ABAP Select data from SAP table P01C_SYEAR into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP P01C_SYEAR 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 P01C_SYEAR. 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 P01C_SYEAR 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_P01C_SYEAR TYPE STANDARD TABLE OF P01C_SYEAR,
      WA_P01C_SYEAR TYPE P01C_SYEAR,
      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: <P01C_SYEAR> TYPE P01C_SYEAR.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_P01C_SYEAR.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM P01C_SYEAR
  INTO TABLE IT_P01C_SYEAR.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM P01C_SYEAR
*  INTO TABLE @DATA(IT_P01C_SYEAR2).
*--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_P01C_SYEAR INDEX 1 INTO DATA(WA_P01C_SYEAR2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_P01C_SYEAR ASSIGNING <P01C_SYEAR>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<P01C_SYEAR>-SERVY = 1.
<P01C_SYEAR>-BEGDA = 1.
<P01C_SYEAR>-ENDDA = 1.
<P01C_SYEAR>-SEQNO = 1.
<P01C_SYEAR>-DZPRZ = 1.

ENDLOOP.

LOOP AT IT_P01C_SYEAR INTO WA_P01C_SYEAR.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_P01C_SYEAR-RELBS, sy-vline,
  WA_P01C_SYEAR-GPENR, sy-vline,
  WA_P01C_SYEAR-PDAYS, sy-vline,
  WA_P01C_SYEAR-YREST, sy-vline,
  WA_P01C_SYEAR-YPART, sy-vline,
  WA_P01C_SYEAR-KJEND, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_P01C_SYEAR 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_P01C_SYEAR 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_P01C_SYEAR INTO WA_P01C_SYEAR.


*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_P01C_SYEAR_STR, 
SERVY TYPE STRING,
BEGDA TYPE STRING,
ENDDA TYPE STRING,
SEQNO TYPE STRING,
DZPRZ TYPE STRING,
RELBS TYPE STRING,
GPENR TYPE STRING,
PDAYS TYPE STRING,
YREST TYPE STRING,
YPART TYPE STRING,
KJEND TYPE STRING,
PRZFI TYPE STRING,
BETFI TYPE STRING,
YEARV TYPE STRING,
YEARC TYPE STRING,END OF T_EKKO_STR.
DATA: WA_P01C_SYEAR_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_P01C_SYEAR_STR-SERVY sy-vline 
WA_P01C_SYEAR_STR-BEGDA sy-vline 
WA_P01C_SYEAR_STR-ENDDA sy-vline 
WA_P01C_SYEAR_STR-SEQNO sy-vline 
WA_P01C_SYEAR_STR-DZPRZ sy-vline 
WA_P01C_SYEAR_STR-RELBS sy-vline 
WA_P01C_SYEAR_STR-GPENR sy-vline 
WA_P01C_SYEAR_STR-PDAYS sy-vline 
WA_P01C_SYEAR_STR-YREST sy-vline 
WA_P01C_SYEAR_STR-YPART sy-vline 
WA_P01C_SYEAR_STR-KJEND sy-vline 
WA_P01C_SYEAR_STR-PRZFI sy-vline 
WA_P01C_SYEAR_STR-BETFI sy-vline 
WA_P01C_SYEAR_STR-YEARV sy-vline 
WA_P01C_SYEAR_STR-YEARC sy-vline      INTO ld_text SEPARATED BY SPACE.

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