ABAP Select data from SAP table FC00LSTGEN into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FC00LSTGEN 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 FC00LSTGEN. 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 FC00LSTGEN 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_FC00LSTGEN TYPE STANDARD TABLE OF FC00LSTGEN,
      WA_FC00LSTGEN TYPE FC00LSTGEN,
      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: <FC00LSTGEN> TYPE FC00LSTGEN.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FC00LSTGEN.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FC00LSTGEN
  INTO TABLE IT_FC00LSTGEN.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FC00LSTGEN
*  INTO TABLE @DATA(IT_FC00LSTGEN2).
*--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_FC00LSTGEN INDEX 1 INTO DATA(WA_FC00LSTGEN2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FC00LSTGEN ASSIGNING <FC00LSTGEN>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FC00LSTGEN>-MANDT = 1.
<FC00LSTGEN>-DIMEN = 1.
<FC00LSTGEN>-CONGR = 1.
<FC00LSTGEN>-BUNIT = 1.
<FC00LSTGEN>-ITCLG = 1.

ENDLOOP.

LOOP AT IT_FC00LSTGEN INTO WA_FC00LSTGEN.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FC00LSTGEN-ITEM, sy-vline,
  WA_FC00LSTGEN-SITYP, sy-vline,
  WA_FC00LSTGEN-SUBIT, sy-vline,
  WA_FC00LSTGEN-RBUPTR, sy-vline,
  WA_FC00LSTGEN-CGLVL, sy-vline,
  WA_FC00LSTGEN-COICU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FC00LSTGEN 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_FC00LSTGEN 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_FC00LSTGEN INTO WA_FC00LSTGEN.


*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 AFIMC, internal->external for field CONGR
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-CONGR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-CONGR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field BUNIT
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-BUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-BUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BFIMC, internal->external for field ITEM
CALL FUNCTION 'CONVERSION_EXIT_BFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-ITEM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-ITEM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field RBUPTR
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-RBUPTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-RBUPTR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field CGLVL
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-CGLVL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-CGLVL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit AFIMC, internal->external for field COICU
CALL FUNCTION 'CONVERSION_EXIT_AFIMC_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-COICU
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-COICU.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field RVERS
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-RVERS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-RVERS.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field RYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-RYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-RYEAR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field RUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-RUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-RUNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field DOCNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_FC00LSTGEN-DOCNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FC00LSTGEN-DOCNR.
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_FC00LSTGEN_STR, 
MANDT TYPE STRING,
DIMEN TYPE STRING,
CONGR TYPE STRING,
BUNIT TYPE STRING,
ITCLG TYPE STRING,
ITEM TYPE STRING,
SITYP TYPE STRING,
SUBIT TYPE STRING,
RBUPTR TYPE STRING,
CGLVL TYPE STRING,
COICU TYPE STRING,
RVERS TYPE STRING,
RYEAR TYPE STRING,
PERID TYPE STRING,
RTCUR TYPE STRING,
RUNIT TYPE STRING,
PLEVL TYPE STRING,
BLEVL TYPE STRING,
RPFLG TYPE STRING,
RTFLG TYPE STRING,
DOCTY TYPE STRING,
DOCNR TYPE STRING,
RRCTY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FC00LSTGEN_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_FC00LSTGEN_STR-MANDT sy-vline 
WA_FC00LSTGEN_STR-DIMEN sy-vline 
WA_FC00LSTGEN_STR-CONGR sy-vline 
WA_FC00LSTGEN_STR-BUNIT sy-vline 
WA_FC00LSTGEN_STR-ITCLG sy-vline 
WA_FC00LSTGEN_STR-ITEM sy-vline 
WA_FC00LSTGEN_STR-SITYP sy-vline 
WA_FC00LSTGEN_STR-SUBIT sy-vline 
WA_FC00LSTGEN_STR-RBUPTR sy-vline 
WA_FC00LSTGEN_STR-CGLVL sy-vline 
WA_FC00LSTGEN_STR-COICU sy-vline 
WA_FC00LSTGEN_STR-RVERS sy-vline 
WA_FC00LSTGEN_STR-RYEAR sy-vline 
WA_FC00LSTGEN_STR-PERID sy-vline 
WA_FC00LSTGEN_STR-RTCUR sy-vline 
WA_FC00LSTGEN_STR-RUNIT sy-vline 
WA_FC00LSTGEN_STR-PLEVL sy-vline 
WA_FC00LSTGEN_STR-BLEVL sy-vline 
WA_FC00LSTGEN_STR-RPFLG sy-vline 
WA_FC00LSTGEN_STR-RTFLG sy-vline 
WA_FC00LSTGEN_STR-DOCTY sy-vline 
WA_FC00LSTGEN_STR-DOCNR sy-vline 
WA_FC00LSTGEN_STR-RRCTY sy-vline      INTO ld_text SEPARATED BY SPACE.

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