ABAP Select data from SAP table TNWAT_EDI_VERTR into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TNWAT_EDI_VERTR
*  INTO TABLE @DATA(IT_TNWAT_EDI_VERTR2).
*--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_TNWAT_EDI_VERTR INDEX 1 INTO DATA(WA_TNWAT_EDI_VERTR2).


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

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

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TNWAT_EDI_VERTR-VBNR, sy-vline,
  WA_TNWAT_EDI_VERTR-TARID, sy-vline,
  WA_TNWAT_EDI_VERTR-ZOTYP, sy-vline,
  WA_TNWAT_EDI_VERTR-OPTARID, sy-vline,
  WA_TNWAT_EDI_VERTR-OPZOTYP, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_TNWAT_EDI_VERTR 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_TNWAT_EDI_VERTR 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_TNWAT_EDI_VERTR INTO WA_TNWAT_EDI_VERTR.


*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_TNWAT_EDI_VERTR-EINRI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNWAT_EDI_VERTR-EINRI.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

*Conversion exit ALPHA, internal->external for field OPZOTYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TNWAT_EDI_VERTR-OPZOTYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TNWAT_EDI_VERTR-OPZOTYP.
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_TNWAT_EDI_VERTR_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
KOSTR TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
VBNR TYPE STRING,
TARID TYPE STRING,
ZOTYP TYPE STRING,
OPTARID TYPE STRING,
OPZOTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TNWAT_EDI_VERTR_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_TNWAT_EDI_VERTR_STR-MANDT sy-vline 
WA_TNWAT_EDI_VERTR_STR-EINRI sy-vline 
WA_TNWAT_EDI_VERTR_STR-KOSTR sy-vline 
WA_TNWAT_EDI_VERTR_STR-BEGDT sy-vline 
WA_TNWAT_EDI_VERTR_STR-ENDDT sy-vline 
WA_TNWAT_EDI_VERTR_STR-VBNR sy-vline 
WA_TNWAT_EDI_VERTR_STR-TARID sy-vline 
WA_TNWAT_EDI_VERTR_STR-ZOTYP sy-vline 
WA_TNWAT_EDI_VERTR_STR-OPTARID sy-vline 
WA_TNWAT_EDI_VERTR_STR-OPZOTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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