ABAP Select data from SAP table SCHEDSCHEME into internal table

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM SCHEDSCHEME
*  INTO TABLE @DATA(IT_SCHEDSCHEME2).
*--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_SCHEDSCHEME INDEX 1 INTO DATA(WA_SCHEDSCHEME2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<SCHEDSCHEME>-SCHEDLINE = 1.
<SCHEDSCHEME>-EVENTFROM = 1.
<SCHEDSCHEME>-DIRECTION = 1.
<SCHEDSCHEME>-DURATION = 1.
<SCHEDSCHEME>-EVENTTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_SCHEDSCHEME-COND1, sy-vline,
  WA_SCHEDSCHEME-COND2EVENTA, sy-vline,
  WA_SCHEDSCHEME-COND2OP, sy-vline,
  WA_SCHEDSCHEME-COND2EVENTB, sy-vline,
  WA_SCHEDSCHEME-COND2RESULT, sy-vline,
  WA_SCHEDSCHEME-EVENTMIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_SCHEDSCHEME 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_SCHEDSCHEME 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_SCHEDSCHEME INTO WA_SCHEDSCHEME.


*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_SCHEDSCHEME_STR, 
SCHEDLINE TYPE STRING,
EVENTFROM TYPE STRING,
DIRECTION TYPE STRING,
DURATION TYPE STRING,
EVENTTO TYPE STRING,
COND1 TYPE STRING,
COND2EVENTA TYPE STRING,
COND2OP TYPE STRING,
COND2EVENTB TYPE STRING,
COND2RESULT TYPE STRING,
EVENTMIN TYPE STRING,
EVENTMAX TYPE STRING,
EVENTSUBT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_SCHEDSCHEME_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_SCHEDSCHEME_STR-SCHEDLINE sy-vline 
WA_SCHEDSCHEME_STR-EVENTFROM sy-vline 
WA_SCHEDSCHEME_STR-DIRECTION sy-vline 
WA_SCHEDSCHEME_STR-DURATION sy-vline 
WA_SCHEDSCHEME_STR-EVENTTO sy-vline 
WA_SCHEDSCHEME_STR-COND1 sy-vline 
WA_SCHEDSCHEME_STR-COND2EVENTA sy-vline 
WA_SCHEDSCHEME_STR-COND2OP sy-vline 
WA_SCHEDSCHEME_STR-COND2EVENTB sy-vline 
WA_SCHEDSCHEME_STR-COND2RESULT sy-vline 
WA_SCHEDSCHEME_STR-EVENTMIN sy-vline 
WA_SCHEDSCHEME_STR-EVENTMAX sy-vline 
WA_SCHEDSCHEME_STR-EVENTSUBT sy-vline      INTO ld_text SEPARATED BY SPACE.

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