ABAP Select data from SAP table PC2A2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2A2 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 PC2A2. 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 PC2A2 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_PC2A2 TYPE STANDARD TABLE OF PC2A2,
      WA_PC2A2 TYPE PC2A2,
      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: <PC2A2> TYPE PC2A2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2A2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2A2
  INTO TABLE IT_PC2A2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2A2
*  INTO TABLE @DATA(IT_PC2A22).
*--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_PC2A2 INDEX 1 INTO DATA(WA_PC2A22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2A2 ASSIGNING <PC2A2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2A2>-TARAR = 1.
<PC2A2>-GRAUS = 1.
<PC2A2>-ARBS4 = 1.
<PC2A2>-CTTYP = 1.
<PC2A2>-HERKN = 1.

ENDLOOP.

LOOP AT IT_PC2A2 INTO WA_PC2A2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2A2-RCLDT, sy-vline,
  WA_PC2A2-ARBFK, sy-vline,
  WA_PC2A2-ARBST, sy-vline,
  WA_PC2A2-MGTNV, sy-vline,
  WA_PC2A2-FAPOS, sy-vline,
  WA_PC2A2-FAAUS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2A2 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_PC2A2 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_PC2A2 INTO WA_PC2A2.


*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_PC2A2_STR, 
TARAR TYPE STRING,
GRAUS TYPE STRING,
ARBS4 TYPE STRING,
CTTYP TYPE STRING,
HERKN TYPE STRING,
RCLDT TYPE STRING,
ARBFK TYPE STRING,
ARBST TYPE STRING,
MGTNV TYPE STRING,
FAPOS TYPE STRING,
FAAUS TYPE STRING,
FAPRT TYPE STRING,
SGLST TYPE STRING,
STDAT TYPE STRING,
ENDAT TYPE STRING,
ENRSN TYPE STRING,
PAYGR TYPE STRING,
PAYLV TYPE STRING,
FAX01 TYPE STRING,
FAX02 TYPE STRING,
FAX03 TYPE STRING,
BSGRD TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2A2_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_PC2A2_STR-TARAR sy-vline 
WA_PC2A2_STR-GRAUS sy-vline 
WA_PC2A2_STR-ARBS4 sy-vline 
WA_PC2A2_STR-CTTYP sy-vline 
WA_PC2A2_STR-HERKN sy-vline 
WA_PC2A2_STR-RCLDT sy-vline 
WA_PC2A2_STR-ARBFK sy-vline 
WA_PC2A2_STR-ARBST sy-vline 
WA_PC2A2_STR-MGTNV sy-vline 
WA_PC2A2_STR-FAPOS sy-vline 
WA_PC2A2_STR-FAAUS sy-vline 
WA_PC2A2_STR-FAPRT sy-vline 
WA_PC2A2_STR-SGLST sy-vline 
WA_PC2A2_STR-STDAT sy-vline 
WA_PC2A2_STR-ENDAT sy-vline 
WA_PC2A2_STR-ENRSN sy-vline 
WA_PC2A2_STR-PAYGR sy-vline 
WA_PC2A2_STR-PAYLV sy-vline 
WA_PC2A2_STR-FAX01 sy-vline 
WA_PC2A2_STR-FAX02 sy-vline 
WA_PC2A2_STR-FAX03 sy-vline 
WA_PC2A2_STR-BSGRD sy-vline      INTO ld_text SEPARATED BY SPACE.

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