ABAP Select data from SAP table PC2QW into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2QW 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 PC2QW. 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 PC2QW 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_PC2QW TYPE STANDARD TABLE OF PC2QW,
      WA_PC2QW TYPE PC2QW,
      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: <PC2QW> TYPE PC2QW.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2QW.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2QW
  INTO TABLE IT_PC2QW.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2QW
*  INTO TABLE @DATA(IT_PC2QW2).
*--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_PC2QW INDEX 1 INTO DATA(WA_PC2QW2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2QW ASSIGNING <PC2QW>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2QW>-CNTR3 = 1.
<PC2QW>-BEGDA = 1.
<PC2QW>-ENDDA = 1.
<PC2QW>-SUBTY = 1.
<PC2QW>-OBJPS = 1.

ENDLOOP.

LOOP AT IT_PC2QW INTO WA_PC2QW.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2QW-FCNAM, sy-vline,
  WA_PC2QW-FGBDT, sy-vline,
  WA_PC2QW-ICNUM, sy-vline,
  WA_PC2QW-ICTYP, sy-vline,
  WA_PC2QW-UFBOT, sy-vline,
  WA_PC2QW-STINV, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2QW 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_PC2QW 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_PC2QW INTO WA_PC2QW.


*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 FGBDT
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PC2QW-FGBDT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2QW-FGBDT.
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_PC2QW_STR, 
CNTR3 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
FCNAM TYPE STRING,
FGBDT TYPE STRING,
ICNUM TYPE STRING,
ICTYP TYPE STRING,
UFBOT TYPE STRING,
STINV TYPE STRING,
ESCOL TYPE STRING,
SALFA TYPE STRING,
IRFLG TYPE STRING,
SERIE TYPE STRING,
MODEN TYPE STRING,
ESCOA TYPE STRING,
DTCVC TYPE STRING,
SALED TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2QW_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_PC2QW_STR-CNTR3 sy-vline 
WA_PC2QW_STR-BEGDA sy-vline 
WA_PC2QW_STR-ENDDA sy-vline 
WA_PC2QW_STR-SUBTY sy-vline 
WA_PC2QW_STR-OBJPS sy-vline 
WA_PC2QW_STR-FCNAM sy-vline 
WA_PC2QW_STR-FGBDT sy-vline 
WA_PC2QW_STR-ICNUM sy-vline 
WA_PC2QW_STR-ICTYP sy-vline 
WA_PC2QW_STR-UFBOT sy-vline 
WA_PC2QW_STR-STINV sy-vline 
WA_PC2QW_STR-ESCOL sy-vline 
WA_PC2QW_STR-SALFA sy-vline 
WA_PC2QW_STR-IRFLG sy-vline 
WA_PC2QW_STR-SERIE sy-vline 
WA_PC2QW_STR-MODEN sy-vline 
WA_PC2QW_STR-ESCOA sy-vline 
WA_PC2QW_STR-DTCVC sy-vline 
WA_PC2QW_STR-SALED sy-vline      INTO ld_text SEPARATED BY SPACE.

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