ABAP Select data from SAP table /SCWM/S_LM_LDP_GW_WORKLOAD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SCWM/S_LM_LDP_GW_WORKLOAD 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 /SCWM/S_LM_LDP_GW_WORKLOAD. 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 /SCWM/S_LM_LDP_GW_WORKLOAD 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_/SCWM/S_LM_LDP_GW_WORKLOAD TYPE STANDARD TABLE OF /SCWM/S_LM_LDP_GW_WORKLOAD,
      WA_/SCWM/S_LM_LDP_GW_WORKLOAD TYPE /SCWM/S_LM_LDP_GW_WORKLOAD,
      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: </SCWM/S_LM_LDP_GW_WORKLOAD> TYPE /SCWM/S_LM_LDP_GW_WORKLOAD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/S_LM_LDP_GW_WORKLOAD
  INTO TABLE IT_/SCWM/S_LM_LDP_GW_WORKLOAD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_LM_LDP_GW_WORKLOAD
*  INTO TABLE @DATA(IT_/SCWM/S_LM_LDP_GW_WORKLOAD2).
*--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_/SCWM/S_LM_LDP_GW_WORKLOAD INDEX 1 INTO DATA(WA_/SCWM/S_LM_LDP_GW_WORKLOAD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/S_LM_LDP_GW_WORKLOAD ASSIGNING </SCWM/S_LM_LDP_GW_WORKLOAD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_LM_LDP_GW_WORKLOAD>-WAREHOUSENUMBER = 1.
</SCWM/S_LM_LDP_GW_WORKLOAD>-TIMESLOT = 1.
</SCWM/S_LM_LDP_GW_WORKLOAD>-TIMESCALE = 1.
</SCWM/S_LM_LDP_GW_WORKLOAD>-VIEWID = 1.
</SCWM/S_LM_LDP_GW_WORKLOAD>-ACTIVITYAREA = 1.

ENDLOOP.

LOOP AT IT_/SCWM/S_LM_LDP_GW_WORKLOAD INTO WA_/SCWM/S_LM_LDP_GW_WORKLOAD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_LM_LDP_GW_WORKLOAD-PROCESSSTEP, sy-vline,
  WA_/SCWM/S_LM_LDP_GW_WORKLOAD-OBJECTTYPE, sy-vline,
  WA_/SCWM/S_LM_LDP_GW_WORKLOAD-INTIME, sy-vline,
  WA_/SCWM/S_LM_LDP_GW_WORKLOAD-DURATIONEARLY, sy-vline,
  WA_/SCWM/S_LM_LDP_GW_WORKLOAD-DURATIONLATE, sy-vline,
  WA_/SCWM/S_LM_LDP_GW_WORKLOAD-DURATIONUNIT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_LM_LDP_GW_WORKLOAD 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_/SCWM/S_LM_LDP_GW_WORKLOAD 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_/SCWM/S_LM_LDP_GW_WORKLOAD INTO WA_/SCWM/S_LM_LDP_GW_WORKLOAD.


*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 DURATIONUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_LDP_GW_WORKLOAD-DURATIONUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_LDP_GW_WORKLOAD-DURATIONUNIT.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field VOLUMEUNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_LDP_GW_WORKLOAD-VOLUMEUNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_LDP_GW_WORKLOAD-VOLUMEUNIT.
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_/SCWM/S_LM_LDP_GW_WORKLOAD_STR, 
WAREHOUSENUMBER TYPE STRING,
TIMESLOT TYPE STRING,
TIMESCALE TYPE STRING,
VIEWID TYPE STRING,
ACTIVITYAREA TYPE STRING,
PROCESSSTEP TYPE STRING,
OBJECTTYPE TYPE STRING,
INTIME TYPE STRING,
DURATIONEARLY TYPE STRING,
DURATIONLATE TYPE STRING,
DURATIONUNIT TYPE STRING,
WEIGHTEARLY TYPE STRING,
WEIGHTLATE TYPE STRING,
WEIGHTUNIT TYPE STRING,
VOLUMEEARLY TYPE STRING,
VOLUMELATE TYPE STRING,
VOLUMEUNIT TYPE STRING,
FTEEARLY TYPE STRING,
FTELATE TYPE STRING,
CAPACITYCONSUMPTIONEARLY TYPE STRING,
CAPACITYCONSUMPTIONLATE TYPE STRING,
NUMBEROFITEMSEARLY TYPE STRING,
NUMBEROFITEMSLATE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_LM_LDP_GW_WORKLOAD_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_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-WAREHOUSENUMBER sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-TIMESLOT sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-TIMESCALE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-VIEWID sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-ACTIVITYAREA sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-PROCESSSTEP sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-OBJECTTYPE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-INTIME sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-DURATIONEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-DURATIONLATE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-DURATIONUNIT sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-WEIGHTEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-WEIGHTLATE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-WEIGHTUNIT sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-VOLUMEEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-VOLUMELATE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-VOLUMEUNIT sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-FTEEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-FTELATE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-CAPACITYCONSUMPTIONEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-CAPACITYCONSUMPTIONLATE sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-NUMBEROFITEMSEARLY sy-vline 
WA_/SCWM/S_LM_LDP_GW_WORKLOAD_STR-NUMBEROFITEMSLATE sy-vline      INTO ld_text SEPARATED BY SPACE.

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