ABAP Select data from SAP table FRE_MALG_LMV_STY into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FRE_MALG_LMV_STY
*  INTO TABLE @DATA(IT_FRE_MALG_LMV_STY2).
*--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_FRE_MALG_LMV_STY INDEX 1 INTO DATA(WA_FRE_MALG_LMV_STY2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FRE_MALG_LMV_STY>-MANDT = 1.
<FRE_MALG_LMV_STY>-MATNR = 1.
<FRE_MALG_LMV_STY>-MEINH = 1.
<FRE_MALG_LMV_STY>-LAYGR = 1.
<FRE_MALG_LMV_STY>-LMNUM = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FRE_MALG_LMV_STY-LMVER, sy-vline,
  WA_FRE_MALG_LMV_STY-LMVAR, sy-vline,
  WA_FRE_MALG_LMV_STY-FACIN, sy-vline,
  WA_FRE_MALG_LMV_STY-EXFLG, sy-vline,
  WA_FRE_MALG_LMV_STY-SHQNM, sy-vline,
  WA_FRE_MALG_LMV_STY-SHQNO, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FRE_MALG_LMV_STY 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_FRE_MALG_LMV_STY 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_FRE_MALG_LMV_STY INTO WA_FRE_MALG_LMV_STY.


*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 MATN1, internal->external for field MATNR
CALL FUNCTION 'CONVERSION_EXIT_MATN1_OUTPUT'
  EXPORTING
    input =                      WA_FRE_MALG_LMV_STY-MATNR
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FRE_MALG_LMV_STY-MATNR.
WRITE:/ 'New Value:', ld_input.

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

*Conversion exit WLMV, internal->external for field LMVER
CALL FUNCTION 'CONVERSION_EXIT_WLMV_OUTPUT'
  EXPORTING
    input =                      WA_FRE_MALG_LMV_STY-LMVER
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_FRE_MALG_LMV_STY-LMVER.
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_FRE_MALG_LMV_STY_STR, 
MANDT TYPE STRING,
MATNR TYPE STRING,
MEINH TYPE STRING,
LAYGR TYPE STRING,
LMNUM TYPE STRING,
LMVER TYPE STRING,
LMVAR TYPE STRING,
FACIN TYPE STRING,
EXFLG TYPE STRING,
SHQNM TYPE STRING,
SHQNO TYPE STRING,
PREQN TYPE STRING,
LMV_DATE_FR TYPE STRING,
LMV_DATE_TO TYPE STRING,
FUNCTION TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FRE_MALG_LMV_STY_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_FRE_MALG_LMV_STY_STR-MANDT sy-vline 
WA_FRE_MALG_LMV_STY_STR-MATNR sy-vline 
WA_FRE_MALG_LMV_STY_STR-MEINH sy-vline 
WA_FRE_MALG_LMV_STY_STR-LAYGR sy-vline 
WA_FRE_MALG_LMV_STY_STR-LMNUM sy-vline 
WA_FRE_MALG_LMV_STY_STR-LMVER sy-vline 
WA_FRE_MALG_LMV_STY_STR-LMVAR sy-vline 
WA_FRE_MALG_LMV_STY_STR-FACIN sy-vline 
WA_FRE_MALG_LMV_STY_STR-EXFLG sy-vline 
WA_FRE_MALG_LMV_STY_STR-SHQNM sy-vline 
WA_FRE_MALG_LMV_STY_STR-SHQNO sy-vline 
WA_FRE_MALG_LMV_STY_STR-PREQN sy-vline 
WA_FRE_MALG_LMV_STY_STR-LMV_DATE_FR sy-vline 
WA_FRE_MALG_LMV_STY_STR-LMV_DATE_TO sy-vline 
WA_FRE_MALG_LMV_STY_STR-FUNCTION sy-vline      INTO ld_text SEPARATED BY SPACE.

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