ABAP Select data from SAP table FKKL1_LSTYP 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 FKKL1_LSTYP 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 FKKL1_LSTYP. 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 FKKL1_LSTYP 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_FKKL1_LSTYP TYPE STANDARD TABLE OF FKKL1_LSTYP,
      WA_FKKL1_LSTYP TYPE FKKL1_LSTYP,
      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: <FKKL1_LSTYP> TYPE FKKL1_LSTYP.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FKKL1_LSTYP.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FKKL1_LSTYP
  INTO TABLE IT_FKKL1_LSTYP.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FKKL1_LSTYP
*  INTO TABLE @DATA(IT_FKKL1_LSTYP2).
*--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_FKKL1_LSTYP INDEX 1 INTO DATA(WA_FKKL1_LSTYP2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FKKL1_LSTYP ASSIGNING <FKKL1_LSTYP>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FKKL1_LSTYP>-XAWOP = 1.
<FKKL1_LSTYP>-XAWAP = 1.
<FKKL1_LSTYP>-ANDPA = 1.
<FKKL1_LSTYP>-STAKNO = 1.
<FKKL1_LSTYP>-SZAHL = 1.

ENDLOOP.

LOOP AT IT_FKKL1_LSTYP INTO WA_FKKL1_LSTYP.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FKKL1_LSTYP-STAK, sy-vline,
  WA_FKKL1_LSTYP-STAKA, sy-vline,
  WA_FKKL1_LSTYP-STAKB, sy-vline,
  WA_FKKL1_LSTYP-STAKG, sy-vline,
  WA_FKKL1_LSTYP-STAKP, sy-vline,
  WA_FKKL1_LSTYP-STAKR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FKKL1_LSTYP 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_FKKL1_LSTYP 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_FKKL1_LSTYP INTO WA_FKKL1_LSTYP.


*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_FKKL1_LSTYP_STR, 
XAWOP TYPE STRING,
XAWAP TYPE STRING,
ANDPA TYPE STRING,
STAKNO TYPE STRING,
SZAHL TYPE STRING,
STAK TYPE STRING,
STAKA TYPE STRING,
STAKB TYPE STRING,
STAKG TYPE STRING,
STAKP TYPE STRING,
STAKR TYPE STRING,
STAKS TYPE STRING,
STAKZ TYPE STRING,
PNORM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FKKL1_LSTYP_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_FKKL1_LSTYP_STR-XAWOP sy-vline 
WA_FKKL1_LSTYP_STR-XAWAP sy-vline 
WA_FKKL1_LSTYP_STR-ANDPA sy-vline 
WA_FKKL1_LSTYP_STR-STAKNO sy-vline 
WA_FKKL1_LSTYP_STR-SZAHL sy-vline 
WA_FKKL1_LSTYP_STR-STAK sy-vline 
WA_FKKL1_LSTYP_STR-STAKA sy-vline 
WA_FKKL1_LSTYP_STR-STAKB sy-vline 
WA_FKKL1_LSTYP_STR-STAKG sy-vline 
WA_FKKL1_LSTYP_STR-STAKP sy-vline 
WA_FKKL1_LSTYP_STR-STAKR sy-vline 
WA_FKKL1_LSTYP_STR-STAKS sy-vline 
WA_FKKL1_LSTYP_STR-STAKZ sy-vline 
WA_FKKL1_LSTYP_STR-PNORM sy-vline      INTO ld_text SEPARATED BY SPACE.

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