ABAP Select data from SAP table MRMRSEG_TM into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MRMRSEG_TM
*  INTO TABLE @DATA(IT_MRMRSEG_TM2).
*--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_MRMRSEG_TM INDEX 1 INTO DATA(WA_MRMRSEG_TM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MRMRSEG_TM>-MANDT = 1.
<MRMRSEG_TM>-BELNR = 1.
<MRMRSEG_TM>-GJAHR = 1.
<MRMRSEG_TM>-BUZEI = 1.
<MRMRSEG_TM>-CLIENT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MRMRSEG_TM-PO_ID, sy-vline,
  WA_MRMRSEG_TM-PO_ITEM, sy-vline,
  WA_MRMRSEG_TM-TOR_ID, sy-vline,
  WA_MRMRSEG_TM-TOR_ITEM, sy-vline,
  WA_MRMRSEG_TM-TSP_ID, sy-vline,
  WA_MRMRSEG_TM-BOL_ID, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MRMRSEG_TM 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_MRMRSEG_TM 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_MRMRSEG_TM INTO WA_MRMRSEG_TM.


*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 BELNR
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRMRSEG_TM-BELNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRMRSEG_TM-BELNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit GJAHR, internal->external for field GJAHR
CALL FUNCTION 'CONVERSION_EXIT_GJAHR_OUTPUT'
  EXPORTING
    input =                      WA_MRMRSEG_TM-GJAHR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRMRSEG_TM-GJAHR.
WRITE:/ 'New Value:', ld_input.

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

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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field EQUIPMENT_TYPE
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_MRMRSEG_TM-EQUIPMENT_TYPE
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MRMRSEG_TM-EQUIPMENT_TYPE.
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_MRMRSEG_TM_STR, 
MANDT TYPE STRING,
BELNR TYPE STRING,
GJAHR TYPE STRING,
BUZEI TYPE STRING,
CLIENT TYPE STRING,
PO_ID TYPE STRING,
PO_ITEM TYPE STRING,
TOR_ID TYPE STRING,
TOR_ITEM TYPE STRING,
TSP_ID TYPE STRING,
BOL_ID TYPE STRING,
AWB_ID TYPE STRING,
FLIGHT_ID TYPE STRING,
VOYAGE_ID TYPE STRING,
SFIR_ID TYPE STRING,
SFIR_ITEM TYPE STRING,
IVP_ID TYPE STRING,
LOGSYS TYPE STRING,
SRCE_LOC TYPE STRING,
DEST_LOC TYPE STRING,
DEL_D TYPE STRING,
PICKUP_D TYPE STRING,
CPUDT TYPE STRING,
CPUTM TYPE STRING,
FREIGHTAGRMT_ID TYPE STRING,
LOADING_METER TYPE STRING,
DISTANCE TYPE STRING,
DIST_UOM TYPE STRING,
SHIPPER TYPE STRING,
CONSIGNEE TYPE STRING,
VEHICLE_ID TYPE STRING,
EQUIPMENT_TYPE TYPE STRING,
PRICING_IND TYPE STRING,
CHRG_DUE_CODE TYPE STRING,
SRCE_CTRY TYPE STRING,
DEST_CTRY TYPE STRING,
TOR_SRC_CTRY TYPE STRING,
TOR_DEST_CTRY TYPE STRING,
DUMMY TYPE STRING,
KZ TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MRMRSEG_TM_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_MRMRSEG_TM_STR-MANDT sy-vline 
WA_MRMRSEG_TM_STR-BELNR sy-vline 
WA_MRMRSEG_TM_STR-GJAHR sy-vline 
WA_MRMRSEG_TM_STR-BUZEI sy-vline 
WA_MRMRSEG_TM_STR-CLIENT sy-vline 
WA_MRMRSEG_TM_STR-PO_ID sy-vline 
WA_MRMRSEG_TM_STR-PO_ITEM sy-vline 
WA_MRMRSEG_TM_STR-TOR_ID sy-vline 
WA_MRMRSEG_TM_STR-TOR_ITEM sy-vline 
WA_MRMRSEG_TM_STR-TSP_ID sy-vline 
WA_MRMRSEG_TM_STR-BOL_ID sy-vline 
WA_MRMRSEG_TM_STR-AWB_ID sy-vline 
WA_MRMRSEG_TM_STR-FLIGHT_ID sy-vline 
WA_MRMRSEG_TM_STR-VOYAGE_ID sy-vline 
WA_MRMRSEG_TM_STR-SFIR_ID sy-vline 
WA_MRMRSEG_TM_STR-SFIR_ITEM sy-vline 
WA_MRMRSEG_TM_STR-IVP_ID sy-vline 
WA_MRMRSEG_TM_STR-LOGSYS sy-vline 
WA_MRMRSEG_TM_STR-SRCE_LOC sy-vline 
WA_MRMRSEG_TM_STR-DEST_LOC sy-vline 
WA_MRMRSEG_TM_STR-DEL_D sy-vline 
WA_MRMRSEG_TM_STR-PICKUP_D sy-vline 
WA_MRMRSEG_TM_STR-CPUDT sy-vline 
WA_MRMRSEG_TM_STR-CPUTM sy-vline 
WA_MRMRSEG_TM_STR-FREIGHTAGRMT_ID sy-vline 
WA_MRMRSEG_TM_STR-LOADING_METER sy-vline 
WA_MRMRSEG_TM_STR-DISTANCE sy-vline 
WA_MRMRSEG_TM_STR-DIST_UOM sy-vline 
WA_MRMRSEG_TM_STR-SHIPPER sy-vline 
WA_MRMRSEG_TM_STR-CONSIGNEE sy-vline 
WA_MRMRSEG_TM_STR-VEHICLE_ID sy-vline 
WA_MRMRSEG_TM_STR-EQUIPMENT_TYPE sy-vline 
WA_MRMRSEG_TM_STR-PRICING_IND sy-vline 
WA_MRMRSEG_TM_STR-CHRG_DUE_CODE sy-vline 
WA_MRMRSEG_TM_STR-SRCE_CTRY sy-vline 
WA_MRMRSEG_TM_STR-DEST_CTRY sy-vline 
WA_MRMRSEG_TM_STR-TOR_SRC_CTRY sy-vline 
WA_MRMRSEG_TM_STR-TOR_DEST_CTRY sy-vline 
WA_MRMRSEG_TM_STR-DUMMY sy-vline 
WA_MRMRSEG_TM_STR-KZ sy-vline      INTO ld_text SEPARATED BY SPACE.

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