ABAP Select data from SAP table TDS_ITEMCOMIC into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP TDS_ITEMCOMIC 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_ITEMCOMIC. 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_ITEMCOMIC 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_ITEMCOMIC TYPE STANDARD TABLE OF TDS_ITEMCOMIC,
      WA_TDS_ITEMCOMIC TYPE TDS_ITEMCOMIC,
      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_ITEMCOMIC> TYPE TDS_ITEMCOMIC.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM TDS_ITEMCOMIC
*  INTO TABLE @DATA(IT_TDS_ITEMCOMIC2).
*--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_ITEMCOMIC INDEX 1 INTO DATA(WA_TDS_ITEMCOMIC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<TDS_ITEMCOMIC>-HANDLE = 1.
<TDS_ITEMCOMIC>-SELKZ = 1.
<TDS_ITEMCOMIC>-POSNR = 1.
<TDS_ITEMCOMIC>-UEPOS = 1.
<TDS_ITEMCOMIC>-MABNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_TDS_ITEMCOMIC-MATNR, sy-vline,
  WA_TDS_ITEMCOMIC-ARKTX, sy-vline,
  WA_TDS_ITEMCOMIC-PSTYV, sy-vline,
  WA_TDS_ITEMCOMIC-KDMAT, sy-vline,
  WA_TDS_ITEMCOMIC-KWMENG, sy-vline,
  WA_TDS_ITEMCOMIC-VRKME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_TDS_ITEMCOMIC 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_ITEMCOMIC 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_ITEMCOMIC INTO WA_TDS_ITEMCOMIC.


*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_TDS_ITEMCOMIC_STR, 
HANDLE TYPE STRING,
SELKZ TYPE STRING,
POSNR TYPE STRING,
UEPOS TYPE STRING,
MABNR TYPE STRING,
MATNR TYPE STRING,
ARKTX TYPE STRING,
PSTYV TYPE STRING,
KDMAT TYPE STRING,
KWMENG TYPE STRING,
VRKME TYPE STRING,
WERKS TYPE STRING,
LGORT TYPE STRING,
VSTEL TYPE STRING,
ROUTE TYPE STRING,
POSEX TYPE STRING,
FAKSP TYPE STRING,
BSTKD TYPE STRING,
BSTDK TYPE STRING,
ETDAT TYPE STRING,
PRGBZ TYPE STRING,
ZTERM TYPE STRING,
PRSDT TYPE STRING,
KURSK TYPE STRING,
FKDAT TYPE STRING,
INCO1 TYPE STRING,
INCO2 TYPE STRING,
ABGRU TYPE STRING,
LPRIO TYPE STRING,
BRGEW TYPE STRING,
NTGEW TYPE STRING,
GEWEI TYPE STRING,
VOLUM TYPE STRING,
VOLEH TYPE STRING,
SPART TYPE STRING,
WAERK TYPE STRING,
NETWR TYPE STRING,
NETPR TYPE STRING,
KSCHL TYPE STRING,
KOEIN TYPE STRING,
KBETR TYPE STRING,
KPEIN TYPE STRING,
KMEIN TYPE STRING,
KSTBS TYPE STRING,
MATWA TYPE STRING,
AUFNR TYPE STRING,
PS_PSP_PNR TYPE STRING,
MWSBP TYPE STRING,
ZMENG TYPE STRING,
ZIEME TYPE STRING,
AWAHR TYPE STRING,
FIXMG TYPE STRING,
ZLSCH TYPE STRING,
KZTLF TYPE STRING,
ANTLF TYPE STRING,
GRKOR TYPE STRING,
CHARG TYPE STRING,
DELCO TYPE STRING,
T_PSP_PNR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_TDS_ITEMCOMIC_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_ITEMCOMIC_STR-HANDLE sy-vline 
WA_TDS_ITEMCOMIC_STR-SELKZ sy-vline 
WA_TDS_ITEMCOMIC_STR-POSNR sy-vline 
WA_TDS_ITEMCOMIC_STR-UEPOS sy-vline 
WA_TDS_ITEMCOMIC_STR-MABNR sy-vline 
WA_TDS_ITEMCOMIC_STR-MATNR sy-vline 
WA_TDS_ITEMCOMIC_STR-ARKTX sy-vline 
WA_TDS_ITEMCOMIC_STR-PSTYV sy-vline 
WA_TDS_ITEMCOMIC_STR-KDMAT sy-vline 
WA_TDS_ITEMCOMIC_STR-KWMENG sy-vline 
WA_TDS_ITEMCOMIC_STR-VRKME sy-vline 
WA_TDS_ITEMCOMIC_STR-WERKS sy-vline 
WA_TDS_ITEMCOMIC_STR-LGORT sy-vline 
WA_TDS_ITEMCOMIC_STR-VSTEL sy-vline 
WA_TDS_ITEMCOMIC_STR-ROUTE sy-vline 
WA_TDS_ITEMCOMIC_STR-POSEX sy-vline 
WA_TDS_ITEMCOMIC_STR-FAKSP sy-vline 
WA_TDS_ITEMCOMIC_STR-BSTKD sy-vline 
WA_TDS_ITEMCOMIC_STR-BSTDK sy-vline 
WA_TDS_ITEMCOMIC_STR-ETDAT sy-vline 
WA_TDS_ITEMCOMIC_STR-PRGBZ sy-vline 
WA_TDS_ITEMCOMIC_STR-ZTERM sy-vline 
WA_TDS_ITEMCOMIC_STR-PRSDT sy-vline 
WA_TDS_ITEMCOMIC_STR-KURSK sy-vline 
WA_TDS_ITEMCOMIC_STR-FKDAT sy-vline 
WA_TDS_ITEMCOMIC_STR-INCO1 sy-vline 
WA_TDS_ITEMCOMIC_STR-INCO2 sy-vline 
WA_TDS_ITEMCOMIC_STR-ABGRU sy-vline 
WA_TDS_ITEMCOMIC_STR-LPRIO sy-vline 
WA_TDS_ITEMCOMIC_STR-BRGEW sy-vline 
WA_TDS_ITEMCOMIC_STR-NTGEW sy-vline 
WA_TDS_ITEMCOMIC_STR-GEWEI sy-vline 
WA_TDS_ITEMCOMIC_STR-VOLUM sy-vline 
WA_TDS_ITEMCOMIC_STR-VOLEH sy-vline 
WA_TDS_ITEMCOMIC_STR-SPART sy-vline 
WA_TDS_ITEMCOMIC_STR-WAERK sy-vline 
WA_TDS_ITEMCOMIC_STR-NETWR sy-vline 
WA_TDS_ITEMCOMIC_STR-NETPR sy-vline 
WA_TDS_ITEMCOMIC_STR-KSCHL sy-vline 
WA_TDS_ITEMCOMIC_STR-KOEIN sy-vline 
WA_TDS_ITEMCOMIC_STR-KBETR sy-vline 
WA_TDS_ITEMCOMIC_STR-KPEIN sy-vline 
WA_TDS_ITEMCOMIC_STR-KMEIN sy-vline 
WA_TDS_ITEMCOMIC_STR-KSTBS sy-vline 
WA_TDS_ITEMCOMIC_STR-MATWA sy-vline 
WA_TDS_ITEMCOMIC_STR-AUFNR sy-vline 
WA_TDS_ITEMCOMIC_STR-PS_PSP_PNR sy-vline 
WA_TDS_ITEMCOMIC_STR-MWSBP sy-vline 
WA_TDS_ITEMCOMIC_STR-ZMENG sy-vline 
WA_TDS_ITEMCOMIC_STR-ZIEME sy-vline 
WA_TDS_ITEMCOMIC_STR-AWAHR sy-vline 
WA_TDS_ITEMCOMIC_STR-FIXMG sy-vline 
WA_TDS_ITEMCOMIC_STR-ZLSCH sy-vline 
WA_TDS_ITEMCOMIC_STR-KZTLF sy-vline 
WA_TDS_ITEMCOMIC_STR-ANTLF sy-vline 
WA_TDS_ITEMCOMIC_STR-GRKOR sy-vline 
WA_TDS_ITEMCOMIC_STR-CHARG sy-vline 
WA_TDS_ITEMCOMIC_STR-DELCO sy-vline 
WA_TDS_ITEMCOMIC_STR-T_PSP_PNR sy-vline      INTO ld_text SEPARATED BY SPACE.

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