ABAP Select data from SAP table DPWTY_S_MEASUREMENT into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM DPWTY_S_MEASUREMENT
*  INTO TABLE @DATA(IT_DPWTY_S_MEASUREMENT2).
*--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_DPWTY_S_MEASUREMENT INDEX 1 INTO DATA(WA_DPWTY_S_MEASUREMENT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<DPWTY_S_MEASUREMENT>-MANDT = 1.
<DPWTY_S_MEASUREMENT>-PNGUID = 1.
<DPWTY_S_MEASUREMENT>-V_MDOCM = 1.
<DPWTY_S_MEASUREMENT>-VERSN = 1.
<DPWTY_S_MEASUREMENT>-V_DISTANCE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_DPWTY_S_MEASUREMENT-V_D_UNIT, sy-vline,
  WA_DPWTY_S_MEASUREMENT-H_MDOCM, sy-vline,
  WA_DPWTY_S_MEASUREMENT-I_MDOCM, sy-vline,
  WA_DPWTY_S_MEASUREMENT-V_MEASURE_POINT, sy-vline,
  WA_DPWTY_S_MEASUREMENT-LF_FLAG, sy-vline,
  WA_DPWTY_S_MEASUREMENT-LAST_MEASUREMENT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_DPWTY_S_MEASUREMENT 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_DPWTY_S_MEASUREMENT 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_DPWTY_S_MEASUREMENT INTO WA_DPWTY_S_MEASUREMENT.


*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 LUNIT, internal->external for field LAST_MEASUREM_UNIT
CALL FUNCTION 'CONVERSION_EXIT_LUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DPWTY_S_MEASUREMENT-LAST_MEASUREM_UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DPWTY_S_MEASUREMENT-LAST_MEASUREM_UNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field MSEHI
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_DPWTY_S_MEASUREMENT-MSEHI
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_DPWTY_S_MEASUREMENT-MSEHI.
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_DPWTY_S_MEASUREMENT_STR, 
MANDT TYPE STRING,
PNGUID TYPE STRING,
V_MDOCM TYPE STRING,
VERSN TYPE STRING,
V_DISTANCE TYPE STRING,
V_D_UNIT TYPE STRING,
H_MDOCM TYPE STRING,
I_MDOCM TYPE STRING,
V_MEASURE_POINT TYPE STRING,
LF_FLAG TYPE STRING,
LAST_MEASUREMENT TYPE STRING,
LAST_MEASUREM_UNIT TYPE STRING,
V_MDOCM_OLD TYPE STRING,
POINT TYPE STRING,
PSORT TYPE STRING,
PTTXT TYPE STRING,
DIST_FLAG TYPE STRING,
TIME_FLAG TYPE STRING,
RECNT TYPE STRING,
DECIM TYPE STRING,
MSEHI TYPE STRING,
MSEH6 TYPE STRING,
LCNTC TYPE STRING,
DATE TYPE STRING,
TIME TYPE STRING,
UNITC TYPE STRING,
EXPON TYPE STRING,
SELECT_DATE TYPE STRING,
SELECT_TIME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_DPWTY_S_MEASUREMENT_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_DPWTY_S_MEASUREMENT_STR-MANDT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-PNGUID sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-V_MDOCM sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-VERSN sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-V_DISTANCE sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-V_D_UNIT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-H_MDOCM sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-I_MDOCM sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-V_MEASURE_POINT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-LF_FLAG sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-LAST_MEASUREMENT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-LAST_MEASUREM_UNIT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-V_MDOCM_OLD sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-POINT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-PSORT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-PTTXT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-DIST_FLAG sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-TIME_FLAG sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-RECNT sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-DECIM sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-MSEHI sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-MSEH6 sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-LCNTC sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-DATE sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-TIME sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-UNITC sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-EXPON sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-SELECT_DATE sy-vline 
WA_DPWTY_S_MEASUREMENT_STR-SELECT_TIME sy-vline      INTO ld_text SEPARATED BY SPACE.

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