ABAP Select data from SAP table P0331 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0331 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 P0331. 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 P0331 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_P0331 TYPE STANDARD TABLE OF P0331,
      WA_P0331 TYPE P0331,
      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: <P0331> TYPE P0331.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0331.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0331
  INTO TABLE IT_P0331.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0331
*  INTO TABLE @DATA(IT_P03312).
*--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_P0331 INDEX 1 INTO DATA(WA_P03312).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0331 ASSIGNING <P0331>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0331>-PERNR = 1.
<P0331>-INFTY = 1.
<P0331>-SUBTY = 1.
<P0331>-OBJPS = 1.
<P0331>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0331 INTO WA_P0331.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0331-ENDDA, sy-vline,
  WA_P0331-BEGDA, sy-vline,
  WA_P0331-SEQNR, sy-vline,
  WA_P0331-AEDTM, sy-vline,
  WA_P0331-UNAME, sy-vline,
  WA_P0331-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0331 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_P0331 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_P0331 INTO WA_P0331.


*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_P0331_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,
FINUM TYPE STRING,
FNAME TYPE STRING,
CODRF TYPE STRING,
INCAT TYPE STRING,
MSTAT TYPE STRING,
WSPSE TYPE STRING,
HSPSE TYPE STRING,
NRDEP TYPE STRING,
NDEPH TYPE STRING,
SVRAT TYPE STRING,
RESID TYPE STRING,
SBVAT TYPE STRING,
REDRT TYPE STRING,
CONGL TYPE STRING,
LIBEX TYPE STRING,
LIBRT TYPE STRING,
FISCA TYPE STRING,
SPBEN TYPE STRING,
CBIRS TYPE STRING,
VATRA TYPE STRING,
IWBRT TYPE STRING,
DRDEF TYPE STRING,
SBCAT TYPE STRING,
EMIGR TYPE STRING,
NROCP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0331_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_P0331_STR-PERNR sy-vline 
WA_P0331_STR-INFTY sy-vline 
WA_P0331_STR-SUBTY sy-vline 
WA_P0331_STR-OBJPS sy-vline 
WA_P0331_STR-SPRPS sy-vline 
WA_P0331_STR-ENDDA sy-vline 
WA_P0331_STR-BEGDA sy-vline 
WA_P0331_STR-SEQNR sy-vline 
WA_P0331_STR-AEDTM sy-vline 
WA_P0331_STR-UNAME sy-vline 
WA_P0331_STR-HISTO sy-vline 
WA_P0331_STR-ITXEX sy-vline 
WA_P0331_STR-REFEX sy-vline 
WA_P0331_STR-ORDEX sy-vline 
WA_P0331_STR-ITBLD sy-vline 
WA_P0331_STR-PREAS sy-vline 
WA_P0331_STR-FLAG1 sy-vline 
WA_P0331_STR-FLAG2 sy-vline 
WA_P0331_STR-FLAG3 sy-vline 
WA_P0331_STR-FLAG4 sy-vline 
WA_P0331_STR-RESE1 sy-vline 
WA_P0331_STR-RESE2 sy-vline 
WA_P0331_STR-GRPVL sy-vline 
WA_P0331_STR-FINUM sy-vline 
WA_P0331_STR-FNAME sy-vline 
WA_P0331_STR-CODRF sy-vline 
WA_P0331_STR-INCAT sy-vline 
WA_P0331_STR-MSTAT sy-vline 
WA_P0331_STR-WSPSE sy-vline 
WA_P0331_STR-HSPSE sy-vline 
WA_P0331_STR-NRDEP sy-vline 
WA_P0331_STR-NDEPH sy-vline 
WA_P0331_STR-SVRAT sy-vline 
WA_P0331_STR-RESID sy-vline 
WA_P0331_STR-SBVAT sy-vline 
WA_P0331_STR-REDRT sy-vline 
WA_P0331_STR-CONGL sy-vline 
WA_P0331_STR-LIBEX sy-vline 
WA_P0331_STR-LIBRT sy-vline 
WA_P0331_STR-FISCA sy-vline 
WA_P0331_STR-SPBEN sy-vline 
WA_P0331_STR-CBIRS sy-vline 
WA_P0331_STR-VATRA sy-vline 
WA_P0331_STR-IWBRT sy-vline 
WA_P0331_STR-DRDEF sy-vline 
WA_P0331_STR-SBCAT sy-vline 
WA_P0331_STR-EMIGR sy-vline 
WA_P0331_STR-NROCP sy-vline      INTO ld_text SEPARATED BY SPACE.

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