ABAP Select data from SAP table FDLF2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FDLF2 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 FDLF2. 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 FDLF2 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_FDLF2 TYPE STANDARD TABLE OF FDLF2,
      WA_FDLF2 TYPE FDLF2,
      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: <FDLF2> TYPE FDLF2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FDLF2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FDLF2
  INTO TABLE IT_FDLF2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FDLF2
*  INTO TABLE @DATA(IT_FDLF22).
*--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_FDLF2 INDEX 1 INTO DATA(WA_FDLF22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FDLF2 ASSIGNING <FDLF2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FDLF2>-MANDT = 1.
<FDLF2>-WBELN = 1.
<FDLF2>-LNRZB = 1.
<FDLF2>-KUNRG = 1.
<FDLF2>-ZFBDT = 1.

ENDLOOP.

LOOP AT IT_FDLF2 INTO WA_FDLF2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FDLF2-POSNR_CM, sy-vline,
  WA_FDLF2-WAERL, sy-vline,
  WA_FDLF2-BUKRS, sy-vline,
  WA_FDLF2-GSBER, sy-vline,
  WA_FDLF2-BRTWR, sy-vline,
  WA_FDLF2-FDGRP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FDLF2 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_FDLF2 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_FDLF2 INTO WA_FDLF2.


*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 WBELN
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-WBELN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-WBELN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field LNRZB
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-LNRZB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-LNRZB.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field KUNRG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-KUNRG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-KUNRG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field FDGRP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-FDGRP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-FDGRP.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field FDWBT
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-FDWBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-FDWBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC152, internal->external for field FDDBT
CALL FUNCTION 'CONVERSION_EXIT_AC152_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-FDDBT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-FDDBT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field PRCTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FDLF2-PRCTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FDLF2-PRCTR.
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_FDLF2_STR, 
MANDT TYPE STRING,
WBELN TYPE STRING,
LNRZB TYPE STRING,
KUNRG TYPE STRING,
ZFBDT TYPE STRING,
POSNR_CM TYPE STRING,
WAERL TYPE STRING,
BUKRS TYPE STRING,
GSBER TYPE STRING,
BRTWR TYPE STRING,
FDGRP TYPE STRING,
FDLEV TYPE STRING,
FDTAG TYPE STRING,
FDWBT TYPE STRING,
FDDBT TYPE STRING,
PRCTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FDLF2_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_FDLF2_STR-MANDT sy-vline 
WA_FDLF2_STR-WBELN sy-vline 
WA_FDLF2_STR-LNRZB sy-vline 
WA_FDLF2_STR-KUNRG sy-vline 
WA_FDLF2_STR-ZFBDT sy-vline 
WA_FDLF2_STR-POSNR_CM sy-vline 
WA_FDLF2_STR-WAERL sy-vline 
WA_FDLF2_STR-BUKRS sy-vline 
WA_FDLF2_STR-GSBER sy-vline 
WA_FDLF2_STR-BRTWR sy-vline 
WA_FDLF2_STR-FDGRP sy-vline 
WA_FDLF2_STR-FDLEV sy-vline 
WA_FDLF2_STR-FDTAG sy-vline 
WA_FDLF2_STR-FDWBT sy-vline 
WA_FDLF2_STR-FDDBT sy-vline 
WA_FDLF2_STR-PRCTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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