ABAP Select data from SAP table P2RL_EPF into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P2RL_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 P2RL_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 P2RL_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_P2RL_EPF TYPE STANDARD TABLE OF P2RL_EPF,
      WA_P2RL_EPF TYPE P2RL_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: <P2RL_EPF> TYPE P2RL_EPF.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P2RL_EPF.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P2RL_EPF
  INTO TABLE IT_P2RL_EPF.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P2RL_EPF
*  INTO TABLE @DATA(IT_P2RL_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_P2RL_EPF INDEX 1 INTO DATA(WA_P2RL_EPF2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P2RL_EPF ASSIGNING <P2RL_EPF>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P2RL_EPF>-MANDT = 1.
<P2RL_EPF>-DCT_PERNR = 1.
<P2RL_EPF>-DCT_SEQNR = 1.
<P2RL_EPF>-CNTR3 = 1.
<P2RL_EPF>-BEGDA = 1.

ENDLOOP.

LOOP AT IT_P2RL_EPF INTO WA_P2RL_EPF.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P2RL_EPF-ENDDA, sy-vline,
  WA_P2RL_EPF-EPFNO, sy-vline,
  WA_P2RL_EPF-EPFIN, sy-vline,
  WA_P2RL_EPF-EPFOP, sy-vline,
  WA_P2RL_EPF-CPCEE, sy-vline,
  WA_P2RL_EPF-CINEE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P2RL_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_P2RL_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_P2RL_EPF INTO WA_P2RL_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_P2RL_EPF_STR, 
MANDT TYPE STRING,
DCT_PERNR TYPE STRING,
DCT_SEQNR TYPE STRING,
CNTR3 TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
EPFNO TYPE STRING,
EPFIN TYPE STRING,
EPFOP TYPE STRING,
CPCEE TYPE STRING,
CINEE TYPE STRING,
AMTEE TYPE STRING,
EEACY TYPE STRING,
OPREE TYPE STRING,
CPCER TYPE STRING,
CINER TYPE STRING,
AMTER TYPE STRING,
ERACY TYPE STRING,
OPRER TYPE STRING,
ICIND TYPE STRING,
ERRNE TYPE STRING,
EMFSL TYPE STRING,
RETIN TYPE STRING,
RETAG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P2RL_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_P2RL_EPF_STR-MANDT sy-vline 
WA_P2RL_EPF_STR-DCT_PERNR sy-vline 
WA_P2RL_EPF_STR-DCT_SEQNR sy-vline 
WA_P2RL_EPF_STR-CNTR3 sy-vline 
WA_P2RL_EPF_STR-BEGDA sy-vline 
WA_P2RL_EPF_STR-ENDDA sy-vline 
WA_P2RL_EPF_STR-EPFNO sy-vline 
WA_P2RL_EPF_STR-EPFIN sy-vline 
WA_P2RL_EPF_STR-EPFOP sy-vline 
WA_P2RL_EPF_STR-CPCEE sy-vline 
WA_P2RL_EPF_STR-CINEE sy-vline 
WA_P2RL_EPF_STR-AMTEE sy-vline 
WA_P2RL_EPF_STR-EEACY sy-vline 
WA_P2RL_EPF_STR-OPREE sy-vline 
WA_P2RL_EPF_STR-CPCER sy-vline 
WA_P2RL_EPF_STR-CINER sy-vline 
WA_P2RL_EPF_STR-AMTER sy-vline 
WA_P2RL_EPF_STR-ERACY sy-vline 
WA_P2RL_EPF_STR-OPRER sy-vline 
WA_P2RL_EPF_STR-ICIND sy-vline 
WA_P2RL_EPF_STR-ERRNE sy-vline 
WA_P2RL_EPF_STR-EMFSL sy-vline 
WA_P2RL_EPF_STR-RETIN sy-vline 
WA_P2RL_EPF_STR-RETAG sy-vline      INTO ld_text SEPARATED BY SPACE.

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