ABAP Select data from SAP table PC23L into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC23L 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 PC23L. 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 PC23L 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_PC23L TYPE STANDARD TABLE OF PC23L,
      WA_PC23L TYPE PC23L,
      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: <PC23L> TYPE PC23L.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC23L.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC23L
  INTO TABLE IT_PC23L.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC23L
*  INTO TABLE @DATA(IT_PC23L2).
*--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_PC23L INDEX 1 INTO DATA(WA_PC23L2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC23L ASSIGNING <PC23L>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC23L>-FCODE = 1.
<PC23L>-ENDDA = 1.
<PC23L>-BEGDA = 1.
<PC23L>-SEQNR = 1.
<PC23L>-CNTR1 = 1.

ENDLOOP.

LOOP AT IT_PC23L INTO WA_PC23L.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC23L-DPERC, sy-vline,
  WA_PC23L-CONAM, sy-vline,
  WA_PC23L-EXCLF, sy-vline,
  WA_PC23L-SUPSC, sy-vline,
  WA_PC23L-SUPES, sy-vline,
  WA_PC23L-EMPCN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC23L 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_PC23L 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_PC23L INTO WA_PC23L.


*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_PC23L_STR, 
FCODE TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
CNTR1 TYPE STRING,
DPERC TYPE STRING,
CONAM TYPE STRING,
EXCLF TYPE STRING,
SUPSC TYPE STRING,
SUPES TYPE STRING,
EMPCN TYPE STRING,
EMPAM TYPE STRING,
MEMNO TYPE STRING,
MESSG TYPE STRING,
SUPFR TYPE STRING,
COMFR TYPE STRING,
EMPFR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC23L_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_PC23L_STR-FCODE sy-vline 
WA_PC23L_STR-ENDDA sy-vline 
WA_PC23L_STR-BEGDA sy-vline 
WA_PC23L_STR-SEQNR sy-vline 
WA_PC23L_STR-CNTR1 sy-vline 
WA_PC23L_STR-DPERC sy-vline 
WA_PC23L_STR-CONAM sy-vline 
WA_PC23L_STR-EXCLF sy-vline 
WA_PC23L_STR-SUPSC sy-vline 
WA_PC23L_STR-SUPES sy-vline 
WA_PC23L_STR-EMPCN sy-vline 
WA_PC23L_STR-EMPAM sy-vline 
WA_PC23L_STR-MEMNO sy-vline 
WA_PC23L_STR-MESSG sy-vline 
WA_PC23L_STR-SUPFR sy-vline 
WA_PC23L_STR-COMFR sy-vline 
WA_PC23L_STR-EMPFR sy-vline      INTO ld_text SEPARATED BY SPACE.

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