ABAP Select data from SAP table PCAPG into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCAPG
*  INTO TABLE @DATA(IT_PCAPG2).
*--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_PCAPG INDEX 1 INTO DATA(WA_PCAPG2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCAPG>-BUKRS = 1.
<PCAPG>-WERKS = 1.
<PCAPG>-BTRTL = 1.
<PCAPG>-PERSG = 1.
<PCAPG>-PERSK = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCAPG-INFTY, sy-vline,
  WA_PCAPG-SUBTY, sy-vline,
  WA_PCAPG-ITBLD, sy-vline,
  WA_PCAPG-DYNNR, sy-vline,
  WA_PCAPG-FCODE, sy-vline,
  WA_PCAPG-ITYGR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PCAPG 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_PCAPG 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_PCAPG INTO WA_PCAPG.


*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_PCAPG_STR, 
BUKRS TYPE STRING,
WERKS TYPE STRING,
BTRTL TYPE STRING,
PERSG TYPE STRING,
PERSK TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
ITBLD TYPE STRING,
DYNNR TYPE STRING,
FCODE TYPE STRING,
ITYGR TYPE STRING,
MASSN TYPE STRING,
MASSG TYPE STRING,
MOLGA TYPE STRING,
MOABW TYPE STRING,
TCLAS TYPE STRING,
USERG TYPE STRING,
PERNR TYPE STRING,
ANSVH TYPE STRING,
ABKRS TYPE STRING,
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
STAT2 TYPE STRING,
WRKAR TYPE STRING,
RESAR TYPE STRING,
RCITY TYPE STRING,
REGNR TYPE STRING,
ACNBF TYPE STRING,
CGSTN TYPE STRING,
OPTIO TYPE STRING,
TOTCR TYPE STRING,
CLAIM TYPE STRING,
TNIND TYPE STRING,
ADDTX TYPE STRING,
TEXHD TYPE STRING,
NODEP TYPE STRING,
NODIS TYPE STRING,
MNTDE TYPE STRING,
OTXCR TYPE STRING,
LBTCR TYPE STRING,
CRTDE TYPE STRING,
COMRE TYPE STRING,
COMEX TYPE STRING,
QCTXI TYPE STRING,
QGSTN TYPE STRING,
TOTCQ TYPE STRING,
CLAQC TYPE STRING,
ADDTQ TYPE STRING,
OTHDE TYPE STRING,
OTXCQ TYPE STRING,
OTADE TYPE STRING,
COMEQ TYPE STRING,
MARRD TYPE STRING,
LSTPY TYPE STRING,
PROVR TYPE STRING,
WNSBN TYPE STRING,
TOTCP TYPE STRING,
OTXCP TYPE STRING,
LBTCP TYPE STRING,
PVTAX TYPE STRING,
PHLTH TYPE STRING,
BPA TYPE STRING,
BPA_FROM_TD1 TYPE STRING,
BPAP TYPE STRING,
BPA_FROM_TD1P TYPE STRING,
LGART TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCAPG_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_PCAPG_STR-BUKRS sy-vline 
WA_PCAPG_STR-WERKS sy-vline 
WA_PCAPG_STR-BTRTL sy-vline 
WA_PCAPG_STR-PERSG sy-vline 
WA_PCAPG_STR-PERSK sy-vline 
WA_PCAPG_STR-INFTY sy-vline 
WA_PCAPG_STR-SUBTY sy-vline 
WA_PCAPG_STR-ITBLD sy-vline 
WA_PCAPG_STR-DYNNR sy-vline 
WA_PCAPG_STR-FCODE sy-vline 
WA_PCAPG_STR-ITYGR sy-vline 
WA_PCAPG_STR-MASSN sy-vline 
WA_PCAPG_STR-MASSG sy-vline 
WA_PCAPG_STR-MOLGA sy-vline 
WA_PCAPG_STR-MOABW sy-vline 
WA_PCAPG_STR-TCLAS sy-vline 
WA_PCAPG_STR-USERG sy-vline 
WA_PCAPG_STR-PERNR sy-vline 
WA_PCAPG_STR-ANSVH sy-vline 
WA_PCAPG_STR-ABKRS sy-vline 
WA_PCAPG_STR-CNTR1 sy-vline 
WA_PCAPG_STR-BEGDA sy-vline 
WA_PCAPG_STR-ENDDA sy-vline 
WA_PCAPG_STR-STAT2 sy-vline 
WA_PCAPG_STR-WRKAR sy-vline 
WA_PCAPG_STR-RESAR sy-vline 
WA_PCAPG_STR-RCITY sy-vline 
WA_PCAPG_STR-REGNR sy-vline 
WA_PCAPG_STR-ACNBF sy-vline 
WA_PCAPG_STR-CGSTN sy-vline 
WA_PCAPG_STR-OPTIO sy-vline 
WA_PCAPG_STR-TOTCR sy-vline 
WA_PCAPG_STR-CLAIM sy-vline 
WA_PCAPG_STR-TNIND sy-vline 
WA_PCAPG_STR-ADDTX sy-vline 
WA_PCAPG_STR-TEXHD sy-vline 
WA_PCAPG_STR-NODEP sy-vline 
WA_PCAPG_STR-NODIS sy-vline 
WA_PCAPG_STR-MNTDE sy-vline 
WA_PCAPG_STR-OTXCR sy-vline 
WA_PCAPG_STR-LBTCR sy-vline 
WA_PCAPG_STR-CRTDE sy-vline 
WA_PCAPG_STR-COMRE sy-vline 
WA_PCAPG_STR-COMEX sy-vline 
WA_PCAPG_STR-QCTXI sy-vline 
WA_PCAPG_STR-QGSTN sy-vline 
WA_PCAPG_STR-TOTCQ sy-vline 
WA_PCAPG_STR-CLAQC sy-vline 
WA_PCAPG_STR-ADDTQ sy-vline 
WA_PCAPG_STR-OTHDE sy-vline 
WA_PCAPG_STR-OTXCQ sy-vline 
WA_PCAPG_STR-OTADE sy-vline 
WA_PCAPG_STR-COMEQ sy-vline 
WA_PCAPG_STR-MARRD sy-vline 
WA_PCAPG_STR-LSTPY sy-vline 
WA_PCAPG_STR-PROVR sy-vline 
WA_PCAPG_STR-WNSBN sy-vline 
WA_PCAPG_STR-TOTCP sy-vline 
WA_PCAPG_STR-OTXCP sy-vline 
WA_PCAPG_STR-LBTCP sy-vline 
WA_PCAPG_STR-PVTAX sy-vline 
WA_PCAPG_STR-PHLTH sy-vline 
WA_PCAPG_STR-BPA sy-vline 
WA_PCAPG_STR-BPA_FROM_TD1 sy-vline 
WA_PCAPG_STR-BPAP sy-vline 
WA_PCAPG_STR-BPA_FROM_TD1P sy-vline 
WA_PCAPG_STR-LGART sy-vline      INTO ld_text SEPARATED BY SPACE.

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