ABAP Select data from SAP table REGUHM_LST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP REGUHM_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 REGUHM_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 REGUHM_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_REGUHM_LST TYPE STANDARD TABLE OF REGUHM_LST,
      WA_REGUHM_LST TYPE REGUHM_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: <REGUHM_LST> TYPE REGUHM_LST.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REGUHM_LST
*  INTO TABLE @DATA(IT_REGUHM_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_REGUHM_LST INDEX 1 INTO DATA(WA_REGUHM_LST2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REGUHM_LST>-MANDT = 1.
<REGUHM_LST>-LAUFD = 1.
<REGUHM_LST>-LAUFI = 1.
<REGUHM_LST>-ZBUKR = 1.
<REGUHM_LST>-LIFNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REGUHM_LST-KUNNR, sy-vline,
  WA_REGUHM_LST-EMPFG, sy-vline,
  WA_REGUHM_LST-VBLNR, sy-vline,
  WA_REGUHM_LST-LAUFD_M, sy-vline,
  WA_REGUHM_LST-LAUFI_M, sy-vline,
  WA_REGUHM_LST-HBKID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REGUHM_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_REGUHM_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_REGUHM_LST INTO WA_REGUHM_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 ALPHA, internal->external for field LIFNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REGUHM_LST-LIFNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGUHM_LST-LIFNR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit AC132, internal->external for field RBETR
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_REGUHM_LST-RBETR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REGUHM_LST-RBETR.
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_REGUHM_LST_STR, 
MANDT TYPE STRING,
LAUFD TYPE STRING,
LAUFI TYPE STRING,
ZBUKR TYPE STRING,
LIFNR TYPE STRING,
KUNNR TYPE STRING,
EMPFG TYPE STRING,
VBLNR TYPE STRING,
LAUFD_M TYPE STRING,
LAUFI_M TYPE STRING,
HBKID TYPE STRING,
HKTID TYPE STRING,
RZAWE TYPE STRING,
UZAWE TYPE STRING,
WAERS TYPE STRING,
ZALDT TYPE STRING,
VALUT TYPE STRING,
CRVAL TYPE STRING,
AUSFD TYPE STRING,
BATCHNO TYPE STRING,
SAKNR TYPE STRING,
PERNR TYPE STRING,
RWBTR TYPE STRING,
HWAER TYPE STRING,
RBETR TYPE STRING,
ZNME1 TYPE STRING,
ZNME2 TYPE STRING,
ZORT1 TYPE STRING,
ZLAND TYPE STRING,
ZBNKS TYPE STRING,
ZBNKY TYPE STRING,
ZBNKL TYPE STRING,
ZBNKN TYPE STRING,
ZBKON TYPE STRING,
BKREF TYPE STRING,
BVTYP TYPE STRING,
KOINH TYPE STRING,
BUSAB TYPE STRING,
RPOST TYPE STRING,
XDONE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REGUHM_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_REGUHM_LST_STR-MANDT sy-vline 
WA_REGUHM_LST_STR-LAUFD sy-vline 
WA_REGUHM_LST_STR-LAUFI sy-vline 
WA_REGUHM_LST_STR-ZBUKR sy-vline 
WA_REGUHM_LST_STR-LIFNR sy-vline 
WA_REGUHM_LST_STR-KUNNR sy-vline 
WA_REGUHM_LST_STR-EMPFG sy-vline 
WA_REGUHM_LST_STR-VBLNR sy-vline 
WA_REGUHM_LST_STR-LAUFD_M sy-vline 
WA_REGUHM_LST_STR-LAUFI_M sy-vline 
WA_REGUHM_LST_STR-HBKID sy-vline 
WA_REGUHM_LST_STR-HKTID sy-vline 
WA_REGUHM_LST_STR-RZAWE sy-vline 
WA_REGUHM_LST_STR-UZAWE sy-vline 
WA_REGUHM_LST_STR-WAERS sy-vline 
WA_REGUHM_LST_STR-ZALDT sy-vline 
WA_REGUHM_LST_STR-VALUT sy-vline 
WA_REGUHM_LST_STR-CRVAL sy-vline 
WA_REGUHM_LST_STR-AUSFD sy-vline 
WA_REGUHM_LST_STR-BATCHNO sy-vline 
WA_REGUHM_LST_STR-SAKNR sy-vline 
WA_REGUHM_LST_STR-PERNR sy-vline 
WA_REGUHM_LST_STR-RWBTR sy-vline 
WA_REGUHM_LST_STR-HWAER sy-vline 
WA_REGUHM_LST_STR-RBETR sy-vline 
WA_REGUHM_LST_STR-ZNME1 sy-vline 
WA_REGUHM_LST_STR-ZNME2 sy-vline 
WA_REGUHM_LST_STR-ZORT1 sy-vline 
WA_REGUHM_LST_STR-ZLAND sy-vline 
WA_REGUHM_LST_STR-ZBNKS sy-vline 
WA_REGUHM_LST_STR-ZBNKY sy-vline 
WA_REGUHM_LST_STR-ZBNKL sy-vline 
WA_REGUHM_LST_STR-ZBNKN sy-vline 
WA_REGUHM_LST_STR-ZBKON sy-vline 
WA_REGUHM_LST_STR-BKREF sy-vline 
WA_REGUHM_LST_STR-BVTYP sy-vline 
WA_REGUHM_LST_STR-KOINH sy-vline 
WA_REGUHM_LST_STR-BUSAB sy-vline 
WA_REGUHM_LST_STR-RPOST sy-vline 
WA_REGUHM_LST_STR-XDONE sy-vline      INTO ld_text SEPARATED BY SPACE.

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