ABAP Select data from SAP table DETAIL_ONLY_SUBSTITUTION_MNT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DETAIL_ONLY_SUBSTITUTION_MNT
*  INTO TABLE @DATA(IT_DETAIL_ONLY_SUBSTITUTION_MNT2).
*--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_DETAIL_ONLY_SUBSTITUTION_MNT INDEX 1 INTO DATA(WA_DETAIL_ONLY_SUBSTITUTION_MNT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DETAIL_ONLY_SUBSTITUTION_MNT>-VPLANS = 1.
<DETAIL_ONLY_SUBSTITUTION_MNT>-VWORKC = 1.
<DETAIL_ONLY_SUBSTITUTION_MNT>-ALTPB = 1.
<DETAIL_ONLY_SUBSTITUTION_MNT>-ALTPE = 1.
<DETAIL_ONLY_SUBSTITUTION_MNT>-ALTPV = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DETAIL_ONLY_SUBSTITUTION_MNT-ALTPD, sy-vline,
  WA_DETAIL_ONLY_SUBSTITUTION_MNT-UVBEG, sy-vline,
  WA_DETAIL_ONLY_SUBSTITUTION_MNT-UVEND, sy-vline,
  WA_DETAIL_ONLY_SUBSTITUTION_MNT-UVVTK, sy-vline,
  WA_DETAIL_ONLY_SUBSTITUTION_MNT-UVDAY, sy-vline,
ENDLOOP.
   
*Add any further fields from structure WA_DETAIL_ONLY_SUBSTITUTION_MNT 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_DETAIL_ONLY_SUBSTITUTION_MNT 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_DETAIL_ONLY_SUBSTITUTION_MNT INTO WA_DETAIL_ONLY_SUBSTITUTION_MNT.


*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_DETAIL_ONLY_SUBSTITUTION_MNT_STR, 
VPLANS TYPE STRING,
VWORKC TYPE STRING,
ALTPB TYPE STRING,
ALTPE TYPE STRING,
ALTPV TYPE STRING,
ALTPD TYPE STRING,
UVBEG TYPE STRING,
UVEND TYPE STRING,
UVVTK TYPE STRING,
UVDAY TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DETAIL_ONLY_SUBSTITUTION_MNT_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_DETAIL_ONLY_SUBSTITUTION_MNT_STR-VPLANS sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-VWORKC sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-ALTPB sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-ALTPE sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-ALTPV sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-ALTPD sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-UVBEG sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-UVEND sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-UVVTK sy-vline 
WA_DETAIL_ONLY_SUBSTITUTION_MNT_STR-UVDAY sy-vline      INTO ld_text SEPARATED BY SPACE.

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