ABAP Select data from SAP table REXCSCCH_MEASURE_POINT_L into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM REXCSCCH_MEASURE_POINT_L
*  INTO TABLE @DATA(IT_REXCSCCH_MEASURE_POINT_L2).
*--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_REXCSCCH_MEASURE_POINT_L INDEX 1 INTO DATA(WA_REXCSCCH_MEASURE_POINT_L2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<REXCSCCH_MEASURE_POINT_L>-MANDT = 1.
<REXCSCCH_MEASURE_POINT_L>-MPNUMBER = 1.
<REXCSCCH_MEASURE_POINT_L>-OBJNR = 1.
<REXCSCCH_MEASURE_POINT_L>-EXTIDENT = 1.
<REXCSCCH_MEASURE_POINT_L>-CHARACTERISTIC = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_REXCSCCH_MEASURE_POINT_L-PSORT, sy-vline,
  WA_REXCSCCH_MEASURE_POINT_L-PTTXT, sy-vline,
  WA_REXCSCCH_MEASURE_POINT_L-XCHARACTERISTIC, sy-vline,
  WA_REXCSCCH_MEASURE_POINT_L-UNIT, sy-vline,
  WA_REXCSCCH_MEASURE_POINT_L-MPTYPE, sy-vline,
  WA_REXCSCCH_MEASURE_POINT_L-RO_IMKEY, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_REXCSCCH_MEASURE_POINT_L 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_REXCSCCH_MEASURE_POINT_L 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_REXCSCCH_MEASURE_POINT_L INTO WA_REXCSCCH_MEASURE_POINT_L.


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

*Conversion exit ATINN, internal->external for field CHARACTERISTIC
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_MEASURE_POINT_L-CHARACTERISTIC
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_MEASURE_POINT_L-CHARACTERISTIC.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit IMKEY, internal->external for field RO_IMKEY
CALL FUNCTION 'CONVERSION_EXIT_IMKEY_OUTPUT'
  EXPORTING
    input =                      WA_REXCSCCH_MEASURE_POINT_L-RO_IMKEY
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_REXCSCCH_MEASURE_POINT_L-RO_IMKEY.
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_REXCSCCH_MEASURE_POINT_L_STR, 
MANDT TYPE STRING,
MPNUMBER TYPE STRING,
OBJNR TYPE STRING,
EXTIDENT TYPE STRING,
CHARACTERISTIC TYPE STRING,
PSORT TYPE STRING,
PTTXT TYPE STRING,
XCHARACTERISTIC TYPE STRING,
UNIT TYPE STRING,
MPTYPE TYPE STRING,
RO_IMKEY TYPE STRING,
WARNING_HIERARCHY TYPE STRING,
ICON_DETAIL TYPE STRING,END OF T_EKKO_STR.
DATA: WA_REXCSCCH_MEASURE_POINT_L_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_REXCSCCH_MEASURE_POINT_L_STR-MANDT sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-MPNUMBER sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-OBJNR sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-EXTIDENT sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-CHARACTERISTIC sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-PSORT sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-PTTXT sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-XCHARACTERISTIC sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-UNIT sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-MPTYPE sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-RO_IMKEY sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-WARNING_HIERARCHY sy-vline 
WA_REXCSCCH_MEASURE_POINT_L_STR-ICON_DETAIL sy-vline      INTO ld_text SEPARATED BY SPACE.

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