ABAP Select data from SAP table TDS_BILLDUE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_BILLDUE
*  INTO TABLE @DATA(IT_TDS_BILLDUE2).
*--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_TDS_BILLDUE INDEX 1 INTO DATA(WA_TDS_BILLDUE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_BILLDUE>-FKTYP = 1.
<TDS_BILLDUE>-VKORG = 1.
<TDS_BILLDUE>-FKDAT = 1.
<TDS_BILLDUE>-KUNNR = 1.
<TDS_BILLDUE>-FKART = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_BILLDUE-LLAND, sy-vline,
  WA_TDS_BILLDUE-VBELN, sy-vline,
  WA_TDS_BILLDUE-VTWEG, sy-vline,
  WA_TDS_BILLDUE-SPART, sy-vline,
  WA_TDS_BILLDUE-VBTYP, sy-vline,
  WA_TDS_BILLDUE-ADRNR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_BILLDUE 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_TDS_BILLDUE 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_TDS_BILLDUE INTO WA_TDS_BILLDUE.


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

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

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

*Conversion exit ALPHA, internal->external for field SAMMG
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_BILLDUE-SAMMG
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_BILLDUE-SAMMG.
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_TDS_BILLDUE_STR, 
FKTYP TYPE STRING,
VKORG TYPE STRING,
FKDAT TYPE STRING,
KUNNR TYPE STRING,
FKART TYPE STRING,
LLAND TYPE STRING,
VBELN TYPE STRING,
VTWEG TYPE STRING,
SPART TYPE STRING,
VBTYP TYPE STRING,
ADRNR TYPE STRING,
NAME1 TYPE STRING,
ORT01 TYPE STRING,
SORTKRI TYPE STRING,
KZPOS TYPE STRING,
ZAEHL TYPE STRING,
VSTEL TYPE STRING,
PDSTK TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
V_FKDAT TYPE STRING,
V_FKART TYPE STRING,
STATF TYPE STRING,
SAMMG TYPE STRING,
TEXT_FKTYP TYPE STRING,
TEXT_VKORG TYPE STRING,
TEXT_FKART TYPE STRING,
TEXT_LLAND TYPE STRING,
TEXT_VTWEG TYPE STRING,
TEXT_SPART TYPE STRING,
TEXT_VBTYP TYPE STRING,
TEXT_STRAS TYPE STRING,
TEXT_VSTEL TYPE STRING,
TEXT_WAERK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_BILLDUE_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_TDS_BILLDUE_STR-FKTYP sy-vline 
WA_TDS_BILLDUE_STR-VKORG sy-vline 
WA_TDS_BILLDUE_STR-FKDAT sy-vline 
WA_TDS_BILLDUE_STR-KUNNR sy-vline 
WA_TDS_BILLDUE_STR-FKART sy-vline 
WA_TDS_BILLDUE_STR-LLAND sy-vline 
WA_TDS_BILLDUE_STR-VBELN sy-vline 
WA_TDS_BILLDUE_STR-VTWEG sy-vline 
WA_TDS_BILLDUE_STR-SPART sy-vline 
WA_TDS_BILLDUE_STR-VBTYP sy-vline 
WA_TDS_BILLDUE_STR-ADRNR sy-vline 
WA_TDS_BILLDUE_STR-NAME1 sy-vline 
WA_TDS_BILLDUE_STR-ORT01 sy-vline 
WA_TDS_BILLDUE_STR-SORTKRI sy-vline 
WA_TDS_BILLDUE_STR-KZPOS sy-vline 
WA_TDS_BILLDUE_STR-ZAEHL sy-vline 
WA_TDS_BILLDUE_STR-VSTEL sy-vline 
WA_TDS_BILLDUE_STR-PDSTK sy-vline 
WA_TDS_BILLDUE_STR-NETWR sy-vline 
WA_TDS_BILLDUE_STR-WAERK sy-vline 
WA_TDS_BILLDUE_STR-V_FKDAT sy-vline 
WA_TDS_BILLDUE_STR-V_FKART sy-vline 
WA_TDS_BILLDUE_STR-STATF sy-vline 
WA_TDS_BILLDUE_STR-SAMMG sy-vline 
WA_TDS_BILLDUE_STR-TEXT_FKTYP sy-vline 
WA_TDS_BILLDUE_STR-TEXT_VKORG sy-vline 
WA_TDS_BILLDUE_STR-TEXT_FKART sy-vline 
WA_TDS_BILLDUE_STR-TEXT_LLAND sy-vline 
WA_TDS_BILLDUE_STR-TEXT_VTWEG sy-vline 
WA_TDS_BILLDUE_STR-TEXT_SPART sy-vline 
WA_TDS_BILLDUE_STR-TEXT_VBTYP sy-vline 
WA_TDS_BILLDUE_STR-TEXT_STRAS sy-vline 
WA_TDS_BILLDUE_STR-TEXT_VSTEL sy-vline 
WA_TDS_BILLDUE_STR-TEXT_WAERK sy-vline      INTO ld_text SEPARATED BY SPACE.

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