ABAP Select data from SAP table PC2D4 into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC2D4 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 PC2D4. 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 PC2D4 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_PC2D4 TYPE STANDARD TABLE OF PC2D4,
      WA_PC2D4 TYPE PC2D4,
      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: <PC2D4> TYPE PC2D4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC2D4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC2D4
  INTO TABLE IT_PC2D4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC2D4
*  INTO TABLE @DATA(IT_PC2D42).
*--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_PC2D4 INDEX 1 INTO DATA(WA_PC2D42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC2D4 ASSIGNING <PC2D4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC2D4>-NUMCI = 1.
<PC2D4>-APZNR = 1.
<PC2D4>-ENDDA = 1.
<PC2D4>-BEGDA = 1.
<PC2D4>-SUBTY = 1.

ENDLOOP.

LOOP AT IT_PC2D4 INTO WA_PC2D4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC2D4-CIPID, sy-vline,
  WA_PC2D4-ALSGR, sy-vline,
  WA_PC2D4-ALLGA, sy-vline,
  WA_PC2D4-ALBET, sy-vline,
  WA_PC2D4-DBNOT, sy-vline,
  WA_PC2D4-FPDAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC2D4 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_PC2D4 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_PC2D4 INTO WA_PC2D4.


*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_PC2D4_STR, 
NUMCI TYPE STRING,
APZNR TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SUBTY TYPE STRING,
CIPID TYPE STRING,
ALSGR TYPE STRING,
ALLGA TYPE STRING,
ALBET TYPE STRING,
DBNOT TYPE STRING,
FPDAT TYPE STRING,
FPAGE TYPE STRING,
NUMMO TYPE STRING,
BEGPC TYPE STRING,
NACEC TYPE STRING,
RSZCA TYPE STRING,
RSZKN TYPE STRING,
BEGGH TYPE STRING,
ERNID TYPE STRING,
HTIND TYPE STRING,
RPLEE TYPE STRING,
SEREX TYPE STRING,
AGTYP TYPE STRING,
RECON TYPE STRING,
NOTDT TYPE STRING,
AILRE TYPE STRING,
AKBEG TYPE STRING,
AKEND TYPE STRING,
PYTYP TYPE STRING,
REWOR TYPE STRING,
MLERD TYPE STRING,
ETQSP TYPE STRING,
ADNOT TYPE STRING,
INJUS TYPE STRING,
PYLGA TYPE STRING,
PYBET TYPE STRING,
WAERS TYPE STRING,
AGRDT TYPE STRING,
PRCLV TYPE STRING,
PLPAP TYPE STRING,
REINP TYPE STRING,
CINOM TYPE STRING,
PAYAM TYPE STRING,
PAYLG TYPE STRING,
C1ZNR TYPE STRING,
SIOVW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC2D4_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_PC2D4_STR-NUMCI sy-vline 
WA_PC2D4_STR-APZNR sy-vline 
WA_PC2D4_STR-ENDDA sy-vline 
WA_PC2D4_STR-BEGDA sy-vline 
WA_PC2D4_STR-SUBTY sy-vline 
WA_PC2D4_STR-CIPID sy-vline 
WA_PC2D4_STR-ALSGR sy-vline 
WA_PC2D4_STR-ALLGA sy-vline 
WA_PC2D4_STR-ALBET sy-vline 
WA_PC2D4_STR-DBNOT sy-vline 
WA_PC2D4_STR-FPDAT sy-vline 
WA_PC2D4_STR-FPAGE sy-vline 
WA_PC2D4_STR-NUMMO sy-vline 
WA_PC2D4_STR-BEGPC sy-vline 
WA_PC2D4_STR-NACEC sy-vline 
WA_PC2D4_STR-RSZCA sy-vline 
WA_PC2D4_STR-RSZKN sy-vline 
WA_PC2D4_STR-BEGGH sy-vline 
WA_PC2D4_STR-ERNID sy-vline 
WA_PC2D4_STR-HTIND sy-vline 
WA_PC2D4_STR-RPLEE sy-vline 
WA_PC2D4_STR-SEREX sy-vline 
WA_PC2D4_STR-AGTYP sy-vline 
WA_PC2D4_STR-RECON sy-vline 
WA_PC2D4_STR-NOTDT sy-vline 
WA_PC2D4_STR-AILRE sy-vline 
WA_PC2D4_STR-AKBEG sy-vline 
WA_PC2D4_STR-AKEND sy-vline 
WA_PC2D4_STR-PYTYP sy-vline 
WA_PC2D4_STR-REWOR sy-vline 
WA_PC2D4_STR-MLERD sy-vline 
WA_PC2D4_STR-ETQSP sy-vline 
WA_PC2D4_STR-ADNOT sy-vline 
WA_PC2D4_STR-INJUS sy-vline 
WA_PC2D4_STR-PYLGA sy-vline 
WA_PC2D4_STR-PYBET sy-vline 
WA_PC2D4_STR-WAERS sy-vline 
WA_PC2D4_STR-AGRDT sy-vline 
WA_PC2D4_STR-PRCLV sy-vline 
WA_PC2D4_STR-PLPAP sy-vline 
WA_PC2D4_STR-REINP sy-vline 
WA_PC2D4_STR-CINOM sy-vline 
WA_PC2D4_STR-PAYAM sy-vline 
WA_PC2D4_STR-PAYLG sy-vline 
WA_PC2D4_STR-C1ZNR sy-vline 
WA_PC2D4_STR-SIOVW sy-vline      INTO ld_text SEPARATED BY SPACE.

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