ABAP Select data from SAP table P0102 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P0102 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 P0102. 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 P0102 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_P0102 TYPE STANDARD TABLE OF P0102,
      WA_P0102 TYPE P0102,
      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: <P0102> TYPE P0102.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P0102.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P0102
  INTO TABLE IT_P0102.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P0102
*  INTO TABLE @DATA(IT_P01022).
*--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_P0102 INDEX 1 INTO DATA(WA_P01022).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P0102 ASSIGNING <P0102>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P0102>-PERNR = 1.
<P0102>-INFTY = 1.
<P0102>-SUBTY = 1.
<P0102>-OBJPS = 1.
<P0102>-SPRPS = 1.

ENDLOOP.

LOOP AT IT_P0102 INTO WA_P0102.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P0102-ENDDA, sy-vline,
  WA_P0102-BEGDA, sy-vline,
  WA_P0102-SEQNR, sy-vline,
  WA_P0102-AEDTM, sy-vline,
  WA_P0102-UNAME, sy-vline,
  WA_P0102-HISTO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P0102 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_P0102 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_P0102 INTO WA_P0102.


*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_P0102_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,
GRSTY TYPE STRING,
GRNUM TYPE STRING,
SETDT TYPE STRING,
POLGR TYPE STRING,
FORPR TYPE STRING,
ENTDT TYPE STRING,
GRSTA TYPE STRING,
GRSTG TYPE STRING,
GRRES TYPE STRING,
ARBYN TYPE STRING,
TCOST TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P0102_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_P0102_STR-PERNR sy-vline 
WA_P0102_STR-INFTY sy-vline 
WA_P0102_STR-SUBTY sy-vline 
WA_P0102_STR-OBJPS sy-vline 
WA_P0102_STR-SPRPS sy-vline 
WA_P0102_STR-ENDDA sy-vline 
WA_P0102_STR-BEGDA sy-vline 
WA_P0102_STR-SEQNR sy-vline 
WA_P0102_STR-AEDTM sy-vline 
WA_P0102_STR-UNAME sy-vline 
WA_P0102_STR-HISTO sy-vline 
WA_P0102_STR-ITXEX sy-vline 
WA_P0102_STR-REFEX sy-vline 
WA_P0102_STR-ORDEX sy-vline 
WA_P0102_STR-ITBLD sy-vline 
WA_P0102_STR-PREAS sy-vline 
WA_P0102_STR-FLAG1 sy-vline 
WA_P0102_STR-FLAG2 sy-vline 
WA_P0102_STR-FLAG3 sy-vline 
WA_P0102_STR-FLAG4 sy-vline 
WA_P0102_STR-RESE1 sy-vline 
WA_P0102_STR-RESE2 sy-vline 
WA_P0102_STR-GRPVL sy-vline 
WA_P0102_STR-GRSTY sy-vline 
WA_P0102_STR-GRNUM sy-vline 
WA_P0102_STR-SETDT sy-vline 
WA_P0102_STR-POLGR sy-vline 
WA_P0102_STR-FORPR sy-vline 
WA_P0102_STR-ENTDT sy-vline 
WA_P0102_STR-GRSTA sy-vline 
WA_P0102_STR-GRSTG sy-vline 
WA_P0102_STR-GRRES sy-vline 
WA_P0102_STR-ARBYN sy-vline 
WA_P0102_STR-TCOST sy-vline      INTO ld_text SEPARATED BY SPACE.

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