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

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/SJIT_COMPONENT_DISPLAY
*  INTO TABLE @DATA(IT_/SCWM/SJIT_COMPONENT_DISPLAY2).
*--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/SJIT_COMPONENT_DISPLAY INDEX 1 INTO DATA(WA_/SCWM/SJIT_COMPONENT_DISPLAY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/SJIT_COMPONENT_DISPLAY>-CALL_NUM = 1.
</SCWM/SJIT_COMPONENT_DISPLAY>-COMP_MAT_NUM = 1.
</SCWM/SJIT_COMPONENT_DISPLAY>-DOCNO = 1.
</SCWM/SJIT_COMPONENT_DISPLAY>-ITEMNO = 1.
</SCWM/SJIT_COMPONENT_DISPLAY>-ITEMTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/SJIT_COMPONENT_DISPLAY-CRETST, sy-vline,
  WA_/SCWM/SJIT_COMPONENT_DISPLAY-CREUSR, sy-vline,
  WA_/SCWM/SJIT_COMPONENT_DISPLAY-CHGTST, sy-vline,
  WA_/SCWM/SJIT_COMPONENT_DISPLAY-CHGUSR, sy-vline,
  WA_/SCWM/SJIT_COMPONENT_DISPLAY-PRODUCTNO, sy-vline,
  WA_/SCWM/SJIT_COMPONENT_DISPLAY-BATCHNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/SJIT_COMPONENT_DISPLAY 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/SJIT_COMPONENT_DISPLAY 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/SJIT_COMPONENT_DISPLAY INTO WA_/SCWM/SJIT_COMPONENT_DISPLAY.


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

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

*Conversion exit TSTPS, internal->external for field CRETST
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/SJIT_COMPONENT_DISPLAY-CRETST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/SJIT_COMPONENT_DISPLAY-CRETST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit TSTPS, internal->external for field CHGTST
CALL FUNCTION 'CONVERSION_EXIT_TSTPS_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/SJIT_COMPONENT_DISPLAY-CHGTST
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/SJIT_COMPONENT_DISPLAY-CHGTST.
WRITE:/ 'New Value:', ld_input.

*Conversion exit MATN1, internal->external for field PRODUCTNO
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/SJIT_COMPONENT_DISPLAY-PRODUCTNO
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/SJIT_COMPONENT_DISPLAY-PRODUCTNO.
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/SJIT_COMPONENT_DISPLAY_STR, 
CALL_NUM TYPE STRING,
COMP_MAT_NUM TYPE STRING,
DOCNO TYPE STRING,
ITEMNO TYPE STRING,
ITEMTYPE TYPE STRING,
CRETST TYPE STRING,
CREUSR TYPE STRING,
CHGTST TYPE STRING,
CHGUSR TYPE STRING,
PRODUCTNO TYPE STRING,
BATCHNO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/SJIT_COMPONENT_DISPLAY_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/SJIT_COMPONENT_DISPLAY_STR-CALL_NUM sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-COMP_MAT_NUM sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-DOCNO sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-ITEMNO sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-ITEMTYPE sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-CRETST sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-CREUSR sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-CHGTST sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-CHGUSR sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-PRODUCTNO sy-vline 
WA_/SCWM/SJIT_COMPONENT_DISPLAY_STR-BATCHNO sy-vline      INTO ld_text SEPARATED BY SPACE.

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