ABAP Select data from SAP table P01_KGID_MELD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01_KGID_MELD 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 P01_KGID_MELD. 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 P01_KGID_MELD 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_P01_KGID_MELD TYPE STANDARD TABLE OF P01_KGID_MELD,
      WA_P01_KGID_MELD TYPE P01_KGID_MELD,
      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: <P01_KGID_MELD> TYPE P01_KGID_MELD.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01_KGID_MELD.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01_KGID_MELD
  INTO TABLE IT_P01_KGID_MELD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01_KGID_MELD
*  INTO TABLE @DATA(IT_P01_KGID_MELD2).
*--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_P01_KGID_MELD INDEX 1 INTO DATA(WA_P01_KGID_MELD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01_KGID_MELD ASSIGNING <P01_KGID_MELD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01_KGID_MELD>-MANDT = 1.
<P01_KGID_MELD>-GUID = 1.
<P01_KGID_MELD>-PERNR = 1.
<P01_KGID_MELD>-STATUS = 1.
<P01_KGID_MELD>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_P01_KGID_MELD INTO WA_P01_KGID_MELD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01_KGID_MELD-ENDDA, sy-vline,
  WA_P01_KGID_MELD-FAMKAS, sy-vline,
  WA_P01_KGID_MELD-FACHVS, sy-vline,
  WA_P01_KGID_MELD-SIDKIND, sy-vline,
  WA_P01_KGID_MELD-GEBKIND, sy-vline,
  WA_P01_KGID_MELD-SIDBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01_KGID_MELD 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_P01_KGID_MELD 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_P01_KGID_MELD INTO WA_P01_KGID_MELD.


*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 PDATE, internal->external for field GEBKIND
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P01_KGID_MELD-GEBKIND
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P01_KGID_MELD-GEBKIND.
WRITE:/ 'New Value:', ld_input.

*Conversion exit PDATE, internal->external for field GEBBER
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_P01_KGID_MELD-GEBBER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P01_KGID_MELD-GEBBER.
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_P01_KGID_MELD_STR, 
MANDT TYPE STRING,
GUID TYPE STRING,
PERNR TYPE STRING,
STATUS TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
FAMKAS TYPE STRING,
FACHVS TYPE STRING,
SIDKIND TYPE STRING,
GEBKIND TYPE STRING,
SIDBER TYPE STRING,
GEBBER TYPE STRING,
MELDART TYPE STRING,
ZUZA TYPE STRING,
AKTAB TYPE STRING,
ABARBEITUNGSREIHENFOLGE TYPE STRING,
VONDA TYPE STRING,
BISDA TYPE STRING,
DATUM TYPE STRING,
UZEIT TYPE STRING,
REPORT TYPE STRING,
EUSER TYPE STRING,
DATEIID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01_KGID_MELD_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_P01_KGID_MELD_STR-MANDT sy-vline 
WA_P01_KGID_MELD_STR-GUID sy-vline 
WA_P01_KGID_MELD_STR-PERNR sy-vline 
WA_P01_KGID_MELD_STR-STATUS sy-vline 
WA_P01_KGID_MELD_STR-BEGDA sy-vline 
WA_P01_KGID_MELD_STR-ENDDA sy-vline 
WA_P01_KGID_MELD_STR-FAMKAS sy-vline 
WA_P01_KGID_MELD_STR-FACHVS sy-vline 
WA_P01_KGID_MELD_STR-SIDKIND sy-vline 
WA_P01_KGID_MELD_STR-GEBKIND sy-vline 
WA_P01_KGID_MELD_STR-SIDBER sy-vline 
WA_P01_KGID_MELD_STR-GEBBER sy-vline 
WA_P01_KGID_MELD_STR-MELDART sy-vline 
WA_P01_KGID_MELD_STR-ZUZA sy-vline 
WA_P01_KGID_MELD_STR-AKTAB sy-vline 
WA_P01_KGID_MELD_STR-ABARBEITUNGSREIHENFOLGE sy-vline 
WA_P01_KGID_MELD_STR-VONDA sy-vline 
WA_P01_KGID_MELD_STR-BISDA sy-vline 
WA_P01_KGID_MELD_STR-DATUM sy-vline 
WA_P01_KGID_MELD_STR-UZEIT sy-vline 
WA_P01_KGID_MELD_STR-REPORT sy-vline 
WA_P01_KGID_MELD_STR-EUSER sy-vline 
WA_P01_KGID_MELD_STR-DATEIID sy-vline      INTO ld_text SEPARATED BY SPACE.

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