ABAP Select data from SAP table RELA_VERTRAEGE_GR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RELA_VERTRAEGE_GR
*  INTO TABLE @DATA(IT_RELA_VERTRAEGE_GR2).
*--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_RELA_VERTRAEGE_GR INDEX 1 INTO DATA(WA_RELA_VERTRAEGE_GR2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RELA_VERTRAEGE_GR>-BUKRS = 1.
<RELA_VERTRAEGE_GR>-RECNTYPE = 1.
<RELA_VERTRAEGE_GR>-XKBEZ = 1.
<RELA_VERTRAEGE_GR>-RELSSUBTYPE = 1.
<RELA_VERTRAEGE_GR>-XRELSSUBTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RELA_VERTRAEGE_GR-RECNBEG, sy-vline,
  WA_RELA_VERTRAEGE_GR-RECNTXT, sy-vline,
  WA_RELA_VERTRAEGE_GR-AREA, sy-vline,
  WA_RELA_VERTRAEGE_GR-UNIT, sy-vline,
  WA_RELA_VERTRAEGE_GR-RELSAKTZ, sy-vline,
  WA_RELA_VERTRAEGE_GR-RELSWIRTUEBG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RELA_VERTRAEGE_GR 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_RELA_VERTRAEGE_GR 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_RELA_VERTRAEGE_GR INTO WA_RELA_VERTRAEGE_GR.


*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 CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RELA_VERTRAEGE_GR-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELA_VERTRAEGE_GR-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RECNNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_RELA_VERTRAEGE_GR-RECNNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RELA_VERTRAEGE_GR-RECNNR.
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_RELA_VERTRAEGE_GR_STR, 
BUKRS TYPE STRING,
RECNTYPE TYPE STRING,
XKBEZ TYPE STRING,
RELSSUBTYPE TYPE STRING,
XRELSSUBTYPE TYPE STRING,
RECNBEG TYPE STRING,
RECNTXT TYPE STRING,
AREA TYPE STRING,
UNIT TYPE STRING,
RELSAKTZ TYPE STRING,
RELSWIRTUEBG TYPE STRING,
RECNEND TYPE STRING,
RECNNR TYPE STRING,
INTRENO TYPE STRING,
DGULTAB TYPE STRING,
DGULTBIS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RELA_VERTRAEGE_GR_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_RELA_VERTRAEGE_GR_STR-BUKRS sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RECNTYPE sy-vline 
WA_RELA_VERTRAEGE_GR_STR-XKBEZ sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RELSSUBTYPE sy-vline 
WA_RELA_VERTRAEGE_GR_STR-XRELSSUBTYPE sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RECNBEG sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RECNTXT sy-vline 
WA_RELA_VERTRAEGE_GR_STR-AREA sy-vline 
WA_RELA_VERTRAEGE_GR_STR-UNIT sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RELSAKTZ sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RELSWIRTUEBG sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RECNEND sy-vline 
WA_RELA_VERTRAEGE_GR_STR-RECNNR sy-vline 
WA_RELA_VERTRAEGE_GR_STR-INTRENO sy-vline 
WA_RELA_VERTRAEGE_GR_STR-DGULTAB sy-vline 
WA_RELA_VERTRAEGE_GR_STR-DGULTBIS sy-vline      INTO ld_text SEPARATED BY SPACE.

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