ABAP Select data from SAP table MCIFLEET_COUNTER into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCIFLEET_COUNTER
*  INTO TABLE @DATA(IT_MCIFLEET_COUNTER2).
*--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_MCIFLEET_COUNTER INDEX 1 INTO DATA(WA_MCIFLEET_COUNTER2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCIFLEET_COUNTER>-PMIS_FUEL = 1.
<MCIFLEET_COUNTER>-PMIS_DIST = 1.
<MCIFLEET_COUNTER>-PMIS_TIME = 1.
<MCIFLEET_COUNTER>-PMIS_MASS = 1.
<MCIFLEET_COUNTER>-IAMENDISTT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCIFLEET_COUNTER-IAMENOPHRS, sy-vline,
  WA_MCIFLEET_COUNTER-IAMENFLVOL, sy-vline,
  WA_MCIFLEET_COUNTER-IAMENFLMSS, sy-vline,
  WA_MCIFLEET_COUNTER-IAFUELDIST, sy-vline,
  WA_MCIFLEET_COUNTER-IAFUELTIME, sy-vline,
  WA_MCIFLEET_COUNTER-IAMASSDIST, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCIFLEET_COUNTER 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_MCIFLEET_COUNTER 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_MCIFLEET_COUNTER INTO WA_MCIFLEET_COUNTER.


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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field CTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCIFLEET_COUNTER-CTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCIFLEET_COUNTER-CTUNIT.
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_MCIFLEET_COUNTER_STR, 
PMIS_FUEL TYPE STRING,
PMIS_DIST TYPE STRING,
PMIS_TIME TYPE STRING,
PMIS_MASS TYPE STRING,
IAMENDISTT TYPE STRING,
IAMENOPHRS TYPE STRING,
IAMENFLVOL TYPE STRING,
IAMENFLMSS TYPE STRING,
IAFUELDIST TYPE STRING,
IAFUELTIME TYPE STRING,
IAMASSDIST TYPE STRING,
IAMASSTIME TYPE STRING,
IATTLCDIST TYPE STRING,
IATTLCOPTM TYPE STRING,
DUNIT TYPE STRING,
TUNIT TYPE STRING,
FUNIT TYPE STRING,
MUNIT TYPE STRING,
FDUNIT TYPE STRING,
FTUNIT TYPE STRING,
MTUNIT TYPE STRING,
MDUNIT TYPE STRING,
CDUNIT TYPE STRING,
CTUNIT TYPE STRING,
UNSYS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MCIFLEET_COUNTER_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_MCIFLEET_COUNTER_STR-PMIS_FUEL sy-vline 
WA_MCIFLEET_COUNTER_STR-PMIS_DIST sy-vline 
WA_MCIFLEET_COUNTER_STR-PMIS_TIME sy-vline 
WA_MCIFLEET_COUNTER_STR-PMIS_MASS sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMENDISTT sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMENOPHRS sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMENFLVOL sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMENFLMSS sy-vline 
WA_MCIFLEET_COUNTER_STR-IAFUELDIST sy-vline 
WA_MCIFLEET_COUNTER_STR-IAFUELTIME sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMASSDIST sy-vline 
WA_MCIFLEET_COUNTER_STR-IAMASSTIME sy-vline 
WA_MCIFLEET_COUNTER_STR-IATTLCDIST sy-vline 
WA_MCIFLEET_COUNTER_STR-IATTLCOPTM sy-vline 
WA_MCIFLEET_COUNTER_STR-DUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-TUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-FUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-MUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-FDUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-FTUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-MTUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-MDUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-CDUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-CTUNIT sy-vline 
WA_MCIFLEET_COUNTER_STR-UNSYS sy-vline      INTO ld_text SEPARATED BY SPACE.

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