ABAP Select data from SAP table T7TW2I into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP T7TW2I 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 T7TW2I. 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 T7TW2I 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_T7TW2I TYPE STANDARD TABLE OF T7TW2I,
      WA_T7TW2I TYPE T7TW2I,
      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: <T7TW2I> TYPE T7TW2I.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_T7TW2I.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM T7TW2I
  INTO TABLE IT_T7TW2I.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM T7TW2I
*  INTO TABLE @DATA(IT_T7TW2I2).
*--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_T7TW2I INDEX 1 INTO DATA(WA_T7TW2I2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_T7TW2I ASSIGNING <T7TW2I>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<T7TW2I>-MANDT = 1.
<T7TW2I>-PERNR = 1.
<T7TW2I>-BEGDA1 = 1.
<T7TW2I>-ENDDA1 = 1.
<T7TW2I>-TFORM = 1.

ENDLOOP.

LOOP AT IT_T7TW2I INTO WA_T7TW2I.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_T7TW2I-ENTXM, sy-vline,
  WA_T7TW2I-BUKRS, sy-vline,
  WA_T7TW2I-WERKS, sy-vline,
  WA_T7TW2I-PERSG, sy-vline,
  WA_T7TW2I-PERSK, sy-vline,
  WA_T7TW2I-BTRTL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_T7TW2I 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_T7TW2I 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_T7TW2I INTO WA_T7TW2I.


*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_T7TW2I_STR, 
MANDT TYPE STRING,
PERNR TYPE STRING,
BEGDA1 TYPE STRING,
ENDDA1 TYPE STRING,
TFORM TYPE STRING,
ENTXM TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
BTRTL TYPE STRING,
ENTBD TYPE STRING,
ENTID TYPE STRING,
ENTAU TYPE STRING,
TAXID TYPE STRING,
IDTYP TYPE STRING,
EENUM TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
ADDRESS TYPE STRING,
TXPCT TYPE STRING,
GROSS TYPE STRING,
TAX TYPE STRING,
NET TYPE STRING,
COMPANY_NAME TYPE STRING,
COMPANY_ADDRESS TYPE STRING,
TWHDR TYPE STRING,
NAME TYPE STRING,
OVCHK TYPE STRING,
ADDTY TYPE STRING,
NATIO TYPE STRING,
ICNUM TYPE STRING,
STAT2 TYPE STRING,
ORGEH TYPE STRING,
INDVD TYPE STRING,
DMSTC TYPE STRING,
PENSION_AMOUNT TYPE STRING,
REMAK TYPE STRING,
HALFY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_T7TW2I_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_T7TW2I_STR-MANDT sy-vline 
WA_T7TW2I_STR-PERNR sy-vline 
WA_T7TW2I_STR-BEGDA1 sy-vline 
WA_T7TW2I_STR-ENDDA1 sy-vline 
WA_T7TW2I_STR-TFORM sy-vline 
WA_T7TW2I_STR-ENTXM sy-vline 
WA_T7TW2I_STR-BUKRS sy-vline 
WA_T7TW2I_STR-WERKS sy-vline 
WA_T7TW2I_STR-PERSG sy-vline 
WA_T7TW2I_STR-PERSK sy-vline 
WA_T7TW2I_STR-BTRTL sy-vline 
WA_T7TW2I_STR-ENTBD sy-vline 
WA_T7TW2I_STR-ENTID sy-vline 
WA_T7TW2I_STR-ENTAU sy-vline 
WA_T7TW2I_STR-TAXID sy-vline 
WA_T7TW2I_STR-IDTYP sy-vline 
WA_T7TW2I_STR-EENUM sy-vline 
WA_T7TW2I_STR-NACHN sy-vline 
WA_T7TW2I_STR-VORNA sy-vline 
WA_T7TW2I_STR-ADDRESS sy-vline 
WA_T7TW2I_STR-TXPCT sy-vline 
WA_T7TW2I_STR-GROSS sy-vline 
WA_T7TW2I_STR-TAX sy-vline 
WA_T7TW2I_STR-NET sy-vline 
WA_T7TW2I_STR-COMPANY_NAME sy-vline 
WA_T7TW2I_STR-COMPANY_ADDRESS sy-vline 
WA_T7TW2I_STR-TWHDR sy-vline 
WA_T7TW2I_STR-NAME sy-vline 
WA_T7TW2I_STR-OVCHK sy-vline 
WA_T7TW2I_STR-ADDTY sy-vline 
WA_T7TW2I_STR-NATIO sy-vline 
WA_T7TW2I_STR-ICNUM sy-vline 
WA_T7TW2I_STR-STAT2 sy-vline 
WA_T7TW2I_STR-ORGEH sy-vline 
WA_T7TW2I_STR-INDVD sy-vline 
WA_T7TW2I_STR-DMSTC sy-vline 
WA_T7TW2I_STR-PENSION_AMOUNT sy-vline 
WA_T7TW2I_STR-REMAK sy-vline 
WA_T7TW2I_STR-HALFY sy-vline      INTO ld_text SEPARATED BY SPACE.

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