ABAP Select data from SAP table PC20P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC20P 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 PC20P. 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 PC20P 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_PC20P TYPE STANDARD TABLE OF PC20P,
      WA_PC20P TYPE PC20P,
      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: <PC20P> TYPE PC20P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC20P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC20P
  INTO TABLE IT_PC20P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC20P
*  INTO TABLE @DATA(IT_PC20P2).
*--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_PC20P INDEX 1 INTO DATA(WA_PC20P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC20P ASSIGNING <PC20P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC20P>-CNTR2 = 1.
<PC20P>-BEGDA = 1.
<PC20P>-ENDDA = 1.
<PC20P>-JUPER = 1.
<PC20P>-STKRT = 1.

ENDLOOP.

LOOP AT IT_PC20P INTO WA_PC20P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC20P-STPFL, sy-vline,
  WA_PC20P-STRKL, sy-vline,
  WA_PC20P-STTAB, sy-vline,
  WA_PC20P-KDFBT, sy-vline,
  WA_PC20P-STRKD, sy-vline,
  WA_PC20P-KISTA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC20P 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_PC20P 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_PC20P INTO WA_PC20P.


*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_PC20P_STR, 
CNTR2 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
JUPER TYPE STRING,
STKRT TYPE STRING,
STPFL TYPE STRING,
STRKL TYPE STRING,
STTAB TYPE STRING,
KDFBT TYPE STRING,
STRKD TYPE STRING,
KISTA TYPE STRING,
KISTE TYPE STRING,
KISTG TYPE STRING,
PRMNZ TYPE STRING,
MODEL TYPE STRING,
LZZRM TYPE STRING,
STAGE TYPE STRING,
VFREI TYPE STRING,
ALTKZ TYPE STRING,
FRB1M TYPE STRING,
FRB1J TYPE STRING,
FRB2M TYPE STRING,
FRB2J TYPE STRING,
STFRG TYPE STRING,
STBFG TYPE STRING,
STRSO TYPE STRING,
STRS2 TYPE STRING,
SPER1 TYPE STRING,
SPER2 TYPE STRING,
SPER3 TYPE STRING,
SPER4 TYPE STRING,
SPER5 TYPE STRING,
SPERK TYPE STRING,
BEGBZ TYPE STRING,
DSTLB TYPE STRING,
T5D2M TYPE STRING,
GMDNR TYPE STRING,
FZAMT TYPE STRING,
STBEL TYPE STRING,
AUSN1 TYPE STRING,
SIDNR TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
AGSNR TYPE STRING,
FAKTOR TYPE STRING,
PKPV TYPE STRING,
ELSTAM TYPE STRING,
KVZ TYPE STRING,
KRV TYPE STRING,
PKV TYPE STRING,
PVZ TYPE STRING,
PVS TYPE STRING,
DBALD TYPE STRING,
L2016 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC20P_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_PC20P_STR-CNTR2 sy-vline 
WA_PC20P_STR-BEGDA sy-vline 
WA_PC20P_STR-ENDDA sy-vline 
WA_PC20P_STR-JUPER sy-vline 
WA_PC20P_STR-STKRT sy-vline 
WA_PC20P_STR-STPFL sy-vline 
WA_PC20P_STR-STRKL sy-vline 
WA_PC20P_STR-STTAB sy-vline 
WA_PC20P_STR-KDFBT sy-vline 
WA_PC20P_STR-STRKD sy-vline 
WA_PC20P_STR-KISTA sy-vline 
WA_PC20P_STR-KISTE sy-vline 
WA_PC20P_STR-KISTG sy-vline 
WA_PC20P_STR-PRMNZ sy-vline 
WA_PC20P_STR-MODEL sy-vline 
WA_PC20P_STR-LZZRM sy-vline 
WA_PC20P_STR-STAGE sy-vline 
WA_PC20P_STR-VFREI sy-vline 
WA_PC20P_STR-ALTKZ sy-vline 
WA_PC20P_STR-FRB1M sy-vline 
WA_PC20P_STR-FRB1J sy-vline 
WA_PC20P_STR-FRB2M sy-vline 
WA_PC20P_STR-FRB2J sy-vline 
WA_PC20P_STR-STFRG sy-vline 
WA_PC20P_STR-STBFG sy-vline 
WA_PC20P_STR-STRSO sy-vline 
WA_PC20P_STR-STRS2 sy-vline 
WA_PC20P_STR-SPER1 sy-vline 
WA_PC20P_STR-SPER2 sy-vline 
WA_PC20P_STR-SPER3 sy-vline 
WA_PC20P_STR-SPER4 sy-vline 
WA_PC20P_STR-SPER5 sy-vline 
WA_PC20P_STR-SPERK sy-vline 
WA_PC20P_STR-BEGBZ sy-vline 
WA_PC20P_STR-DSTLB sy-vline 
WA_PC20P_STR-T5D2M sy-vline 
WA_PC20P_STR-GMDNR sy-vline 
WA_PC20P_STR-FZAMT sy-vline 
WA_PC20P_STR-STBEL sy-vline 
WA_PC20P_STR-AUSN1 sy-vline 
WA_PC20P_STR-SIDNR sy-vline 
WA_PC20P_STR-WERKS sy-vline 
WA_PC20P_STR-BTRTL sy-vline 
WA_PC20P_STR-AGSNR sy-vline 
WA_PC20P_STR-FAKTOR sy-vline 
WA_PC20P_STR-PKPV sy-vline 
WA_PC20P_STR-ELSTAM sy-vline 
WA_PC20P_STR-KVZ sy-vline 
WA_PC20P_STR-KRV sy-vline 
WA_PC20P_STR-PKV sy-vline 
WA_PC20P_STR-PVZ sy-vline 
WA_PC20P_STR-PVS sy-vline 
WA_PC20P_STR-DBALD sy-vline 
WA_PC20P_STR-L2016 sy-vline      INTO ld_text SEPARATED BY SPACE.

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