ABAP Select data from SAP table PC13P into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC13P 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 PC13P. 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 PC13P 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_PC13P TYPE STANDARD TABLE OF PC13P,
      WA_PC13P TYPE PC13P,
      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: <PC13P> TYPE PC13P.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC13P.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC13P
  INTO TABLE IT_PC13P.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC13P
*  INTO TABLE @DATA(IT_PC13P2).
*--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_PC13P INDEX 1 INTO DATA(WA_PC13P2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC13P ASSIGNING <PC13P>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC13P>-LGART = 1.
<PC13P>-BEGDA = 1.
<PC13P>-ENDDA = 1.
<PC13P>-SEQNR = 1.
<PC13P>-ZUORD = 1.

ENDLOOP.

LOOP AT IT_PC13P INTO WA_PC13P.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC13P-ANZHL, sy-vline,
  WA_PC13P-ZEINH, sy-vline,
  WA_PC13P-KTART, sy-vline,
  WA_PC13P-QUONR, sy-vline,
  WA_PC13P-BETPE, sy-vline,
  WA_PC13P-BETRG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC13P 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_PC13P 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_PC13P INTO WA_PC13P.


*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_PC13P_STR, 
LGART TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SEQNR TYPE STRING,
ZUORD TYPE STRING,
ANZHL TYPE STRING,
ZEINH TYPE STRING,
KTART TYPE STRING,
QUONR TYPE STRING,
BETPE TYPE STRING,
BETRG TYPE STRING,
BLBEG TYPE STRING,
RINST TYPE STRING,
PRORT TYPE STRING,
INSTA TYPE STRING,
BLEND TYPE STRING,
VALWG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC13P_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_PC13P_STR-LGART sy-vline 
WA_PC13P_STR-BEGDA sy-vline 
WA_PC13P_STR-ENDDA sy-vline 
WA_PC13P_STR-SEQNR sy-vline 
WA_PC13P_STR-ZUORD sy-vline 
WA_PC13P_STR-ANZHL sy-vline 
WA_PC13P_STR-ZEINH sy-vline 
WA_PC13P_STR-KTART sy-vline 
WA_PC13P_STR-QUONR sy-vline 
WA_PC13P_STR-BETPE sy-vline 
WA_PC13P_STR-BETRG sy-vline 
WA_PC13P_STR-BLBEG sy-vline 
WA_PC13P_STR-RINST sy-vline 
WA_PC13P_STR-PRORT sy-vline 
WA_PC13P_STR-INSTA sy-vline 
WA_PC13P_STR-BLEND sy-vline 
WA_PC13P_STR-VALWG sy-vline      INTO ld_text SEPARATED BY SPACE.

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