ABAP Select data from SAP table V50GALV2 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP V50GALV2 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 V50GALV2. 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 V50GALV2 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_V50GALV2 TYPE STANDARD TABLE OF V50GALV2,
      WA_V50GALV2 TYPE V50GALV2,
      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: <V50GALV2> TYPE V50GALV2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V50GALV2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V50GALV2
  INTO TABLE IT_V50GALV2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V50GALV2
*  INTO TABLE @DATA(IT_V50GALV22).
*--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_V50GALV2 INDEX 1 INTO DATA(WA_V50GALV22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V50GALV2 ASSIGNING <V50GALV2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V50GALV2>-IREFBELEG = 1.
<V50GALV2>-IREFMONAT = 1.
<V50GALV2>-IREFEJAHR = 1.
<V50GALV2>-BELEGNUMR = 1.
<V50GALV2>-DATUMMONA = 1.

ENDLOOP.

LOOP AT IT_V50GALV2 INTO WA_V50GALV2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V50GALV2-DATUMJAHR, sy-vline,
  WA_V50GALV2-HAUPTPOSI, sy-vline,
  WA_V50GALV2-RECHNWEAK, sy-vline,
  WA_V50GALV2-RECHNWEEH, sy-vline,
  WA_V50GALV2-GRENZWEAK, sy-vline,
  WA_V50GALV2-GRENZWEEH, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V50GALV2 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_V50GALV2 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_V50GALV2 INTO WA_V50GALV2.


*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 IREFBELEG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-IREFBELEG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-IREFBELEG.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field IREFEJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-IREFEJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-IREFEJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BELEGNUMR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-BELEGNUMR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-BELEGNUMR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field DATUMJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-DATUMJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-DATUMJAHR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field EIGENMAEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-EIGENMAEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-EIGENMAEH.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field BESONMAEH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_V50GALV2-BESONMAEH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_V50GALV2-BESONMAEH.
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_V50GALV2_STR, 
IREFBELEG TYPE STRING,
IREFMONAT TYPE STRING,
IREFEJAHR TYPE STRING,
BELEGNUMR TYPE STRING,
DATUMMONA TYPE STRING,
DATUMJAHR TYPE STRING,
HAUPTPOSI TYPE STRING,
RECHNWEAK TYPE STRING,
RECHNWEEH TYPE STRING,
GRENZWEAK TYPE STRING,
GRENZWEEH TYPE STRING,
IFREMDWAK TYPE STRING,
IFREMDWEH TYPE STRING,
EIGENMAAK TYPE STRING,
EIGENMAEH TYPE STRING,
BESONMAAK TYPE STRING,
BESONMAEH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V50GALV2_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_V50GALV2_STR-IREFBELEG sy-vline 
WA_V50GALV2_STR-IREFMONAT sy-vline 
WA_V50GALV2_STR-IREFEJAHR sy-vline 
WA_V50GALV2_STR-BELEGNUMR sy-vline 
WA_V50GALV2_STR-DATUMMONA sy-vline 
WA_V50GALV2_STR-DATUMJAHR sy-vline 
WA_V50GALV2_STR-HAUPTPOSI sy-vline 
WA_V50GALV2_STR-RECHNWEAK sy-vline 
WA_V50GALV2_STR-RECHNWEEH sy-vline 
WA_V50GALV2_STR-GRENZWEAK sy-vline 
WA_V50GALV2_STR-GRENZWEEH sy-vline 
WA_V50GALV2_STR-IFREMDWAK sy-vline 
WA_V50GALV2_STR-IFREMDWEH sy-vline 
WA_V50GALV2_STR-EIGENMAAK sy-vline 
WA_V50GALV2_STR-EIGENMAEH sy-vline 
WA_V50GALV2_STR-BESONMAAK sy-vline 
WA_V50GALV2_STR-BESONMAEH sy-vline      INTO ld_text SEPARATED BY SPACE.

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