ABAP Select data from SAP table REXCSKLIABPO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCSKLIABPO
*  INTO TABLE @DATA(IT_REXCSKLIABPO2).
*--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_REXCSKLIABPO INDEX 1 INTO DATA(WA_REXCSKLIABPO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCSKLIABPO>-BUKRS = 1.
<REXCSKLIABPO>-GJAHR = 1.
<REXCSKLIABPO>-SPRAVCE = 1.
<REXCSKLIABPO>-NAZSPRAVCE = 1.
<REXCSKLIABPO>-TYPDANP = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCSKLIABPO-X_LIAB_CONTROL, sy-vline,
  WA_REXCSKLIABPO-PERKEY, sy-vline,
  WA_REXCSKLIABPO-MONAT, sy-vline,
  WA_REXCSKLIABPO-POCETSPL, sy-vline,
  WA_REXCSKLIABPO-PORADSPL, sy-vline,
  WA_REXCSKLIABPO-WSUPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCSKLIABPO 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_REXCSKLIABPO 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_REXCSKLIABPO INTO WA_REXCSKLIABPO.


*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 GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_REXCSKLIABPO-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSKLIABPO-GJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PARTNER
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_REXCSKLIABPO-PARTNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSKLIABPO-PARTNER.
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_REXCSKLIABPO_STR, 
BUKRS TYPE STRING,
GJAHR TYPE STRING,
SPRAVCE TYPE STRING,
NAZSPRAVCE TYPE STRING,
TYPDANP TYPE STRING,
X_LIAB_CONTROL TYPE STRING,
PERKEY TYPE STRING,
MONAT TYPE STRING,
POCETSPL TYPE STRING,
PORADSPL TYPE STRING,
WSUPL TYPE STRING,
ZFBDT TYPE STRING,
TAXTOTAL TYPE STRING,
TAXDUE TYPE STRING,
TAXPOSTED TYPE STRING,
TAXTBPOSTED TYPE STRING,
WAERS TYPE STRING,
PARTNER TYPE STRING,
GSBER TYPE STRING,
BVTYP TYPE STRING,
XBLNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCSKLIABPO_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_REXCSKLIABPO_STR-BUKRS sy-vline 
WA_REXCSKLIABPO_STR-GJAHR sy-vline 
WA_REXCSKLIABPO_STR-SPRAVCE sy-vline 
WA_REXCSKLIABPO_STR-NAZSPRAVCE sy-vline 
WA_REXCSKLIABPO_STR-TYPDANP sy-vline 
WA_REXCSKLIABPO_STR-X_LIAB_CONTROL sy-vline 
WA_REXCSKLIABPO_STR-PERKEY sy-vline 
WA_REXCSKLIABPO_STR-MONAT sy-vline 
WA_REXCSKLIABPO_STR-POCETSPL sy-vline 
WA_REXCSKLIABPO_STR-PORADSPL sy-vline 
WA_REXCSKLIABPO_STR-WSUPL sy-vline 
WA_REXCSKLIABPO_STR-ZFBDT sy-vline 
WA_REXCSKLIABPO_STR-TAXTOTAL sy-vline 
WA_REXCSKLIABPO_STR-TAXDUE sy-vline 
WA_REXCSKLIABPO_STR-TAXPOSTED sy-vline 
WA_REXCSKLIABPO_STR-TAXTBPOSTED sy-vline 
WA_REXCSKLIABPO_STR-WAERS sy-vline 
WA_REXCSKLIABPO_STR-PARTNER sy-vline 
WA_REXCSKLIABPO_STR-GSBER sy-vline 
WA_REXCSKLIABPO_STR-BVTYP sy-vline 
WA_REXCSKLIABPO_STR-XBLNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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