ABAP Select data from SAP table DIWPS_REV_SEL into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DIWPS_REV_SEL
*  INTO TABLE @DATA(IT_DIWPS_REV_SEL2).
*--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_DIWPS_REV_SEL INDEX 1 INTO DATA(WA_DIWPS_REV_SEL2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DIWPS_REV_SEL>-MANDT = 1.
<DIWPS_REV_SEL>-IWERK = 1.
<DIWPS_REV_SEL>-REVNR = 1.
<DIWPS_REV_SEL>-REVBD = 1.
<DIWPS_REV_SEL>-REVBZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DIWPS_REV_SEL-REVED, sy-vline,
  WA_DIWPS_REV_SEL-REVEZ, sy-vline,
  WA_DIWPS_REV_SEL-REVTX, sy-vline,
  WA_DIWPS_REV_SEL-REVAB, sy-vline,
  WA_DIWPS_REV_SEL-VAPLZ, sy-vline,
  WA_DIWPS_REV_SEL-VAWRK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DIWPS_REV_SEL 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_DIWPS_REV_SEL 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_DIWPS_REV_SEL INTO WA_DIWPS_REV_SEL.


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

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

*Conversion exit ABPSN, internal->external for field PSPEL
CALL FUNCTION 'CONVERSION_EXIT_ABPSN_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_REV_SEL-PSPEL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_REV_SEL-PSPEL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field AUFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_DIWPS_REV_SEL-AUFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DIWPS_REV_SEL-AUFNR.
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_DIWPS_REV_SEL_STR, 
MANDT TYPE STRING,
IWERK TYPE STRING,
REVNR TYPE STRING,
REVBD TYPE STRING,
REVBZ TYPE STRING,
REVED TYPE STRING,
REVEZ TYPE STRING,
REVTX TYPE STRING,
REVAB TYPE STRING,
VAPLZ TYPE STRING,
VAWRK TYPE STRING,
EQUNR TYPE STRING,
TPLNR TYPE STRING,
PSPEL TYPE STRING,
AUFNR TYPE STRING,
AENAM TYPE STRING,
AEDAT TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
REVTY TYPE STRING,
EXTREF TYPE STRING,
EXTAPPL TYPE STRING,
SELID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DIWPS_REV_SEL_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_DIWPS_REV_SEL_STR-MANDT sy-vline 
WA_DIWPS_REV_SEL_STR-IWERK sy-vline 
WA_DIWPS_REV_SEL_STR-REVNR sy-vline 
WA_DIWPS_REV_SEL_STR-REVBD sy-vline 
WA_DIWPS_REV_SEL_STR-REVBZ sy-vline 
WA_DIWPS_REV_SEL_STR-REVED sy-vline 
WA_DIWPS_REV_SEL_STR-REVEZ sy-vline 
WA_DIWPS_REV_SEL_STR-REVTX sy-vline 
WA_DIWPS_REV_SEL_STR-REVAB sy-vline 
WA_DIWPS_REV_SEL_STR-VAPLZ sy-vline 
WA_DIWPS_REV_SEL_STR-VAWRK sy-vline 
WA_DIWPS_REV_SEL_STR-EQUNR sy-vline 
WA_DIWPS_REV_SEL_STR-TPLNR sy-vline 
WA_DIWPS_REV_SEL_STR-PSPEL sy-vline 
WA_DIWPS_REV_SEL_STR-AUFNR sy-vline 
WA_DIWPS_REV_SEL_STR-AENAM sy-vline 
WA_DIWPS_REV_SEL_STR-AEDAT sy-vline 
WA_DIWPS_REV_SEL_STR-ERNAM sy-vline 
WA_DIWPS_REV_SEL_STR-ERDAT sy-vline 
WA_DIWPS_REV_SEL_STR-REVTY sy-vline 
WA_DIWPS_REV_SEL_STR-EXTREF sy-vline 
WA_DIWPS_REV_SEL_STR-EXTAPPL sy-vline 
WA_DIWPS_REV_SEL_STR-SELID sy-vline      INTO ld_text SEPARATED BY SPACE.

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