ABAP Select data from SAP table REG72 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REG72 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 REG72. 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 REG72 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_REG72 TYPE STANDARD TABLE OF REG72,
      WA_REG72 TYPE REG72,
      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: <REG72> TYPE REG72.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REG72.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REG72
  INTO TABLE IT_REG72.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REG72
*  INTO TABLE @DATA(IT_REG722).
*--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_REG72 INDEX 1 INTO DATA(WA_REG722).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REG72 ASSIGNING <REG72>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REG72>-DEVLOC = 1.
<REG72>-ADDRLINE2 = 1.
<REG72>-ANLAGE = 1.
<REG72>-SPARTE = 1.
<REG72>-VTEXT = 1.

ENDLOOP.

LOOP AT IT_REG72 INTO WA_REG72.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REG72-GERAET, sy-vline,
  WA_REG72-GERTYP, sy-vline,
  WA_REG72-SPARTEG, sy-vline,
  WA_REG72-EQUNR, sy-vline,
  WA_REG72-AB, sy-vline,
  WA_REG72-BIS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REG72 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_REG72 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_REG72 INTO WA_REG72.


*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 TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_REG72-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-DEVLOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG72-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-ANLAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG72-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-GERAET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field GERTYP
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG72-GERTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-GERTYP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG72-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field VSTELLE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG72-VSTELLE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG72-VSTELLE.
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_REG72_STR, 
DEVLOC TYPE STRING,
ADDRLINE2 TYPE STRING,
ANLAGE TYPE STRING,
SPARTE TYPE STRING,
VTEXT TYPE STRING,
GERAET TYPE STRING,
GERTYP TYPE STRING,
SPARTEG TYPE STRING,
EQUNR TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
STICHTAG TYPE STRING,
PRORATE TYPE STRING,
VSTELLE TYPE STRING,
ADDRLINE1 TYPE STRING,
HISTORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REG72_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_REG72_STR-DEVLOC sy-vline 
WA_REG72_STR-ADDRLINE2 sy-vline 
WA_REG72_STR-ANLAGE sy-vline 
WA_REG72_STR-SPARTE sy-vline 
WA_REG72_STR-VTEXT sy-vline 
WA_REG72_STR-GERAET sy-vline 
WA_REG72_STR-GERTYP sy-vline 
WA_REG72_STR-SPARTEG sy-vline 
WA_REG72_STR-EQUNR sy-vline 
WA_REG72_STR-AB sy-vline 
WA_REG72_STR-BIS sy-vline 
WA_REG72_STR-STICHTAG sy-vline 
WA_REG72_STR-PRORATE sy-vline 
WA_REG72_STR-VSTELLE sy-vline 
WA_REG72_STR-ADDRLINE1 sy-vline 
WA_REG72_STR-HISTORY sy-vline      INTO ld_text SEPARATED BY SPACE.

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