ABAP Select data from SAP table T681Y into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T681Y 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 T681Y. 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 T681Y 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_T681Y TYPE STANDARD TABLE OF T681Y,
      WA_T681Y TYPE T681Y,
      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: <T681Y> TYPE T681Y.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T681Y.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T681Y
  INTO TABLE IT_T681Y.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T681Y
*  INTO TABLE @DATA(IT_T681Y2).
*--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_T681Y INDEX 1 INTO DATA(WA_T681Y2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T681Y ASSIGNING <T681Y>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T681Y>-KVEWE = 1.
<T681Y>-KONLI = 1.
<T681Y>-KOSTAFF = 1.
<T681Y>-KOGUELT = 1.
<T681Y>-KOVAR = 1.

ENDLOOP.

LOOP AT IT_T681Y INTO WA_T681Y.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T681Y-GNDAT, sy-vline,
  WA_T681Y-GNZEI, sy-vline,
  WA_T681Y-SAPSY, sy-vline,
  WA_T681Y-SYSID, sy-vline,
  WA_T681Y-SAPRL, sy-vline,
  WA_T681Y-KOKONPF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T681Y 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_T681Y 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_T681Y INTO WA_T681Y.


*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_T681Y_STR, 
KVEWE TYPE STRING,
KONLI TYPE STRING,
KOSTAFF TYPE STRING,
KOGUELT TYPE STRING,
KOVAR TYPE STRING,
GNDAT TYPE STRING,
GNZEI TYPE STRING,
SAPSY TYPE STRING,
SYSID TYPE STRING,
SAPRL TYPE STRING,
KOKONPF TYPE STRING,
KODELFL TYPE STRING,
KOEXCL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T681Y_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_T681Y_STR-KVEWE sy-vline 
WA_T681Y_STR-KONLI sy-vline 
WA_T681Y_STR-KOSTAFF sy-vline 
WA_T681Y_STR-KOGUELT sy-vline 
WA_T681Y_STR-KOVAR sy-vline 
WA_T681Y_STR-GNDAT sy-vline 
WA_T681Y_STR-GNZEI sy-vline 
WA_T681Y_STR-SAPSY sy-vline 
WA_T681Y_STR-SYSID sy-vline 
WA_T681Y_STR-SAPRL sy-vline 
WA_T681Y_STR-KOKONPF sy-vline 
WA_T681Y_STR-KODELFL sy-vline 
WA_T681Y_STR-KOEXCL sy-vline      INTO ld_text SEPARATED BY SPACE.

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