ABAP Select data from SAP table PC20E into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC20E 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 PC20E. 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 PC20E 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_PC20E TYPE STANDARD TABLE OF PC20E,
      WA_PC20E TYPE PC20E,
      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: <PC20E> TYPE PC20E.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC20E.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC20E
  INTO TABLE IT_PC20E.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC20E
*  INTO TABLE @DATA(IT_PC20E2).
*--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_PC20E INDEX 1 INTO DATA(WA_PC20E2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC20E ASSIGNING <PC20E>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC20E>-ALZNR = 1.
<PC20E>-BEGDA = 1.
<PC20E>-ENDDA = 1.
<PC20E>-BEGUZ = 1.
<PC20E>-ENDUZ = 1.

ENDLOOP.

LOOP AT IT_PC20E INTO WA_PC20E.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC20E-ANZHL, sy-vline,
  WA_PC20E-ZEINH, sy-vline,
  WA_PC20E-BWGRL, sy-vline,
  WA_PC20E-OTYPE, sy-vline,
  WA_PC20E-PLANS, sy-vline,
  WA_PC20E-PRAKN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC20E 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_PC20E 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_PC20E INTO WA_PC20E.


*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_PC20E_STR, 
ALZNR TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
BEGUZ TYPE STRING,
ENDUZ TYPE STRING,
ANZHL TYPE STRING,
ZEINH TYPE STRING,
BWGRL TYPE STRING,
OTYPE TYPE STRING,
PLANS TYPE STRING,
PRAKN TYPE STRING,
PRAKZ TYPE STRING,
AUFKZ TYPE STRING,
BETRG TYPE STRING,
TRFGR TYPE STRING,
TRFST TYPE STRING,
VERSL TYPE STRING,
WAERS TYPE STRING,
WTART TYPE STRING,
START_BEF_ZERO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC20E_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_PC20E_STR-ALZNR sy-vline 
WA_PC20E_STR-BEGDA sy-vline 
WA_PC20E_STR-ENDDA sy-vline 
WA_PC20E_STR-BEGUZ sy-vline 
WA_PC20E_STR-ENDUZ sy-vline 
WA_PC20E_STR-ANZHL sy-vline 
WA_PC20E_STR-ZEINH sy-vline 
WA_PC20E_STR-BWGRL sy-vline 
WA_PC20E_STR-OTYPE sy-vline 
WA_PC20E_STR-PLANS sy-vline 
WA_PC20E_STR-PRAKN sy-vline 
WA_PC20E_STR-PRAKZ sy-vline 
WA_PC20E_STR-AUFKZ sy-vline 
WA_PC20E_STR-BETRG sy-vline 
WA_PC20E_STR-TRFGR sy-vline 
WA_PC20E_STR-TRFST sy-vline 
WA_PC20E_STR-VERSL sy-vline 
WA_PC20E_STR-WAERS sy-vline 
WA_PC20E_STR-WTART sy-vline 
WA_PC20E_STR-START_BEF_ZERO sy-vline      INTO ld_text SEPARATED BY SPACE.

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