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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_MATERIAL_LGNUM
*  INTO TABLE @DATA(IT_/SCWM/S_MATERIAL_LGNUM2).
*--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_MATERIAL_LGNUM INDEX 1 INTO DATA(WA_/SCWM/S_MATERIAL_LGNUM2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_MATERIAL_LGNUM>-MATID = 1.
</SCWM/S_MATERIAL_LGNUM>-LGNUM = 1.
</SCWM/S_MATERIAL_LGNUM>-ENTITLED = 1.
</SCWM/S_MATERIAL_LGNUM>-MEINS = 1.
</SCWM/S_MATERIAL_LGNUM>-PROCPRFL = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SCWM/S_MATERIAL_LGNUM-PTDETIND, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM-WRKLDGR, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM-RATIODIM, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM-DRDETGR, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM-VASVCP, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM-SLRQ_MIN, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_MATERIAL_LGNUM 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_MATERIAL_LGNUM 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_MATERIAL_LGNUM INTO WA_/SCWM/S_MATERIAL_LGNUM.


*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_MATERIAL_LGNUM-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM-MATID.
WRITE:/ 'New Value:', ld_input.

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

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

*Conversion exit TSTRG, internal->external for field SLRQ_MIN
CALL FUNCTION 'CONVERSION_EXIT_TSTRG_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MATERIAL_LGNUM-SLRQ_MIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM-SLRQ_MIN.
WRITE:/ 'New Value:', ld_input.

*Conversion exit CUNIT, internal->external for field PUOM_WH
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_/SCWM/S_MATERIAL_LGNUM-PUOM_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM-PUOM_WH.
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_MATERIAL_LGNUM_STR, 
MATID TYPE STRING,
LGNUM TYPE STRING,
ENTITLED TYPE STRING,
MEINS TYPE STRING,
PROCPRFL TYPE STRING,
PTDETIND TYPE STRING,
WRKLDGR TYPE STRING,
RATIODIM TYPE STRING,
DRDETGR TYPE STRING,
VASVCP TYPE STRING,
SLRQ_MIN TYPE STRING,
PUT_STRA TYPE STRING,
PUT_STRA_FIX TYPE STRING,
PUT_STRA_PLAN TYPE STRING,
LGBKZ TYPE STRING,
LPTYP TYPE STRING,
BLOCK TYPE STRING,
REM_STRA TYPE STRING,
REM_STRA_FIX TYPE STRING,
REM_STRA_PLAN TYPE STRING,
STCKDETGR TYPE STRING,
L2SKR TYPE STRING,
DEMQTY TYPE STRING,
DEMQTY_FIX TYPE STRING,
NOSOI TYPE STRING,
NOSOI_FIX TYPE STRING,
RSQTY TYPE STRING,
RSQTY_FIX TYPE STRING,
DEMTYP TYPE STRING,
CONCSTAT TYPE STRING,
LASTSLOT TYPE STRING,
WGHTIND TYPE STRING,
WGHTIND_FIX TYPE STRING,
VOLIND TYPE STRING,
VOLIND_FIX TYPE STRING,
LGTHIND TYPE STRING,
LGTHIND_FIX TYPE STRING,
WDTHIND TYPE STRING,
WDTHIND_FIX TYPE STRING,
HGHTIND TYPE STRING,
HGHTIND_FIX TYPE STRING,
CCIND TYPE STRING,
CCIND_FIX TYPE STRING,
DOCBATCH TYPE STRING,
BACKFLUSH_PROD TYPE STRING,
KIT_FIXED_QUAN TYPE STRING,
MEDI_APROF_WH TYPE STRING,
QUANCLA_MERCH TYPE STRING,
PUOM_WH TYPE STRING,
PRFRQ TYPE STRING,
SSQSS TYPE STRING,
BATCH_REQ_WH TYPE STRING,
QGRP_WH TYPE STRING,
HARSERIAL TYPE STRING,
DUMMY_WH_INCL_EEW_PS TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SCWM/S_MATERIAL_LGNUM_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_MATERIAL_LGNUM_STR-MATID sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LGNUM sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-ENTITLED sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-MEINS sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PROCPRFL sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PTDETIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-WRKLDGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-RATIODIM sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DRDETGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-VASVCP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-SLRQ_MIN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PUT_STRA sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PUT_STRA_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PUT_STRA_PLAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LGBKZ sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LPTYP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-BLOCK sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-REM_STRA sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-REM_STRA_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-REM_STRA_PLAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-STCKDETGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-L2SKR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DEMQTY sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DEMQTY_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-NOSOI sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-NOSOI_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-RSQTY sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-RSQTY_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DEMTYP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-CONCSTAT sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LASTSLOT sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-WGHTIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-WGHTIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-VOLIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-VOLIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LGTHIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-LGTHIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-WDTHIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-WDTHIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-HGHTIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-HGHTIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-CCIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-CCIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DOCBATCH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-BACKFLUSH_PROD sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-KIT_FIXED_QUAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-MEDI_APROF_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-QUANCLA_MERCH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PUOM_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-PRFRQ sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-SSQSS sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-BATCH_REQ_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-QGRP_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-HARSERIAL sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_STR-DUMMY_WH_INCL_EEW_PS sy-vline      INTO ld_text SEPARATED BY SPACE.

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