ABAP Select data from SAP table M_SHFLD into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP M_SHFLD 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 M_SHFLD. 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 M_SHFLD 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_M_SHFLD TYPE STANDARD TABLE OF M_SHFLD,
      WA_M_SHFLD TYPE M_SHFLD,
      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: <M_SHFLD> TYPE M_SHFLD.

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

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM M_SHFLD
  INTO TABLE IT_M_SHFLD.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM M_SHFLD
*  INTO TABLE @DATA(IT_M_SHFLD2).
*--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_M_SHFLD INDEX 1 INTO DATA(WA_M_SHFLD2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_M_SHFLD ASSIGNING <M_SHFLD>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<M_SHFLD>-MANDT = 1.
<M_SHFLD>-INTRENO = 1.
<M_SHFLD>-DGUELBIS = 1.
<M_SHFLD>-VERSION = 1.
<M_SHFLD>-BUKRS = 1.

ENDLOOP.

LOOP AT IT_M_SHFLD INTO WA_M_SHFLD.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_M_SHFLD-SWENR, sy-vline,
  WA_M_SHFLD-SGRNR, sy-vline,
  WA_M_SHFLD-SGENR, sy-vline,
  WA_M_SHFLD-FLID, sy-vline,
  WA_M_SHFLD-DGUELAB, sy-vline,
  WA_M_SHFLD-SGEBT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_M_SHFLD 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_M_SHFLD 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_M_SHFLD INTO WA_M_SHFLD.


*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 SWENR, internal->external for field SWENR
CALL FUNCTION 'CONVERSION_EXIT_SWENR_OUTPUT'
  EXPORTING
    input =                      WA_M_SHFLD-SWENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_SHFLD-SWENR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGRNR, internal->external for field SGRNR
CALL FUNCTION 'CONVERSION_EXIT_SGRNR_OUTPUT'
  EXPORTING
    input =                      WA_M_SHFLD-SGRNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_SHFLD-SGRNR.
WRITE:/ 'New Value:', ld_input.

*Conversion exit SGENR, internal->external for field SGENR
CALL FUNCTION 'CONVERSION_EXIT_SGENR_OUTPUT'
  EXPORTING
    input =                      WA_M_SHFLD-SGENR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_M_SHFLD-SGENR.
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_M_SHFLD_STR, 
MANDT TYPE STRING,
INTRENO TYPE STRING,
DGUELBIS TYPE STRING,
VERSION TYPE STRING,
BUKRS TYPE STRING,
SWENR TYPE STRING,
SGRNR TYPE STRING,
SGENR TYPE STRING,
FLID TYPE STRING,
DGUELAB TYPE STRING,
SGEBT TYPE STRING,
SSTOCKW TYPE STRING,
FLLBEZ TYPE STRING,
FLOT TYPE STRING,
LAND1 TYPE STRING,
PSTLZ TYPE STRING,
ORT01 TYPE STRING,
ORT01_MC TYPE STRING,
STRAS TYPE STRING,
STRAS_MC TYPE STRING,
REGIO TYPE STRING,END OF T_EKKO_STR.
DATA: WA_M_SHFLD_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_M_SHFLD_STR-MANDT sy-vline 
WA_M_SHFLD_STR-INTRENO sy-vline 
WA_M_SHFLD_STR-DGUELBIS sy-vline 
WA_M_SHFLD_STR-VERSION sy-vline 
WA_M_SHFLD_STR-BUKRS sy-vline 
WA_M_SHFLD_STR-SWENR sy-vline 
WA_M_SHFLD_STR-SGRNR sy-vline 
WA_M_SHFLD_STR-SGENR sy-vline 
WA_M_SHFLD_STR-FLID sy-vline 
WA_M_SHFLD_STR-DGUELAB sy-vline 
WA_M_SHFLD_STR-SGEBT sy-vline 
WA_M_SHFLD_STR-SSTOCKW sy-vline 
WA_M_SHFLD_STR-FLLBEZ sy-vline 
WA_M_SHFLD_STR-FLOT sy-vline 
WA_M_SHFLD_STR-LAND1 sy-vline 
WA_M_SHFLD_STR-PSTLZ sy-vline 
WA_M_SHFLD_STR-ORT01 sy-vline 
WA_M_SHFLD_STR-ORT01_MC sy-vline 
WA_M_SHFLD_STR-STRAS sy-vline 
WA_M_SHFLD_STR-STRAS_MC sy-vline 
WA_M_SHFLD_STR-REGIO sy-vline      INTO ld_text SEPARATED BY SPACE.

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