ABAP Select data from SAP table IFME_NODEFLD into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM IFME_NODEFLD
*  INTO TABLE @DATA(IT_IFME_NODEFLD2).
*--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_IFME_NODEFLD INDEX 1 INTO DATA(WA_IFME_NODEFLD2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<IFME_NODEFLD>-MAPPINGTYPE = 1.
<IFME_NODEFLD>-OUTPUTVALUEDATATYPE = 1.
<IFME_NODEFLD>-CONTENTVALUELENGTH = 1.
<IFME_NODEFLD>-CONTENTVALUELENGTHISFIXED = 1.
<IFME_NODEFLD>-CONTENTSTARTINGVALUE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_IFME_NODEFLD-CONTENTENDINGVALUE, sy-vline,
  WA_IFME_NODEFLD-VALUEOUTPUTSTRUCTUREFIELD, sy-vline,
  WA_IFME_NODEFLD-CONVERSIONRULE, sy-vline,
  WA_IFME_NODEFLD-DATEFORMAT, sy-vline,
  WA_IFME_NODEFLD-TIMEFORMAT, sy-vline,
  WA_IFME_NODEFLD-DECIMALFORMAT, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_IFME_NODEFLD 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_IFME_NODEFLD 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_IFME_NODEFLD INTO WA_IFME_NODEFLD.


*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_IFME_NODEFLD_STR, 
MAPPINGTYPE TYPE STRING,
OUTPUTVALUEDATATYPE TYPE STRING,
CONTENTVALUELENGTH TYPE STRING,
CONTENTVALUELENGTHISFIXED TYPE STRING,
CONTENTSTARTINGVALUE TYPE STRING,
CONTENTENDINGVALUE TYPE STRING,
VALUEOUTPUTSTRUCTUREFIELD TYPE STRING,
CONVERSIONRULE TYPE STRING,
DATEFORMAT TYPE STRING,
TIMEFORMAT TYPE STRING,
DECIMALFORMAT TYPE STRING,
DECIMALS TYPE STRING,
DECIMALSEPARATORCHARACTERVALUE TYPE STRING,
REFERENCEDOBJECTNAME TYPE STRING,
REFERENCECURRENCY TYPE STRING,
SOURCECONSTANTVALUE TYPE STRING,END OF T_EKKO_STR.
DATA: WA_IFME_NODEFLD_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_IFME_NODEFLD_STR-MAPPINGTYPE sy-vline 
WA_IFME_NODEFLD_STR-OUTPUTVALUEDATATYPE sy-vline 
WA_IFME_NODEFLD_STR-CONTENTVALUELENGTH sy-vline 
WA_IFME_NODEFLD_STR-CONTENTVALUELENGTHISFIXED sy-vline 
WA_IFME_NODEFLD_STR-CONTENTSTARTINGVALUE sy-vline 
WA_IFME_NODEFLD_STR-CONTENTENDINGVALUE sy-vline 
WA_IFME_NODEFLD_STR-VALUEOUTPUTSTRUCTUREFIELD sy-vline 
WA_IFME_NODEFLD_STR-CONVERSIONRULE sy-vline 
WA_IFME_NODEFLD_STR-DATEFORMAT sy-vline 
WA_IFME_NODEFLD_STR-TIMEFORMAT sy-vline 
WA_IFME_NODEFLD_STR-DECIMALFORMAT sy-vline 
WA_IFME_NODEFLD_STR-DECIMALS sy-vline 
WA_IFME_NODEFLD_STR-DECIMALSEPARATORCHARACTERVALUE sy-vline 
WA_IFME_NODEFLD_STR-REFERENCEDOBJECTNAME sy-vline 
WA_IFME_NODEFLD_STR-REFERENCECURRENCY sy-vline 
WA_IFME_NODEFLD_STR-SOURCECONSTANTVALUE sy-vline      INTO ld_text SEPARATED BY SPACE.

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