ABAP Select data from SAP table PCALENDARENDWK into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PCALENDARENDWK
*  INTO TABLE @DATA(IT_PCALENDARENDWK2).
*--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_PCALENDARENDWK INDEX 1 INTO DATA(WA_PCALENDARENDWK2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PCALENDARENDWK>-FIRSTDAYOFYEARDATE = 1.
<PCALENDARENDWK>-SHIFTEDCALENDARDATE = 1.
<PCALENDARENDWK>-CALENDARDATE = 1.
<PCALENDARENDWK>-YEARMONTH = 1.
<PCALENDARENDWK>-YEARQUARTER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PCALENDARENDWK-CALENDARWEEK, sy-vline,
  WA_PCALENDARENDWK-ENDDATEWEEK, sy-vline,
  WA_PCALENDARENDWK-YEARDAY, sy-vline,
  WA_PCALENDARENDWK-CALENDARYEAR, sy-vline,
  WA_PCALENDARENDWK-FIRSTDAYOFWEEKDATE, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_PCALENDARENDWK 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_PCALENDARENDWK 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_PCALENDARENDWK INTO WA_PCALENDARENDWK.


*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_PCALENDARENDWK_STR, 
FIRSTDAYOFYEARDATE TYPE STRING,
SHIFTEDCALENDARDATE TYPE STRING,
CALENDARDATE TYPE STRING,
YEARMONTH TYPE STRING,
YEARQUARTER TYPE STRING,
CALENDARWEEK TYPE STRING,
ENDDATEWEEK TYPE STRING,
YEARDAY TYPE STRING,
CALENDARYEAR TYPE STRING,
FIRSTDAYOFWEEKDATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PCALENDARENDWK_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_PCALENDARENDWK_STR-FIRSTDAYOFYEARDATE sy-vline 
WA_PCALENDARENDWK_STR-SHIFTEDCALENDARDATE sy-vline 
WA_PCALENDARENDWK_STR-CALENDARDATE sy-vline 
WA_PCALENDARENDWK_STR-YEARMONTH sy-vline 
WA_PCALENDARENDWK_STR-YEARQUARTER sy-vline 
WA_PCALENDARENDWK_STR-CALENDARWEEK sy-vline 
WA_PCALENDARENDWK_STR-ENDDATEWEEK sy-vline 
WA_PCALENDARENDWK_STR-YEARDAY sy-vline 
WA_PCALENDARENDWK_STR-CALENDARYEAR sy-vline 
WA_PCALENDARENDWK_STR-FIRSTDAYOFWEEKDATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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