ABAP Select data from SAP table PC2PA into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2PA 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 PC2PA. 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 PC2PA 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_PC2PA TYPE STANDARD TABLE OF PC2PA,
      WA_PC2PA TYPE PC2PA,
      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: <PC2PA> TYPE PC2PA.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2PA.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2PA
  INTO TABLE IT_PC2PA.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2PA
*  INTO TABLE @DATA(IT_PC2PA2).
*--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_PC2PA INDEX 1 INTO DATA(WA_PC2PA2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2PA ASSIGNING <PC2PA>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2PA>-CNTR1 = 1.
<PC2PA>-BEGDA = 1.
<PC2PA>-ENDDA = 1.
<PC2PA>-BDATE = 1.
<PC2PA>-SSNUM = 1.

ENDLOOP.

LOOP AT IT_PC2PA INTO WA_PC2PA.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2PA-SSINS, sy-vline,
  WA_PC2PA-SSDTE, sy-vline,
  WA_PC2PA-CTRIT, sy-vline,
  WA_PC2PA-SSRGM, sy-vline,
  WA_PC2PA-CTTYP, sy-vline,
  WA_PC2PA-PSION, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2PA 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_PC2PA 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_PC2PA INTO WA_PC2PA.


*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 BDATE
CALL FUNCTION 'CONVERSION_EXIT_PDATE_OUTPUT'
  EXPORTING
    input =                      WA_PC2PA-BDATE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC2PA-BDATE.
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_PC2PA_STR, 
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BDATE TYPE STRING,
SSNUM TYPE STRING,
SSINS TYPE STRING,
SSDTE TYPE STRING,
CTRIT TYPE STRING,
SSRGM TYPE STRING,
CTTYP TYPE STRING,
PSION TYPE STRING,
BSAMT TYPE STRING,
ADCVR TYPE STRING,
PBAMT TYPE STRING,
PRCAT TYPE STRING,
PRCNP TYPE STRING,
PRPAR TYPE STRING,
PRSIT TYPE STRING,
AUSGR TYPE STRING,
SNAME TYPE STRING,
PRGRP TYPE STRING,
PRFUN TYPE STRING,
RGCOD TYPE STRING,
LMTLO TYPE STRING,
LMTHI TYPE STRING,
CVTBS TYPE STRING,
INCTV TYPE STRING,
SSDIS TYPE STRING,
PRERT TYPE STRING,
PRCOD TYPE STRING,
JUPER TYPE STRING,
FLD1 TYPE STRING,
FLD2 TYPE STRING,
FLD3 TYPE STRING,
FLD4 TYPE STRING,
FLD5 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2PA_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_PC2PA_STR-CNTR1 sy-vline 
WA_PC2PA_STR-BEGDA sy-vline 
WA_PC2PA_STR-ENDDA sy-vline 
WA_PC2PA_STR-BDATE sy-vline 
WA_PC2PA_STR-SSNUM sy-vline 
WA_PC2PA_STR-SSINS sy-vline 
WA_PC2PA_STR-SSDTE sy-vline 
WA_PC2PA_STR-CTRIT sy-vline 
WA_PC2PA_STR-SSRGM sy-vline 
WA_PC2PA_STR-CTTYP sy-vline 
WA_PC2PA_STR-PSION sy-vline 
WA_PC2PA_STR-BSAMT sy-vline 
WA_PC2PA_STR-ADCVR sy-vline 
WA_PC2PA_STR-PBAMT sy-vline 
WA_PC2PA_STR-PRCAT sy-vline 
WA_PC2PA_STR-PRCNP sy-vline 
WA_PC2PA_STR-PRPAR sy-vline 
WA_PC2PA_STR-PRSIT sy-vline 
WA_PC2PA_STR-AUSGR sy-vline 
WA_PC2PA_STR-SNAME sy-vline 
WA_PC2PA_STR-PRGRP sy-vline 
WA_PC2PA_STR-PRFUN sy-vline 
WA_PC2PA_STR-RGCOD sy-vline 
WA_PC2PA_STR-LMTLO sy-vline 
WA_PC2PA_STR-LMTHI sy-vline 
WA_PC2PA_STR-CVTBS sy-vline 
WA_PC2PA_STR-INCTV sy-vline 
WA_PC2PA_STR-SSDIS sy-vline 
WA_PC2PA_STR-PRERT sy-vline 
WA_PC2PA_STR-PRCOD sy-vline 
WA_PC2PA_STR-JUPER sy-vline 
WA_PC2PA_STR-FLD1 sy-vline 
WA_PC2PA_STR-FLD2 sy-vline 
WA_PC2PA_STR-FLD3 sy-vline 
WA_PC2PA_STR-FLD4 sy-vline 
WA_PC2PA_STR-FLD5 sy-vline      INTO ld_text SEPARATED BY SPACE.

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