ABAP Select data from SAP table P0442 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0442 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 P0442. 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 P0442 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_P0442 TYPE STANDARD TABLE OF P0442,
      WA_P0442 TYPE P0442,
      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: <P0442> TYPE P0442.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0442.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0442
  INTO TABLE IT_P0442.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0442
*  INTO TABLE @DATA(IT_P04422).
*--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_P0442 INDEX 1 INTO DATA(WA_P04422).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0442 ASSIGNING <P0442>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0442>-PERNR = 1.
<P0442>-INFTY = 1.
<P0442>-SUBTY = 1.
<P0442>-OBJPS = 1.
<P0442>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0442 INTO WA_P0442.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0442-ENDDA, sy-vline,
  WA_P0442-BEGDA, sy-vline,
  WA_P0442-SEQNR, sy-vline,
  WA_P0442-AEDTM, sy-vline,
  WA_P0442-UNAME, sy-vline,
  WA_P0442-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0442 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_P0442 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_P0442 INTO WA_P0442.


*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_P0442_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,
RGNDA TYPE STRING,
BUYDA TYPE STRING,
FACTO TYPE STRING,
MODEL TYPE STRING,
REGNO TYPE STRING,
ASTNO TYPE STRING,
REASN TYPE STRING,
FREEM TYPE STRING,
INSUR TYPE STRING,
INCFL TYPE STRING,
PRVDR TYPE STRING,
DUTDR TYPE STRING,
LISTP TYPE STRING,
DSCNT TYPE STRING,
ACCSS TYPE STRING,
PAIDP TYPE STRING,
ONEPD TYPE STRING,
REGPD TYPE STRING,
BNFTV TYPE STRING,
CRNCY TYPE STRING,
RANGE TYPE STRING,
DSTNC TYPE STRING,
DSTN2 TYPE STRING,
CALCB TYPE STRING,
CARRG TYPE STRING,
MNTRL TYPE STRING,
PAYMO TYPE STRING,
CCSSC TYPE STRING,
TTYPE TYPE STRING,
DPLAN TYPE STRING,
ADDAC TYPE STRING,
FUELR TYPE STRING,
UAVAL TYPE STRING,
VEHCL TYPE STRING,
CO2EM TYPE STRING,
CVPSH TYPE STRING,
CVFSH TYPE STRING,
POLLC TYPE STRING,
LEASC TYPE STRING,
CMPID TYPE STRING,
P46CDT TYPE STRING,
P46CID TYPE STRING,
TOTDS TYPE STRING,
VAN_EMISSION TYPE STRING,
NPBIK TYPE STRING,
SLSAC TYPE STRING,
FSLSC TYPE STRING,
NOXVL TYPE STRING,
CWLTP TYPE STRING,
EMVAZ TYPE STRING,
ACO2E TYPE STRING,
CCVIN TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0442_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_P0442_STR-PERNR sy-vline 
WA_P0442_STR-INFTY sy-vline 
WA_P0442_STR-SUBTY sy-vline 
WA_P0442_STR-OBJPS sy-vline 
WA_P0442_STR-SPRPS sy-vline 
WA_P0442_STR-ENDDA sy-vline 
WA_P0442_STR-BEGDA sy-vline 
WA_P0442_STR-SEQNR sy-vline 
WA_P0442_STR-AEDTM sy-vline 
WA_P0442_STR-UNAME sy-vline 
WA_P0442_STR-HISTO sy-vline 
WA_P0442_STR-ITXEX sy-vline 
WA_P0442_STR-REFEX sy-vline 
WA_P0442_STR-ORDEX sy-vline 
WA_P0442_STR-ITBLD sy-vline 
WA_P0442_STR-PREAS sy-vline 
WA_P0442_STR-FLAG1 sy-vline 
WA_P0442_STR-FLAG2 sy-vline 
WA_P0442_STR-FLAG3 sy-vline 
WA_P0442_STR-FLAG4 sy-vline 
WA_P0442_STR-RESE1 sy-vline 
WA_P0442_STR-RESE2 sy-vline 
WA_P0442_STR-GRPVL sy-vline 
WA_P0442_STR-RGNDA sy-vline 
WA_P0442_STR-BUYDA sy-vline 
WA_P0442_STR-FACTO sy-vline 
WA_P0442_STR-MODEL sy-vline 
WA_P0442_STR-REGNO sy-vline 
WA_P0442_STR-ASTNO sy-vline 
WA_P0442_STR-REASN sy-vline 
WA_P0442_STR-FREEM sy-vline 
WA_P0442_STR-INSUR sy-vline 
WA_P0442_STR-INCFL sy-vline 
WA_P0442_STR-PRVDR sy-vline 
WA_P0442_STR-DUTDR sy-vline 
WA_P0442_STR-LISTP sy-vline 
WA_P0442_STR-DSCNT sy-vline 
WA_P0442_STR-ACCSS sy-vline 
WA_P0442_STR-PAIDP sy-vline 
WA_P0442_STR-ONEPD sy-vline 
WA_P0442_STR-REGPD sy-vline 
WA_P0442_STR-BNFTV sy-vline 
WA_P0442_STR-CRNCY sy-vline 
WA_P0442_STR-RANGE sy-vline 
WA_P0442_STR-DSTNC sy-vline 
WA_P0442_STR-DSTN2 sy-vline 
WA_P0442_STR-CALCB sy-vline 
WA_P0442_STR-CARRG sy-vline 
WA_P0442_STR-MNTRL sy-vline 
WA_P0442_STR-PAYMO sy-vline 
WA_P0442_STR-CCSSC sy-vline 
WA_P0442_STR-TTYPE sy-vline 
WA_P0442_STR-DPLAN sy-vline 
WA_P0442_STR-ADDAC sy-vline 
WA_P0442_STR-FUELR sy-vline 
WA_P0442_STR-UAVAL sy-vline 
WA_P0442_STR-VEHCL sy-vline 
WA_P0442_STR-CO2EM sy-vline 
WA_P0442_STR-CVPSH sy-vline 
WA_P0442_STR-CVFSH sy-vline 
WA_P0442_STR-POLLC sy-vline 
WA_P0442_STR-LEASC sy-vline 
WA_P0442_STR-CMPID sy-vline 
WA_P0442_STR-P46CDT sy-vline 
WA_P0442_STR-P46CID sy-vline 
WA_P0442_STR-TOTDS sy-vline 
WA_P0442_STR-VAN_EMISSION sy-vline 
WA_P0442_STR-NPBIK sy-vline 
WA_P0442_STR-SLSAC sy-vline 
WA_P0442_STR-FSLSC sy-vline 
WA_P0442_STR-NOXVL sy-vline 
WA_P0442_STR-CWLTP sy-vline 
WA_P0442_STR-EMVAZ sy-vline 
WA_P0442_STR-ACO2E sy-vline 
WA_P0442_STR-CCVIN sy-vline      INTO ld_text SEPARATED BY SPACE.

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