ABAP Select data from SAP table FGL_INDEX_TABLE_FIELDS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FGL_INDEX_TABLE_FIELDS
*  INTO TABLE @DATA(IT_FGL_INDEX_TABLE_FIELDS2).
*--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_FGL_INDEX_TABLE_FIELDS INDEX 1 INTO DATA(WA_FGL_INDEX_TABLE_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FGL_INDEX_TABLE_FIELDS>-BDIF2 = 1.
<FGL_INDEX_TABLE_FIELDS>-BDIF3 = 1.
<FGL_INDEX_TABLE_FIELDS>-BDIFF = 1.
<FGL_INDEX_TABLE_FIELDS>-CCBTC = 1.
<FGL_INDEX_TABLE_FIELDS>-DABRZ = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FGL_INDEX_TABLE_FIELDS-FKONT, sy-vline,
  WA_FGL_INDEX_TABLE_FIELDS-IMKEY, sy-vline,
  WA_FGL_INDEX_TABLE_FIELDS-INTRENO, sy-vline,
  WA_FGL_INDEX_TABLE_FIELDS-MWST2, sy-vline,
  WA_FGL_INDEX_TABLE_FIELDS-MWST3, sy-vline,
  WA_FGL_INDEX_TABLE_FIELDS-MWSTS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FGL_INDEX_TABLE_FIELDS 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_FGL_INDEX_TABLE_FIELDS 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_FGL_INDEX_TABLE_FIELDS INTO WA_FGL_INDEX_TABLE_FIELDS.


*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 AC132, internal->external for field BDIF2
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-BDIF2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-BDIF2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field BDIF3
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-BDIF3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-BDIF3.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit IMKEY, internal->external for field IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-IMKEY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field MWST2
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-MWST2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-MWST2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field MWST3
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-MWST3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-MWST3.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AU132, internal->external for field MWSTS
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-MWSTS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-MWSTS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field PPDIF2
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-PPDIF2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-PPDIF2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AC132, internal->external for field PPDIF3
CALL FUNCTION 'CONVERSION_EXIT_AC132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-PPDIF3
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-PPDIF3.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit AU132, internal->external for field WMWST
CALL FUNCTION 'CONVERSION_EXIT_AU132_OUTPUT'
  EXPORTING
    input =                      WA_FGL_INDEX_TABLE_FIELDS-WMWST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FGL_INDEX_TABLE_FIELDS-WMWST.
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_FGL_INDEX_TABLE_FIELDS_STR, 
BDIF2 TYPE STRING,
BDIF3 TYPE STRING,
BDIFF TYPE STRING,
CCBTC TYPE STRING,
DABRZ TYPE STRING,
FKONT TYPE STRING,
IMKEY TYPE STRING,
INTRENO TYPE STRING,
MWST2 TYPE STRING,
MWST3 TYPE STRING,
MWSTS TYPE STRING,
PPDIF2 TYPE STRING,
PPDIF3 TYPE STRING,
PPDIFF TYPE STRING,
PRODPER TYPE STRING,
PROJN TYPE STRING,
QSSKZ TYPE STRING,
RFZEI TYPE STRING,
UZAWE TYPE STRING,
WMWST TYPE STRING,
WVERW TYPE STRING,
XOPVW TYPE STRING,
ZFBDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FGL_INDEX_TABLE_FIELDS_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_FGL_INDEX_TABLE_FIELDS_STR-BDIF2 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-BDIF3 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-BDIFF sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-CCBTC sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-DABRZ sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-FKONT sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-IMKEY sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-INTRENO sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-MWST2 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-MWST3 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-MWSTS sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-PPDIF2 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-PPDIF3 sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-PPDIFF sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-PRODPER sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-PROJN sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-QSSKZ sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-RFZEI sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-UZAWE sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-WMWST sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-WVERW sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-XOPVW sy-vline 
WA_FGL_INDEX_TABLE_FIELDS_STR-ZFBDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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