ABAP Select data from SAP table REORC_RESERVATION_OBJTYPE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REORC_RESERVATION_OBJTYPE
*  INTO TABLE @DATA(IT_REORC_RESERVATION_OBJTYPE2).
*--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_REORC_RESERVATION_OBJTYPE INDEX 1 INTO DATA(WA_REORC_RESERVATION_OBJTYPE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REORC_RESERVATION_OBJTYPE>-MANDT = 1.
<REORC_RESERVATION_OBJTYPE>-RSOBJTYPE = 1.
<REORC_RESERVATION_OBJTYPE>-ORTYPE = 1.
<REORC_RESERVATION_OBJTYPE>-MINTIMEUNIT = 1.
<REORC_RESERVATION_OBJTYPE>-EXTINTIND = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REORC_RESERVATION_OBJTYPE-SETTLEIND, sy-vline,
  WA_REORC_RESERVATION_OBJTYPE-DEFROLEOCCUPANT, sy-vline,
  WA_REORC_RESERVATION_OBJTYPE-DEFROLERSRESPONS, sy-vline,
  WA_REORC_RESERVATION_OBJTYPE-AOTYPE1, sy-vline,
  WA_REORC_RESERVATION_OBJTYPE-AOTYPE2, sy-vline,
  WA_REORC_RESERVATION_OBJTYPE-AOTYPE3, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REORC_RESERVATION_OBJTYPE 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_REORC_RESERVATION_OBJTYPE 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_REORC_RESERVATION_OBJTYPE INTO WA_REORC_RESERVATION_OBJTYPE.


*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_REORC_RESERVATION_OBJTYPE_STR, 
MANDT TYPE STRING,
RSOBJTYPE TYPE STRING,
ORTYPE TYPE STRING,
MINTIMEUNIT TYPE STRING,
EXTINTIND TYPE STRING,
SETTLEIND TYPE STRING,
DEFROLEOCCUPANT TYPE STRING,
DEFROLERSRESPONS TYPE STRING,
AOTYPE1 TYPE STRING,
AOTYPE2 TYPE STRING,
AOTYPE3 TYPE STRING,
RRTYPE TYPE STRING,
VARNR TYPE STRING,
FREQUENCY TYPE STRING,
FREQUENCYUNIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REORC_RESERVATION_OBJTYPE_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_REORC_RESERVATION_OBJTYPE_STR-MANDT sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-RSOBJTYPE sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-ORTYPE sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-MINTIMEUNIT sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-EXTINTIND sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-SETTLEIND sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-DEFROLEOCCUPANT sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-DEFROLERSRESPONS sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-AOTYPE1 sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-AOTYPE2 sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-AOTYPE3 sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-RRTYPE sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-VARNR sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-FREQUENCY sy-vline 
WA_REORC_RESERVATION_OBJTYPE_STR-FREQUENCYUNIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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