ABAP Select data from SAP table P0541 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0541 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 P0541. 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 P0541 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_P0541 TYPE STANDARD TABLE OF P0541,
      WA_P0541 TYPE P0541,
      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: <P0541> TYPE P0541.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0541.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0541
  INTO TABLE IT_P0541.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0541
*  INTO TABLE @DATA(IT_P05412).
*--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_P0541 INDEX 1 INTO DATA(WA_P05412).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0541 ASSIGNING <P0541>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0541>-PERNR = 1.
<P0541>-INFTY = 1.
<P0541>-SUBTY = 1.
<P0541>-OBJPS = 1.
<P0541>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0541 INTO WA_P0541.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0541-ENDDA, sy-vline,
  WA_P0541-BEGDA, sy-vline,
  WA_P0541-SEQNR, sy-vline,
  WA_P0541-AEDTM, sy-vline,
  WA_P0541-UNAME, sy-vline,
  WA_P0541-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0541 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_P0541 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_P0541 INTO WA_P0541.


*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_P0541_STR, 
PERNR TYPE STRING,
INFTY TYPE STRING,
SUBTY TYPE STRING,
OBJPS TYPE STRING,
SPRPS TYPE STRING,
ENDDA TYPE STRING,
BEGDA TYPE STRING,
SEQNR TYPE STRING,
AEDTM TYPE STRING,
UNAME TYPE STRING,
HISTO TYPE STRING,
ITXEX TYPE STRING,
REFEX TYPE STRING,
ORDEX TYPE STRING,
ITBLD TYPE STRING,
PREAS TYPE STRING,
FLAG1 TYPE STRING,
FLAG2 TYPE STRING,
FLAG3 TYPE STRING,
FLAG4 TYPE STRING,
RESE1 TYPE STRING,
RESE2 TYPE STRING,
GRPVL TYPE STRING,
NTXFC TYPE STRING,
FRYEA TYPE STRING,
RSNOT TYPE STRING,
FLDEG TYPE STRING,
HNDEE TYPE STRING,
WOMEE TYPE STRING,
REFID TYPE STRING,
RECFR TYPE STRING,
SUBFR TYPE STRING,
PRODU TYPE STRING,
OPTIO TYPE STRING,
FRNMN TYPE STRING,
YNGEE TYPE STRING,
EMBEG TYPE STRING,
EMEND TYPE STRING,
HNDCD TYPE STRING,
SIGPR TYPE STRING,
ITPCT TYPE STRING,
HNBEG TYPE STRING,
HNEND TYPE STRING,
DSPCH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0541_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_P0541_STR-PERNR sy-vline 
WA_P0541_STR-INFTY sy-vline 
WA_P0541_STR-SUBTY sy-vline 
WA_P0541_STR-OBJPS sy-vline 
WA_P0541_STR-SPRPS sy-vline 
WA_P0541_STR-ENDDA sy-vline 
WA_P0541_STR-BEGDA sy-vline 
WA_P0541_STR-SEQNR sy-vline 
WA_P0541_STR-AEDTM sy-vline 
WA_P0541_STR-UNAME sy-vline 
WA_P0541_STR-HISTO sy-vline 
WA_P0541_STR-ITXEX sy-vline 
WA_P0541_STR-REFEX sy-vline 
WA_P0541_STR-ORDEX sy-vline 
WA_P0541_STR-ITBLD sy-vline 
WA_P0541_STR-PREAS sy-vline 
WA_P0541_STR-FLAG1 sy-vline 
WA_P0541_STR-FLAG2 sy-vline 
WA_P0541_STR-FLAG3 sy-vline 
WA_P0541_STR-FLAG4 sy-vline 
WA_P0541_STR-RESE1 sy-vline 
WA_P0541_STR-RESE2 sy-vline 
WA_P0541_STR-GRPVL sy-vline 
WA_P0541_STR-NTXFC sy-vline 
WA_P0541_STR-FRYEA sy-vline 
WA_P0541_STR-RSNOT sy-vline 
WA_P0541_STR-FLDEG sy-vline 
WA_P0541_STR-HNDEE sy-vline 
WA_P0541_STR-WOMEE sy-vline 
WA_P0541_STR-REFID sy-vline 
WA_P0541_STR-RECFR sy-vline 
WA_P0541_STR-SUBFR sy-vline 
WA_P0541_STR-PRODU sy-vline 
WA_P0541_STR-OPTIO sy-vline 
WA_P0541_STR-FRNMN sy-vline 
WA_P0541_STR-YNGEE sy-vline 
WA_P0541_STR-EMBEG sy-vline 
WA_P0541_STR-EMEND sy-vline 
WA_P0541_STR-HNDCD sy-vline 
WA_P0541_STR-SIGPR sy-vline 
WA_P0541_STR-ITPCT sy-vline 
WA_P0541_STR-HNBEG sy-vline 
WA_P0541_STR-HNEND sy-vline 
WA_P0541_STR-DSPCH sy-vline      INTO ld_text SEPARATED BY SPACE.

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