ABAP Select data from SAP table PDCP1 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PDCP1 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 PDCP1. 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 PDCP1 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_PDCP1 TYPE STANDARD TABLE OF PDCP1,
      WA_PDCP1 TYPE PDCP1,
      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: <PDCP1> TYPE PDCP1.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PDCP1.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PDCP1
  INTO TABLE IT_PDCP1.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PDCP1
*  INTO TABLE @DATA(IT_PDCP12).
*--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_PDCP1 INDEX 1 INTO DATA(WA_PDCP12).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PDCP1 ASSIGNING <PDCP1>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PDCP1>-MANDANT = 1.
<PDCP1>-ZAUSW = 1.
<PDCP1>-PDATE = 1.
<PDCP1>-PTIME = 1.
<PDCP1>-ZAEHL = 1.

ENDLOOP.

LOOP AT IT_PDCP1 INTO WA_PDCP1.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PDCP1-LDATE, sy-vline,
  WA_PDCP1-LTIME, sy-vline,
  WA_PDCP1-TERID, sy-vline,
  WA_PDCP1-RETYP, sy-vline,
  WA_PDCP1-MELDA, sy-vline,
  WA_PDCP1-GCODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PDCP1 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_PDCP1 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_PDCP1 INTO WA_PDCP1.


*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_PDCP1_STR, 
MANDANT TYPE STRING,
ZAUSW TYPE STRING,
PDATE TYPE STRING,
PTIME TYPE STRING,
ZAEHL TYPE STRING,
LDATE TYPE STRING,
LTIME TYPE STRING,
TERID TYPE STRING,
RETYP TYPE STRING,
MELDA TYPE STRING,
GCODE TYPE STRING,
GRUNR TYPE STRING,
LGART TYPE STRING,
LOGRR TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
RESER TYPE STRING,
INDEF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PDCP1_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_PDCP1_STR-MANDANT sy-vline 
WA_PDCP1_STR-ZAUSW sy-vline 
WA_PDCP1_STR-PDATE sy-vline 
WA_PDCP1_STR-PTIME sy-vline 
WA_PDCP1_STR-ZAEHL sy-vline 
WA_PDCP1_STR-LDATE sy-vline 
WA_PDCP1_STR-LTIME sy-vline 
WA_PDCP1_STR-TERID sy-vline 
WA_PDCP1_STR-RETYP sy-vline 
WA_PDCP1_STR-MELDA sy-vline 
WA_PDCP1_STR-GCODE sy-vline 
WA_PDCP1_STR-GRUNR sy-vline 
WA_PDCP1_STR-LGART sy-vline 
WA_PDCP1_STR-LOGRR sy-vline 
WA_PDCP1_STR-BUKRS sy-vline 
WA_PDCP1_STR-WERKS sy-vline 
WA_PDCP1_STR-RESER sy-vline 
WA_PDCP1_STR-INDEF sy-vline      INTO ld_text SEPARATED BY SPACE.

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