ABAP Select data from SAP table P2OM_INS_OM into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2OM_INS_OM 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 P2OM_INS_OM. 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 P2OM_INS_OM 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_P2OM_INS_OM TYPE STANDARD TABLE OF P2OM_INS_OM,
      WA_P2OM_INS_OM TYPE P2OM_INS_OM,
      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: <P2OM_INS_OM> TYPE P2OM_INS_OM.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2OM_INS_OM.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2OM_INS_OM
  INTO TABLE IT_P2OM_INS_OM.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2OM_INS_OM
*  INTO TABLE @DATA(IT_P2OM_INS_OM2).
*--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_P2OM_INS_OM INDEX 1 INTO DATA(WA_P2OM_INS_OM2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2OM_INS_OM ASSIGNING <P2OM_INS_OM>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2OM_INS_OM>-MANDT = 1.
<P2OM_INS_OM>-DCT_PERNR = 1.
<P2OM_INS_OM>-DCT_SEQNR = 1.
<P2OM_INS_OM>-DCT_ROWID = 1.
<P2OM_INS_OM>-CNTR1 = 1.

ENDLOOP.

LOOP AT IT_P2OM_INS_OM INTO WA_P2OM_INS_OM.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2OM_INS_OM-BEGDA, sy-vline,
  WA_P2OM_INS_OM-ENDDA, sy-vline,
  WA_P2OM_INS_OM-CORES, sy-vline,
  WA_P2OM_INS_OM-LIPTN, sy-vline,
  WA_P2OM_INS_OM-LIVSG, sy-vline,
  WA_P2OM_INS_OM-GRNAM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2OM_INS_OM 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_P2OM_INS_OM 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_P2OM_INS_OM INTO WA_P2OM_INS_OM.


*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_P2OM_INS_OM_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CORES TYPE STRING,
LIPTN TYPE STRING,
LIVSG TYPE STRING,
GRNAM TYPE STRING,
LIPBA TYPE STRING,
LIPRA TYPE STRING,
HIPTN TYPE STRING,
HIVSG TYPE STRING,
MIAMT TYPE STRING,
MPAMT TYPE STRING,
FIAMT TYPE STRING,
FPAMT TYPE STRING,
MFIAT TYPE STRING,
MFPAT TYPE STRING,
NELSP TYPE STRING,
NELCH TYPE STRING,
MCIAT TYPE STRING,
MCIPA TYPE STRING,
FCIAT TYPE STRING,
FCIPA TYPE STRING,
WAERS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2OM_INS_OM_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_P2OM_INS_OM_STR-MANDT sy-vline 
WA_P2OM_INS_OM_STR-DCT_PERNR sy-vline 
WA_P2OM_INS_OM_STR-DCT_SEQNR sy-vline 
WA_P2OM_INS_OM_STR-DCT_ROWID sy-vline 
WA_P2OM_INS_OM_STR-CNTR1 sy-vline 
WA_P2OM_INS_OM_STR-BEGDA sy-vline 
WA_P2OM_INS_OM_STR-ENDDA sy-vline 
WA_P2OM_INS_OM_STR-CORES sy-vline 
WA_P2OM_INS_OM_STR-LIPTN sy-vline 
WA_P2OM_INS_OM_STR-LIVSG sy-vline 
WA_P2OM_INS_OM_STR-GRNAM sy-vline 
WA_P2OM_INS_OM_STR-LIPBA sy-vline 
WA_P2OM_INS_OM_STR-LIPRA sy-vline 
WA_P2OM_INS_OM_STR-HIPTN sy-vline 
WA_P2OM_INS_OM_STR-HIVSG sy-vline 
WA_P2OM_INS_OM_STR-MIAMT sy-vline 
WA_P2OM_INS_OM_STR-MPAMT sy-vline 
WA_P2OM_INS_OM_STR-FIAMT sy-vline 
WA_P2OM_INS_OM_STR-FPAMT sy-vline 
WA_P2OM_INS_OM_STR-MFIAT sy-vline 
WA_P2OM_INS_OM_STR-MFPAT sy-vline 
WA_P2OM_INS_OM_STR-NELSP sy-vline 
WA_P2OM_INS_OM_STR-NELCH sy-vline 
WA_P2OM_INS_OM_STR-MCIAT sy-vline 
WA_P2OM_INS_OM_STR-MCIPA sy-vline 
WA_P2OM_INS_OM_STR-FCIAT sy-vline 
WA_P2OM_INS_OM_STR-FCIPA sy-vline 
WA_P2OM_INS_OM_STR-WAERS sy-vline      INTO ld_text SEPARATED BY SPACE.

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