ABAP Select data from SAP table V_512W_T into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP V_512W_T 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 V_512W_T. 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 V_512W_T 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_V_512W_T TYPE STANDARD TABLE OF V_512W_T,
      WA_V_512W_T TYPE V_512W_T,
      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: <V_512W_T> TYPE V_512W_T.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_V_512W_T.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM V_512W_T
  INTO TABLE IT_V_512W_T.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM V_512W_T
*  INTO TABLE @DATA(IT_V_512W_T2).
*--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_V_512W_T INDEX 1 INTO DATA(WA_V_512W_T2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_V_512W_T ASSIGNING <V_512W_T>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<V_512W_T>-MANDT = 1.
<V_512W_T>-MOLGA = 1.
<V_512W_T>-LGART = 1.
<V_512W_T>-ENDDA = 1.
<V_512W_T>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_V_512W_T INTO WA_V_512W_T.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_V_512W_T-GVBLA, sy-vline,
  WA_V_512W_T-GVALA, sy-vline,
  WA_V_512W_T-GVPRO, sy-vline,
  WA_V_512W_T-PZBLA, sy-vline,
  WA_V_512W_T-PZALA, sy-vline,
  WA_V_512W_T-PZPRO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_V_512W_T 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_V_512W_T 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_V_512W_T INTO WA_V_512W_T.


*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_V_512W_T_STR, 
MANDT TYPE STRING,
MOLGA TYPE STRING,
LGART TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
GVBLA TYPE STRING,
GVALA TYPE STRING,
GVPRO TYPE STRING,
PZBLA TYPE STRING,
PZALA TYPE STRING,
PZPRO TYPE STRING,
FZBLA TYPE STRING,
FZALA TYPE STRING,
FZPRO TYPE STRING,
VKLAS TYPE STRING,
KUMUL TYPE STRING,
D1AUS TYPE STRING,
D1KUM TYPE STRING,
D1PRO TYPE STRING,
D2AUS TYPE STRING,
D2KUM TYPE STRING,
D2PRO TYPE STRING,
D3AUS TYPE STRING,
D3KUM TYPE STRING,
D3PRO TYPE STRING,
D4AUS TYPE STRING,
D4KUM TYPE STRING,
D4PRO TYPE STRING,
D5AUS TYPE STRING,
D5KUM TYPE STRING,
D5PRO TYPE STRING,
AKLAS TYPE STRING,
LGTXT TYPE STRING,
KZTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_V_512W_T_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_V_512W_T_STR-MANDT sy-vline 
WA_V_512W_T_STR-MOLGA sy-vline 
WA_V_512W_T_STR-LGART sy-vline 
WA_V_512W_T_STR-ENDDA sy-vline 
WA_V_512W_T_STR-BEGDA sy-vline 
WA_V_512W_T_STR-GVBLA sy-vline 
WA_V_512W_T_STR-GVALA sy-vline 
WA_V_512W_T_STR-GVPRO sy-vline 
WA_V_512W_T_STR-PZBLA sy-vline 
WA_V_512W_T_STR-PZALA sy-vline 
WA_V_512W_T_STR-PZPRO sy-vline 
WA_V_512W_T_STR-FZBLA sy-vline 
WA_V_512W_T_STR-FZALA sy-vline 
WA_V_512W_T_STR-FZPRO sy-vline 
WA_V_512W_T_STR-VKLAS sy-vline 
WA_V_512W_T_STR-KUMUL sy-vline 
WA_V_512W_T_STR-D1AUS sy-vline 
WA_V_512W_T_STR-D1KUM sy-vline 
WA_V_512W_T_STR-D1PRO sy-vline 
WA_V_512W_T_STR-D2AUS sy-vline 
WA_V_512W_T_STR-D2KUM sy-vline 
WA_V_512W_T_STR-D2PRO sy-vline 
WA_V_512W_T_STR-D3AUS sy-vline 
WA_V_512W_T_STR-D3KUM sy-vline 
WA_V_512W_T_STR-D3PRO sy-vline 
WA_V_512W_T_STR-D4AUS sy-vline 
WA_V_512W_T_STR-D4KUM sy-vline 
WA_V_512W_T_STR-D4PRO sy-vline 
WA_V_512W_T_STR-D5AUS sy-vline 
WA_V_512W_T_STR-D5KUM sy-vline 
WA_V_512W_T_STR-D5PRO sy-vline 
WA_V_512W_T_STR-AKLAS sy-vline 
WA_V_512W_T_STR-LGTXT sy-vline 
WA_V_512W_T_STR-KZTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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