ABAP Select data from SAP table /SCMTMS/S_MEANS_OF_TRANSPORT_K into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCMTMS/S_MEANS_OF_TRANSPORT_K 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 /SCMTMS/S_MEANS_OF_TRANSPORT_K. 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 /SCMTMS/S_MEANS_OF_TRANSPORT_K 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_/SCMTMS/S_MEANS_OF_TRANSPORT_K TYPE STANDARD TABLE OF /SCMTMS/S_MEANS_OF_TRANSPORT_K,
      WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K TYPE /SCMTMS/S_MEANS_OF_TRANSPORT_K,
      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: </SCMTMS/S_MEANS_OF_TRANSPORT_K> TYPE /SCMTMS/S_MEANS_OF_TRANSPORT_K.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCMTMS/S_MEANS_OF_TRANSPORT_K
  INTO TABLE IT_/SCMTMS/S_MEANS_OF_TRANSPORT_K.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCMTMS/S_MEANS_OF_TRANSPORT_K
*  INTO TABLE @DATA(IT_/SCMTMS/S_MEANS_OF_TRANSPORT_K2).
*--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_/SCMTMS/S_MEANS_OF_TRANSPORT_K INDEX 1 INTO DATA(WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCMTMS/S_MEANS_OF_TRANSPORT_K ASSIGNING </SCMTMS/S_MEANS_OF_TRANSPORT_K>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCMTMS/S_MEANS_OF_TRANSPORT_K>-KEY = 1.
</SCMTMS/S_MEANS_OF_TRANSPORT_K>-PARENT_KEY = 1.
</SCMTMS/S_MEANS_OF_TRANSPORT_K>-ROOT_KEY = 1.
</SCMTMS/S_MEANS_OF_TRANSPORT_K>-MTRTCO062_I = 1.
</SCMTMS/S_MEANS_OF_TRANSPORT_K>-MOTSCODE = 1.

ENDLOOP.

LOOP AT IT_/SCMTMS/S_MEANS_OF_TRANSPORT_K INTO WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-AVGVEL, sy-vline,
  WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-DISTFAC, sy-vline,
  WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-AVGWTIME, sy-vline,
  WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-TRMODE, sy-vline,
  WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-OWNTTYPFLG, sy-vline,
  WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-TTCONNFLG, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K 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_/SCMTMS/S_MEANS_OF_TRANSPORT_K 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_/SCMTMS/S_MEANS_OF_TRANSPORT_K INTO WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K.


*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.

*Conversion exit TSTRN, internal->external for field AVGWTIME
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-AVGWTIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-AVGWTIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field COUPLE_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-COUPLE_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-COUPLE_TIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTRN, internal->external for field UNCOUPLE_TIME
CALL FUNCTION 'CONVERSION_EXIT_TSTRN_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-UNCOUPLE_TIME
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-UNCOUPLE_TIME.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field EXT_TTYPE_NUM
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-EXT_TTYPE_NUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K-EXT_TTYPE_NUM.
WRITE:/ 'New Value:', ld_input.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR, 
KEY TYPE STRING,
PARENT_KEY TYPE STRING,
ROOT_KEY TYPE STRING,
MTRTCO062_I TYPE STRING,
MOTSCODE TYPE STRING,
AVGVEL TYPE STRING,
DISTFAC TYPE STRING,
AVGWTIME TYPE STRING,
TRMODE TYPE STRING,
OWNTTYPFLG TYPE STRING,
TTCONNFLG TYPE STRING,
IGS_QUALITY TYPE STRING,
VELO_LOW TYPE STRING,
VELO_MEDIUM TYPE STRING,
VELO_HIGH TYPE STRING,
TTYPE_PARENT TYPE STRING,
PASSIVE TYPE STRING,
NO_CAPACITY TYPE STRING,
NO_DIRECT_LOAD TYPE STRING,
COUPLE_TIME TYPE STRING,
UNCOUPLE_TIME TYPE STRING,
EXT_TTYPE_FLG TYPE STRING,
EXT_TTYPE_NUM TYPE STRING,
LOCK_MULTIRES TYPE STRING,
TRMODCODE TYPE STRING,
TRMODECAT TYPE STRING,
DGMOT TYPE STRING,
FLAG_DEFAULT_MTR TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_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_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-KEY sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-PARENT_KEY sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-ROOT_KEY sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-MTRTCO062_I sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-MOTSCODE sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-AVGVEL sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-DISTFAC sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-AVGWTIME sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-TRMODE sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-OWNTTYPFLG sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-TTCONNFLG sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-IGS_QUALITY sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-VELO_LOW sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-VELO_MEDIUM sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-VELO_HIGH sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-TTYPE_PARENT sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-PASSIVE sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-NO_CAPACITY sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-NO_DIRECT_LOAD sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-COUPLE_TIME sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-UNCOUPLE_TIME sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-EXT_TTYPE_FLG sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-EXT_TTYPE_NUM sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-LOCK_MULTIRES sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-TRMODCODE sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-TRMODECAT sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-DGMOT sy-vline 
WA_/SCMTMS/S_MEANS_OF_TRANSPORT_K_STR-FLAG_DEFAULT_MTR sy-vline      INTO ld_text SEPARATED BY SPACE.

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