ABAP Select data from SAP table P0546 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0546 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 P0546. 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 P0546 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_P0546 TYPE STANDARD TABLE OF P0546,
      WA_P0546 TYPE P0546,
      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: <P0546> TYPE P0546.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0546.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0546
  INTO TABLE IT_P0546.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0546
*  INTO TABLE @DATA(IT_P05462).
*--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_P0546 INDEX 1 INTO DATA(WA_P05462).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0546 ASSIGNING <P0546>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0546>-PERNR = 1.
<P0546>-INFTY = 1.
<P0546>-SUBTY = 1.
<P0546>-OBJPS = 1.
<P0546>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0546 INTO WA_P0546.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0546-ENDDA, sy-vline,
  WA_P0546-BEGDA, sy-vline,
  WA_P0546-SEQNR, sy-vline,
  WA_P0546-AEDTM, sy-vline,
  WA_P0546-UNAME, sy-vline,
  WA_P0546-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0546 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_P0546 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_P0546 INTO WA_P0546.


*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_P0546_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,
ARRDT TYPE STRING,
RSGDT TYPE STRING,
LSGDT TYPE STRING,
I21DT TYPE STRING,
IRADT TYPE STRING,
RSNOT TYPE STRING,
BSAMT TYPE STRING,
RSMON TYPE STRING,
NMNER TYPE STRING,
TLNER TYPE STRING,
NMPER TYPE STRING,
TLPER TYPE STRING,
PRIDT TYPE STRING,
PYRDT TYPE STRING,
PPYDT TYPE STRING,
STFLG TYPE STRING,
AMEND TYPE STRING,
LTSNR TYPE STRING,
PTSNR TYPE STRING,
CHMON TYPE STRING,
RSBAS TYPE STRING,
SNABS TYPE STRING,
SNIMM TYPE STRING,
SNRES TYPE STRING,
SNOTR TYPE STRING,
NWREG TYPE STRING,
NWSAL TYPE STRING,
NWLEV TYPE STRING,
NWOWE TYPE STRING,
NWOTR TYPE STRING,
INEPT TYPE STRING,
OSINC TYPE STRING,
BSPAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0546_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_P0546_STR-PERNR sy-vline 
WA_P0546_STR-INFTY sy-vline 
WA_P0546_STR-SUBTY sy-vline 
WA_P0546_STR-OBJPS sy-vline 
WA_P0546_STR-SPRPS sy-vline 
WA_P0546_STR-ENDDA sy-vline 
WA_P0546_STR-BEGDA sy-vline 
WA_P0546_STR-SEQNR sy-vline 
WA_P0546_STR-AEDTM sy-vline 
WA_P0546_STR-UNAME sy-vline 
WA_P0546_STR-HISTO sy-vline 
WA_P0546_STR-ITXEX sy-vline 
WA_P0546_STR-REFEX sy-vline 
WA_P0546_STR-ORDEX sy-vline 
WA_P0546_STR-ITBLD sy-vline 
WA_P0546_STR-PREAS sy-vline 
WA_P0546_STR-FLAG1 sy-vline 
WA_P0546_STR-FLAG2 sy-vline 
WA_P0546_STR-FLAG3 sy-vline 
WA_P0546_STR-FLAG4 sy-vline 
WA_P0546_STR-RESE1 sy-vline 
WA_P0546_STR-RESE2 sy-vline 
WA_P0546_STR-GRPVL sy-vline 
WA_P0546_STR-ARRDT sy-vline 
WA_P0546_STR-RSGDT sy-vline 
WA_P0546_STR-LSGDT sy-vline 
WA_P0546_STR-I21DT sy-vline 
WA_P0546_STR-IRADT sy-vline 
WA_P0546_STR-RSNOT sy-vline 
WA_P0546_STR-BSAMT sy-vline 
WA_P0546_STR-RSMON sy-vline 
WA_P0546_STR-NMNER sy-vline 
WA_P0546_STR-TLNER sy-vline 
WA_P0546_STR-NMPER sy-vline 
WA_P0546_STR-TLPER sy-vline 
WA_P0546_STR-PRIDT sy-vline 
WA_P0546_STR-PYRDT sy-vline 
WA_P0546_STR-PPYDT sy-vline 
WA_P0546_STR-STFLG sy-vline 
WA_P0546_STR-AMEND sy-vline 
WA_P0546_STR-LTSNR sy-vline 
WA_P0546_STR-PTSNR sy-vline 
WA_P0546_STR-CHMON sy-vline 
WA_P0546_STR-RSBAS sy-vline 
WA_P0546_STR-SNABS sy-vline 
WA_P0546_STR-SNIMM sy-vline 
WA_P0546_STR-SNRES sy-vline 
WA_P0546_STR-SNOTR sy-vline 
WA_P0546_STR-NWREG sy-vline 
WA_P0546_STR-NWSAL sy-vline 
WA_P0546_STR-NWLEV sy-vline 
WA_P0546_STR-NWOWE sy-vline 
WA_P0546_STR-NWOTR sy-vline 
WA_P0546_STR-INEPT sy-vline 
WA_P0546_STR-OSINC sy-vline 
WA_P0546_STR-BSPAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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