ABAP Select data from SAP table PC20S into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC20S 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 PC20S. 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 PC20S 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_PC20S TYPE STANDARD TABLE OF PC20S,
      WA_PC20S TYPE PC20S,
      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: <PC20S> TYPE PC20S.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC20S.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC20S
  INTO TABLE IT_PC20S.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC20S
*  INTO TABLE @DATA(IT_PC20S2).
*--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_PC20S INDEX 1 INTO DATA(WA_PC20S2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC20S ASSIGNING <PC20S>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC20S>-CNTR2 = 1.
<PC20S>-BEGDA = 1.
<PC20S>-ENDDA = 1.
<PC20S>-STAKZ = 1.
<PC20S>-ORDNZ = 1.

ENDLOOP.

LOOP AT IT_PC20S INTO WA_PC20S.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC20S-FLAGB, sy-vline,
  WA_PC20S-STAFS, sy-vline,
  WA_PC20S-ALLKZ, sy-vline,
  WA_PC20S-STAGR, sy-vline,
  WA_PC20S-STAKD, sy-vline,
  WA_PC20S-LSSTP, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC20S 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_PC20S 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_PC20S INTO WA_PC20S.


*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_PC20S_STR, 
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
STAKZ TYPE STRING,
ORDNZ TYPE STRING,
FLAGB TYPE STRING,
STAFS TYPE STRING,
ALLKZ TYPE STRING,
STAGR TYPE STRING,
STAKD TYPE STRING,
LSSTP TYPE STRING,
STAF1 TYPE STRING,
LABKZ TYPE STRING,
WERBP TYPE STRING,
PENKZ TYPE STRING,
STAFR TYPE STRING,
FBP68 TYPE STRING,
STAFZ TYPE STRING,
STAKA TYPE STRING,
STAKN TYPE STRING,
STANR TYPE STRING,
JHAUS TYPE STRING,
KIRCH TYPE STRING,
PRMJH TYPE STRING,
AU691 TYPE STRING,
STP35 TYPE STRING,
FBP35 TYPE STRING,
PPART TYPE STRING,
FAHRT TYPE STRING,
BETRG TYPE STRING,
AUVL1 TYPE STRING,
ARTLZ TYPE STRING,
DBABM TYPE STRING,
FWAGN TYPE STRING,
PPFKT TYPE STRING,
WEGKM TYPE STRING,
WRKVK TYPE STRING,
JBTKT TYPE STRING,
PRECH TYPE STRING,
ALAND TYPE STRING,
KWBKB TYPE STRING,
E1031 TYPE STRING,
FABOPH TYPE STRING,
STP35P TYPE STRING,
FBP35P TYPE STRING,
PPFHO TYPE STRING,
CHOCK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC20S_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_PC20S_STR-CNTR2 sy-vline 
WA_PC20S_STR-BEGDA sy-vline 
WA_PC20S_STR-ENDDA sy-vline 
WA_PC20S_STR-STAKZ sy-vline 
WA_PC20S_STR-ORDNZ sy-vline 
WA_PC20S_STR-FLAGB sy-vline 
WA_PC20S_STR-STAFS sy-vline 
WA_PC20S_STR-ALLKZ sy-vline 
WA_PC20S_STR-STAGR sy-vline 
WA_PC20S_STR-STAKD sy-vline 
WA_PC20S_STR-LSSTP sy-vline 
WA_PC20S_STR-STAF1 sy-vline 
WA_PC20S_STR-LABKZ sy-vline 
WA_PC20S_STR-WERBP sy-vline 
WA_PC20S_STR-PENKZ sy-vline 
WA_PC20S_STR-STAFR sy-vline 
WA_PC20S_STR-FBP68 sy-vline 
WA_PC20S_STR-STAFZ sy-vline 
WA_PC20S_STR-STAKA sy-vline 
WA_PC20S_STR-STAKN sy-vline 
WA_PC20S_STR-STANR sy-vline 
WA_PC20S_STR-JHAUS sy-vline 
WA_PC20S_STR-KIRCH sy-vline 
WA_PC20S_STR-PRMJH sy-vline 
WA_PC20S_STR-AU691 sy-vline 
WA_PC20S_STR-STP35 sy-vline 
WA_PC20S_STR-FBP35 sy-vline 
WA_PC20S_STR-PPART sy-vline 
WA_PC20S_STR-FAHRT sy-vline 
WA_PC20S_STR-BETRG sy-vline 
WA_PC20S_STR-AUVL1 sy-vline 
WA_PC20S_STR-ARTLZ sy-vline 
WA_PC20S_STR-DBABM sy-vline 
WA_PC20S_STR-FWAGN sy-vline 
WA_PC20S_STR-PPFKT sy-vline 
WA_PC20S_STR-WEGKM sy-vline 
WA_PC20S_STR-WRKVK sy-vline 
WA_PC20S_STR-JBTKT sy-vline 
WA_PC20S_STR-PRECH sy-vline 
WA_PC20S_STR-ALAND sy-vline 
WA_PC20S_STR-KWBKB sy-vline 
WA_PC20S_STR-E1031 sy-vline 
WA_PC20S_STR-FABOPH sy-vline 
WA_PC20S_STR-STP35P sy-vline 
WA_PC20S_STR-FBP35P sy-vline 
WA_PC20S_STR-PPFHO sy-vline 
WA_PC20S_STR-CHOCK sy-vline      INTO ld_text SEPARATED BY SPACE.

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