ABAP Select data from SAP table PTRV_WEB_MILEAGE_INT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM PTRV_WEB_MILEAGE_INT
*  INTO TABLE @DATA(IT_PTRV_WEB_MILEAGE_INT2).
*--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_PTRV_WEB_MILEAGE_INT INDEX 1 INTO DATA(WA_PTRV_WEB_MILEAGE_INT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<PTRV_WEB_MILEAGE_INT>-KEY_MILE = 1.
<PTRV_WEB_MILEAGE_INT>-MIL_DATE = 1.
<PTRV_WEB_MILEAGE_INT>-M_TOTAL = 1.
<PTRV_WEB_MILEAGE_INT>-M_DOMEST = 1.
<PTRV_WEB_MILEAGE_INT>-LIC_PLAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_PTRV_WEB_MILEAGE_INT-CAR_MAKE, sy-vline,
  WA_PTRV_WEB_MILEAGE_INT-PASSENGE, sy-vline,
  WA_PTRV_WEB_MILEAGE_INT-BAG_WGHT, sy-vline,
  WA_PTRV_WEB_MILEAGE_INT-ADD_FLRA, sy-vline,
  WA_PTRV_WEB_MILEAGE_INT-VEH_TYPE, sy-vline,
  WA_PTRV_WEB_MILEAGE_INT-VEH_CLAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_PTRV_WEB_MILEAGE_INT 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_PTRV_WEB_MILEAGE_INT 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_PTRV_WEB_MILEAGE_INT INTO WA_PTRV_WEB_MILEAGE_INT.


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

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

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

*Conversion exit ALPHA, internal->external for field CITY_CODEAD2
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_PTRV_WEB_MILEAGE_INT-CITY_CODEAD2
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_PTRV_WEB_MILEAGE_INT-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_PTRV_WEB_MILEAGE_INT_STR, 
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,END OF T_EKKO_STR.
DATA: WA_PTRV_WEB_MILEAGE_INT_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_PTRV_WEB_MILEAGE_INT_STR-KEY_MILE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-MIL_DATE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-M_TOTAL sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-M_DOMEST sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-LIC_PLAT sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CAR_MAKE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-PASSENGE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-BAG_WGHT sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-ADD_FLRA sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-VEH_TYPE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-VEH_CLAS sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-COUNTRY sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-REGION sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-LOC_FROM sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-LOC_TO sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-TT_COMSP sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-M_ACC_DOM sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-M_ACC_ABR sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-ADD_INFO sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-DISPLAY_ONLY sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-EDITOR sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-COMPUTED_DIST sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-ROUND_TRIP sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CONSUMPTION_TYPE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-FUEL_RCPT_EXIST sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-FUEL_PRICE sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-FUEL_PRICE_CURR sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-ADRNRAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITYAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITY_DISTRICTAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-POST_CODEAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITY_CODEAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-STREETAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-HOUSE_NUMAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-COUNTRYAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-REGIONAD1 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-ADRNRAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITYAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITY_DISTRICTAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-POST_CODEAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-CITY_CODEAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-STREETAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-HOUSE_NUMAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-COUNTRYAD2 sy-vline 
WA_PTRV_WEB_MILEAGE_INT_STR-REGIONAD2 sy-vline      INTO ld_text SEPARATED BY SPACE.

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