ABAP Select data from SAP table /SCWM/S_LM_ELS_CTX_HU 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_ELS_CTX_HU 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_ELS_CTX_HU. 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_ELS_CTX_HU 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_ELS_CTX_HU TYPE STANDARD TABLE OF /SCWM/S_LM_ELS_CTX_HU,
      WA_/SCWM/S_LM_ELS_CTX_HU TYPE /SCWM/S_LM_ELS_CTX_HU,
      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_ELS_CTX_HU> TYPE /SCWM/S_LM_ELS_CTX_HU.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_LM_ELS_CTX_HU
*  INTO TABLE @DATA(IT_/SCWM/S_LM_ELS_CTX_HU2).
*--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_ELS_CTX_HU INDEX 1 INTO DATA(WA_/SCWM/S_LM_ELS_CTX_HU2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_LM_ELS_CTX_HU>-LGNUM = 1.
</SCWM/S_LM_ELS_CTX_HU>-PROCS = 1.
</SCWM/S_LM_ELS_CTX_HU>-ENTITLED = 1.
</SCWM/S_LM_ELS_CTX_HU>-AAREA = 1.
</SCWM/S_LM_ELS_CTX_HU>-STATUS = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_LM_ELS_CTX_HU-PLANDURA, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_HU-UNIT_T, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_HU-LA_CODE, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_HU-WEIGHT, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_HU-UNIT_W, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_HU-VOLUM, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_LM_ELS_CTX_HU 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_ELS_CTX_HU 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_ELS_CTX_HU INTO WA_/SCWM/S_LM_ELS_CTX_HU.


*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 ENTITLED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_HU-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_HU-ENTITLED.
WRITE:/ 'New Value:', ld_input.

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

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

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

*Conversion exit CUNIT, internal->external for field UNIT
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_HU-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_HU-UNIT.
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_ELS_CTX_HU_STR, 
LGNUM TYPE STRING,
PROCS TYPE STRING,
ENTITLED TYPE STRING,
AAREA TYPE STRING,
STATUS TYPE STRING,
PLANDURA TYPE STRING,
UNIT_T TYPE STRING,
LA_CODE TYPE STRING,
WEIGHT TYPE STRING,
UNIT_W TYPE STRING,
VOLUM TYPE STRING,
UNIT_V TYPE STRING,
QUAN TYPE STRING,
UNIT TYPE STRING,
NUM_WL TYPE STRING,
DURA_SUM_HU_ITEM TYPE STRING,
PRCES TYPE STRING,
PMTYP TYPE STRING,
PACKGR TYPE STRING,
LGTYP TYPE STRING,
LGBER TYPE STRING,
RSRC TYPE STRING,
HUTYPGRP TYPE STRING,
LETYP TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_LM_ELS_CTX_HU_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_ELS_CTX_HU_STR-LGNUM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-PROCS sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-ENTITLED sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-AAREA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-STATUS sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-PLANDURA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-UNIT_T sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-LA_CODE sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-WEIGHT sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-UNIT_W sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-VOLUM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-UNIT_V sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-QUAN sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-UNIT sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-NUM_WL sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-DURA_SUM_HU_ITEM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-PRCES sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-PMTYP sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-PACKGR sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-LGTYP sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-LGBER sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-RSRC sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-HUTYPGRP sy-vline 
WA_/SCWM/S_LM_ELS_CTX_HU_STR-LETYP sy-vline      INTO ld_text SEPARATED BY SPACE.

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