ABAP Select data from SAP table REIS_MS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REIS_MS
*  INTO TABLE @DATA(IT_REIS_MS2).
*--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_REIS_MS INDEX 1 INTO DATA(WA_REIS_MS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REIS_MS>-MEASVALUE01 = 1.
<REIS_MS>-MEASUNIT01 = 1.
<REIS_MS>-MEASVALUE02 = 1.
<REIS_MS>-MEASUNIT02 = 1.
<REIS_MS>-MEASVALUE03 = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REIS_MS-MEASUNIT03, sy-vline,
  WA_REIS_MS-MEASVALUE04, sy-vline,
  WA_REIS_MS-MEASUNIT04, sy-vline,
  WA_REIS_MS-MEASVALUE05, sy-vline,
  WA_REIS_MS-MEASUNIT05, sy-vline,
  WA_REIS_MS-MEASVALUE06, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REIS_MS 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_REIS_MS 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_REIS_MS INTO WA_REIS_MS.


*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 MEASUNIT01
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT01
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT01.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT02
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT02
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT02.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT03
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT03
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT03.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT04
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT04
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT04.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT05
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT05
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT05.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT06
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT06
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT06.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT07
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT07
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT07.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT08
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT08
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT08.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT09
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT09
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT09.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field MEASUNIT10
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_REIS_MS-MEASUNIT10
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REIS_MS-MEASUNIT10.
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_REIS_MS_STR, 
MEASVALUE01 TYPE STRING,
MEASUNIT01 TYPE STRING,
MEASVALUE02 TYPE STRING,
MEASUNIT02 TYPE STRING,
MEASVALUE03 TYPE STRING,
MEASUNIT03 TYPE STRING,
MEASVALUE04 TYPE STRING,
MEASUNIT04 TYPE STRING,
MEASVALUE05 TYPE STRING,
MEASUNIT05 TYPE STRING,
MEASVALUE06 TYPE STRING,
MEASUNIT06 TYPE STRING,
MEASVALUE07 TYPE STRING,
MEASUNIT07 TYPE STRING,
MEASVALUE08 TYPE STRING,
MEASUNIT08 TYPE STRING,
MEASVALUE09 TYPE STRING,
MEASUNIT09 TYPE STRING,
MEASVALUE10 TYPE STRING,
MEASUNIT10 TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REIS_MS_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_REIS_MS_STR-MEASVALUE01 sy-vline 
WA_REIS_MS_STR-MEASUNIT01 sy-vline 
WA_REIS_MS_STR-MEASVALUE02 sy-vline 
WA_REIS_MS_STR-MEASUNIT02 sy-vline 
WA_REIS_MS_STR-MEASVALUE03 sy-vline 
WA_REIS_MS_STR-MEASUNIT03 sy-vline 
WA_REIS_MS_STR-MEASVALUE04 sy-vline 
WA_REIS_MS_STR-MEASUNIT04 sy-vline 
WA_REIS_MS_STR-MEASVALUE05 sy-vline 
WA_REIS_MS_STR-MEASUNIT05 sy-vline 
WA_REIS_MS_STR-MEASVALUE06 sy-vline 
WA_REIS_MS_STR-MEASUNIT06 sy-vline 
WA_REIS_MS_STR-MEASVALUE07 sy-vline 
WA_REIS_MS_STR-MEASUNIT07 sy-vline 
WA_REIS_MS_STR-MEASVALUE08 sy-vline 
WA_REIS_MS_STR-MEASUNIT08 sy-vline 
WA_REIS_MS_STR-MEASVALUE09 sy-vline 
WA_REIS_MS_STR-MEASUNIT09 sy-vline 
WA_REIS_MS_STR-MEASVALUE10 sy-vline 
WA_REIS_MS_STR-MEASUNIT10 sy-vline      INTO ld_text SEPARATED BY SPACE.

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