ABAP Select data from SAP table REGU2_LST 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 REGU2_LST 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 REGU2_LST. 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 REGU2_LST 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_REGU2_LST TYPE STANDARD TABLE OF REGU2_LST,
      WA_REGU2_LST TYPE REGU2_LST,
      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: <REGU2_LST> TYPE REGU2_LST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_REGU2_LST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM REGU2_LST
  INTO TABLE IT_REGU2_LST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REGU2_LST
*  INTO TABLE @DATA(IT_REGU2_LST2).
*--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_REGU2_LST INDEX 1 INTO DATA(WA_REGU2_LST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_REGU2_LST ASSIGNING <REGU2_LST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REGU2_LST>-ZBUKR = 1.
<REGU2_LST>-ZLAND = 1.
<REGU2_LST>-LANDX = 1.
<REGU2_LST>-RZAWE = 1.
<REGU2_LST>-TEXT1 = 1.

ENDLOOP.

LOOP AT IT_REGU2_LST INTO WA_REGU2_LST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REGU2_LST-ANZHL, sy-vline,
  WA_REGU2_LST-WAERS, sy-vline,
  WA_REGU2_LST-RWBTR, sy-vline,
  WA_REGU2_LST-RWSKT, sy-vline,
  WA_REGU2_LST-QSTEU, sy-vline,
  WA_REGU2_LST-WQSTE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REGU2_LST 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_REGU2_LST 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_REGU2_LST INTO WA_REGU2_LST.


*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 AC192, internal->external for field RWBTR
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-RWBTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-RWBTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC192, internal->external for field RWSKT
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-RWSKT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-RWSKT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC192, internal->external for field QSTEU
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-QSTEU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-QSTEU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC192, internal->external for field WQSTE
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-WQSTE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-WQSTE.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field ABZUG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-ABZUG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-ABZUG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WABZG
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-WABZG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-WABZG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BRUTT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-BRUTT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-BRUTT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WBRUT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-WBRUT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-WBRUT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field NETTO
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-NETTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-NETTO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field WNETT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-WNETT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-WNETT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC192, internal->external for field RBETR
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-RBETR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-RBETR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC192, internal->external for field RSKON
CALL FUNCTION 'CONVERSION_EXIT_AC192_OUTPUT'
  EXPORTING
    input =                      WA_REGU2_LST-RSKON
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGU2_LST-RSKON.
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_REGU2_LST_STR, 
ZBUKR TYPE STRING,
ZLAND TYPE STRING,
LANDX TYPE STRING,
RZAWE TYPE STRING,
TEXT1 TYPE STRING,
ANZHL TYPE STRING,
WAERS TYPE STRING,
RWBTR TYPE STRING,
RWSKT TYPE STRING,
QSTEU TYPE STRING,
WQSTE TYPE STRING,
ABZUG TYPE STRING,
WABZG TYPE STRING,
BRUTT TYPE STRING,
WBRUT TYPE STRING,
NETTO TYPE STRING,
WNETT TYPE STRING,
HWAER TYPE STRING,
RBETR TYPE STRING,
RSKON TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REGU2_LST_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_REGU2_LST_STR-ZBUKR sy-vline 
WA_REGU2_LST_STR-ZLAND sy-vline 
WA_REGU2_LST_STR-LANDX sy-vline 
WA_REGU2_LST_STR-RZAWE sy-vline 
WA_REGU2_LST_STR-TEXT1 sy-vline 
WA_REGU2_LST_STR-ANZHL sy-vline 
WA_REGU2_LST_STR-WAERS sy-vline 
WA_REGU2_LST_STR-RWBTR sy-vline 
WA_REGU2_LST_STR-RWSKT sy-vline 
WA_REGU2_LST_STR-QSTEU sy-vline 
WA_REGU2_LST_STR-WQSTE sy-vline 
WA_REGU2_LST_STR-ABZUG sy-vline 
WA_REGU2_LST_STR-WABZG sy-vline 
WA_REGU2_LST_STR-BRUTT sy-vline 
WA_REGU2_LST_STR-WBRUT sy-vline 
WA_REGU2_LST_STR-NETTO sy-vline 
WA_REGU2_LST_STR-WNETT sy-vline 
WA_REGU2_LST_STR-HWAER sy-vline 
WA_REGU2_LST_STR-RBETR sy-vline 
WA_REGU2_LST_STR-RSKON sy-vline      INTO ld_text SEPARATED BY SPACE.

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