ABAP Select data from SAP table TNWCH_EDIKTR_EO into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNWCH_EDIKTR_EO
*  INTO TABLE @DATA(IT_TNWCH_EDIKTR_EO2).
*--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_TNWCH_EDIKTR_EO INDEX 1 INTO DATA(WA_TNWCH_EDIKTR_EO2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TNWCH_EDIKTR_EO>-MANDT = 1.
<TNWCH_EDIKTR_EO>-EINRI = 1.
<TNWCH_EDIKTR_EO>-KTART = 1.
<TNWCH_EDIKTR_EO>-KOSTR = 1.
<TNWCH_EDIKTR_EO>-BEGDT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNWCH_EDIKTR_EO-ENDDT, sy-vline,
  WA_TNWCH_EDIKTR_EO-EDI, sy-vline,
  WA_TNWCH_EDIKTR_EO-PROD, sy-vline,
  WA_TNWCH_EDIKTR_EO-DRUCK, sy-vline,
  WA_TNWCH_EDIKTR_EO-NULLR, sy-vline,
  WA_TNWCH_EDIKTR_EO-DAS301, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TNWCH_EDIKTR_EO 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_TNWCH_EDIKTR_EO 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_TNWCH_EDIKTR_EO INTO WA_TNWCH_EDIKTR_EO.


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

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

*Conversion exit ALPHA, internal->external for field KOSTR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNWCH_EDIKTR_EO-KOSTR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNWCH_EDIKTR_EO-KOSTR.
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_TNWCH_EDIKTR_EO_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
KTART TYPE STRING,
KOSTR TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
EDI TYPE STRING,
PROD TYPE STRING,
DRUCK TYPE STRING,
NULLR TYPE STRING,
DAS301 TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
ERTIM TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
UPTIM TYPE STRING,
XMLIN_VERSION TYPE STRING,
XMLIN_OPTIONEN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TNWCH_EDIKTR_EO_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_TNWCH_EDIKTR_EO_STR-MANDT sy-vline 
WA_TNWCH_EDIKTR_EO_STR-EINRI sy-vline 
WA_TNWCH_EDIKTR_EO_STR-KTART sy-vline 
WA_TNWCH_EDIKTR_EO_STR-KOSTR sy-vline 
WA_TNWCH_EDIKTR_EO_STR-BEGDT sy-vline 
WA_TNWCH_EDIKTR_EO_STR-ENDDT sy-vline 
WA_TNWCH_EDIKTR_EO_STR-EDI sy-vline 
WA_TNWCH_EDIKTR_EO_STR-PROD sy-vline 
WA_TNWCH_EDIKTR_EO_STR-DRUCK sy-vline 
WA_TNWCH_EDIKTR_EO_STR-NULLR sy-vline 
WA_TNWCH_EDIKTR_EO_STR-DAS301 sy-vline 
WA_TNWCH_EDIKTR_EO_STR-ERDAT sy-vline 
WA_TNWCH_EDIKTR_EO_STR-ERUSR sy-vline 
WA_TNWCH_EDIKTR_EO_STR-ERTIM sy-vline 
WA_TNWCH_EDIKTR_EO_STR-UPDAT sy-vline 
WA_TNWCH_EDIKTR_EO_STR-UPUSR sy-vline 
WA_TNWCH_EDIKTR_EO_STR-UPTIM sy-vline 
WA_TNWCH_EDIKTR_EO_STR-XMLIN_VERSION sy-vline 
WA_TNWCH_EDIKTR_EO_STR-XMLIN_OPTIONEN sy-vline      INTO ld_text SEPARATED BY SPACE.

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