ABAP Select data from SAP table MDG_CLF_LEAN_S_VALUATION_ENH into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDG_CLF_LEAN_S_VALUATION_ENH
*  INTO TABLE @DATA(IT_MDG_CLF_LEAN_S_VALUATION_ENH2).
*--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_MDG_CLF_LEAN_S_VALUATION_ENH INDEX 1 INTO DATA(WA_MDG_CLF_LEAN_S_VALUATION_ENH2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDG_CLF_LEAN_S_VALUATION_ENH>-CHARID = 1.
<MDG_CLF_LEAN_S_VALUATION_ENH>-VALCNT = 1.
<MDG_CLF_LEAN_S_VALUATION_ENH>-CLASSTYPE = 1.
<MDG_CLF_LEAN_S_VALUATION_ENH>-ECOCNTR = 1.
<MDG_CLF_LEAN_S_VALUATION_ENH>-ATWRT = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATFLV, sy-vline,
  WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATAWE, sy-vline,
  WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATFLB, sy-vline,
  WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATAW1, sy-vline,
  WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATCOD, sy-vline,
  WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATAUT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDG_CLF_LEAN_S_VALUATION_ENH 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_MDG_CLF_LEAN_S_VALUATION_ENH 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_MDG_CLF_LEAN_S_VALUATION_ENH INTO WA_MDG_CLF_LEAN_S_VALUATION_ENH.


*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 ATINN, internal->external for field CHARID
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MDG_CLF_LEAN_S_VALUATION_ENH-CHARID
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_CLF_LEAN_S_VALUATION_ENH-CHARID.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit CUNIT, internal->external for field ATAW1
CALL FUNCTION 'CONVERSION_EXIT_CUNIT_OUTPUT'
  EXPORTING
    input =                      WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATAW1
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATAW1.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit ATINN, internal->external for field ATIMB
CALL FUNCTION 'CONVERSION_EXIT_ATINN_OUTPUT'
  EXPORTING
    input =                      WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATIMB
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_MDG_CLF_LEAN_S_VALUATION_ENH-ATIMB.
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_MDG_CLF_LEAN_S_VALUATION_ENH_STR, 
CHARID TYPE STRING,
VALCNT TYPE STRING,
CLASSTYPE TYPE STRING,
ECOCNTR TYPE STRING,
ATWRT TYPE STRING,
ATFLV TYPE STRING,
ATAWE TYPE STRING,
ATFLB TYPE STRING,
ATAW1 TYPE STRING,
ATCOD TYPE STRING,
ATAUT TYPE STRING,
CHANGENO TYPE STRING,
DATUV_VAL TYPE STRING,
LKENZ_VAL TYPE STRING,
ATIMB TYPE STRING,
ATZIS TYPE STRING,
ATSRT TYPE STRING,
ATVGLART TYPE STRING,
INIT TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDG_CLF_LEAN_S_VALUATION_ENH_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_MDG_CLF_LEAN_S_VALUATION_ENH_STR-CHARID sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-VALCNT sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-CLASSTYPE sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ECOCNTR sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATWRT sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATFLV sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATAWE sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATFLB sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATAW1 sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATCOD sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATAUT sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-CHANGENO sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-DATUV_VAL sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-LKENZ_VAL sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATIMB sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATZIS sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATSRT sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-ATVGLART sy-vline 
WA_MDG_CLF_LEAN_S_VALUATION_ENH_STR-INIT sy-vline      INTO ld_text SEPARATED BY SPACE.

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