ABAP Select data from SAP table LVC_S_FCEX into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM LVC_S_FCEX
*  INTO TABLE @DATA(IT_LVC_S_FCEX2).
*--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_LVC_S_FCEX INDEX 1 INTO DATA(WA_LVC_S_FCEX2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<LVC_S_FCEX>-CONT = 1.
<LVC_S_FCEX>-BACK = 1.
<LVC_S_FCEX>-XEXIT = 1.
<LVC_S_FCEX>-CANC = 1.
<LVC_S_FCEX>-FILTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_LVC_S_FCEX-SORT_UP, sy-vline,
  WA_LVC_S_FCEX-SORT_DOWN, sy-vline,
  WA_LVC_S_FCEX-ZSUM, sy-vline,
  WA_LVC_S_FCEX-XSUM, sy-vline,
  WA_LVC_S_FCEX-LAY_DISP, sy-vline,
  WA_LVC_S_FCEX-LAY_CHOOSE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_LVC_S_FCEX 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_LVC_S_FCEX 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_LVC_S_FCEX INTO WA_LVC_S_FCEX.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_LVC_S_FCEX_STR, 
CONT TYPE STRING,
BACK TYPE STRING,
XEXIT TYPE STRING,
CANC TYPE STRING,
FILTER TYPE STRING,
SORT_UP TYPE STRING,
SORT_DOWN TYPE STRING,
ZSUM TYPE STRING,
XSUM TYPE STRING,
LAY_DISP TYPE STRING,
LAY_CHOOSE TYPE STRING,
LAY_SAVE TYPE STRING,
LAY_MODIFY TYPE STRING,
XPRINT TYPE STRING,
PRINT_PRVW TYPE STRING,
HELP TYPE STRING,
INFO TYPE STRING,
SEARCH TYPE STRING,
SEARCH_M TYPE STRING,
SCROLL_TOP TYPE STRING,
SCROLL_BOT TYPE STRING,
SCROLL_UP TYPE STRING,
SCROLL_DWN TYPE STRING,
PICK TYPE STRING,
XSAVE TYPE STRING,
PROTOCOL TYPE STRING,
ERROR_PROT TYPE STRING,
TEXT_PROC TYPE STRING,
TABLE_CALC TYPE STRING,
ABC_ANALYS TYPE STRING,
MAIL TYPE STRING,
MARK_ALL TYPE STRING,
UNMARK_ALL TYPE STRING,
SCR_BEGIN TYPE STRING,
SCR_END TYPE STRING,
SCR_LEFT TYPE STRING,
SCR_RIGHT TYPE STRING,
DSP_KEYINF TYPE STRING,
DSP_FCAT TYPE STRING,
DSP_LAYOUT TYPE STRING,
DSP_SORT TYPE STRING,
DSP_FILTER TYPE STRING,
DSP_EVENTS TYPE STRING,
DSP_MSGS TYPE STRING,
DSP_VARI TYPE STRING,
DSP_SGRP TYPE STRING,
DSP_OUTT TYPE STRING,
LONGTEXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_LVC_S_FCEX_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_LVC_S_FCEX_STR-CONT sy-vline 
WA_LVC_S_FCEX_STR-BACK sy-vline 
WA_LVC_S_FCEX_STR-XEXIT sy-vline 
WA_LVC_S_FCEX_STR-CANC sy-vline 
WA_LVC_S_FCEX_STR-FILTER sy-vline 
WA_LVC_S_FCEX_STR-SORT_UP sy-vline 
WA_LVC_S_FCEX_STR-SORT_DOWN sy-vline 
WA_LVC_S_FCEX_STR-ZSUM sy-vline 
WA_LVC_S_FCEX_STR-XSUM sy-vline 
WA_LVC_S_FCEX_STR-LAY_DISP sy-vline 
WA_LVC_S_FCEX_STR-LAY_CHOOSE sy-vline 
WA_LVC_S_FCEX_STR-LAY_SAVE sy-vline 
WA_LVC_S_FCEX_STR-LAY_MODIFY sy-vline 
WA_LVC_S_FCEX_STR-XPRINT sy-vline 
WA_LVC_S_FCEX_STR-PRINT_PRVW sy-vline 
WA_LVC_S_FCEX_STR-HELP sy-vline 
WA_LVC_S_FCEX_STR-INFO sy-vline 
WA_LVC_S_FCEX_STR-SEARCH sy-vline 
WA_LVC_S_FCEX_STR-SEARCH_M sy-vline 
WA_LVC_S_FCEX_STR-SCROLL_TOP sy-vline 
WA_LVC_S_FCEX_STR-SCROLL_BOT sy-vline 
WA_LVC_S_FCEX_STR-SCROLL_UP sy-vline 
WA_LVC_S_FCEX_STR-SCROLL_DWN sy-vline 
WA_LVC_S_FCEX_STR-PICK sy-vline 
WA_LVC_S_FCEX_STR-XSAVE sy-vline 
WA_LVC_S_FCEX_STR-PROTOCOL sy-vline 
WA_LVC_S_FCEX_STR-ERROR_PROT sy-vline 
WA_LVC_S_FCEX_STR-TEXT_PROC sy-vline 
WA_LVC_S_FCEX_STR-TABLE_CALC sy-vline 
WA_LVC_S_FCEX_STR-ABC_ANALYS sy-vline 
WA_LVC_S_FCEX_STR-MAIL sy-vline 
WA_LVC_S_FCEX_STR-MARK_ALL sy-vline 
WA_LVC_S_FCEX_STR-UNMARK_ALL sy-vline 
WA_LVC_S_FCEX_STR-SCR_BEGIN sy-vline 
WA_LVC_S_FCEX_STR-SCR_END sy-vline 
WA_LVC_S_FCEX_STR-SCR_LEFT sy-vline 
WA_LVC_S_FCEX_STR-SCR_RIGHT sy-vline 
WA_LVC_S_FCEX_STR-DSP_KEYINF sy-vline 
WA_LVC_S_FCEX_STR-DSP_FCAT sy-vline 
WA_LVC_S_FCEX_STR-DSP_LAYOUT sy-vline 
WA_LVC_S_FCEX_STR-DSP_SORT sy-vline 
WA_LVC_S_FCEX_STR-DSP_FILTER sy-vline 
WA_LVC_S_FCEX_STR-DSP_EVENTS sy-vline 
WA_LVC_S_FCEX_STR-DSP_MSGS sy-vline 
WA_LVC_S_FCEX_STR-DSP_VARI sy-vline 
WA_LVC_S_FCEX_STR-DSP_SGRP sy-vline 
WA_LVC_S_FCEX_STR-DSP_OUTT sy-vline 
WA_LVC_S_FCEX_STR-LONGTEXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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