ABAP Select data from SAP table MDIF_INTEREST_RATE_VOLA_STRUC into internal table

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

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM MDIF_INTEREST_RATE_VOLA_STRUC
*  INTO TABLE @DATA(IT_MDIF_INTEREST_RATE_VOLA_STRUC2).
*--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_MDIF_INTEREST_RATE_VOLA_STRUC INDEX 1 INTO DATA(WA_MDIF_INTEREST_RATE_VOLA_STRUC2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<MDIF_INTEREST_RATE_VOLA_STRUC>-OS_GUID = 1.
<MDIF_INTEREST_RATE_VOLA_STRUC>-GUID = 1.
<MDIF_INTEREST_RATE_VOLA_STRUC>-MARKETDATACATEGORY = 1.
<MDIF_INTEREST_RATE_VOLA_STRUC>-REFERENCEINTERESTRATE = 1.
<MDIF_INTEREST_RATE_VOLA_STRUC>-VOLATILITYTYPE = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_MDIF_INTEREST_RATE_VOLA_STRUC-EFFECTIVEDATE, sy-vline,
  WA_MDIF_INTEREST_RATE_VOLA_STRUC-EFFECTIVETERM, sy-vline,
  WA_MDIF_INTEREST_RATE_VOLA_STRUC-VOLATILITY, sy-vline,
  WA_MDIF_INTEREST_RATE_VOLA_STRUC-STATUS, sy-vline,
  WA_MDIF_INTEREST_RATE_VOLA_STRUC-MESSAGE, sy-vline,
  WA_MDIF_INTEREST_RATE_VOLA_STRUC-FILELINENUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_MDIF_INTEREST_RATE_VOLA_STRUC 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_MDIF_INTEREST_RATE_VOLA_STRUC 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_MDIF_INTEREST_RATE_VOLA_STRUC INTO WA_MDIF_INTEREST_RATE_VOLA_STRUC.


*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_MDIF_INTEREST_RATE_VOLA_STRUC_STR, 
OS_GUID TYPE STRING,
GUID TYPE STRING,
MARKETDATACATEGORY TYPE STRING,
REFERENCEINTERESTRATE TYPE STRING,
VOLATILITYTYPE TYPE STRING,
EFFECTIVEDATE TYPE STRING,
EFFECTIVETERM TYPE STRING,
VOLATILITY TYPE STRING,
STATUS TYPE STRING,
MESSAGE TYPE STRING,
FILELINENUMBER TYPE STRING,END OF T_EKKO_STR.
DATA: WA_MDIF_INTEREST_RATE_VOLA_STRUC_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_MDIF_INTEREST_RATE_VOLA_STRUC_STR-OS_GUID sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-GUID sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-MARKETDATACATEGORY sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-REFERENCEINTERESTRATE sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-VOLATILITYTYPE sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-EFFECTIVEDATE sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-EFFECTIVETERM sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-VOLATILITY sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-STATUS sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-MESSAGE sy-vline 
WA_MDIF_INTEREST_RATE_VOLA_STRUC_STR-FILELINENUMBER sy-vline      INTO ld_text SEPARATED BY SPACE.

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