ABAP Select data from SAP table FM01DDY into internal table

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Below is a number of ABAP code snippets to demonstrate how to select data from SAP FM01DDY 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 FM01DDY. 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 FM01DDY 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_FM01DDY TYPE STANDARD TABLE OF FM01DDY,
      WA_FM01DDY TYPE FM01DDY,
      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: <FM01DDY> TYPE FM01DDY.

*Process all fields in table header/work area as string values
  PERFORM process_as_string_field_values CHANGING wa_FM01DDY.

SELECT *
*restrict ABAP select to first 10 rows
 UP TO 10 ROWS      
  FROM FM01DDY
  INTO TABLE IT_FM01DDY.

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM FM01DDY
*  INTO TABLE @DATA(IT_FM01DDY2).
*--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_FM01DDY INDEX 1 INTO DATA(WA_FM01DDY2).


*Demonstrate how to loop at an internal table and update values using a FIELD-SYMBOL
LOOP AT IT_FM01DDY ASSIGNING <FM01DDY>.

*To update a field value using a field symbol simply change the value via the field symbol pointer
<FM01DDY>-XPOR_AUTO = 1.
<FM01DDY>-XPOR_MAKNT = 1.
<FM01DDY>-XPOR_NOREL = 1.
<FM01DDY>-XGIS_NOREL = 1.
<FM01DDY>-XGIS_NOBSX = 1.

ENDLOOP.

LOOP AT IT_FM01DDY INTO WA_FM01DDY.
*Write horizonal line to screen report.
  WRITE:/ sy-uline.

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_FM01DDY-XGIS_BOTH, sy-vline,
  WA_FM01DDY-XGOODSR, sy-vline,
  WA_FM01DDY-XINVOICE, sy-vline,
  WA_FM01DDY-XGR_AND_INV, sy-vline,
  WA_FM01DDY-XMWST_NET, sy-vline,
  WA_FM01DDY-XMWST_BRU, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_FM01DDY 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_FM01DDY 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_FM01DDY INTO WA_FM01DDY.


*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_FM01DDY_STR, 
XPOR_AUTO TYPE STRING,
XPOR_MAKNT TYPE STRING,
XPOR_NOREL TYPE STRING,
XGIS_NOREL TYPE STRING,
XGIS_NOBSX TYPE STRING,
XGIS_BOTH TYPE STRING,
XGOODSR TYPE STRING,
XINVOICE TYPE STRING,
XGR_AND_INV TYPE STRING,
XMWST_NET TYPE STRING,
XMWST_BRU TYPE STRING,
XMWST_SEP TYPE STRING,
XPRE_BAFDT TYPE STRING,
XPRE_DELDT TYPE STRING,
XPOR_BESDT TYPE STRING,
XPOR_DELDT TYPE STRING,
XPOR_FADAT TYPE STRING,
XPAY_BUDAT TYPE STRING,
XPAY_PADAT TYPE STRING,
XINV_BUDAT TYPE STRING,
XINV_FADAT TYPE STRING,
XPC_ACC TYPE STRING,
XCOREAL TYPE STRING,
XCURRNAME TYPE STRING,END OF T_EKKO_STR.
DATA: WA_FM01DDY_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_FM01DDY_STR-XPOR_AUTO sy-vline 
WA_FM01DDY_STR-XPOR_MAKNT sy-vline 
WA_FM01DDY_STR-XPOR_NOREL sy-vline 
WA_FM01DDY_STR-XGIS_NOREL sy-vline 
WA_FM01DDY_STR-XGIS_NOBSX sy-vline 
WA_FM01DDY_STR-XGIS_BOTH sy-vline 
WA_FM01DDY_STR-XGOODSR sy-vline 
WA_FM01DDY_STR-XINVOICE sy-vline 
WA_FM01DDY_STR-XGR_AND_INV sy-vline 
WA_FM01DDY_STR-XMWST_NET sy-vline 
WA_FM01DDY_STR-XMWST_BRU sy-vline 
WA_FM01DDY_STR-XMWST_SEP sy-vline 
WA_FM01DDY_STR-XPRE_BAFDT sy-vline 
WA_FM01DDY_STR-XPRE_DELDT sy-vline 
WA_FM01DDY_STR-XPOR_BESDT sy-vline 
WA_FM01DDY_STR-XPOR_DELDT sy-vline 
WA_FM01DDY_STR-XPOR_FADAT sy-vline 
WA_FM01DDY_STR-XPAY_BUDAT sy-vline 
WA_FM01DDY_STR-XPAY_PADAT sy-vline 
WA_FM01DDY_STR-XINV_BUDAT sy-vline 
WA_FM01DDY_STR-XINV_FADAT sy-vline 
WA_FM01DDY_STR-XPC_ACC sy-vline 
WA_FM01DDY_STR-XCOREAL sy-vline 
WA_FM01DDY_STR-XCURRNAME sy-vline      INTO ld_text SEPARATED BY SPACE.

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