ABAP Select data from SAP table P02K_ACCT_ENTRY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P02K_ACCT_ENTRY 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 P02K_ACCT_ENTRY. 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 P02K_ACCT_ENTRY 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_P02K_ACCT_ENTRY TYPE STANDARD TABLE OF P02K_ACCT_ENTRY,
      WA_P02K_ACCT_ENTRY TYPE P02K_ACCT_ENTRY,
      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: <P02K_ACCT_ENTRY> TYPE P02K_ACCT_ENTRY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P02K_ACCT_ENTRY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P02K_ACCT_ENTRY
  INTO TABLE IT_P02K_ACCT_ENTRY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P02K_ACCT_ENTRY
*  INTO TABLE @DATA(IT_P02K_ACCT_ENTRY2).
*--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_P02K_ACCT_ENTRY INDEX 1 INTO DATA(WA_P02K_ACCT_ENTRY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P02K_ACCT_ENTRY ASSIGNING <P02K_ACCT_ENTRY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P02K_ACCT_ENTRY>-KONNR = 1.
<P02K_ACCT_ENTRY>-BUSTA = 1.
<P02K_ACCT_ENTRY>-VADAT = 1.
<P02K_ACCT_ENTRY>-BUDAT = 1.
<P02K_ACCT_ENTRY>-SEQNR = 1.

ENDLOOP.

LOOP AT IT_P02K_ACCT_ENTRY INTO WA_P02K_ACCT_ENTRY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P02K_ACCT_ENTRY-VALTY, sy-vline,
  WA_P02K_ACCT_ENTRY-VTYTX, sy-vline,
  WA_P02K_ACCT_ENTRY-VALUE, sy-vline,
  WA_P02K_ACCT_ENTRY-UAVAL0, sy-vline,
  WA_P02K_ACCT_ENTRY-UAVAL2, sy-vline,
  WA_P02K_ACCT_ENTRY-UAVAL4, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P02K_ACCT_ENTRY 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_P02K_ACCT_ENTRY 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_P02K_ACCT_ENTRY INTO WA_P02K_ACCT_ENTRY.


*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 GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_P02K_ACCT_ENTRY-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_P02K_ACCT_ENTRY-PABRJ.
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_P02K_ACCT_ENTRY_STR, 
KONNR TYPE STRING,
BUSTA TYPE STRING,
VADAT TYPE STRING,
BUDAT TYPE STRING,
SEQNR TYPE STRING,
VALTY TYPE STRING,
VTYTX TYPE STRING,
VALUE TYPE STRING,
UAVAL0 TYPE STRING,
UAVAL2 TYPE STRING,
UAVAL4 TYPE STRING,
UAVAL6 TYPE STRING,
PABRP TYPE STRING,
PABRJ TYPE STRING,
ORGIN TYPE STRING,
UNAME TYPE STRING,
PERNR TYPE STRING,
LKICON TYPE STRING,
FIICON TYPE STRING,
BUNUM TYPE STRING,
STICON TYPE STRING,
CHDAT TYPE STRING,
RUNID TYPE STRING,
FIBUK TYPE STRING,
ENTRY_IX TYPE STRING,
EVENT TYPE STRING,
EVDAT TYPE STRING,
OREVT TYPE STRING,
ORDAT TYPE STRING,
EVICON TYPE STRING,
EVTXT TYPE STRING,
OVTXT TYPE STRING,
SEQST TYPE STRING,
DTAID TYPE STRING,
DTADT TYPE STRING,
DTATI TYPE STRING,
DTA_STATUS TYPE STRING,
DTA_STATXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P02K_ACCT_ENTRY_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_P02K_ACCT_ENTRY_STR-KONNR sy-vline 
WA_P02K_ACCT_ENTRY_STR-BUSTA sy-vline 
WA_P02K_ACCT_ENTRY_STR-VADAT sy-vline 
WA_P02K_ACCT_ENTRY_STR-BUDAT sy-vline 
WA_P02K_ACCT_ENTRY_STR-SEQNR sy-vline 
WA_P02K_ACCT_ENTRY_STR-VALTY sy-vline 
WA_P02K_ACCT_ENTRY_STR-VTYTX sy-vline 
WA_P02K_ACCT_ENTRY_STR-VALUE sy-vline 
WA_P02K_ACCT_ENTRY_STR-UAVAL0 sy-vline 
WA_P02K_ACCT_ENTRY_STR-UAVAL2 sy-vline 
WA_P02K_ACCT_ENTRY_STR-UAVAL4 sy-vline 
WA_P02K_ACCT_ENTRY_STR-UAVAL6 sy-vline 
WA_P02K_ACCT_ENTRY_STR-PABRP sy-vline 
WA_P02K_ACCT_ENTRY_STR-PABRJ sy-vline 
WA_P02K_ACCT_ENTRY_STR-ORGIN sy-vline 
WA_P02K_ACCT_ENTRY_STR-UNAME sy-vline 
WA_P02K_ACCT_ENTRY_STR-PERNR sy-vline 
WA_P02K_ACCT_ENTRY_STR-LKICON sy-vline 
WA_P02K_ACCT_ENTRY_STR-FIICON sy-vline 
WA_P02K_ACCT_ENTRY_STR-BUNUM sy-vline 
WA_P02K_ACCT_ENTRY_STR-STICON sy-vline 
WA_P02K_ACCT_ENTRY_STR-CHDAT sy-vline 
WA_P02K_ACCT_ENTRY_STR-RUNID sy-vline 
WA_P02K_ACCT_ENTRY_STR-FIBUK sy-vline 
WA_P02K_ACCT_ENTRY_STR-ENTRY_IX sy-vline 
WA_P02K_ACCT_ENTRY_STR-EVENT sy-vline 
WA_P02K_ACCT_ENTRY_STR-EVDAT sy-vline 
WA_P02K_ACCT_ENTRY_STR-OREVT sy-vline 
WA_P02K_ACCT_ENTRY_STR-ORDAT sy-vline 
WA_P02K_ACCT_ENTRY_STR-EVICON sy-vline 
WA_P02K_ACCT_ENTRY_STR-EVTXT sy-vline 
WA_P02K_ACCT_ENTRY_STR-OVTXT sy-vline 
WA_P02K_ACCT_ENTRY_STR-SEQST sy-vline 
WA_P02K_ACCT_ENTRY_STR-DTAID sy-vline 
WA_P02K_ACCT_ENTRY_STR-DTADT sy-vline 
WA_P02K_ACCT_ENTRY_STR-DTATI sy-vline 
WA_P02K_ACCT_ENTRY_STR-DTA_STATUS sy-vline 
WA_P02K_ACCT_ENTRY_STR-DTA_STATXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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