ABAP Select data from SAP table PSDSI3CD2 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP PSDSI3CD2 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 PSDSI3CD2. 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 PSDSI3CD2 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_PSDSI3CD2 TYPE STANDARD TABLE OF PSDSI3CD2,
      WA_PSDSI3CD2 TYPE PSDSI3CD2,
      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: <PSDSI3CD2> TYPE PSDSI3CD2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_PSDSI3CD2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM PSDSI3CD2
  INTO TABLE IT_PSDSI3CD2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PSDSI3CD2
*  INTO TABLE @DATA(IT_PSDSI3CD22).
*--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_PSDSI3CD2 INDEX 1 INTO DATA(WA_PSDSI3CD22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_PSDSI3CD2 ASSIGNING <PSDSI3CD2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PSDSI3CD2>-CALENDARDATE = 1.
<PSDSI3CD2>-CALENDARYEAR = 1.
<PSDSI3CD2>-LASTCALENDARYEAR = 1.
<PSDSI3CD2>-YEARQUARTER = 1.
<PSDSI3CD2>-CALENDARQUARTER = 1.

ENDLOOP.

LOOP AT IT_PSDSI3CD2 INTO WA_PSDSI3CD2.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PSDSI3CD2-YEARMONTH, sy-vline,
  WA_PSDSI3CD2-CALENDARMONTH, sy-vline,
  WA_PSDSI3CD2-CALENDARWEEK, sy-vline,
  WA_PSDSI3CD2-PARTOFMONTH, sy-vline,
  WA_PSDSI3CD2-PARTOFQUARTER, sy-vline,
  WA_PSDSI3CD2-PREVIOUS1YEARQUARTER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PSDSI3CD2 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_PSDSI3CD2 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_PSDSI3CD2 INTO WA_PSDSI3CD2.


*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_PSDSI3CD2_STR, 
CALENDARDATE TYPE STRING,
CALENDARYEAR TYPE STRING,
LASTCALENDARYEAR TYPE STRING,
YEARQUARTER TYPE STRING,
CALENDARQUARTER TYPE STRING,
YEARMONTH TYPE STRING,
CALENDARMONTH TYPE STRING,
CALENDARWEEK TYPE STRING,
PARTOFMONTH TYPE STRING,
PARTOFQUARTER TYPE STRING,
PREVIOUS1YEARQUARTER TYPE STRING,
NEXT1YEARMONTH TYPE STRING,
PREVIOUS1YEARMONTH TYPE STRING,
PREVIOUS2YEARMONTH TYPE STRING,
PREVIOUS3YEARMONTH TYPE STRING,
PREVIOUS4YEARMONTH TYPE STRING,
PREVIOUS5YEARMONTH TYPE STRING,
PREVIOUS6YEARMONTH TYPE STRING,
PREVIOUS7YEARMONTH TYPE STRING,
PREVIOUS13YEARMONTH TYPE STRING,
PREVIOUS14YEARMONTH TYPE STRING,
PREVIOUS15YEARMONTH TYPE STRING,
PREVIOUS16YEARMONTH TYPE STRING,
PREVIOUS17YEARMONTH TYPE STRING,
PREVIOUS18YEARMONTH TYPE STRING,END OF T_EKKO_STR.
DATA: WA_PSDSI3CD2_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_PSDSI3CD2_STR-CALENDARDATE sy-vline 
WA_PSDSI3CD2_STR-CALENDARYEAR sy-vline 
WA_PSDSI3CD2_STR-LASTCALENDARYEAR sy-vline 
WA_PSDSI3CD2_STR-YEARQUARTER sy-vline 
WA_PSDSI3CD2_STR-CALENDARQUARTER sy-vline 
WA_PSDSI3CD2_STR-YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-CALENDARMONTH sy-vline 
WA_PSDSI3CD2_STR-CALENDARWEEK sy-vline 
WA_PSDSI3CD2_STR-PARTOFMONTH sy-vline 
WA_PSDSI3CD2_STR-PARTOFQUARTER sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS1YEARQUARTER sy-vline 
WA_PSDSI3CD2_STR-NEXT1YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS1YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS2YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS3YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS4YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS5YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS6YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS7YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS13YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS14YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS15YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS16YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS17YEARMONTH sy-vline 
WA_PSDSI3CD2_STR-PREVIOUS18YEARMONTH sy-vline      INTO ld_text SEPARATED BY SPACE.

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