ABAP Select data from SAP table FLB04 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FLB04 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 FLB04. 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 FLB04 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_FLB04 TYPE STANDARD TABLE OF FLB04,
      WA_FLB04 TYPE FLB04,
      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: <FLB04> TYPE FLB04.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FLB04.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FLB04
  INTO TABLE IT_FLB04.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FLB04
*  INTO TABLE @DATA(IT_FLB042).
*--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_FLB04 INDEX 1 INTO DATA(WA_FLB042).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FLB04 ASSIGNING <FLB04>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FLB04>-OR001 = 1.
<FLB04>-OR002 = 1.
<FLB04>-OR003 = 1.
<FLB04>-OR004 = 1.
<FLB04>-OR005 = 1.

ENDLOOP.

LOOP AT IT_FLB04 INTO WA_FLB04.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FLB04-OR006, sy-vline,
  WA_FLB04-OR007, sy-vline,
  WA_FLB04-OR008, sy-vline,
  WA_FLB04-OR009, sy-vline,
  WA_FLB04-OR010, sy-vline,
  WA_FLB04-OR011, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FLB04 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_FLB04 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_FLB04 INTO WA_FLB04.


*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_FLB04_STR, 
OR001 TYPE STRING,
OR002 TYPE STRING,
OR003 TYPE STRING,
OR004 TYPE STRING,
OR005 TYPE STRING,
OR006 TYPE STRING,
OR007 TYPE STRING,
OR008 TYPE STRING,
OR009 TYPE STRING,
OR010 TYPE STRING,
OR011 TYPE STRING,
OR012 TYPE STRING,
OR013 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FLB04_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_FLB04_STR-OR001 sy-vline 
WA_FLB04_STR-OR002 sy-vline 
WA_FLB04_STR-OR003 sy-vline 
WA_FLB04_STR-OR004 sy-vline 
WA_FLB04_STR-OR005 sy-vline 
WA_FLB04_STR-OR006 sy-vline 
WA_FLB04_STR-OR007 sy-vline 
WA_FLB04_STR-OR008 sy-vline 
WA_FLB04_STR-OR009 sy-vline 
WA_FLB04_STR-OR010 sy-vline 
WA_FLB04_STR-OR011 sy-vline 
WA_FLB04_STR-OR012 sy-vline 
WA_FLB04_STR-OR013 sy-vline      INTO ld_text SEPARATED BY SPACE.

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