ABAP Select data from SAP table P2IN_EPF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2IN_EPF 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 P2IN_EPF. 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 P2IN_EPF 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_P2IN_EPF TYPE STANDARD TABLE OF P2IN_EPF,
      WA_P2IN_EPF TYPE P2IN_EPF,
      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: <P2IN_EPF> TYPE P2IN_EPF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2IN_EPF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2IN_EPF
  INTO TABLE IT_P2IN_EPF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2IN_EPF
*  INTO TABLE @DATA(IT_P2IN_EPF2).
*--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_P2IN_EPF INDEX 1 INTO DATA(WA_P2IN_EPF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2IN_EPF ASSIGNING <P2IN_EPF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2IN_EPF>-MANDT = 1.
<P2IN_EPF>-DCT_PERNR = 1.
<P2IN_EPF>-DCT_SEQNR = 1.
<P2IN_EPF>-DCT_ROWID = 1.
<P2IN_EPF>-APZNR = 1.

ENDLOOP.

LOOP AT IT_P2IN_EPF INTO WA_P2IN_EPF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2IN_EPF-CNTR1, sy-vline,
  WA_P2IN_EPF-BEGDA, sy-vline,
  WA_P2IN_EPF-ENDDA, sy-vline,
  WA_P2IN_EPF-PFREF, sy-vline,
  WA_P2IN_EPF-EEPFN, sy-vline,
  WA_P2IN_EPF-EEPNN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2IN_EPF 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_P2IN_EPF 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_P2IN_EPF INTO WA_P2IN_EPF.


*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_P2IN_EPF_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
DCT_ROWID TYPE STRING,
APZNR TYPE STRING,
CNTR1 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
PFREF TYPE STRING,
EEPFN TYPE STRING,
EEPNN TYPE STRING,
CTYPE TYPE STRING,
EEBAS TYPE STRING,
PFBAS TYPE STRING,
PNBAS TYPE STRING,
EEVPF TYPE STRING,
EECTR TYPE STRING,
CERRT TYPE STRING,
ERCTR TYPE STRING,
ERPNS TYPE STRING,
PFADM TYPE STRING,
EDLIC TYPE STRING,
EDLIA TYPE STRING,
PNFLG TYPE STRING,
PAYED TYPE STRING,
TSTID TYPE STRING,
TSTTY TYPE STRING,
PENID TYPE STRING,
TSTPR TYPE STRING,
PFINT TYPE STRING,
BSSWT TYPE STRING,
EEPFW TYPE STRING,
EVPFW TYPE STRING,
ERPFW TYPE STRING,
ERPNW TYPE STRING,
EREDW TYPE STRING,
ERPFA TYPE STRING,
EREDA TYPE STRING,
PFAMT TYPE STRING,
WAEHI TYPE STRING,
PNREF TYPE STRING,
PFRFN TYPE STRING,
VPFLM TYPE STRING,
PFCON TYPE STRING,
BDFLG TYPE STRING,
EEPFM TYPE STRING,
EEPNM TYPE STRING,
ERCCD TYPE STRING,
ERFLG TYPE STRING,
ERPRT TYPE STRING,
EECCD TYPE STRING,
EEFLG TYPE STRING,
EEPRT TYPE STRING,
EPGCR TYPE STRING,
PGCTR TYPE STRING,
INWRK TYPE STRING,
GVPEN TYPE STRING,
PNAGE TYPE STRING,
PFDTE TYPE STRING,
GVEPF TYPE STRING,
WMCTR TYPE STRING,
GVPFW TYPE STRING,
GVPNW TYPE STRING,
TTPFW TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2IN_EPF_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_P2IN_EPF_STR-MANDT sy-vline 
WA_P2IN_EPF_STR-DCT_PERNR sy-vline 
WA_P2IN_EPF_STR-DCT_SEQNR sy-vline 
WA_P2IN_EPF_STR-DCT_ROWID sy-vline 
WA_P2IN_EPF_STR-APZNR sy-vline 
WA_P2IN_EPF_STR-CNTR1 sy-vline 
WA_P2IN_EPF_STR-BEGDA sy-vline 
WA_P2IN_EPF_STR-ENDDA sy-vline 
WA_P2IN_EPF_STR-PFREF sy-vline 
WA_P2IN_EPF_STR-EEPFN sy-vline 
WA_P2IN_EPF_STR-EEPNN sy-vline 
WA_P2IN_EPF_STR-CTYPE sy-vline 
WA_P2IN_EPF_STR-EEBAS sy-vline 
WA_P2IN_EPF_STR-PFBAS sy-vline 
WA_P2IN_EPF_STR-PNBAS sy-vline 
WA_P2IN_EPF_STR-EEVPF sy-vline 
WA_P2IN_EPF_STR-EECTR sy-vline 
WA_P2IN_EPF_STR-CERRT sy-vline 
WA_P2IN_EPF_STR-ERCTR sy-vline 
WA_P2IN_EPF_STR-ERPNS sy-vline 
WA_P2IN_EPF_STR-PFADM sy-vline 
WA_P2IN_EPF_STR-EDLIC sy-vline 
WA_P2IN_EPF_STR-EDLIA sy-vline 
WA_P2IN_EPF_STR-PNFLG sy-vline 
WA_P2IN_EPF_STR-PAYED sy-vline 
WA_P2IN_EPF_STR-TSTID sy-vline 
WA_P2IN_EPF_STR-TSTTY sy-vline 
WA_P2IN_EPF_STR-PENID sy-vline 
WA_P2IN_EPF_STR-TSTPR sy-vline 
WA_P2IN_EPF_STR-PFINT sy-vline 
WA_P2IN_EPF_STR-BSSWT sy-vline 
WA_P2IN_EPF_STR-EEPFW sy-vline 
WA_P2IN_EPF_STR-EVPFW sy-vline 
WA_P2IN_EPF_STR-ERPFW sy-vline 
WA_P2IN_EPF_STR-ERPNW sy-vline 
WA_P2IN_EPF_STR-EREDW sy-vline 
WA_P2IN_EPF_STR-ERPFA sy-vline 
WA_P2IN_EPF_STR-EREDA sy-vline 
WA_P2IN_EPF_STR-PFAMT sy-vline 
WA_P2IN_EPF_STR-WAEHI sy-vline 
WA_P2IN_EPF_STR-PNREF sy-vline 
WA_P2IN_EPF_STR-PFRFN sy-vline 
WA_P2IN_EPF_STR-VPFLM sy-vline 
WA_P2IN_EPF_STR-PFCON sy-vline 
WA_P2IN_EPF_STR-BDFLG sy-vline 
WA_P2IN_EPF_STR-EEPFM sy-vline 
WA_P2IN_EPF_STR-EEPNM sy-vline 
WA_P2IN_EPF_STR-ERCCD sy-vline 
WA_P2IN_EPF_STR-ERFLG sy-vline 
WA_P2IN_EPF_STR-ERPRT sy-vline 
WA_P2IN_EPF_STR-EECCD sy-vline 
WA_P2IN_EPF_STR-EEFLG sy-vline 
WA_P2IN_EPF_STR-EEPRT sy-vline 
WA_P2IN_EPF_STR-EPGCR sy-vline 
WA_P2IN_EPF_STR-PGCTR sy-vline 
WA_P2IN_EPF_STR-INWRK sy-vline 
WA_P2IN_EPF_STR-GVPEN sy-vline 
WA_P2IN_EPF_STR-PNAGE sy-vline 
WA_P2IN_EPF_STR-PFDTE sy-vline 
WA_P2IN_EPF_STR-GVEPF sy-vline 
WA_P2IN_EPF_STR-WMCTR sy-vline 
WA_P2IN_EPF_STR-GVPFW sy-vline 
WA_P2IN_EPF_STR-GVPNW sy-vline 
WA_P2IN_EPF_STR-TTPFW sy-vline      INTO ld_text SEPARATED BY SPACE.

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