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

Get Example source ABAP code based on a different SAP table
  Get ABAP code

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_TO_READ_MAT
*  INTO TABLE @DATA(IT_/SCWM/S_TO_READ_MAT2).
*--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_TO_READ_MAT INDEX 1 INTO DATA(WA_/SCWM/S_TO_READ_MAT2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_TO_READ_MAT>-LGNUM = 1.
</SCWM/S_TO_READ_MAT>-MATID = 1.
</SCWM/S_TO_READ_MAT>-BATCHID = 1.
</SCWM/S_TO_READ_MAT>-CAT = 1.
</SCWM/S_TO_READ_MAT>-STOCK_DOCCAT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_TO_READ_MAT-STOCK_DOCNO, sy-vline,
  WA_/SCWM/S_TO_READ_MAT-STOCK_ITMNO, sy-vline,
  WA_/SCWM/S_TO_READ_MAT-DOCCAT, sy-vline,
  WA_/SCWM/S_TO_READ_MAT-STOCK_USAGE, sy-vline,
  WA_/SCWM/S_TO_READ_MAT-OWNER, sy-vline,
  WA_/SCWM/S_TO_READ_MAT-OWNER_ROLE, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_TO_READ_MAT 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_TO_READ_MAT 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_TO_READ_MAT INTO WA_/SCWM/S_TO_READ_MAT.


*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 MDLPD, internal->external for field MATID
CALL FUNCTION 'CONVERSION_EXIT_MDLPD_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_TO_READ_MAT-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_TO_READ_MAT-MATID.
WRITE:/ 'New Value:', ld_input.

*Conversion exit BPMAP, internal->external for field OWNER
CALL FUNCTION 'CONVERSION_EXIT_BPMAP_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_TO_READ_MAT-OWNER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_TO_READ_MAT-OWNER.
WRITE:/ 'New Value:', ld_input.

*Conversion exit ALPHA, internal->external for field ENTITLED
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_TO_READ_MAT-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_TO_READ_MAT-ENTITLED.
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_TO_READ_MAT_STR, 
LGNUM TYPE STRING,
MATID TYPE STRING,
BATCHID TYPE STRING,
CAT TYPE STRING,
STOCK_DOCCAT TYPE STRING,
STOCK_DOCNO TYPE STRING,
STOCK_ITMNO TYPE STRING,
DOCCAT TYPE STRING,
STOCK_USAGE TYPE STRING,
OWNER TYPE STRING,
OWNER_ROLE TYPE STRING,
ENTITLED TYPE STRING,
ENTITLED_ROLE TYPE STRING,
STOCK_CNT TYPE STRING,
O_READ TYPE STRING,
L_READ TYPE STRING,
C_READ TYPE STRING,
E_READ TYPE STRING,
H_READ TYPE STRING,
OS_READ TYPE STRING,
LS_READ TYPE STRING,
CS_READ TYPE STRING,
HS_READ TYPE STRING,
T_TANUM TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_TO_READ_MAT_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_TO_READ_MAT_STR-LGNUM sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-MATID sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-BATCHID sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-CAT sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-STOCK_DOCCAT sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-STOCK_DOCNO sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-STOCK_ITMNO sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-DOCCAT sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-STOCK_USAGE sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-OWNER sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-OWNER_ROLE sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-ENTITLED sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-ENTITLED_ROLE sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-STOCK_CNT sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-O_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-L_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-C_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-E_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-H_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-OS_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-LS_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-CS_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-HS_READ sy-vline 
WA_/SCWM/S_TO_READ_MAT_STR-T_TANUM sy-vline      INTO ld_text SEPARATED BY SPACE.

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