ABAP Select data from SAP table V_RELMPED into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_RELMPED 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_RELMPED. 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_RELMPED 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_RELMPED TYPE STANDARD TABLE OF V_RELMPED,
      WA_V_RELMPED TYPE V_RELMPED,
      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_RELMPED> TYPE V_RELMPED.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_RELMPED
*  INTO TABLE @DATA(IT_V_RELMPED2).
*--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_RELMPED INDEX 1 INTO DATA(WA_V_RELMPED2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_RELMPED>-MANDTPE = 1.
<V_RELMPED>-INTRENOPE = 1.
<V_RELMPED>-PEID = 1.
<V_RELMPED>-OBJNRPE = 1.
<V_RELMPED>-PETYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_RELMPED-MANDTOA, sy-vline,
  WA_V_RELMPED-OBJNRSRC, sy-vline,
  WA_V_RELMPED-OBJASSTYPE, sy-vline,
  WA_V_RELMPED-OBJNRTRG, sy-vline,
  WA_V_RELMPED-VALIDFROM, sy-vline,
  WA_V_RELMPED-VALIDTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_RELMPED 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_RELMPED 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_RELMPED INTO WA_V_RELMPED.


*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 REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPED-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPED-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit SGENR, internal->external for field SGENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_V_RELMPED-SGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V_RELMPED-SGENR.
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_RELMPED_STR, 
MANDTPE TYPE STRING,
INTRENOPE TYPE STRING,
PEID TYPE STRING,
OBJNRPE TYPE STRING,
PETYPE TYPE STRING,
MANDTOA TYPE STRING,
OBJNRSRC TYPE STRING,
OBJASSTYPE TYPE STRING,
OBJNRTRG TYPE STRING,
VALIDFROM TYPE STRING,
VALIDTO TYPE STRING,
MANDT TYPE STRING,
INTRENO TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SMENR TYPE STRING,
OBJNR TYPE STRING,
XMETXT TYPE STRING,
SGRNR TYPE STRING,
SGENR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_RELMPED_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_RELMPED_STR-MANDTPE sy-vline 
WA_V_RELMPED_STR-INTRENOPE sy-vline 
WA_V_RELMPED_STR-PEID sy-vline 
WA_V_RELMPED_STR-OBJNRPE sy-vline 
WA_V_RELMPED_STR-PETYPE sy-vline 
WA_V_RELMPED_STR-MANDTOA sy-vline 
WA_V_RELMPED_STR-OBJNRSRC sy-vline 
WA_V_RELMPED_STR-OBJASSTYPE sy-vline 
WA_V_RELMPED_STR-OBJNRTRG sy-vline 
WA_V_RELMPED_STR-VALIDFROM sy-vline 
WA_V_RELMPED_STR-VALIDTO sy-vline 
WA_V_RELMPED_STR-MANDT sy-vline 
WA_V_RELMPED_STR-INTRENO sy-vline 
WA_V_RELMPED_STR-BUKRS sy-vline 
WA_V_RELMPED_STR-SWENR sy-vline 
WA_V_RELMPED_STR-SMENR sy-vline 
WA_V_RELMPED_STR-OBJNR sy-vline 
WA_V_RELMPED_STR-XMETXT sy-vline 
WA_V_RELMPED_STR-SGRNR sy-vline 
WA_V_RELMPED_STR-SGENR sy-vline      INTO ld_text SEPARATED BY SPACE.

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