ABAP Select data from SAP table PC22M into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PC22M 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 PC22M. 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 PC22M 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_PC22M TYPE STANDARD TABLE OF PC22M,
      WA_PC22M TYPE PC22M,
      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: <PC22M> TYPE PC22M.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PC22M.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PC22M
  INTO TABLE IT_PC22M.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PC22M
*  INTO TABLE @DATA(IT_PC22M2).
*--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_PC22M INDEX 1 INTO DATA(WA_PC22M2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PC22M ASSIGNING <PC22M>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PC22M>-BEGDA = 1.
<PC22M>-ENDDA = 1.
<PC22M>-TXNUM = 1.
<PC22M>-TXLET = 1.
<PC22M>-TXBAS = 1.

ENDLOOP.

LOOP AT IT_PC22M INTO WA_PC22M.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PC22M-TXRFS, sy-vline,
  WA_PC22M-TXSTK, sy-vline,
  WA_PC22M-P45PY_OLD, sy-vline,
  WA_PC22M-P45TX_OLD, sy-vline,
  WA_PC22M-TXWKN, sy-vline,
  WA_PC22M-TXMTN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PC22M 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_PC22M 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_PC22M INTO WA_PC22M.


*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_PC22M_STR, 
BEGDA TYPE STRING,
ENDDA TYPE STRING,
TXNUM TYPE STRING,
TXLET TYPE STRING,
TXBAS TYPE STRING,
TXRFS TYPE STRING,
TXSTK TYPE STRING,
P45PY_OLD TYPE STRING,
P45TX_OLD TYPE STRING,
TXWKN TYPE STRING,
TXMTN TYPE STRING,
CMTPY_OLD TYPE STRING,
CMTXP_OLD TYPE STRING,
TXREG TYPE STRING,
TXNMB TYPE STRING,
TXCOD TYPE STRING,
CUTXC TYPE STRING,
ADJAMT TYPE STRING,
ADJUST TYPE STRING,
MPT TYPE STRING,
MPTGRS TYPE STRING,
MPTTAX TYPE STRING,
CNTXC TYPE STRING,
P45PY TYPE STRING,
P45TX TYPE STRING,
CMTPY TYPE STRING,
CMTXP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PC22M_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_PC22M_STR-BEGDA sy-vline 
WA_PC22M_STR-ENDDA sy-vline 
WA_PC22M_STR-TXNUM sy-vline 
WA_PC22M_STR-TXLET sy-vline 
WA_PC22M_STR-TXBAS sy-vline 
WA_PC22M_STR-TXRFS sy-vline 
WA_PC22M_STR-TXSTK sy-vline 
WA_PC22M_STR-P45PY_OLD sy-vline 
WA_PC22M_STR-P45TX_OLD sy-vline 
WA_PC22M_STR-TXWKN sy-vline 
WA_PC22M_STR-TXMTN sy-vline 
WA_PC22M_STR-CMTPY_OLD sy-vline 
WA_PC22M_STR-CMTXP_OLD sy-vline 
WA_PC22M_STR-TXREG sy-vline 
WA_PC22M_STR-TXNMB sy-vline 
WA_PC22M_STR-TXCOD sy-vline 
WA_PC22M_STR-CUTXC sy-vline 
WA_PC22M_STR-ADJAMT sy-vline 
WA_PC22M_STR-ADJUST sy-vline 
WA_PC22M_STR-MPT sy-vline 
WA_PC22M_STR-MPTGRS sy-vline 
WA_PC22M_STR-MPTTAX sy-vline 
WA_PC22M_STR-CNTXC sy-vline 
WA_PC22M_STR-P45PY sy-vline 
WA_PC22M_STR-P45TX sy-vline 
WA_PC22M_STR-CMTPY sy-vline 
WA_PC22M_STR-CMTXP sy-vline      INTO ld_text SEPARATED BY SPACE.

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