ABAP Select data from SAP table VNTPKCH_QLDI into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM VNTPKCH_QLDI
*  INTO TABLE @DATA(IT_VNTPKCH_QLDI2).
*--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_VNTPKCH_QLDI INDEX 1 INTO DATA(WA_VNTPKCH_QLDI2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<VNTPKCH_QLDI>-MANDT = 1.
<VNTPKCH_QLDI>-EINRI = 1.
<VNTPKCH_QLDI>-TARIF = 1.
<VNTPKCH_QLDI>-TALST = 1.
<VNTPKCH_QLDI>-QLDIG = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_VNTPKCH_QLDI-BEGDT, sy-vline,
  WA_VNTPKCH_QLDI-ENDDT, sy-vline,
  WA_VNTPKCH_QLDI-ERDAT, sy-vline,
  WA_VNTPKCH_QLDI-ERUSR, sy-vline,
  WA_VNTPKCH_QLDI-ERTIM, sy-vline,
  WA_VNTPKCH_QLDI-UPDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_VNTPKCH_QLDI 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_VNTPKCH_QLDI 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_VNTPKCH_QLDI INTO WA_VNTPKCH_QLDI.


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

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

*Conversion exit ALPHA, internal->external for field TALST
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_VNTPKCH_QLDI-TALST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_VNTPKCH_QLDI-TALST.
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_VNTPKCH_QLDI_STR, 
MANDT TYPE STRING,
EINRI TYPE STRING,
TARIF TYPE STRING,
TALST TYPE STRING,
QLDIG TYPE STRING,
BEGDT TYPE STRING,
ENDDT TYPE STRING,
ERDAT TYPE STRING,
ERUSR TYPE STRING,
ERTIM TYPE STRING,
UPDAT TYPE STRING,
UPUSR TYPE STRING,
UPTIM TYPE STRING,
VERS_NAME_I TYPE STRING,
VERS_NAME_U TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_VNTPKCH_QLDI_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_VNTPKCH_QLDI_STR-MANDT sy-vline 
WA_VNTPKCH_QLDI_STR-EINRI sy-vline 
WA_VNTPKCH_QLDI_STR-TARIF sy-vline 
WA_VNTPKCH_QLDI_STR-TALST sy-vline 
WA_VNTPKCH_QLDI_STR-QLDIG sy-vline 
WA_VNTPKCH_QLDI_STR-BEGDT sy-vline 
WA_VNTPKCH_QLDI_STR-ENDDT sy-vline 
WA_VNTPKCH_QLDI_STR-ERDAT sy-vline 
WA_VNTPKCH_QLDI_STR-ERUSR sy-vline 
WA_VNTPKCH_QLDI_STR-ERTIM sy-vline 
WA_VNTPKCH_QLDI_STR-UPDAT sy-vline 
WA_VNTPKCH_QLDI_STR-UPUSR sy-vline 
WA_VNTPKCH_QLDI_STR-UPTIM sy-vline 
WA_VNTPKCH_QLDI_STR-VERS_NAME_I sy-vline 
WA_VNTPKCH_QLDI_STR-VERS_NAME_U sy-vline 
WA_VNTPKCH_QLDI_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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