ABAP Select data from SAP table /SCMTMS/S_DG_INFO_FIELDS 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_DG_INFO_FIELDS 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_DG_INFO_FIELDS. 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_DG_INFO_FIELDS 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_DG_INFO_FIELDS TYPE STANDARD TABLE OF /SCMTMS/S_DG_INFO_FIELDS,
      WA_/SCMTMS/S_DG_INFO_FIELDS TYPE /SCMTMS/S_DG_INFO_FIELDS,
      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_DG_INFO_FIELDS> TYPE /SCMTMS/S_DG_INFO_FIELDS.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCMTMS/S_DG_INFO_FIELDS
*  INTO TABLE @DATA(IT_/SCMTMS/S_DG_INFO_FIELDS2).
*--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_DG_INFO_FIELDS INDEX 1 INTO DATA(WA_/SCMTMS/S_DG_INFO_FIELDS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCMTMS/S_DG_INFO_FIELDS>-DGMOT = 1.
</SCMTMS/S_DG_INFO_FIELDS>-CLASS = 1.
</SCMTMS/S_DG_INFO_FIELDS>-ID_NUMBER_TYPE = 1.
</SCMTMS/S_DG_INFO_FIELDS>-ID_NUMBER = 1.
</SCMTMS/S_DG_INFO_FIELDS>-SUBCLASS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCMTMS/S_DG_INFO_FIELDS-HAZARD_CODE, sy-vline,
  WA_/SCMTMS/S_DG_INFO_FIELDS-PACK_GROUP, sy-vline,
  WA_/SCMTMS/S_DG_INFO_FIELDS-FLASHPOINT_TEMP, sy-vline,
  WA_/SCMTMS/S_DG_INFO_FIELDS-FLASHPOINT_TEMP_UNIT, sy-vline,
  WA_/SCMTMS/S_DG_INFO_FIELDS-TREMCARD_NUMBER, sy-vline,
  WA_/SCMTMS/S_DG_INFO_FIELDS-PROPER_SHIPPING_NAME, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCMTMS/S_DG_INFO_FIELDS 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_DG_INFO_FIELDS 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_DG_INFO_FIELDS INTO WA_/SCMTMS/S_DG_INFO_FIELDS.


*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 CUNIT, internal->external for field FLASHPOINT_TEMP_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCMTMS/S_DG_INFO_FIELDS-FLASHPOINT_TEMP_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCMTMS/S_DG_INFO_FIELDS-FLASHPOINT_TEMP_UNIT.
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_DG_INFO_FIELDS_STR, 
DGMOT TYPE STRING,
CLASS TYPE STRING,
ID_NUMBER_TYPE TYPE STRING,
ID_NUMBER TYPE STRING,
SUBCLASS TYPE STRING,
HAZARD_CODE TYPE STRING,
PACK_GROUP TYPE STRING,
FLASHPOINT_TEMP TYPE STRING,
FLASHPOINT_TEMP_UNIT TYPE STRING,
TREMCARD_NUMBER TYPE STRING,
PROPER_SHIPPING_NAME TYPE STRING,
TRANSP_MEANS_CAT_CODE TYPE STRING,
PACKAGING_INST_CODE TYPE STRING,
DG_LABEL_CODE_01 TYPE STRING,
DG_LABEL_CODE_02 TYPE STRING,
DG_LABEL_CODE_03 TYPE STRING,
DG_LABEL_CODE_04 TYPE STRING,
DG_LABEL_CODE_05 TYPE STRING,
DG_LABEL_CODE_06 TYPE STRING,
DG_LABEL_CODE_07 TYPE STRING,
TUNNEL_CODE TYPE STRING,
AIR_CARGO_ONLY TYPE STRING,
HAZARD_IND_SUBST_1 TYPE STRING,
HAZARD_IND_SUBST_2 TYPE STRING,
DG_DESCRIPTION TYPE STRING,
WATER_POLL_CLASS TYPE STRING,
TRANSPORT_CATEGORY TYPE STRING,
VARIANT_ID TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCMTMS/S_DG_INFO_FIELDS_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_DG_INFO_FIELDS_STR-DGMOT sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-CLASS sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-ID_NUMBER_TYPE sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-ID_NUMBER sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-SUBCLASS sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-HAZARD_CODE sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-PACK_GROUP sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-FLASHPOINT_TEMP sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-FLASHPOINT_TEMP_UNIT sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-TREMCARD_NUMBER sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-PROPER_SHIPPING_NAME sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-TRANSP_MEANS_CAT_CODE sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-PACKAGING_INST_CODE sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_01 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_02 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_03 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_04 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_05 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_06 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_LABEL_CODE_07 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-TUNNEL_CODE sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-AIR_CARGO_ONLY sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-HAZARD_IND_SUBST_1 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-HAZARD_IND_SUBST_2 sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-DG_DESCRIPTION sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-WATER_POLL_CLASS sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-TRANSPORT_CATEGORY sy-vline 
WA_/SCMTMS/S_DG_INFO_FIELDS_STR-VARIANT_ID sy-vline      INTO ld_text SEPARATED BY SPACE.

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