ABAP Select data from SAP table PDCP4 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PDCP4 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 PDCP4. 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 PDCP4 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_PDCP4 TYPE STANDARD TABLE OF PDCP4,
      WA_PDCP4 TYPE PDCP4,
      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: <PDCP4> TYPE PDCP4.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PDCP4.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PDCP4
  INTO TABLE IT_PDCP4.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PDCP4
*  INTO TABLE @DATA(IT_PDCP42).
*--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_PDCP4 INDEX 1 INTO DATA(WA_PDCP42).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PDCP4 ASSIGNING <PDCP4>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PDCP4>-MANDT = 1.
<PDCP4>-PDATE = 1.
<PDCP4>-PTIME = 1.
<PDCP4>-TERID = 1.
<PDCP4>-MELDA = 1.

ENDLOOP.

LOOP AT IT_PDCP4 INTO WA_PDCP4.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PDCP4-RETYP, sy-vline,
  WA_PDCP4-ZAEHL, sy-vline,
  WA_PDCP4-BUKRS, sy-vline,
  WA_PDCP4-WERKS, sy-vline,
  WA_PDCP4-ARLEI, sy-vline,
  WA_PDCP4-ARBPL, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PDCP4 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_PDCP4 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_PDCP4 INTO WA_PDCP4.


*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_PDCP4_STR, 
MANDT TYPE STRING,
PDATE TYPE STRING,
PTIME TYPE STRING,
TERID TYPE STRING,
MELDA TYPE STRING,
RETYP TYPE STRING,
ZAEHL TYPE STRING,
BUKRS TYPE STRING,
WERKS TYPE STRING,
ARLEI TYPE STRING,
ARBPL TYPE STRING,
PLEIN TYPE STRING,
AUSWE TYPE STRING,
RUKNR TYPE STRING,
AUFSP TYPE STRING,
AVOSP TYPE STRING,
BLART TYPE STRING,
ZBHAI TYPE STRING,
ZMHAI TYPE STRING,
ZRUSI TYPE STRING,
MENGE TYPE STRING,
XMNGA TYPE STRING,
AVOME TYPE STRING,
DGRUN TYPE STRING,
AGRUN TYPE STRING,
UGRUN TYPE STRING,
SGRUN TYPE STRING,
KTEXT TYPE STRING,
GRPNR TYPE STRING,
QUALF TYPE STRING,
LOGRP TYPE STRING,
LOART TYPE STRING,
DATUB TYPE STRING,
ZEIBE TYPE STRING,
DATUE TYPE STRING,
ZEIEN TYPE STRING,
DAUER TYPE STRING,
ZEINH TYPE STRING,
IDNRA TYPE STRING,
LGPLA TYPE STRING,
ENDRM TYPE STRING,
AEDAT TYPE STRING,
AENAM TYPE STRING,
FLAGV TYPE STRING,
AKTRM TYPE STRING,
RESER TYPE STRING,
INDEF TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PDCP4_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_PDCP4_STR-MANDT sy-vline 
WA_PDCP4_STR-PDATE sy-vline 
WA_PDCP4_STR-PTIME sy-vline 
WA_PDCP4_STR-TERID sy-vline 
WA_PDCP4_STR-MELDA sy-vline 
WA_PDCP4_STR-RETYP sy-vline 
WA_PDCP4_STR-ZAEHL sy-vline 
WA_PDCP4_STR-BUKRS sy-vline 
WA_PDCP4_STR-WERKS sy-vline 
WA_PDCP4_STR-ARLEI sy-vline 
WA_PDCP4_STR-ARBPL sy-vline 
WA_PDCP4_STR-PLEIN sy-vline 
WA_PDCP4_STR-AUSWE sy-vline 
WA_PDCP4_STR-RUKNR sy-vline 
WA_PDCP4_STR-AUFSP sy-vline 
WA_PDCP4_STR-AVOSP sy-vline 
WA_PDCP4_STR-BLART sy-vline 
WA_PDCP4_STR-ZBHAI sy-vline 
WA_PDCP4_STR-ZMHAI sy-vline 
WA_PDCP4_STR-ZRUSI sy-vline 
WA_PDCP4_STR-MENGE sy-vline 
WA_PDCP4_STR-XMNGA sy-vline 
WA_PDCP4_STR-AVOME sy-vline 
WA_PDCP4_STR-DGRUN sy-vline 
WA_PDCP4_STR-AGRUN sy-vline 
WA_PDCP4_STR-UGRUN sy-vline 
WA_PDCP4_STR-SGRUN sy-vline 
WA_PDCP4_STR-KTEXT sy-vline 
WA_PDCP4_STR-GRPNR sy-vline 
WA_PDCP4_STR-QUALF sy-vline 
WA_PDCP4_STR-LOGRP sy-vline 
WA_PDCP4_STR-LOART sy-vline 
WA_PDCP4_STR-DATUB sy-vline 
WA_PDCP4_STR-ZEIBE sy-vline 
WA_PDCP4_STR-DATUE sy-vline 
WA_PDCP4_STR-ZEIEN sy-vline 
WA_PDCP4_STR-DAUER sy-vline 
WA_PDCP4_STR-ZEINH sy-vline 
WA_PDCP4_STR-IDNRA sy-vline 
WA_PDCP4_STR-LGPLA sy-vline 
WA_PDCP4_STR-ENDRM sy-vline 
WA_PDCP4_STR-AEDAT sy-vline 
WA_PDCP4_STR-AENAM sy-vline 
WA_PDCP4_STR-FLAGV sy-vline 
WA_PDCP4_STR-AKTRM sy-vline 
WA_PDCP4_STR-RESER sy-vline 
WA_PDCP4_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.