ABAP Select data from SAP table DFKKWLIA_AC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DFKKWLIA_AC
*  INTO TABLE @DATA(IT_DFKKWLIA_AC2).
*--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_DFKKWLIA_AC INDEX 1 INTO DATA(WA_DFKKWLIA_AC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DFKKWLIA_AC>-MANDT = 1.
<DFKKWLIA_AC>-WLITYPE = 1.
<DFKKWLIA_AC>-WLIGUID = 1.
<DFKKWLIA_AC>-ACNR = 1.
<DFKKWLIA_AC>-ACID = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DFKKWLIA_AC-ACPROF, sy-vline,
  WA_DFKKWLIA_AC-ACSTAT, sy-vline,
  WA_DFKKWLIA_AC-ACDATEAR, sy-vline,
  WA_DFKKWLIA_AC-ACDATLAT, sy-vline,
  WA_DFKKWLIA_AC-REACTDAT, sy-vline,
  WA_DFKKWLIA_AC-ACMAND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DFKKWLIA_AC 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_DFKKWLIA_AC 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_DFKKWLIA_AC INTO WA_DFKKWLIA_AC.


*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_DFKKWLIA_AC_STR, 
MANDT TYPE STRING,
WLITYPE TYPE STRING,
WLIGUID TYPE STRING,
ACNR TYPE STRING,
ACID TYPE STRING,
ACPROF TYPE STRING,
ACSTAT TYPE STRING,
ACDATEAR TYPE STRING,
ACDATLAT TYPE STRING,
REACTDAT TYPE STRING,
ACMAND TYPE STRING,
ERNAM TYPE STRING,
ERDAT TYPE STRING,
ERTIM TYPE STRING,
AEDAT TYPE STRING,
AETIM TYPE STRING,
AENAM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DFKKWLIA_AC_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_DFKKWLIA_AC_STR-MANDT sy-vline 
WA_DFKKWLIA_AC_STR-WLITYPE sy-vline 
WA_DFKKWLIA_AC_STR-WLIGUID sy-vline 
WA_DFKKWLIA_AC_STR-ACNR sy-vline 
WA_DFKKWLIA_AC_STR-ACID sy-vline 
WA_DFKKWLIA_AC_STR-ACPROF sy-vline 
WA_DFKKWLIA_AC_STR-ACSTAT sy-vline 
WA_DFKKWLIA_AC_STR-ACDATEAR sy-vline 
WA_DFKKWLIA_AC_STR-ACDATLAT sy-vline 
WA_DFKKWLIA_AC_STR-REACTDAT sy-vline 
WA_DFKKWLIA_AC_STR-ACMAND sy-vline 
WA_DFKKWLIA_AC_STR-ERNAM sy-vline 
WA_DFKKWLIA_AC_STR-ERDAT sy-vline 
WA_DFKKWLIA_AC_STR-ERTIM sy-vline 
WA_DFKKWLIA_AC_STR-AEDAT sy-vline 
WA_DFKKWLIA_AC_STR-AETIM sy-vline 
WA_DFKKWLIA_AC_STR-AENAM sy-vline      INTO ld_text SEPARATED BY SPACE.

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