ABAP Select data from SAP table P2RM_MPENS into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RM_MPENS 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 P2RM_MPENS. 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 P2RM_MPENS 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_P2RM_MPENS TYPE STANDARD TABLE OF P2RM_MPENS,
      WA_P2RM_MPENS TYPE P2RM_MPENS,
      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: <P2RM_MPENS> TYPE P2RM_MPENS.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RM_MPENS.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RM_MPENS
  INTO TABLE IT_P2RM_MPENS.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RM_MPENS
*  INTO TABLE @DATA(IT_P2RM_MPENS2).
*--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_P2RM_MPENS INDEX 1 INTO DATA(WA_P2RM_MPENS2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RM_MPENS ASSIGNING <P2RM_MPENS>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RM_MPENS>-MANDT = 1.
<P2RM_MPENS>-DCT_PERNR = 1.
<P2RM_MPENS>-DCT_SEQNR = 1.
<P2RM_MPENS>-DCT_ROWID = 1.
<P2RM_MPENS>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_P2RM_MPENS INTO WA_P2RM_MPENS.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RM_MPENS-ENDDA, sy-vline,
  WA_P2RM_MPENS-CNTR1, sy-vline,
  WA_P2RM_MPENS-PTYPE, sy-vline,
  WA_P2RM_MPENS-T5M7N_WEE, sy-vline,
  WA_P2RM_MPENS-T5M7N_WER, sy-vline,
  WA_P2RM_MPENS-AMPCR, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RM_MPENS 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_P2RM_MPENS 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_P2RM_MPENS INTO WA_P2RM_MPENS.


*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_P2RM_MPENS_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
CNTR1 TYPE STRING,
PTYPE TYPE STRING,
T5M7N_WEE TYPE STRING,
T5M7N_WER TYPE STRING,
AMPCR TYPE STRING,
AMP_INST TYPE STRING,
PEGRL TYPE STRING,
PEGRLBTRG TYPE STRING,
KAPKZAG TYPE STRING,
PENSRZ_ABG TYPE STRING,
BTRAG TYPE STRING,
PRZAG TYPE STRING,
KAPKZMA TYPE STRING,
PENSRZ_ABN TYPE STRING,
BTRMA TYPE STRING,
PRZMA TYPE STRING,
POLNR TYPE STRING,
BMODT TYPE STRING,
BANKL TYPE STRING,
BKKTO TYPE STRING,
MPACSPLTEE TYPE STRING,
MPACSPLTER TYPE STRING,
TRANS TYPE STRING,
PBSNR TYPE STRING,
INST TYPE STRING,
AFTLN TYPE STRING,
CREAS TYPE STRING,
PADWT TYPE STRING,
PBSWT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RM_MPENS_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_P2RM_MPENS_STR-MANDT sy-vline 
WA_P2RM_MPENS_STR-DCT_PERNR sy-vline 
WA_P2RM_MPENS_STR-DCT_SEQNR sy-vline 
WA_P2RM_MPENS_STR-DCT_ROWID sy-vline 
WA_P2RM_MPENS_STR-BEGDA sy-vline 
WA_P2RM_MPENS_STR-ENDDA sy-vline 
WA_P2RM_MPENS_STR-CNTR1 sy-vline 
WA_P2RM_MPENS_STR-PTYPE sy-vline 
WA_P2RM_MPENS_STR-T5M7N_WEE sy-vline 
WA_P2RM_MPENS_STR-T5M7N_WER sy-vline 
WA_P2RM_MPENS_STR-AMPCR sy-vline 
WA_P2RM_MPENS_STR-AMP_INST sy-vline 
WA_P2RM_MPENS_STR-PEGRL sy-vline 
WA_P2RM_MPENS_STR-PEGRLBTRG sy-vline 
WA_P2RM_MPENS_STR-KAPKZAG sy-vline 
WA_P2RM_MPENS_STR-PENSRZ_ABG sy-vline 
WA_P2RM_MPENS_STR-BTRAG sy-vline 
WA_P2RM_MPENS_STR-PRZAG sy-vline 
WA_P2RM_MPENS_STR-KAPKZMA sy-vline 
WA_P2RM_MPENS_STR-PENSRZ_ABN sy-vline 
WA_P2RM_MPENS_STR-BTRMA sy-vline 
WA_P2RM_MPENS_STR-PRZMA sy-vline 
WA_P2RM_MPENS_STR-POLNR sy-vline 
WA_P2RM_MPENS_STR-BMODT sy-vline 
WA_P2RM_MPENS_STR-BANKL sy-vline 
WA_P2RM_MPENS_STR-BKKTO sy-vline 
WA_P2RM_MPENS_STR-MPACSPLTEE sy-vline 
WA_P2RM_MPENS_STR-MPACSPLTER sy-vline 
WA_P2RM_MPENS_STR-TRANS sy-vline 
WA_P2RM_MPENS_STR-PBSNR sy-vline 
WA_P2RM_MPENS_STR-INST sy-vline 
WA_P2RM_MPENS_STR-AFTLN sy-vline 
WA_P2RM_MPENS_STR-CREAS sy-vline 
WA_P2RM_MPENS_STR-PADWT sy-vline 
WA_P2RM_MPENS_STR-PBSWT sy-vline      INTO ld_text SEPARATED BY SPACE.

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