ABAP Select data from SAP table FAGLV_ITXB_ASSGN into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FAGLV_ITXB_ASSGN
*  INTO TABLE @DATA(IT_FAGLV_ITXB_ASSGN2).
*--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_FAGLV_ITXB_ASSGN INDEX 1 INTO DATA(WA_FAGLV_ITXB_ASSGN2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FAGLV_ITXB_ASSGN>-MANDT = 1.
<FAGLV_ITXB_ASSGN>-BUKRS = 1.
<FAGLV_ITXB_ASSGN>-ITAXBUPLA = 1.
<FAGLV_ITXB_ASSGN>-RBUSA = 1.
<FAGLV_ITXB_ASSGN>-PRCTR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FAGLV_ITXB_ASSGN-SEGMENT, sy-vline,
  WA_FAGLV_ITXB_ASSGN-FROMPERIOD, sy-vline,
  WA_FAGLV_ITXB_ASSGN-FROMYEAR, sy-vline,
  WA_FAGLV_ITXB_ASSGN-TOPERIOD, sy-vline,
  WA_FAGLV_ITXB_ASSGN-TOYEAR, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_FAGLV_ITXB_ASSGN 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_FAGLV_ITXB_ASSGN 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_FAGLV_ITXB_ASSGN INTO WA_FAGLV_ITXB_ASSGN.


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

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

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

*Conversion exit GJAHR, internal->external for field TOYEAR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_FAGLV_ITXB_ASSGN-TOYEAR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FAGLV_ITXB_ASSGN-TOYEAR.
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_FAGLV_ITXB_ASSGN_STR, 
MANDT TYPE STRING,
BUKRS TYPE STRING,
ITAXBUPLA TYPE STRING,
RBUSA TYPE STRING,
PRCTR TYPE STRING,
SEGMENT TYPE STRING,
FROMPERIOD TYPE STRING,
FROMYEAR TYPE STRING,
TOPERIOD TYPE STRING,
TOYEAR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FAGLV_ITXB_ASSGN_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_FAGLV_ITXB_ASSGN_STR-MANDT sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-BUKRS sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-ITAXBUPLA sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-RBUSA sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-PRCTR sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-SEGMENT sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-FROMPERIOD sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-FROMYEAR sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-TOPERIOD sy-vline 
WA_FAGLV_ITXB_ASSGN_STR-TOYEAR sy-vline      INTO ld_text SEPARATED BY SPACE.

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