ABAP Select data from SAP table ROIU_PR_MP_WC_MEAS into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ROIU_PR_MP_WC_MEAS
*  INTO TABLE @DATA(IT_ROIU_PR_MP_WC_MEAS2).
*--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_ROIU_PR_MP_WC_MEAS INDEX 1 INTO DATA(WA_ROIU_PR_MP_WC_MEAS2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ROIU_PR_MP_WC_MEAS>-MANDT = 1.
<ROIU_PR_MP_WC_MEAS>-MP_NO = 1.
<ROIU_PR_MP_WC_MEAS>-EFF_FROM_TS = 1.
<ROIU_PR_MP_WC_MEAS>-METYP = 1.
<ROIU_PR_MP_WC_MEAS>-DOCNR = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ROIU_PR_MP_WC_MEAS-DOCYR, sy-vline,
  WA_ROIU_PR_MP_WC_MEAS-OIU_CRUSER, sy-vline,
  WA_ROIU_PR_MP_WC_MEAS-OIU_TIMESTAMP, sy-vline,
  WA_ROIU_PR_MP_WC_MEAS-MTTXT, sy-vline,
  WA_ROIU_PR_MP_WC_MEAS-MP_DE, sy-vline,
  WA_ROIU_PR_MP_WC_MEAS-WL_NO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ROIU_PR_MP_WC_MEAS 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_ROIU_PR_MP_WC_MEAS 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_ROIU_PR_MP_WC_MEAS INTO WA_ROIU_PR_MP_WC_MEAS.


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

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

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

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

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

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

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

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

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

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

*Conversion exit ALPHA, internal->external for field REF_METYP
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ROIU_PR_MP_WC_MEAS-REF_METYP
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ROIU_PR_MP_WC_MEAS-REF_METYP.
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_ROIU_PR_MP_WC_MEAS_STR, 
MANDT TYPE STRING,
MP_NO TYPE STRING,
EFF_FROM_TS TYPE STRING,
METYP TYPE STRING,
DOCNR TYPE STRING,
DOCYR TYPE STRING,
OIU_CRUSER TYPE STRING,
OIU_TIMESTAMP TYPE STRING,
MTTXT TYPE STRING,
MP_DE TYPE STRING,
WL_NO TYPE STRING,
MECLS TYPE STRING,
WC_NO TYPE STRING,
WC_NM TYPE STRING,
EFF_FROM_DT TYPE STRING,
EFF_FROM_TM TYPE STRING,
REF_UOMGR_DESCR TYPE STRING,
UOMGR_DESCR TYPE STRING,
MP_TYPE_DE TYPE STRING,
REF_UOMGR TYPE STRING,
UOMGR TYPE STRING,
XXDBACTION TYPE STRING,
REF_MP_NO TYPE STRING,
REF_MP_DE TYPE STRING,
REF_WL_NO TYPE STRING,
REF_WC_NO TYPE STRING,
REF_WC_NM TYPE STRING,
REF_EFF_FROM_DT TYPE STRING,
REF_EFF_FROM_TM TYPE STRING,
REF_EFF_FROM_TS TYPE STRING,
REF_METYP TYPE STRING,
REF_MTTXT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ROIU_PR_MP_WC_MEAS_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_ROIU_PR_MP_WC_MEAS_STR-MANDT sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-MP_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-EFF_FROM_TS sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-METYP sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-DOCNR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-DOCYR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-OIU_CRUSER sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-OIU_TIMESTAMP sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-MTTXT sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-MP_DE sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-WL_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-MECLS sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-WC_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-WC_NM sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-EFF_FROM_DT sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-EFF_FROM_TM sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_UOMGR_DESCR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-UOMGR_DESCR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-MP_TYPE_DE sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_UOMGR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-UOMGR sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-XXDBACTION sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_MP_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_MP_DE sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_WL_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_WC_NO sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_WC_NM sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_EFF_FROM_DT sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_EFF_FROM_TM sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_EFF_FROM_TS sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_METYP sy-vline 
WA_ROIU_PR_MP_WC_MEAS_STR-REF_MTTXT sy-vline      INTO ld_text SEPARATED BY SPACE.

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