ABAP Select data from SAP table TDS_BILLHEAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_BILLHEAD 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_BILLHEAD. 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_BILLHEAD 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_BILLHEAD TYPE STANDARD TABLE OF TDS_BILLHEAD,
      WA_TDS_BILLHEAD TYPE TDS_BILLHEAD,
      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_BILLHEAD> TYPE TDS_BILLHEAD.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_BILLHEAD
*  INTO TABLE @DATA(IT_TDS_BILLHEAD2).
*--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_BILLHEAD INDEX 1 INTO DATA(WA_TDS_BILLHEAD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_BILLHEAD>-FKART = 1.
<TDS_BILLHEAD>-KUNAG = 1.
<TDS_BILLHEAD>-KUNRG = 1.
<TDS_BILLHEAD>-FKDAT = 1.
<TDS_BILLHEAD>-VKORG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_BILLHEAD-VTWEG, sy-vline,
  WA_TDS_BILLHEAD-FKTYP, sy-vline,
  WA_TDS_BILLHEAD-VBELN, sy-vline,
  WA_TDS_BILLHEAD-VBTYP, sy-vline,
  WA_TDS_BILLHEAD-RFBSK, sy-vline,
  WA_TDS_BILLHEAD-ERNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_BILLHEAD 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_BILLHEAD 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_BILLHEAD INTO WA_TDS_BILLHEAD.


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

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

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

*Conversion exit PARVW, internal->external for field PARVW
CALL FUNCTION 'CONVERSION_EXIT_PARVW_OUTPUT'
  EXPORTING
    input =                      WA_TDS_BILLHEAD-PARVW
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_BILLHEAD-PARVW.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field BBLNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_TDS_BILLHEAD-BBLNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_TDS_BILLHEAD-BBLNR.
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_BILLHEAD_STR, 
FKART TYPE STRING,
KUNAG TYPE STRING,
KUNRG TYPE STRING,
FKDAT TYPE STRING,
VKORG TYPE STRING,
VTWEG TYPE STRING,
FKTYP TYPE STRING,
VBELN TYPE STRING,
VBTYP TYPE STRING,
RFBSK TYPE STRING,
ERNAM TYPE STRING,
NETWR TYPE STRING,
WAERK TYPE STRING,
MWSBK TYPE STRING,
KUNAG_T TYPE STRING,
KUNRG_T TYPE STRING,
FKART_T TYPE STRING,
BUKRS TYPE STRING,
ERDAT TYPE STRING,
PAYMENT_CLEARED TYPE STRING,
VKORG_T TYPE STRING,
VTWEG_T TYPE STRING,
SPART TYPE STRING,
SPART_T TYPE STRING,
VBTYP_T TYPE STRING,
RFBSK_T TYPE STRING,
BSTNK_VF TYPE STRING,
XBLNR TYPE STRING,
ZUONR TYPE STRING,
FKSTO TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
VSBED TYPE STRING,
PARVW TYPE STRING,
PARVW_T TYPE STRING,
ZPERS_T TYPE STRING,
ZPERS TYPE STRING,
MADAT TYPE STRING,
FAEDT TYPE STRING,
BBLNR TYPE STRING,
AUGDT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_BILLHEAD_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_BILLHEAD_STR-FKART sy-vline 
WA_TDS_BILLHEAD_STR-KUNAG sy-vline 
WA_TDS_BILLHEAD_STR-KUNRG sy-vline 
WA_TDS_BILLHEAD_STR-FKDAT sy-vline 
WA_TDS_BILLHEAD_STR-VKORG sy-vline 
WA_TDS_BILLHEAD_STR-VTWEG sy-vline 
WA_TDS_BILLHEAD_STR-FKTYP sy-vline 
WA_TDS_BILLHEAD_STR-VBELN sy-vline 
WA_TDS_BILLHEAD_STR-VBTYP sy-vline 
WA_TDS_BILLHEAD_STR-RFBSK sy-vline 
WA_TDS_BILLHEAD_STR-ERNAM sy-vline 
WA_TDS_BILLHEAD_STR-NETWR sy-vline 
WA_TDS_BILLHEAD_STR-WAERK sy-vline 
WA_TDS_BILLHEAD_STR-MWSBK sy-vline 
WA_TDS_BILLHEAD_STR-KUNAG_T sy-vline 
WA_TDS_BILLHEAD_STR-KUNRG_T sy-vline 
WA_TDS_BILLHEAD_STR-FKART_T sy-vline 
WA_TDS_BILLHEAD_STR-BUKRS sy-vline 
WA_TDS_BILLHEAD_STR-ERDAT sy-vline 
WA_TDS_BILLHEAD_STR-PAYMENT_CLEARED sy-vline 
WA_TDS_BILLHEAD_STR-VKORG_T sy-vline 
WA_TDS_BILLHEAD_STR-VTWEG_T sy-vline 
WA_TDS_BILLHEAD_STR-SPART sy-vline 
WA_TDS_BILLHEAD_STR-SPART_T sy-vline 
WA_TDS_BILLHEAD_STR-VBTYP_T sy-vline 
WA_TDS_BILLHEAD_STR-RFBSK_T sy-vline 
WA_TDS_BILLHEAD_STR-BSTNK_VF sy-vline 
WA_TDS_BILLHEAD_STR-XBLNR sy-vline 
WA_TDS_BILLHEAD_STR-ZUONR sy-vline 
WA_TDS_BILLHEAD_STR-FKSTO sy-vline 
WA_TDS_BILLHEAD_STR-INCO1 sy-vline 
WA_TDS_BILLHEAD_STR-INCO2 sy-vline 
WA_TDS_BILLHEAD_STR-VSBED sy-vline 
WA_TDS_BILLHEAD_STR-PARVW sy-vline 
WA_TDS_BILLHEAD_STR-PARVW_T sy-vline 
WA_TDS_BILLHEAD_STR-ZPERS_T sy-vline 
WA_TDS_BILLHEAD_STR-ZPERS sy-vline 
WA_TDS_BILLHEAD_STR-MADAT sy-vline 
WA_TDS_BILLHEAD_STR-FAEDT sy-vline 
WA_TDS_BILLHEAD_STR-BBLNR sy-vline 
WA_TDS_BILLHEAD_STR-AUGDT sy-vline      INTO ld_text SEPARATED BY SPACE.

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