ABAP Select data from SAP table PC4K2 into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC4K2 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 PC4K2. 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 PC4K2 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_PC4K2 TYPE STANDARD TABLE OF PC4K2,
      WA_PC4K2 TYPE PC4K2,
      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: <PC4K2> TYPE PC4K2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC4K2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC4K2
  INTO TABLE IT_PC4K2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC4K2
*  INTO TABLE @DATA(IT_PC4K22).
*--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_PC4K2 INDEX 1 INTO DATA(WA_PC4K22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC4K2 ASSIGNING <PC4K2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC4K2>-INDX1 = 1.
<PC4K2>-BUSNM = 1.
<PC4K2>-WRKAR = 1.
<PC4K2>-KOSTL = 1.
<PC4K2>-KTEXT = 1.

ENDLOOP.

LOOP AT IT_PC4K2 INTO WA_PC4K2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC4K2-PERID, sy-vline,
  WA_PC4K2-NACHN, sy-vline,
  WA_PC4K2-VORNA, sy-vline,
  WA_PC4K2-INITS, sy-vline,
  WA_PC4K2-SPRSL, sy-vline,
  WA_PC4K2-STRAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC4K2 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_PC4K2 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_PC4K2 INTO WA_PC4K2.


*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 ALPHA, internal->external for field KOSTL
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PC4K2-KOSTL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC4K2-KOSTL.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ISOLA, internal->external for field SPRSL
CALL FUNCTION 'CONVERSION_EXIT_ISOLA_OUTPUT'
  EXPORTING
    input =                      WA_PC4K2-SPRSL
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC4K2-SPRSL.
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_PC4K2_STR, 
INDX1 TYPE STRING,
BUSNM TYPE STRING,
WRKAR TYPE STRING,
KOSTL TYPE STRING,
KTEXT TYPE STRING,
PERID TYPE STRING,
NACHN TYPE STRING,
VORNA TYPE STRING,
INITS TYPE STRING,
SPRSL TYPE STRING,
STRAS TYPE STRING,
LOCAT TYPE STRING,
ORT01 TYPE STRING,
STATE TYPE STRING,
PSTLZ TYPE STRING,
LAND1 TYPE STRING,
CUSTOM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC4K2_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_PC4K2_STR-INDX1 sy-vline 
WA_PC4K2_STR-BUSNM sy-vline 
WA_PC4K2_STR-WRKAR sy-vline 
WA_PC4K2_STR-KOSTL sy-vline 
WA_PC4K2_STR-KTEXT sy-vline 
WA_PC4K2_STR-PERID sy-vline 
WA_PC4K2_STR-NACHN sy-vline 
WA_PC4K2_STR-VORNA sy-vline 
WA_PC4K2_STR-INITS sy-vline 
WA_PC4K2_STR-SPRSL sy-vline 
WA_PC4K2_STR-STRAS sy-vline 
WA_PC4K2_STR-LOCAT sy-vline 
WA_PC4K2_STR-ORT01 sy-vline 
WA_PC4K2_STR-STATE sy-vline 
WA_PC4K2_STR-PSTLZ sy-vline 
WA_PC4K2_STR-LAND1 sy-vline 
WA_PC4K2_STR-CUSTOM sy-vline      INTO ld_text SEPARATED BY SPACE.

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