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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_LM_ELS_CTX_INV_I
*  INTO TABLE @DATA(IT_/SCWM/S_LM_ELS_CTX_INV_I2).
*--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_INV_I INDEX 1 INTO DATA(WA_/SCWM/S_LM_ELS_CTX_INV_I2).


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

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

ENDLOOP.

LOOP AT IT_/SCWM/S_LM_ELS_CTX_INV_I INTO WA_/SCWM/S_LM_ELS_CTX_INV_I.
*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_INV_I-UNIT_T, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_INV_I-WEIGHT, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_INV_I-UNIT_W, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_INV_I-VOLUM, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_INV_I-UNIT_V, sy-vline,
  WA_/SCWM/S_LM_ELS_CTX_INV_I-CAPA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_LM_ELS_CTX_INV_I 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_INV_I 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_INV_I INTO WA_/SCWM/S_LM_ELS_CTX_INV_I.


*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 UNIT_T
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_INV_I-UNIT_T
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-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_INV_I-UNIT_W
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-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_INV_I-UNIT_V
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-UNIT_V.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ALPHA, internal->external for field ENTITLED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_INV_I-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-ENTITLED.
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_INV_I-UNIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-UNIT.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field WHO
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_INV_I-WHO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-WHO.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field TANUM
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_INV_I-TANUM
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-TANUM.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPH0, internal->external for field TAPOS
CALL FUNCTION 'CONVERSION_EXIT_ALPH0_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_LM_ELS_CTX_INV_I-TAPOS
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_LM_ELS_CTX_INV_I-TAPOS.
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_INV_I_STR, 
LGNUM TYPE STRING,
PROCS TYPE STRING,
AAREA TYPE STRING,
LA_CODE TYPE STRING,
PLDURA TYPE STRING,
UNIT_T TYPE STRING,
WEIGHT TYPE STRING,
UNIT_W TYPE STRING,
VOLUM TYPE STRING,
UNIT_V TYPE STRING,
CAPA TYPE STRING,
DISTANCE TYPE STRING,
UNIT_D TYPE STRING,
ENTITLED TYPE STRING,
DISTANCE_Z TYPE STRING,
DISTANCE_TIME TYPE STRING,
QUAN TYPE STRING,
UNIT TYPE STRING,
WHO TYPE STRING,
TANUM TYPE STRING,
TAPOS TYPE STRING,
LGTYP TYPE STRING,
LGBER TYPE STRING,
LGPLA TYPE STRING,
LPTYP TYPE STRING,
BIN_AT TYPE STRING,
WLCAT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_LM_ELS_CTX_INV_I_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_INV_I_STR-LGNUM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-PROCS sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-AAREA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-LA_CODE sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-PLDURA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-UNIT_T sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-WEIGHT sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-UNIT_W sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-VOLUM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-UNIT_V sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-CAPA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-DISTANCE sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-UNIT_D sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-ENTITLED sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-DISTANCE_Z sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-DISTANCE_TIME sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-QUAN sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-UNIT sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-WHO sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-TANUM sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-TAPOS sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-LGTYP sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-LGBER sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-LGPLA sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-LPTYP sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-BIN_AT sy-vline 
WA_/SCWM/S_LM_ELS_CTX_INV_I_STR-WLCAT sy-vline      INTO ld_text SEPARATED BY SPACE.

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