ABAP Select data from SAP table P2GR_GR_SE into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2GR_GR_SE 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 P2GR_GR_SE. 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 P2GR_GR_SE 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_P2GR_GR_SE TYPE STANDARD TABLE OF P2GR_GR_SE,
      WA_P2GR_GR_SE TYPE P2GR_GR_SE,
      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: <P2GR_GR_SE> TYPE P2GR_GR_SE.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2GR_GR_SE.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2GR_GR_SE
  INTO TABLE IT_P2GR_GR_SE.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2GR_GR_SE
*  INTO TABLE @DATA(IT_P2GR_GR_SE2).
*--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_P2GR_GR_SE INDEX 1 INTO DATA(WA_P2GR_GR_SE2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2GR_GR_SE ASSIGNING <P2GR_GR_SE>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2GR_GR_SE>-MANDT = 1.
<P2GR_GR_SE>-DCT_PERNR = 1.
<P2GR_GR_SE>-DCT_SEQNR = 1.
<P2GR_GR_SE>-DCT_ROWID = 1.
<P2GR_GR_SE>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_P2GR_GR_SE INTO WA_P2GR_GR_SE.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2GR_GR_SE-ENDDA, sy-vline,
  WA_P2GR_GR_SE-MMAPD, sy-vline,
  WA_P2GR_GR_SE-MAXPD, sy-vline,
  WA_P2GR_GR_SE-FACPD, sy-vline,
  WA_P2GR_GR_SE-ROUPD, sy-vline,
  WA_P2GR_GR_SE-ROUPF, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2GR_GR_SE 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_P2GR_GR_SE 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_P2GR_GR_SE INTO WA_P2GR_GR_SE.


*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_P2GR_GR_SE_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
MMAPD TYPE STRING,
MAXPD TYPE STRING,
FACPD TYPE STRING,
ROUPD TYPE STRING,
ROUPF TYPE STRING,
MMAID TYPE STRING,
MAXID TYPE STRING,
FACID TYPE STRING,
ROUID TYPE STRING,
ROUIF TYPE STRING,
METPD TYPE STRING,
METID TYPE STRING,
METNP TYPE STRING,
MILPD TYPE STRING,
MILID TYPE STRING,
METIL TYPE STRING,
MDAIH TYPE STRING,
MBASI TYPE STRING,
MDISM TYPE STRING,
ENTEB TYPE STRING,
MPDEB TYPE STRING,
MCDED TYPE STRING,
FCTEB TYPE STRING,
CLDEB TYPE STRING,
MXDEB TYPE STRING,
WTBEB TYPE STRING,
WTIEB TYPE STRING,
WTLEB TYPE STRING,
ENTCB TYPE STRING,
MPDCB TYPE STRING,
MCDCB TYPE STRING,
FCTCB TYPE STRING,
CLDCB TYPE STRING,
MXDCB TYPE STRING,
WTBCB TYPE STRING,
WTICB TYPE STRING,
WTLCB TYPE STRING,
ENTVB TYPE STRING,
MDMVB TYPE STRING,
MCDVB TYPE STRING,
MLMVB TYPE STRING,
MLXVB TYPE STRING,
WTBVB TYPE STRING,
WTIVB TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2GR_GR_SE_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_P2GR_GR_SE_STR-MANDT sy-vline 
WA_P2GR_GR_SE_STR-DCT_PERNR sy-vline 
WA_P2GR_GR_SE_STR-DCT_SEQNR sy-vline 
WA_P2GR_GR_SE_STR-DCT_ROWID sy-vline 
WA_P2GR_GR_SE_STR-BEGDA sy-vline 
WA_P2GR_GR_SE_STR-ENDDA sy-vline 
WA_P2GR_GR_SE_STR-MMAPD sy-vline 
WA_P2GR_GR_SE_STR-MAXPD sy-vline 
WA_P2GR_GR_SE_STR-FACPD sy-vline 
WA_P2GR_GR_SE_STR-ROUPD sy-vline 
WA_P2GR_GR_SE_STR-ROUPF sy-vline 
WA_P2GR_GR_SE_STR-MMAID sy-vline 
WA_P2GR_GR_SE_STR-MAXID sy-vline 
WA_P2GR_GR_SE_STR-FACID sy-vline 
WA_P2GR_GR_SE_STR-ROUID sy-vline 
WA_P2GR_GR_SE_STR-ROUIF sy-vline 
WA_P2GR_GR_SE_STR-METPD sy-vline 
WA_P2GR_GR_SE_STR-METID sy-vline 
WA_P2GR_GR_SE_STR-METNP sy-vline 
WA_P2GR_GR_SE_STR-MILPD sy-vline 
WA_P2GR_GR_SE_STR-MILID sy-vline 
WA_P2GR_GR_SE_STR-METIL sy-vline 
WA_P2GR_GR_SE_STR-MDAIH sy-vline 
WA_P2GR_GR_SE_STR-MBASI sy-vline 
WA_P2GR_GR_SE_STR-MDISM sy-vline 
WA_P2GR_GR_SE_STR-ENTEB sy-vline 
WA_P2GR_GR_SE_STR-MPDEB sy-vline 
WA_P2GR_GR_SE_STR-MCDED sy-vline 
WA_P2GR_GR_SE_STR-FCTEB sy-vline 
WA_P2GR_GR_SE_STR-CLDEB sy-vline 
WA_P2GR_GR_SE_STR-MXDEB sy-vline 
WA_P2GR_GR_SE_STR-WTBEB sy-vline 
WA_P2GR_GR_SE_STR-WTIEB sy-vline 
WA_P2GR_GR_SE_STR-WTLEB sy-vline 
WA_P2GR_GR_SE_STR-ENTCB sy-vline 
WA_P2GR_GR_SE_STR-MPDCB sy-vline 
WA_P2GR_GR_SE_STR-MCDCB sy-vline 
WA_P2GR_GR_SE_STR-FCTCB sy-vline 
WA_P2GR_GR_SE_STR-CLDCB sy-vline 
WA_P2GR_GR_SE_STR-MXDCB sy-vline 
WA_P2GR_GR_SE_STR-WTBCB sy-vline 
WA_P2GR_GR_SE_STR-WTICB sy-vline 
WA_P2GR_GR_SE_STR-WTLCB sy-vline 
WA_P2GR_GR_SE_STR-ENTVB sy-vline 
WA_P2GR_GR_SE_STR-MDMVB sy-vline 
WA_P2GR_GR_SE_STR-MCDVB sy-vline 
WA_P2GR_GR_SE_STR-MLMVB sy-vline 
WA_P2GR_GR_SE_STR-MLXVB sy-vline 
WA_P2GR_GR_SE_STR-WTBVB sy-vline 
WA_P2GR_GR_SE_STR-WTIVB sy-vline      INTO ld_text SEPARATED BY SPACE.

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