ABAP Select data from SAP table /SAPWF/BAPI_MLGNX___________00 into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP /SAPWF/BAPI_MLGNX___________00 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 /SAPWF/BAPI_MLGNX___________00. 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 /SAPWF/BAPI_MLGNX___________00 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_/SAPWF/BAPI_MLGNX___________00 TYPE STANDARD TABLE OF /SAPWF/BAPI_MLGNX___________00,
      WA_/SAPWF/BAPI_MLGNX___________00 TYPE /SAPWF/BAPI_MLGNX___________00,
      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: </SAPWF/BAPI_MLGNX___________00> TYPE /SAPWF/BAPI_MLGNX___________00.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_/SAPWF/BAPI_MLGNX___________00.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM /SAPWF/BAPI_MLGNX___________00
  INTO TABLE IT_/SAPWF/BAPI_MLGNX___________00.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM /SAPWF/BAPI_MLGNX___________00
*  INTO TABLE @DATA(IT_/SAPWF/BAPI_MLGNX___________002).
*--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_/SAPWF/BAPI_MLGNX___________00 INDEX 1 INTO DATA(WA_/SAPWF/BAPI_MLGNX___________002).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_/SAPWF/BAPI_MLGNX___________00 ASSIGNING </SAPWF/BAPI_MLGNX___________00>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
</SAPWF/BAPI_MLGNX___________00>-WHSE_NO = 1.
</SAPWF/BAPI_MLGNX___________00>-DEL_FLAG = 1.
</SAPWF/BAPI_MLGNX___________00>-STGESECTOR = 1.
</SAPWF/BAPI_MLGNX___________00>-PLACEMENT = 1.
</SAPWF/BAPI_MLGNX___________00>-WITHDRAWAL = 1.

ENDLOOP.

LOOP AT IT_/SAPWF/BAPI_MLGNX___________00 INTO WA_/SAPWF/BAPI_MLGNX___________00.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_/SAPWF/BAPI_MLGNX___________00-L_EQUIP_1, sy-vline,
  WA_/SAPWF/BAPI_MLGNX___________00-L_EQUIP_2, sy-vline,
  WA_/SAPWF/BAPI_MLGNX___________00-L_EQUIP_3, sy-vline,
  WA_/SAPWF/BAPI_MLGNX___________00-LEQ_UNIT_1, sy-vline,
  WA_/SAPWF/BAPI_MLGNX___________00-LEQ_UNIT_1_ISO, sy-vline,
  WA_/SAPWF/BAPI_MLGNX___________00-LEQ_UNIT_2, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_/SAPWF/BAPI_MLGNX___________00 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_/SAPWF/BAPI_MLGNX___________00 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_/SAPWF/BAPI_MLGNX___________00 INTO WA_/SAPWF/BAPI_MLGNX___________00.


*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.
ENDFORM. 

*&---------------------------------------------------------------------*
*& Form process_as_string_field_values
*&---------------------------------------------------------------------*
FORM process_as_string_field_values CHANGING p_EKKO LIKE wa_EKKO.

TYPES: BEGIN OF T_/SAPWF/BAPI_MLGNX___________00_STR, 
WHSE_NO TYPE STRING,
DEL_FLAG TYPE STRING,
STGESECTOR TYPE STRING,
PLACEMENT TYPE STRING,
WITHDRAWAL TYPE STRING,
L_EQUIP_1 TYPE STRING,
L_EQUIP_2 TYPE STRING,
L_EQUIP_3 TYPE STRING,
LEQ_UNIT_1 TYPE STRING,
LEQ_UNIT_1_ISO TYPE STRING,
LEQ_UNIT_2 TYPE STRING,
LEQ_UNIT_2_ISO TYPE STRING,
LEQ_UNIT_3 TYPE STRING,
LEQ_UNIT_3_ISO TYPE STRING,
UNITTYPE_1 TYPE STRING,
UNITTYPE_2 TYPE STRING,
UNITTYPE_3 TYPE STRING,
WM_UNIT TYPE STRING,
WM_UNIT_ISO TYPE STRING,
ADD_TO_STK TYPE STRING,
BLOCK_STGE TYPE STRING,
MSG_TO_IM TYPE STRING,
SPEC_MVMT TYPE STRING,
CAPY_USAGE TYPE STRING,
PROCURE_UN TYPE STRING,
PROCURE_UN_ISO TYPE STRING,
STGE_TYPE TYPE STRING,
REF_UNIT TYPE STRING,
2STEP_PICK TYPE STRING,END OF T_EKKO_STR.
DATA: WA_/SAPWF/BAPI_MLGNX___________00_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_/SAPWF/BAPI_MLGNX___________00_STR-WHSE_NO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-DEL_FLAG sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-STGESECTOR sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-PLACEMENT sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-WITHDRAWAL sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-L_EQUIP_1 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-L_EQUIP_2 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-L_EQUIP_3 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_1 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_1_ISO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_2 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_2_ISO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_3 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-LEQ_UNIT_3_ISO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-UNITTYPE_1 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-UNITTYPE_2 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-UNITTYPE_3 sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-WM_UNIT sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-WM_UNIT_ISO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-ADD_TO_STK sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-BLOCK_STGE sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-MSG_TO_IM sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-SPEC_MVMT sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-CAPY_USAGE sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-PROCURE_UN sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-PROCURE_UN_ISO sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-STGE_TYPE sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-REF_UNIT sy-vline 
WA_/SAPWF/BAPI_MLGNX___________00_STR-2STEP_PICK sy-vline      INTO ld_text SEPARATED BY SPACE.

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