ABAP Select data from SAP table P21_PS_OKM_MUNKAREND into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P21_PS_OKM_MUNKAREND 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 P21_PS_OKM_MUNKAREND. 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 P21_PS_OKM_MUNKAREND 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_P21_PS_OKM_MUNKAREND TYPE STANDARD TABLE OF P21_PS_OKM_MUNKAREND,
      WA_P21_PS_OKM_MUNKAREND TYPE P21_PS_OKM_MUNKAREND,
      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: <P21_PS_OKM_MUNKAREND> TYPE P21_PS_OKM_MUNKAREND.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P21_PS_OKM_MUNKAREND.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P21_PS_OKM_MUNKAREND
  INTO TABLE IT_P21_PS_OKM_MUNKAREND.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P21_PS_OKM_MUNKAREND
*  INTO TABLE @DATA(IT_P21_PS_OKM_MUNKAREND2).
*--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_P21_PS_OKM_MUNKAREND INDEX 1 INTO DATA(WA_P21_PS_OKM_MUNKAREND2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P21_PS_OKM_MUNKAREND ASSIGNING <P21_PS_OKM_MUNKAREND>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P21_PS_OKM_MUNKAREND>-PERNR = 1.
<P21_PS_OKM_MUNKAREND>-ENAME = 1.
<P21_PS_OKM_MUNKAREND>-BEGDA = 1.
<P21_PS_OKM_MUNKAREND>-ENDDA = 1.
<P21_PS_OKM_MUNKAREND>-SCHKZ = 1.

ENDLOOP.

LOOP AT IT_P21_PS_OKM_MUNKAREND INTO WA_P21_PS_OKM_MUNKAREND.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P21_PS_OKM_MUNKAREND-ZTERF, sy-vline,
  WA_P21_PS_OKM_MUNKAREND-EMPCT, sy-vline,
  WA_P21_PS_OKM_MUNKAREND-MOSTD, sy-vline,
  WA_P21_PS_OKM_MUNKAREND-WOSTD, sy-vline,
  WA_P21_PS_OKM_MUNKAREND-ARBST, sy-vline,
  WA_P21_PS_OKM_MUNKAREND-WKWDY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P21_PS_OKM_MUNKAREND 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_P21_PS_OKM_MUNKAREND 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_P21_PS_OKM_MUNKAREND INTO WA_P21_PS_OKM_MUNKAREND.


*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_P21_PS_OKM_MUNKAREND_STR, 
PERNR TYPE STRING,
ENAME TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SCHKZ TYPE STRING,
ZTERF TYPE STRING,
EMPCT TYPE STRING,
MOSTD TYPE STRING,
WOSTD TYPE STRING,
ARBST TYPE STRING,
WKWDY TYPE STRING,
JRSTD TYPE STRING,
TEILK TYPE STRING,
MINTA TYPE STRING,
MAXTA TYPE STRING,
MINWO TYPE STRING,
MAXWO TYPE STRING,
MINMO TYPE STRING,
MAXMO TYPE STRING,
MINJA TYPE STRING,
MAXJA TYPE STRING,
DYSCH TYPE STRING,
KZTIM TYPE STRING,
WWEEK TYPE STRING,
AWTYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P21_PS_OKM_MUNKAREND_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_P21_PS_OKM_MUNKAREND_STR-PERNR sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-ENAME sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-BEGDA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-ENDDA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-SCHKZ sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-ZTERF sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-EMPCT sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MOSTD sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-WOSTD sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-ARBST sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-WKWDY sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-JRSTD sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-TEILK sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MINTA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MAXTA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MINWO sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MAXWO sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MINMO sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MAXMO sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MINJA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-MAXJA sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-DYSCH sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-KZTIM sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-WWEEK sy-vline 
WA_P21_PS_OKM_MUNKAREND_STR-AWTYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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