ABAP Select data from SAP table PC2U2 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2U2 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 PC2U2. 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 PC2U2 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_PC2U2 TYPE STANDARD TABLE OF PC2U2,
      WA_PC2U2 TYPE PC2U2,
      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: <PC2U2> TYPE PC2U2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2U2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2U2
  INTO TABLE IT_PC2U2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2U2
*  INTO TABLE @DATA(IT_PC2U22).
*--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_PC2U2 INDEX 1 INTO DATA(WA_PC2U22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2U2 ASSIGNING <PC2U2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2U2>-CNTR1 = 1.
<PC2U2>-TAXTY = 1.
<PC2U2>-TAXAU = 1.
<PC2U2>-RTYPE = 1.
<PC2U2>-TAXLV = 1.

ENDLOOP.

LOOP AT IT_PC2U2 INTO WA_PC2U2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2U2-TAXER, sy-vline,
  WA_PC2U2-NTXCO, sy-vline,
  WA_PC2U2-TAXNT, sy-vline,
  WA_PC2U2-SUPTX, sy-vline,
  WA_PC2U2-TXNRP, sy-vline,
  WA_PC2U2-HRSWK, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2U2 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_PC2U2 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_PC2U2 INTO WA_PC2U2.


*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 TXTYP, internal->external for field TAXTY
CALL FUNCTION 'CONVERSION_EXIT_TXTYP_OUTPUT'
  EXPORTING
    input =                      WA_PC2U2-TAXTY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2U2-TAXTY.
WRITE:/ 'New Value:', ld_input.

*Conversion exit P10FM, internal->external for field FRMNR
CALL FUNCTION 'CONVERSION_EXIT_P10FM_OUTPUT'
  EXPORTING
    input =                      WA_PC2U2-FRMNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2U2-FRMNR.
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_PC2U2_STR, 
CNTR1 TYPE STRING,
TAXTY TYPE STRING,
TAXAU TYPE STRING,
RTYPE TYPE STRING,
TAXLV TYPE STRING,
TAXER TYPE STRING,
NTXCO TYPE STRING,
TAXNT TYPE STRING,
SUPTX TYPE STRING,
TXNRP TYPE STRING,
HRSWK TYPE STRING,
REPER TYPE STRING,
TXDER TYPE STRING,
CCTAX TYPE STRING,
FRMNR TYPE STRING,
EXIND TYPE STRING,
RNDID TYPE STRING,
PERNR_235 TYPE STRING,
TXBL TYPE STRING,
PERNR TYPE STRING,
TXCMP TYPE STRING,
CCTAA TYPE STRING,
TWDAY TYPE STRING,
TAXEX TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2U2_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_PC2U2_STR-CNTR1 sy-vline 
WA_PC2U2_STR-TAXTY sy-vline 
WA_PC2U2_STR-TAXAU sy-vline 
WA_PC2U2_STR-RTYPE sy-vline 
WA_PC2U2_STR-TAXLV sy-vline 
WA_PC2U2_STR-TAXER sy-vline 
WA_PC2U2_STR-NTXCO sy-vline 
WA_PC2U2_STR-TAXNT sy-vline 
WA_PC2U2_STR-SUPTX sy-vline 
WA_PC2U2_STR-TXNRP sy-vline 
WA_PC2U2_STR-HRSWK sy-vline 
WA_PC2U2_STR-REPER sy-vline 
WA_PC2U2_STR-TXDER sy-vline 
WA_PC2U2_STR-CCTAX sy-vline 
WA_PC2U2_STR-FRMNR sy-vline 
WA_PC2U2_STR-EXIND sy-vline 
WA_PC2U2_STR-RNDID sy-vline 
WA_PC2U2_STR-PERNR_235 sy-vline 
WA_PC2U2_STR-TXBL sy-vline 
WA_PC2U2_STR-PERNR sy-vline 
WA_PC2U2_STR-TXCMP sy-vline 
WA_PC2U2_STR-CCTAA sy-vline 
WA_PC2U2_STR-TWDAY sy-vline 
WA_PC2U2_STR-TAXEX sy-vline      INTO ld_text SEPARATED BY SPACE.

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