ABAP Select data from SAP table PC23O_M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC23O_M 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 PC23O_M. 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 PC23O_M 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_PC23O_M TYPE STANDARD TABLE OF PC23O_M,
      WA_PC23O_M TYPE PC23O_M,
      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: <PC23O_M> TYPE PC23O_M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC23O_M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC23O_M
  INTO TABLE IT_PC23O_M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC23O_M
*  INTO TABLE @DATA(IT_PC23O_M2).
*--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_PC23O_M INDEX 1 INTO DATA(WA_PC23O_M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC23O_M ASSIGNING <PC23O_M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC23O_M>-PABRJ = 1.
<PC23O_M>-PABRP = 1.
<PC23O_M>-SEQNO = 1.
<PC23O_M>-CHKDT = 1.
<PC23O_M>-LGART = 1.

ENDLOOP.

LOOP AT IT_PC23O_M INTO WA_PC23O_M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC23O_M-BEGDA, sy-vline,
  WA_PC23O_M-ENDDA, sy-vline,
  WA_PC23O_M-FUNTY, sy-vline,
  WA_PC23O_M-MBASE, sy-vline,
  WA_PC23O_M-FURTE, sy-vline,
  WA_PC23O_M-MCONT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC23O_M 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_PC23O_M 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_PC23O_M INTO WA_PC23O_M.


*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.

*Conversion exit GJAHR, internal->external for field PABRJ
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_PC23O_M-PABRJ
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PC23O_M-PABRJ.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_PC23O_M_STR, 
PABRJ TYPE STRING,
PABRP TYPE STRING,
SEQNO TYPE STRING,
CHKDT TYPE STRING,
LGART TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
FUNTY TYPE STRING,
MBASE TYPE STRING,
FURTE TYPE STRING,
MCONT TYPE STRING,
HITYP TYPE STRING,
HIRTE TYPE STRING,
GRSAL TYPE STRING,
PAYTY TYPE STRING,
SPBON TYPE STRING,
RAMT1 TYPE STRING,
RAMT2 TYPE STRING,
RCHA1 TYPE STRING,
RCHA2 TYPE STRING,
RCHA3 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC23O_M_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_PC23O_M_STR-PABRJ sy-vline 
WA_PC23O_M_STR-PABRP sy-vline 
WA_PC23O_M_STR-SEQNO sy-vline 
WA_PC23O_M_STR-CHKDT sy-vline 
WA_PC23O_M_STR-LGART sy-vline 
WA_PC23O_M_STR-BEGDA sy-vline 
WA_PC23O_M_STR-ENDDA sy-vline 
WA_PC23O_M_STR-FUNTY sy-vline 
WA_PC23O_M_STR-MBASE sy-vline 
WA_PC23O_M_STR-FURTE sy-vline 
WA_PC23O_M_STR-MCONT sy-vline 
WA_PC23O_M_STR-HITYP sy-vline 
WA_PC23O_M_STR-HIRTE sy-vline 
WA_PC23O_M_STR-GRSAL sy-vline 
WA_PC23O_M_STR-PAYTY sy-vline 
WA_PC23O_M_STR-SPBON sy-vline 
WA_PC23O_M_STR-RAMT1 sy-vline 
WA_PC23O_M_STR-RAMT2 sy-vline 
WA_PC23O_M_STR-RCHA1 sy-vline 
WA_PC23O_M_STR-RCHA2 sy-vline 
WA_PC23O_M_STR-RCHA3 sy-vline      INTO ld_text SEPARATED BY SPACE.

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