ABAP Select data from SAP table MCIFLEET into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP MCIFLEET 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. 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 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 TYPE STANDARD TABLE OF MCIFLEET,
      WA_MCIFLEET TYPE MCIFLEET,
      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> TYPE MCIFLEET.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MCIFLEET
*  INTO TABLE @DATA(IT_MCIFLEET2).
*--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 INDEX 1 INTO DATA(WA_MCIFLEET2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MCIFLEET>-FLEET_NUM = 1.
<MCIFLEET>-FLEET_VIN = 1.
<MCIFLEET>-CHASIS_NUM = 1.
<MCIFLEET>-LICENS_NUM = 1.
<MCIFLEET>-PRI_CALC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MCIFLEET-NUM_AXLE, sy-vline,
  WA_MCIFLEET-MAX_OCCUP, sy-vline,
  WA_MCIFLEET-FLEET_USE, sy-vline,
  WA_MCIFLEET-ENG_TYPE, sy-vline,
  WA_MCIFLEET-ENG_POWER, sy-vline,
  WA_MCIFLEET-UNIT_POWER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MCIFLEET 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 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 INTO WA_MCIFLEET.


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

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit CUNIT, internal->external for field CTUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MCIFLEET-CTUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MCIFLEET-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_STR, 
FLEET_NUM TYPE STRING,
FLEET_VIN TYPE STRING,
CHASIS_NUM TYPE STRING,
LICENS_NUM TYPE STRING,
PRI_CALC TYPE STRING,
NUM_AXLE TYPE STRING,
MAX_OCCUP TYPE STRING,
FLEET_USE TYPE STRING,
ENG_TYPE TYPE STRING,
ENG_POWER TYPE STRING,
UNIT_POWER TYPE STRING,
REVOLUTION TYPE STRING,
ENGINE_CYL TYPE STRING,
ENGINE_CAP TYPE STRING,
UNIT_CAP TYPE STRING,
FUEL_PRI TYPE STRING,
GROSS_WGT TYPE STRING,
GEWEI TYPE STRING,
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_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_STR-FLEET_NUM sy-vline 
WA_MCIFLEET_STR-FLEET_VIN sy-vline 
WA_MCIFLEET_STR-CHASIS_NUM sy-vline 
WA_MCIFLEET_STR-LICENS_NUM sy-vline 
WA_MCIFLEET_STR-PRI_CALC sy-vline 
WA_MCIFLEET_STR-NUM_AXLE sy-vline 
WA_MCIFLEET_STR-MAX_OCCUP sy-vline 
WA_MCIFLEET_STR-FLEET_USE sy-vline 
WA_MCIFLEET_STR-ENG_TYPE sy-vline 
WA_MCIFLEET_STR-ENG_POWER sy-vline 
WA_MCIFLEET_STR-UNIT_POWER sy-vline 
WA_MCIFLEET_STR-REVOLUTION sy-vline 
WA_MCIFLEET_STR-ENGINE_CYL sy-vline 
WA_MCIFLEET_STR-ENGINE_CAP sy-vline 
WA_MCIFLEET_STR-UNIT_CAP sy-vline 
WA_MCIFLEET_STR-FUEL_PRI sy-vline 
WA_MCIFLEET_STR-GROSS_WGT sy-vline 
WA_MCIFLEET_STR-GEWEI sy-vline 
WA_MCIFLEET_STR-PMIS_FUEL sy-vline 
WA_MCIFLEET_STR-PMIS_DIST sy-vline 
WA_MCIFLEET_STR-PMIS_TIME sy-vline 
WA_MCIFLEET_STR-PMIS_MASS sy-vline 
WA_MCIFLEET_STR-IAMENDISTT sy-vline 
WA_MCIFLEET_STR-IAMENOPHRS sy-vline 
WA_MCIFLEET_STR-IAMENFLVOL sy-vline 
WA_MCIFLEET_STR-IAMENFLMSS sy-vline 
WA_MCIFLEET_STR-IAFUELDIST sy-vline 
WA_MCIFLEET_STR-IAFUELTIME sy-vline 
WA_MCIFLEET_STR-IAMASSDIST sy-vline 
WA_MCIFLEET_STR-IAMASSTIME sy-vline 
WA_MCIFLEET_STR-IATTLCDIST sy-vline 
WA_MCIFLEET_STR-IATTLCOPTM sy-vline 
WA_MCIFLEET_STR-DUNIT sy-vline 
WA_MCIFLEET_STR-TUNIT sy-vline 
WA_MCIFLEET_STR-FUNIT sy-vline 
WA_MCIFLEET_STR-MUNIT sy-vline 
WA_MCIFLEET_STR-FDUNIT sy-vline 
WA_MCIFLEET_STR-FTUNIT sy-vline 
WA_MCIFLEET_STR-MTUNIT sy-vline 
WA_MCIFLEET_STR-MDUNIT sy-vline 
WA_MCIFLEET_STR-CDUNIT sy-vline 
WA_MCIFLEET_STR-CTUNIT sy-vline 
WA_MCIFLEET_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.