ABAP Select data from SAP table W1A_T_DEBI into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP W1A_T_DEBI 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 W1A_T_DEBI. 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 W1A_T_DEBI 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_W1A_T_DEBI TYPE STANDARD TABLE OF W1A_T_DEBI,
      WA_W1A_T_DEBI TYPE W1A_T_DEBI,
      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: <W1A_T_DEBI> TYPE W1A_T_DEBI.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_W1A_T_DEBI.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM W1A_T_DEBI
  INTO TABLE IT_W1A_T_DEBI.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM W1A_T_DEBI
*  INTO TABLE @DATA(IT_W1A_T_DEBI2).
*--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_W1A_T_DEBI INDEX 1 INTO DATA(WA_W1A_T_DEBI2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_W1A_T_DEBI ASSIGNING <W1A_T_DEBI>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<W1A_T_DEBI>-TAXGR = 1.
<W1A_T_DEBI>-WARNG = 1.
<W1A_T_DEBI>-WRNEX = 1.
<W1A_T_DEBI>-TEXT30 = 1.
<W1A_T_DEBI>-AGTDF = 1.

ENDLOOP.

LOOP AT IT_W1A_T_DEBI INTO WA_W1A_T_DEBI.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_W1A_T_DEBI-AFTDT, sy-vline,
  WA_W1A_T_DEBI-SBJDF, sy-vline,
  WA_W1A_T_DEBI-SBJDT, sy-vline,
  WA_W1A_T_DEBI-EXRT, sy-vline,
  WA_W1A_T_DEBI-EXDF, sy-vline,
  WA_W1A_T_DEBI-EXDT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_W1A_T_DEBI 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_W1A_T_DEBI 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_W1A_T_DEBI INTO WA_W1A_T_DEBI.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_W1A_T_DEBI_STR, 
TAXGR TYPE STRING,
WARNG TYPE STRING,
WRNEX TYPE STRING,
TEXT30 TYPE STRING,
AGTDF TYPE STRING,
AFTDT TYPE STRING,
SBJDF TYPE STRING,
SBJDT TYPE STRING,
EXRT TYPE STRING,
EXDF TYPE STRING,
EXDT TYPE STRING,
EXNR TYPE STRING,
TEXT40 TYPE STRING,
EXMPTVALID TYPE STRING,
AMPEL TYPE STRING,
KSCH1 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_W1A_T_DEBI_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_W1A_T_DEBI_STR-TAXGR sy-vline 
WA_W1A_T_DEBI_STR-WARNG sy-vline 
WA_W1A_T_DEBI_STR-WRNEX sy-vline 
WA_W1A_T_DEBI_STR-TEXT30 sy-vline 
WA_W1A_T_DEBI_STR-AGTDF sy-vline 
WA_W1A_T_DEBI_STR-AFTDT sy-vline 
WA_W1A_T_DEBI_STR-SBJDF sy-vline 
WA_W1A_T_DEBI_STR-SBJDT sy-vline 
WA_W1A_T_DEBI_STR-EXRT sy-vline 
WA_W1A_T_DEBI_STR-EXDF sy-vline 
WA_W1A_T_DEBI_STR-EXDT sy-vline 
WA_W1A_T_DEBI_STR-EXNR sy-vline 
WA_W1A_T_DEBI_STR-TEXT40 sy-vline 
WA_W1A_T_DEBI_STR-EXMPTVALID sy-vline 
WA_W1A_T_DEBI_STR-AMPEL sy-vline 
WA_W1A_T_DEBI_STR-KSCH1 sy-vline      INTO ld_text SEPARATED BY SPACE.

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