ABAP Select data from SAP table MTE_S_MILEAGE into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MTE_S_MILEAGE
*  INTO TABLE @DATA(IT_MTE_S_MILEAGE2).
*--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_MTE_S_MILEAGE INDEX 1 INTO DATA(WA_MTE_S_MILEAGE2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MTE_S_MILEAGE>-PERNR = 1.
<MTE_S_MILEAGE>-TRIPNO = 1.
<MTE_S_MILEAGE>-MOREI = 1.
<MTE_S_MILEAGE>-CRITICALITY = 1.
<MTE_S_MILEAGE>-CALCULATEDAMOUNT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MTE_S_MILEAGE-CURRENCY, sy-vline,
  WA_MTE_S_MILEAGE-DISTANCE_UNIT, sy-vline,
  WA_MTE_S_MILEAGE-WEIGHT_UNIT, sy-vline,
  WA_MTE_S_MILEAGE-COUNTRY_REGION_NAME2, sy-vline,
  WA_MTE_S_MILEAGE-COUNTRY_NAME2, sy-vline,
  WA_MTE_S_MILEAGE-DISPLAY_MODE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MTE_S_MILEAGE 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_MTE_S_MILEAGE 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_MTE_S_MILEAGE INTO WA_MTE_S_MILEAGE.


*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 DISTANCE_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-DISTANCE_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-DISTANCE_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field WEIGHT_UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-WEIGHT_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-WEIGHT_UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNRAD1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-ADRNRAD1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-ADRNRAD1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CITY_CODEAD1
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-CITY_CODEAD1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-CITY_CODEAD1.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ADRNRAD2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-ADRNRAD2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-ADRNRAD2.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field CITY_CODEAD2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MTE_S_MILEAGE-CITY_CODEAD2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MTE_S_MILEAGE-CITY_CODEAD2.
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_MTE_S_MILEAGE_STR, 
PERNR TYPE STRING,
TRIPNO TYPE STRING,
MOREI TYPE STRING,
CRITICALITY TYPE STRING,
CALCULATEDAMOUNT TYPE STRING,
CURRENCY TYPE STRING,
DISTANCE_UNIT TYPE STRING,
WEIGHT_UNIT TYPE STRING,
COUNTRY_REGION_NAME2 TYPE STRING,
COUNTRY_NAME2 TYPE STRING,
DISPLAY_MODE TYPE STRING,
EDIT_VISIBLE TYPE STRING,
KEY_MILE TYPE STRING,
MIL_DATE TYPE STRING,
M_TOTAL TYPE STRING,
M_DOMEST TYPE STRING,
LIC_PLAT TYPE STRING,
CAR_MAKE TYPE STRING,
PASSENGE TYPE STRING,
BAG_WGHT TYPE STRING,
ADD_FLRA TYPE STRING,
VEH_TYPE TYPE STRING,
VEH_CLAS TYPE STRING,
COUNTRY TYPE STRING,
REGION TYPE STRING,
LOC_FROM TYPE STRING,
LOC_TO TYPE STRING,
TT_COMSP TYPE STRING,
M_ACC_DOM TYPE STRING,
M_ACC_ABR TYPE STRING,
ADD_INFO TYPE STRING,
DISPLAY_ONLY TYPE STRING,
EDITOR TYPE STRING,
COMPUTED_DIST TYPE STRING,
ROUND_TRIP TYPE STRING,
CONSUMPTION_TYPE TYPE STRING,
FUEL_RCPT_EXIST TYPE STRING,
FUEL_PRICE TYPE STRING,
FUEL_PRICE_CURR TYPE STRING,
ADRNRAD1 TYPE STRING,
CITYAD1 TYPE STRING,
CITY_DISTRICTAD1 TYPE STRING,
POST_CODEAD1 TYPE STRING,
CITY_CODEAD1 TYPE STRING,
STREETAD1 TYPE STRING,
HOUSE_NUMAD1 TYPE STRING,
COUNTRYAD1 TYPE STRING,
REGIONAD1 TYPE STRING,
ADRNRAD2 TYPE STRING,
CITYAD2 TYPE STRING,
CITY_DISTRICTAD2 TYPE STRING,
POST_CODEAD2 TYPE STRING,
CITY_CODEAD2 TYPE STRING,
STREETAD2 TYPE STRING,
HOUSE_NUMAD2 TYPE STRING,
COUNTRYAD2 TYPE STRING,
REGIONAD2 TYPE STRING,
VEH_TYPE_NAME TYPE STRING,
VEH_CLAS_NAME TYPE STRING,
COUNTRY_REGION_NAME TYPE STRING,
TT_COMSP_NAME TYPE STRING,
KEY_STOP_NAME TYPE STRING,
ENTERPRISETYPE_FC TYPE STRING,
ISROUNDTRIP_FC TYPE STRING,
PASSENGERS_FC TYPE STRING,
TOTALDISTANCE_FC TYPE STRING,
VEHICLECLASS_FC TYPE STRING,
VEHICLETYPE_FC TYPE STRING,
LICENSEPLATE_FC TYPE STRING,
DOMESTICDISTANCE_FC TYPE STRING,
MILEAGEDATE_FC TYPE STRING,
CARMODEL_FC TYPE STRING,
CALCULATEDDISTANCE_FC TYPE STRING,
ADDITIONALINFO_FC TYPE STRING,
ADDITIONALFLATRATE_FC TYPE STRING,
WEIGHT_FC TYPE STRING,
MEMO_FC TYPE STRING,
MILEAGENUMBER_FC TYPE STRING,
FROMPERDIEMREGION_FC TYPE STRING,
TOPERDIEMREGION_FC TYPE STRING,
ASSIGN_FROM_DESTINATION TYPE STRING,
FROMLOCATION_FC TYPE STRING,
TOLOCATION_FC TYPE STRING,
COUNTRY_FC TYPE STRING,
REGION_FC TYPE STRING,
ADRNRAD1_FC TYPE STRING,
ADRNRAD2_FC TYPE STRING,
CITYAD1_FC TYPE STRING,
CITYAD2_FC TYPE STRING,
CITYCODEAD1_FC TYPE STRING,
CITYCODEAD2_FC TYPE STRING,
CITYDISTRICTAD1_FC TYPE STRING,
CITYDISTRICTAD2_FC TYPE STRING,
COUNTRYAD1_FC TYPE STRING,
COUNTRYAD2_FC TYPE STRING,
HOUSENUMAD1_FC TYPE STRING,
HOUSENUMAD2_FC TYPE STRING,
POSTCODEAD1_FC TYPE STRING,
POSTCODEAD2_FC TYPE STRING,
REGIONAD1_FC TYPE STRING,
REGIONAD2_FC TYPE STRING,
STREETAD1_FC TYPE STRING,
STREETAD2_FC TYPE STRING,
CONSUMPTION_TYPE_FC TYPE STRING,
FUEL_RCPT_EXIST_FC TYPE STRING,
FUEL_PRICE_FC TYPE STRING,
FUEL_PRICE_CURR_FC TYPE STRING,
HIDDEN_COST_ASSIGNMENT TYPE STRING,
HIDDEN_DESTINATION TYPE STRING,
HIDDEN_VEHICULE TYPE STRING,
DUMMY_MILEAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MTE_S_MILEAGE_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_MTE_S_MILEAGE_STR-PERNR sy-vline 
WA_MTE_S_MILEAGE_STR-TRIPNO sy-vline 
WA_MTE_S_MILEAGE_STR-MOREI sy-vline 
WA_MTE_S_MILEAGE_STR-CRITICALITY sy-vline 
WA_MTE_S_MILEAGE_STR-CALCULATEDAMOUNT sy-vline 
WA_MTE_S_MILEAGE_STR-CURRENCY sy-vline 
WA_MTE_S_MILEAGE_STR-DISTANCE_UNIT sy-vline 
WA_MTE_S_MILEAGE_STR-WEIGHT_UNIT sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRY_REGION_NAME2 sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRY_NAME2 sy-vline 
WA_MTE_S_MILEAGE_STR-DISPLAY_MODE sy-vline 
WA_MTE_S_MILEAGE_STR-EDIT_VISIBLE sy-vline 
WA_MTE_S_MILEAGE_STR-KEY_MILE sy-vline 
WA_MTE_S_MILEAGE_STR-MIL_DATE sy-vline 
WA_MTE_S_MILEAGE_STR-M_TOTAL sy-vline 
WA_MTE_S_MILEAGE_STR-M_DOMEST sy-vline 
WA_MTE_S_MILEAGE_STR-LIC_PLAT sy-vline 
WA_MTE_S_MILEAGE_STR-CAR_MAKE sy-vline 
WA_MTE_S_MILEAGE_STR-PASSENGE sy-vline 
WA_MTE_S_MILEAGE_STR-BAG_WGHT sy-vline 
WA_MTE_S_MILEAGE_STR-ADD_FLRA sy-vline 
WA_MTE_S_MILEAGE_STR-VEH_TYPE sy-vline 
WA_MTE_S_MILEAGE_STR-VEH_CLAS sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRY sy-vline 
WA_MTE_S_MILEAGE_STR-REGION sy-vline 
WA_MTE_S_MILEAGE_STR-LOC_FROM sy-vline 
WA_MTE_S_MILEAGE_STR-LOC_TO sy-vline 
WA_MTE_S_MILEAGE_STR-TT_COMSP sy-vline 
WA_MTE_S_MILEAGE_STR-M_ACC_DOM sy-vline 
WA_MTE_S_MILEAGE_STR-M_ACC_ABR sy-vline 
WA_MTE_S_MILEAGE_STR-ADD_INFO sy-vline 
WA_MTE_S_MILEAGE_STR-DISPLAY_ONLY sy-vline 
WA_MTE_S_MILEAGE_STR-EDITOR sy-vline 
WA_MTE_S_MILEAGE_STR-COMPUTED_DIST sy-vline 
WA_MTE_S_MILEAGE_STR-ROUND_TRIP sy-vline 
WA_MTE_S_MILEAGE_STR-CONSUMPTION_TYPE sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_RCPT_EXIST sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_PRICE sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_PRICE_CURR sy-vline 
WA_MTE_S_MILEAGE_STR-ADRNRAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-CITYAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-CITY_DISTRICTAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-POST_CODEAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-CITY_CODEAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-STREETAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-HOUSE_NUMAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRYAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-REGIONAD1 sy-vline 
WA_MTE_S_MILEAGE_STR-ADRNRAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-CITYAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-CITY_DISTRICTAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-POST_CODEAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-CITY_CODEAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-STREETAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-HOUSE_NUMAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRYAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-REGIONAD2 sy-vline 
WA_MTE_S_MILEAGE_STR-VEH_TYPE_NAME sy-vline 
WA_MTE_S_MILEAGE_STR-VEH_CLAS_NAME sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRY_REGION_NAME sy-vline 
WA_MTE_S_MILEAGE_STR-TT_COMSP_NAME sy-vline 
WA_MTE_S_MILEAGE_STR-KEY_STOP_NAME sy-vline 
WA_MTE_S_MILEAGE_STR-ENTERPRISETYPE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ISROUNDTRIP_FC sy-vline 
WA_MTE_S_MILEAGE_STR-PASSENGERS_FC sy-vline 
WA_MTE_S_MILEAGE_STR-TOTALDISTANCE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-VEHICLECLASS_FC sy-vline 
WA_MTE_S_MILEAGE_STR-VEHICLETYPE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-LICENSEPLATE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-DOMESTICDISTANCE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-MILEAGEDATE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CARMODEL_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CALCULATEDDISTANCE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ADDITIONALINFO_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ADDITIONALFLATRATE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-WEIGHT_FC sy-vline 
WA_MTE_S_MILEAGE_STR-MEMO_FC sy-vline 
WA_MTE_S_MILEAGE_STR-MILEAGENUMBER_FC sy-vline 
WA_MTE_S_MILEAGE_STR-FROMPERDIEMREGION_FC sy-vline 
WA_MTE_S_MILEAGE_STR-TOPERDIEMREGION_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ASSIGN_FROM_DESTINATION sy-vline 
WA_MTE_S_MILEAGE_STR-FROMLOCATION_FC sy-vline 
WA_MTE_S_MILEAGE_STR-TOLOCATION_FC sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRY_FC sy-vline 
WA_MTE_S_MILEAGE_STR-REGION_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ADRNRAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-ADRNRAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYCODEAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYCODEAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYDISTRICTAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CITYDISTRICTAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRYAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-COUNTRYAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-HOUSENUMAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-HOUSENUMAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-POSTCODEAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-POSTCODEAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-REGIONAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-REGIONAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-STREETAD1_FC sy-vline 
WA_MTE_S_MILEAGE_STR-STREETAD2_FC sy-vline 
WA_MTE_S_MILEAGE_STR-CONSUMPTION_TYPE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_RCPT_EXIST_FC sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_PRICE_FC sy-vline 
WA_MTE_S_MILEAGE_STR-FUEL_PRICE_CURR_FC sy-vline 
WA_MTE_S_MILEAGE_STR-HIDDEN_COST_ASSIGNMENT sy-vline 
WA_MTE_S_MILEAGE_STR-HIDDEN_DESTINATION sy-vline 
WA_MTE_S_MILEAGE_STR-HIDDEN_VEHICULE sy-vline 
WA_MTE_S_MILEAGE_STR-DUMMY_MILEAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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