ABAP Select data from SAP table RECN_MEASUREMENT_CN_X into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM RECN_MEASUREMENT_CN_X
*  INTO TABLE @DATA(IT_RECN_MEASUREMENT_CN_X2).
*--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_RECN_MEASUREMENT_CN_X INDEX 1 INTO DATA(WA_RECN_MEASUREMENT_CN_X2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<RECN_MEASUREMENT_CN_X>-MANDT = 1.
<RECN_MEASUREMENT_CN_X>-INTRENO = 1.
<RECN_MEASUREMENT_CN_X>-OBJNRTRG = 1.
<RECN_MEASUREMENT_CN_X>-MEAS = 1.
<RECN_MEASUREMENT_CN_X>-VALIDTO = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_RECN_MEASUREMENT_CN_X-VALIDFROM, sy-vline,
  WA_RECN_MEASUREMENT_CN_X-MEASVALUE, sy-vline,
  WA_RECN_MEASUREMENT_CN_X-MEASUNIT, sy-vline,
  WA_RECN_MEASUREMENT_CN_X-XMMEAS, sy-vline,
  WA_RECN_MEASUREMENT_CN_X-XSMEAS, sy-vline,
  WA_RECN_MEASUREMENT_CN_X-ISSUMMEAS, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_RECN_MEASUREMENT_CN_X 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_RECN_MEASUREMENT_CN_X 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_RECN_MEASUREMENT_CN_X INTO WA_RECN_MEASUREMENT_CN_X.


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

*Conversion exit REDAT, internal->external for field VALIDTO
CALL FUNCTION 'CONVERSION_EXIT_REDAT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_MEASUREMENT_CN_X-VALIDTO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_MEASUREMENT_CN_X-VALIDTO.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit CUNIT, internal->external for field MEASUNITSUM
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_RECN_MEASUREMENT_CN_X-MEASUNITSUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_RECN_MEASUREMENT_CN_X-MEASUNITSUM.
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_RECN_MEASUREMENT_CN_X_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
OBJNRTRG TYPE STRING,
MEAS TYPE STRING,
VALIDTO TYPE STRING,
VALIDFROM TYPE STRING,
MEASVALUE TYPE STRING,
MEASUNIT TYPE STRING,
XMMEAS TYPE STRING,
XSMEAS TYPE STRING,
ISSUMMEAS TYPE STRING,
MSEH6 TYPE STRING,
MEASVALUEOBJ TYPE STRING,
MEASUNITOBJ TYPE STRING,
MEASVALUESUM TYPE STRING,
MEASUNITSUM TYPE STRING,
EXISTSMEASOBJ TYPE STRING,
OBJDESCRIPTION TYPE STRING,
LWFAAVERAGE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_RECN_MEASUREMENT_CN_X_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_RECN_MEASUREMENT_CN_X_STR-MANDT sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-INTRENO sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-OBJNRTRG sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEAS sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-VALIDTO sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-VALIDFROM sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASVALUE sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASUNIT sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-XMMEAS sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-XSMEAS sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-ISSUMMEAS sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MSEH6 sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASVALUEOBJ sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASUNITOBJ sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASVALUESUM sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-MEASUNITSUM sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-EXISTSMEASOBJ sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-OBJDESCRIPTION sy-vline 
WA_RECN_MEASUREMENT_CN_X_STR-LWFAAVERAGE sy-vline      INTO ld_text SEPARATED BY SPACE.

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