ABAP Select data from SAP table /SCWM/S_MATERIAL_LGNUM_MAINT_2 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_MAINT_2 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_MAINT_2. 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_MAINT_2 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_MAINT_2 TYPE STANDARD TABLE OF /SCWM/S_MATERIAL_LGNUM_MAINT_2,
      WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2 TYPE /SCWM/S_MATERIAL_LGNUM_MAINT_2,
      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_MAINT_2> TYPE /SCWM/S_MATERIAL_LGNUM_MAINT_2.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SCWM/S_MATERIAL_LGNUM_MAINT_2.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SCWM/S_MATERIAL_LGNUM_MAINT_2
  INTO TABLE IT_/SCWM/S_MATERIAL_LGNUM_MAINT_2.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SCWM/S_MATERIAL_LGNUM_MAINT_2
*  INTO TABLE @DATA(IT_/SCWM/S_MATERIAL_LGNUM_MAINT_22).
*--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_MAINT_2 INDEX 1 INTO DATA(WA_/SCWM/S_MATERIAL_LGNUM_MAINT_22).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SCWM/S_MATERIAL_LGNUM_MAINT_2 ASSIGNING </SCWM/S_MATERIAL_LGNUM_MAINT_2>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SCWM/S_MATERIAL_LGNUM_MAINT_2>-MATID = 1.
</SCWM/S_MATERIAL_LGNUM_MAINT_2>-ENTITLED = 1.
</SCWM/S_MATERIAL_LGNUM_MAINT_2>-ENITLED_ID = 1.
</SCWM/S_MATERIAL_LGNUM_MAINT_2>-PROCPRFL = 1.
</SCWM/S_MATERIAL_LGNUM_MAINT_2>-PTDETIND = 1.

ENDLOOP.

LOOP AT IT_/SCWM/S_MATERIAL_LGNUM_MAINT_2 INTO WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2.
*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_MAINT_2-WRKLDGR, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-RATIODIM, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-DRDETGR, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-VASVCP, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-SLRQ_MIN, sy-vline,
  WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-PUT_STRA, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2 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_MAINT_2 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_MAINT_2 INTO WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2.


*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_MAINT_2-MATID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-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_MAINT_2-ENTITLED
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-ENTITLED.
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_MAINT_2-SLRQ_MIN
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-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_MAINT_2-PUOM_WH
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2-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_MAINT_2_STR, 
MATID TYPE STRING,
ENTITLED TYPE STRING,
ENITLED_ID 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_MAINT_2_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_MAINT_2_STR-MATID sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-ENTITLED sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-ENITLED_ID sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PROCPRFL sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PTDETIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-WRKLDGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-RATIODIM sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-DRDETGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-VASVCP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-SLRQ_MIN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PUT_STRA sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PUT_STRA_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PUT_STRA_PLAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-LGBKZ sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-LPTYP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-BLOCK sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-REM_STRA sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-REM_STRA_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-REM_STRA_PLAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-STCKDETGR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-L2SKR sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-DEMQTY sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-DEMQTY_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-NOSOI sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-NOSOI_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-RSQTY sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-RSQTY_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-DEMTYP sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-CONCSTAT sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-LASTSLOT sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-WGHTIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-WGHTIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-VOLIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-VOLIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-LGTHIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-LGTHIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-WDTHIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-WDTHIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-HGHTIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-HGHTIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-CCIND sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-CCIND_FIX sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-DOCBATCH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-BACKFLUSH_PROD sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-KIT_FIXED_QUAN sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-MEDI_APROF_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-QUANCLA_MERCH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PUOM_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-PRFRQ sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-SSQSS sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-BATCH_REQ_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-QGRP_WH sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_STR-HARSERIAL sy-vline 
WA_/SCWM/S_MATERIAL_LGNUM_MAINT_2_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.