ABAP Select data from SAP table REVAR_6 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REVAR_6 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 REVAR_6. 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 REVAR_6 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_REVAR_6 TYPE STANDARD TABLE OF REVAR_6,
      WA_REVAR_6 TYPE REVAR_6,
      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: <REVAR_6> TYPE REVAR_6.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REVAR_6.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REVAR_6
  INTO TABLE IT_REVAR_6.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REVAR_6
*  INTO TABLE @DATA(IT_REVAR_62).
*--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_REVAR_6 INDEX 1 INTO DATA(WA_REVAR_62).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REVAR_6 ASSIGNING <REVAR_6>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REVAR_6>-AHELP = 1.
<REVAR_6>-VARNT = 1.
<REVAR_6>-TXV50 = 1.
<REVAR_6>-BWERT = 1.
<REVAR_6>-VBWRT = 1.

ENDLOOP.

LOOP AT IT_REVAR_6 INTO WA_REVAR_6.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REVAR_6-FDATU, sy-vline,
  WA_REVAR_6-IDATU, sy-vline,
  WA_REVAR_6-XGENEH, sy-vline,
  WA_REVAR_6-SYSTA, sy-vline,
  WA_REVAR_6-USSTA, sy-vline,
  WA_REVAR_6-IZFUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REVAR_6 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_REVAR_6 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_REVAR_6 INTO WA_REVAR_6.


*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 VARNT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_6-VARNT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_6-VARNT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BWERT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REVAR_6-BWERT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REVAR_6-BWERT.
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_REVAR_6_STR, 
AHELP TYPE STRING,
VARNT TYPE STRING,
TXV50 TYPE STRING,
BWERT TYPE STRING,
VBWRT TYPE STRING,
FDATU TYPE STRING,
IDATU TYPE STRING,
XGENEH TYPE STRING,
SYSTA TYPE STRING,
USSTA TYPE STRING,
IZFUS TYPE STRING,
AMORT TYPE STRING,
KAPWRT TYPE STRING,
KAPRAT TYPE STRING,
WIDAT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
AENAM TYPE STRING,
UPDAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REVAR_6_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_REVAR_6_STR-AHELP sy-vline 
WA_REVAR_6_STR-VARNT sy-vline 
WA_REVAR_6_STR-TXV50 sy-vline 
WA_REVAR_6_STR-BWERT sy-vline 
WA_REVAR_6_STR-VBWRT sy-vline 
WA_REVAR_6_STR-FDATU sy-vline 
WA_REVAR_6_STR-IDATU sy-vline 
WA_REVAR_6_STR-XGENEH sy-vline 
WA_REVAR_6_STR-SYSTA sy-vline 
WA_REVAR_6_STR-USSTA sy-vline 
WA_REVAR_6_STR-IZFUS sy-vline 
WA_REVAR_6_STR-AMORT sy-vline 
WA_REVAR_6_STR-KAPWRT sy-vline 
WA_REVAR_6_STR-KAPRAT sy-vline 
WA_REVAR_6_STR-WIDAT sy-vline 
WA_REVAR_6_STR-ERNAM sy-vline 
WA_REVAR_6_STR-ERDAT sy-vline 
WA_REVAR_6_STR-AENAM sy-vline 
WA_REVAR_6_STR-UPDAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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