ABAP Select data from SAP table REG97 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REG97 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 REG97. 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 REG97 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_REG97 TYPE STANDARD TABLE OF REG97,
      WA_REG97 TYPE REG97,
      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: <REG97> TYPE REG97.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REG97.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REG97
  INTO TABLE IT_REG97.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REG97
*  INTO TABLE @DATA(IT_REG972).
*--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_REG97 INDEX 1 INTO DATA(WA_REG972).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REG97 ASSIGNING <REG97>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REG97>-BGLJAHR = 1.
<REG97>-GERAET = 1.
<REG97>-BGLNUM = 1.
<REG97>-BGLART = 1.
<REG97>-PR = 1.

ENDLOOP.

LOOP AT IT_REG97 INTO WA_REG97.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REG97-ZW, sy-vline,
  WA_REG97-NETZGER, sy-vline,
  WA_REG97-SPARTYP, sy-vline,
  WA_REG97-WARTDAT, sy-vline,
  WA_REG97-PLOMBE, sy-vline,
  WA_REG97-PLOMBDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REG97 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_REG97 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_REG97 INTO WA_REG97.


*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 GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG97-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG97-GERAET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG97-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG97-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DEVGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG97-DEVGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG97-DEVGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG97-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG97-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG97-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG97-MATNR.
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_REG97_STR, 
BGLJAHR TYPE STRING,
GERAET TYPE STRING,
BGLNUM TYPE STRING,
BGLART TYPE STRING,
PR TYPE STRING,
ZW TYPE STRING,
NETZGER TYPE STRING,
SPARTYP TYPE STRING,
WARTDAT TYPE STRING,
PLOMBE TYPE STRING,
PLOMBDAT TYPE STRING,
NUMMER TYPE STRING,
EQUNR TYPE STRING,
DEVGRP TYPE STRING,
BWART TYPE STRING,
LGORT TYPE STRING,
WERKS TYPE STRING,
KOSTL TYPE STRING,
WEMPF TYPE STRING,
BKTXT TYPE STRING,
SOBKZ TYPE STRING,
BUDAT TYPE STRING,
SPARTYPTXT TYPE STRING,
MATNR TYPE STRING,
GRUND TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REG97_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_REG97_STR-BGLJAHR sy-vline 
WA_REG97_STR-GERAET sy-vline 
WA_REG97_STR-BGLNUM sy-vline 
WA_REG97_STR-BGLART sy-vline 
WA_REG97_STR-PR sy-vline 
WA_REG97_STR-ZW sy-vline 
WA_REG97_STR-NETZGER sy-vline 
WA_REG97_STR-SPARTYP sy-vline 
WA_REG97_STR-WARTDAT sy-vline 
WA_REG97_STR-PLOMBE sy-vline 
WA_REG97_STR-PLOMBDAT sy-vline 
WA_REG97_STR-NUMMER sy-vline 
WA_REG97_STR-EQUNR sy-vline 
WA_REG97_STR-DEVGRP sy-vline 
WA_REG97_STR-BWART sy-vline 
WA_REG97_STR-LGORT sy-vline 
WA_REG97_STR-WERKS sy-vline 
WA_REG97_STR-KOSTL sy-vline 
WA_REG97_STR-WEMPF sy-vline 
WA_REG97_STR-BKTXT sy-vline 
WA_REG97_STR-SOBKZ sy-vline 
WA_REG97_STR-BUDAT sy-vline 
WA_REG97_STR-SPARTYPTXT sy-vline 
WA_REG97_STR-MATNR sy-vline 
WA_REG97_STR-GRUND sy-vline      INTO ld_text SEPARATED BY SPACE.

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