ABAP Select data from SAP table REG75_ZW into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP REG75_ZW 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_ZW. 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_ZW 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_ZW TYPE STANDARD TABLE OF REG75_ZW,
      WA_REG75_ZW TYPE REG75_ZW,
      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_ZW> TYPE REG75_ZW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REG75_ZW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REG75_ZW
  INTO TABLE IT_REG75_ZW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REG75_ZW
*  INTO TABLE @DATA(IT_REG75_ZW2).
*--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_ZW INDEX 1 INTO DATA(WA_REG75_ZW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REG75_ZW ASSIGNING <REG75_ZW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REG75_ZW>-MANDT = 1.
<REG75_ZW>-AB = 1.
<REG75_ZW>-BIS = 1.
<REG75_ZW>-INDEXNR = 1.
<REG75_ZW>-LOGIKZW = 1.

ENDLOOP.

LOOP AT IT_REG75_ZW INTO WA_REG75_ZW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REG75_ZW-INT_UI, sy-vline,
  WA_REG75_ZW-EXT_UI, sy-vline,
  WA_REG75_ZW-MORE_UI, sy-vline,
  WA_REG75_ZW-ZWZUART, sy-vline,
  WA_REG75_ZW-ZWZUARTTXT, sy-vline,
  WA_REG75_ZW-DEVLOC, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REG75_ZW 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_ZW 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_ZW INTO WA_REG75_ZW.


*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_REG75_ZW-DEVLOC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75_ZW-DEVLOC.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GERNR, internal->external for field GERAET
CALL FUNCTION 'CONVERSION_EXIT_GERNR_OUTPUT'
  EXPORTING
    input =                      WA_REG75_ZW-GERAET
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75_ZW-GERAET.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_REG75_ZW-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75_ZW-MATNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EQUNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REG75_ZW-EQUNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REG75_ZW-EQUNR.
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_ZW_STR, 
MANDT TYPE STRING,
AB TYPE STRING,
BIS TYPE STRING,
INDEXNR TYPE STRING,
LOGIKZW TYPE STRING,
INT_UI TYPE STRING,
EXT_UI TYPE STRING,
MORE_UI TYPE STRING,
ZWZUART TYPE STRING,
ZWZUARTTXT TYPE STRING,
DEVLOC TYPE STRING,
OPCODETXT TYPE STRING,
ONLY_BILLING_REL TYPE STRING,
ZWKENN TYPE STRING,
KENNZIFF TYPE STRING,
ZWART TYPE STRING,
ZWTYP TYPE STRING,
BLIWIRK TYPE STRING,
GERAET TYPE STRING,
MATNR TYPE STRING,
SPARTE TYPE STRING,
EQUNR TYPE STRING,
OPCODE TYPE STRING,
ZWNUMMER TYPE STRING,
LINE_MARK TYPE STRING,
NEW_INDEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REG75_ZW_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_ZW_STR-MANDT sy-vline 
WA_REG75_ZW_STR-AB sy-vline 
WA_REG75_ZW_STR-BIS sy-vline 
WA_REG75_ZW_STR-INDEXNR sy-vline 
WA_REG75_ZW_STR-LOGIKZW sy-vline 
WA_REG75_ZW_STR-INT_UI sy-vline 
WA_REG75_ZW_STR-EXT_UI sy-vline 
WA_REG75_ZW_STR-MORE_UI sy-vline 
WA_REG75_ZW_STR-ZWZUART sy-vline 
WA_REG75_ZW_STR-ZWZUARTTXT sy-vline 
WA_REG75_ZW_STR-DEVLOC sy-vline 
WA_REG75_ZW_STR-OPCODETXT sy-vline 
WA_REG75_ZW_STR-ONLY_BILLING_REL sy-vline 
WA_REG75_ZW_STR-ZWKENN sy-vline 
WA_REG75_ZW_STR-KENNZIFF sy-vline 
WA_REG75_ZW_STR-ZWART sy-vline 
WA_REG75_ZW_STR-ZWTYP sy-vline 
WA_REG75_ZW_STR-BLIWIRK sy-vline 
WA_REG75_ZW_STR-GERAET sy-vline 
WA_REG75_ZW_STR-MATNR sy-vline 
WA_REG75_ZW_STR-SPARTE sy-vline 
WA_REG75_ZW_STR-EQUNR sy-vline 
WA_REG75_ZW_STR-OPCODE sy-vline 
WA_REG75_ZW_STR-ZWNUMMER sy-vline 
WA_REG75_ZW_STR-LINE_MARK sy-vline 
WA_REG75_ZW_STR-NEW_INDEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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