ABAP Select data from SAP table REG75 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REG75 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 REG75. 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 REG75 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_REG75 TYPE STANDARD TABLE OF REG75,
      WA_REG75 TYPE REG75,
      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: <REG75> TYPE REG75.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REG75.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REG75
  INTO TABLE IT_REG75.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REG75
*  INTO TABLE @DATA(IT_REG752).
*--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_REG75 INDEX 1 INTO DATA(WA_REG752).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REG75 ASSIGNING <REG75>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REG75>-MANDT = 1.
<REG75>-ANLAGE = 1.
<REG75>-SPARTE = 1.
<REG75>-AB = 1.
<REG75>-BIS = 1.

ENDLOOP.

LOOP AT IT_REG75 INTO WA_REG75.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REG75-STICHTAG, sy-vline,
  WA_REG75-ZWZUARTTXT, sy-vline,
  WA_REG75-ZWZUART, sy-vline,
  WA_REG75-DEVLOC, sy-vline,
  WA_REG75-GERAET, sy-vline,
  WA_REG75-MATNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REG75 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_REG75 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_REG75 INTO WA_REG75.


*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 ANLAGE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG75-ANLAGE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-ANLAGE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TPLNR, internal->external for field DEVLOC
CALL FUNCTION 'CONVERSION_EXIT_TPLNR_OUTPUT'
  EXPORTING
    input =                      WA_REG75-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-DEVLOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG75-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-GERAET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG75-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG75-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-EQUNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ZWGRUPPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG75-ZWGRUPPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75-ZWGRUPPE.
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_REG75_STR, 
MANDT TYPE STRING,
ANLAGE TYPE STRING,
SPARTE TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
STICHTAG TYPE STRING,
ZWZUARTTXT TYPE STRING,
ZWZUART TYPE STRING,
DEVLOC TYPE STRING,
GERAET TYPE STRING,
MATNR TYPE STRING,
EQUNR TYPE STRING,
INDEXNR TYPE STRING,
ZWNUMMER TYPE STRING,
ZWGRUPPE TYPE STRING,
ONLY_BILLING_REL TYPE STRING,
PRORATE TYPE STRING,
PRUEFGR TYPE STRING,
PRUEFGRTXT TYPE STRING,
AUTOEND TYPE STRING,
DEFAULT_ZWBEZ TYPE STRING,
HISTORY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REG75_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_REG75_STR-MANDT sy-vline 
WA_REG75_STR-ANLAGE sy-vline 
WA_REG75_STR-SPARTE sy-vline 
WA_REG75_STR-AB sy-vline 
WA_REG75_STR-BIS sy-vline 
WA_REG75_STR-STICHTAG sy-vline 
WA_REG75_STR-ZWZUARTTXT sy-vline 
WA_REG75_STR-ZWZUART sy-vline 
WA_REG75_STR-DEVLOC sy-vline 
WA_REG75_STR-GERAET sy-vline 
WA_REG75_STR-MATNR sy-vline 
WA_REG75_STR-EQUNR sy-vline 
WA_REG75_STR-INDEXNR sy-vline 
WA_REG75_STR-ZWNUMMER sy-vline 
WA_REG75_STR-ZWGRUPPE sy-vline 
WA_REG75_STR-ONLY_BILLING_REL sy-vline 
WA_REG75_STR-PRORATE sy-vline 
WA_REG75_STR-PRUEFGR sy-vline 
WA_REG75_STR-PRUEFGRTXT sy-vline 
WA_REG75_STR-AUTOEND sy-vline 
WA_REG75_STR-DEFAULT_ZWBEZ sy-vline 
WA_REG75_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.