ABAP Select data from SAP table FSLSN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FSLSN
*  INTO TABLE @DATA(IT_FSLSN2).
*--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_FSLSN INDEX 1 INTO DATA(WA_FSLSN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FSLSN>-MANDT = 1.
<FSLSN>-SLNUM = 1.
<FSLSN>-LAUNR = 1.
<FSLSN>-SLDCO = 1.
<FSLSN>-SLAEN = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FSLSN-SLDAE, sy-vline,
  WA_FSLSN-SLDZT, sy-vline,
  WA_FSLSN-FSLRE, sy-vline,
  WA_FSLSN-SPRAS, sy-vline,
  WA_FSLSN-NAME1, sy-vline,
  WA_FSLSN-NAME2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FSLSN 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_FSLSN 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_FSLSN INTO WA_FSLSN.


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

*Conversion exit ISOLA, internal->external for field SPRAS
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_FSLSN-SPRAS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FSLSN-SPRAS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field SLNUM_REF
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FSLSN-SLNUM_REF
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FSLSN-SLNUM_REF.
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_FSLSN_STR, 
MANDT TYPE STRING,
SLNUM TYPE STRING,
LAUNR TYPE STRING,
SLDCO TYPE STRING,
SLAEN TYPE STRING,
SLDAE TYPE STRING,
SLDZT TYPE STRING,
FSLRE TYPE STRING,
SPRAS TYPE STRING,
NAME1 TYPE STRING,
NAME2 TYPE STRING,
NAME3 TYPE STRING,
NAME4 TYPE STRING,
NAME_CO TYPE STRING,
SLNUM_REF TYPE STRING,
LAUNR_REF TYPE STRING,
SLLAP TYPE STRING,
SLANR TYPE STRING,
SLPNR TYPE STRING,
SLKW01 TYPE STRING,
SLKW02 TYPE STRING,
SLKW03 TYPE STRING,
SLKW04 TYPE STRING,
SLKW05 TYPE STRING,
SLKW06 TYPE STRING,
SLKW07 TYPE STRING,
SLKW08 TYPE STRING,
SLKW09 TYPE STRING,
SLKW10 TYPE STRING,
SLKW11 TYPE STRING,
SLKW12 TYPE STRING,
SLKW13 TYPE STRING,
SLKW14 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FSLSN_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_FSLSN_STR-MANDT sy-vline 
WA_FSLSN_STR-SLNUM sy-vline 
WA_FSLSN_STR-LAUNR sy-vline 
WA_FSLSN_STR-SLDCO sy-vline 
WA_FSLSN_STR-SLAEN sy-vline 
WA_FSLSN_STR-SLDAE sy-vline 
WA_FSLSN_STR-SLDZT sy-vline 
WA_FSLSN_STR-FSLRE sy-vline 
WA_FSLSN_STR-SPRAS sy-vline 
WA_FSLSN_STR-NAME1 sy-vline 
WA_FSLSN_STR-NAME2 sy-vline 
WA_FSLSN_STR-NAME3 sy-vline 
WA_FSLSN_STR-NAME4 sy-vline 
WA_FSLSN_STR-NAME_CO sy-vline 
WA_FSLSN_STR-SLNUM_REF sy-vline 
WA_FSLSN_STR-LAUNR_REF sy-vline 
WA_FSLSN_STR-SLLAP sy-vline 
WA_FSLSN_STR-SLANR sy-vline 
WA_FSLSN_STR-SLPNR sy-vline 
WA_FSLSN_STR-SLKW01 sy-vline 
WA_FSLSN_STR-SLKW02 sy-vline 
WA_FSLSN_STR-SLKW03 sy-vline 
WA_FSLSN_STR-SLKW04 sy-vline 
WA_FSLSN_STR-SLKW05 sy-vline 
WA_FSLSN_STR-SLKW06 sy-vline 
WA_FSLSN_STR-SLKW07 sy-vline 
WA_FSLSN_STR-SLKW08 sy-vline 
WA_FSLSN_STR-SLKW09 sy-vline 
WA_FSLSN_STR-SLKW10 sy-vline 
WA_FSLSN_STR-SLKW11 sy-vline 
WA_FSLSN_STR-SLKW12 sy-vline 
WA_FSLSN_STR-SLKW13 sy-vline 
WA_FSLSN_STR-SLKW14 sy-vline      INTO ld_text SEPARATED BY SPACE.

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