSC 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_RELMPECSC TYPE STANDARD TABLE OF V_RELMPECSC,
      WA_V_RELMPECSC TYPE V_RELMPECSC,
      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_RELMPECSC> TYPE V_RELMPECSC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_RELMPECSC
*  INTO TABLE @DATA(IT_V_RELMPECSC2).
*--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_RELMPECSC INDEX 1 INTO DATA(WA_V_RELMPECSC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_RELMPECSC>-MANDTPL = 1.
<V_RELMPECSC>-INTRENOPL = 1.
<V_RELMPECSC>-LOCHIERPL = 1.
<V_RELMPECSC>-PLSUBDIVNO = 1.
<V_RELMPECSC>-PLNO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_RELMPECSC-OBJNRPL, sy-vline,
  WA_V_RELMPECSC-MANDTPE, sy-vline,
  WA_V_RELMPECSC-INTRENOPE, sy-vline,
  WA_V_RELMPECSC-PEID, sy-vline,
  WA_V_RELMPECSC-OBJNRPE, sy-vline,
  WA_V_RELMPECSC-PETYPE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_RELMPECSC 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_RELMPECSC 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_RELMPECSC INTO WA_V_RELMPECSC.


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

*Conversion exit PLNO, internal->external for field PLNO
CALL FUNCTION 'CONVERSION_EXIT_PLNO_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPECSC-PLNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPECSC-PLNO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPECSC-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPECSC-VALIDTO.
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_RELMPECSC_STR, 
MANDTPL TYPE STRING,
INTRENOPL TYPE STRING,
LOCHIERPL TYPE STRING,
PLSUBDIVNO TYPE STRING,
PLNO TYPE STRING,
OBJNRPL TYPE STRING,
MANDTPE TYPE STRING,
INTRENOPE TYPE STRING,
PEID TYPE STRING,
OBJNRPE TYPE STRING,
PETYPE TYPE STRING,
PECSNO TYPE STRING,
MANDTOA TYPE STRING,
OBJNRSRC TYPE STRING,
OBJASSTYPE TYPE STRING,
OBJNRTRG TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_RELMPECSC_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_RELMPECSC_STR-MANDTPL sy-vline 
WA_V_RELMPECSC_STR-INTRENOPL sy-vline 
WA_V_RELMPECSC_STR-LOCHIERPL sy-vline 
WA_V_RELMPECSC_STR-PLSUBDIVNO sy-vline 
WA_V_RELMPECSC_STR-PLNO sy-vline 
WA_V_RELMPECSC_STR-OBJNRPL sy-vline 
WA_V_RELMPECSC_STR-MANDTPE sy-vline 
WA_V_RELMPECSC_STR-INTRENOPE sy-vline 
WA_V_RELMPECSC_STR-PEID sy-vline 
WA_V_RELMPECSC_STR-OBJNRPE sy-vline 
WA_V_RELMPECSC_STR-PETYPE sy-vline 
WA_V_RELMPECSC_STR-PECSNO sy-vline 
WA_V_RELMPECSC_STR-MANDTOA sy-vline 
WA_V_RELMPECSC_STR-OBJNRSRC sy-vline 
WA_V_RELMPECSC_STR-OBJASSTYPE sy-vline 
WA_V_RELMPECSC_STR-OBJNRTRG sy-vline 
WA_V_RELMPECSC_STR-VALIDFROM sy-vline 
WA_V_RELMPECSC_STR-VALIDTO sy-vline      INTO ld_text SEPARATED BY SPACE.

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