ABAP Select data from SAP table FC01SLST into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FC01SLST 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 FC01SLST. 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 FC01SLST 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_FC01SLST TYPE STANDARD TABLE OF FC01SLST,
      WA_FC01SLST TYPE FC01SLST,
      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: <FC01SLST> TYPE FC01SLST.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FC01SLST.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FC01SLST
  INTO TABLE IT_FC01SLST.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FC01SLST
*  INTO TABLE @DATA(IT_FC01SLST2).
*--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_FC01SLST INDEX 1 INTO DATA(WA_FC01SLST2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FC01SLST ASSIGNING <FC01SLST>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FC01SLST>-SUMIND = 1.
<FC01SLST>-AWTYP = 1.
<FC01SLST>-LOGSYS = 1.
<FC01SLST>-LCRIT = 1.
<FC01SLST>-LCRIT2 = 1.

ENDLOOP.

LOOP AT IT_FC01SLST INTO WA_FC01SLST.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FC01SLST-HEAD, sy-vline,
  WA_FC01SLST-DATA, sy-vline,
  WA_FC01SLST-MANDT, sy-vline,
  WA_FC01SLST-SITYP, sy-vline,
  WA_FC01SLST-SITEM, sy-vline,
  WA_FC01SLST-SIGN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FC01SLST 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_FC01SLST 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_FC01SLST INTO WA_FC01SLST.


*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 LOGSYS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FC01SLST-LOGSYS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC01SLST-LOGSYS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field LANGU
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_FC01SLST-LANGU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC01SLST-LANGU.
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_FC01SLST_STR, 
SUMIND TYPE STRING,
AWTYP TYPE STRING,
LOGSYS TYPE STRING,
LCRIT TYPE STRING,
LCRIT2 TYPE STRING,
HEAD TYPE STRING,
DATA TYPE STRING,
MANDT TYPE STRING,
SITYP TYPE STRING,
SITEM TYPE STRING,
SIGN TYPE STRING,
UPCFO TYPE STRING,
FMLIND TYPE STRING,
CFIND TYPE STRING,
SDEIND TYPE STRING,
CYIND TYPE STRING,
UPRET TYPE STRING,
UPACQ TYPE STRING,
UPMER TYPE STRING,
ERRNR TYPE STRING,
ERRNRH TYPE STRING,
TXTNR TYPE STRING,
TXTSH TYPE STRING,
TXTMI TYPE STRING,
SEQNR TYPE STRING,
TXTLG TYPE STRING,
LANGU TYPE STRING,
MSGID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FC01SLST_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_FC01SLST_STR-SUMIND sy-vline 
WA_FC01SLST_STR-AWTYP sy-vline 
WA_FC01SLST_STR-LOGSYS sy-vline 
WA_FC01SLST_STR-LCRIT sy-vline 
WA_FC01SLST_STR-LCRIT2 sy-vline 
WA_FC01SLST_STR-HEAD sy-vline 
WA_FC01SLST_STR-DATA sy-vline 
WA_FC01SLST_STR-MANDT sy-vline 
WA_FC01SLST_STR-SITYP sy-vline 
WA_FC01SLST_STR-SITEM sy-vline 
WA_FC01SLST_STR-SIGN sy-vline 
WA_FC01SLST_STR-UPCFO sy-vline 
WA_FC01SLST_STR-FMLIND sy-vline 
WA_FC01SLST_STR-CFIND sy-vline 
WA_FC01SLST_STR-SDEIND sy-vline 
WA_FC01SLST_STR-CYIND sy-vline 
WA_FC01SLST_STR-UPRET sy-vline 
WA_FC01SLST_STR-UPACQ sy-vline 
WA_FC01SLST_STR-UPMER sy-vline 
WA_FC01SLST_STR-ERRNR sy-vline 
WA_FC01SLST_STR-ERRNRH sy-vline 
WA_FC01SLST_STR-TXTNR sy-vline 
WA_FC01SLST_STR-TXTSH sy-vline 
WA_FC01SLST_STR-TXTMI sy-vline 
WA_FC01SLST_STR-SEQNR sy-vline 
WA_FC01SLST_STR-TXTLG sy-vline 
WA_FC01SLST_STR-LANGU sy-vline 
WA_FC01SLST_STR-MSGID sy-vline      INTO ld_text SEPARATED BY SPACE.

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