ABAP Select data from SAP table ICAINTERESTSUPP into internal table

Get Example source ABAP code based on a different SAP table
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Below is a number of ABAP code snippets to demonstrate how to select data from SAP ICAINTERESTSUPP 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 ICAINTERESTSUPP. 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 ICAINTERESTSUPP 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_ICAINTERESTSUPP TYPE STANDARD TABLE OF ICAINTERESTSUPP,
      WA_ICAINTERESTSUPP TYPE ICAINTERESTSUPP,
      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: <ICAINTERESTSUPP> TYPE ICAINTERESTSUPP.

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

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

*Select data and declare internal table using in-line method @DATA
*SELECT *
*  FROM ICAINTERESTSUPP
*  INTO TABLE @DATA(IT_ICAINTERESTSUPP2).
*--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_ICAINTERESTSUPP INDEX 1 INTO DATA(WA_ICAINTERESTSUPP2).


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

*To update a field value using a field symbol simply change the value via the field symbol pointer
<ICAINTERESTSUPP>-MANDT = 1.
<ICAINTERESTSUPP>-CAINTERESTDOCUMENT = 1.
<ICAINTERESTSUPP>-CAINTERESTITEMNUMBER = 1.
<ICAINTERESTSUPP>-CADOCUMENTNUMBER = 1.
<ICAINTERESTSUPP>-CAREPETITIONITEMNUMBER = 1.

ENDLOOP.

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

*Write selected data to screen/report before conversion.
  WRITE:/ sy-vline,   WA_ICAINTERESTSUPP-CABPITEMNUMBER, sy-vline,
  WA_ICAINTERESTSUPP-CASUBITEMNUMBER, sy-vline,
  WA_ICAINTERESTSUPP-CAINTERESTSEQUENCENUMBER, sy-vline,
  WA_ICAINTERESTSUPP-INTERESTCALCSTARTDATE, sy-vline,
  WA_ICAINTERESTSUPP-INTERESTCALCENDDATE, sy-vline,
  WA_ICAINTERESTSUPP-CASUBSTITUTEDOCUMENTNUMBER, sy-vline.
ENDLOOP.
   
*Add any further fields from structure WA_ICAINTERESTSUPP 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_ICAINTERESTSUPP 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_ICAINTERESTSUPP INTO WA_ICAINTERESTSUPP.


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

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

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

*Conversion exit ALPHA, internal->external for field CASECURITYDEPOSIT
CALL FUNCTION 'CONVERSION_EXIT_ALPHA_OUTPUT'
  EXPORTING
    input =                      WA_ICAINTERESTSUPP-CASECURITYDEPOSIT
  IMPORTING
    output =                     ld_input.
WRITE:/ 'Org Value:', WA_ICAINTERESTSUPP-CASECURITYDEPOSIT.
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_ICAINTERESTSUPP_STR, 
MANDT TYPE STRING,
CAINTERESTDOCUMENT TYPE STRING,
CAINTERESTITEMNUMBER TYPE STRING,
CADOCUMENTNUMBER TYPE STRING,
CAREPETITIONITEMNUMBER TYPE STRING,
CABPITEMNUMBER TYPE STRING,
CASUBITEMNUMBER TYPE STRING,
CAINTERESTSEQUENCENUMBER TYPE STRING,
INTERESTCALCSTARTDATE TYPE STRING,
INTERESTCALCENDDATE TYPE STRING,
CASUBSTITUTEDOCUMENTNUMBER TYPE STRING,
CASUBSTITUTEDOCUMENTCATEGORY TYPE STRING,
CAINTERESTCATEGORY TYPE STRING,
CURRENCY TYPE STRING,
CAAMOUNTINTRANSACTIONCURRENCY TYPE STRING,
CAINTERESTCODE TYPE STRING,
CAINTERESTRATE TYPE STRING,
CAINTERESTAMOUNTINTRANSCRCY TYPE STRING,
CAINTERESTGROUP TYPE STRING,
CAINTERESTISCREATEDBYROUNDING TYPE STRING,
CASECURITYDEPOSIT TYPE STRING,
CAINTERESTCALCMONTHLYCALDAY TYPE STRING,
CAINTERESTISCALCULATEDALREADY TYPE STRING,
CAINTERESTISCREATEDBYTAXPOSTG TYPE STRING,END OF T_EKKO_STR.
DATA: WA_ICAINTERESTSUPP_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_ICAINTERESTSUPP_STR-MANDT sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTDOCUMENT sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTITEMNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CADOCUMENTNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CAREPETITIONITEMNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CABPITEMNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CASUBITEMNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTSEQUENCENUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-INTERESTCALCSTARTDATE sy-vline 
WA_ICAINTERESTSUPP_STR-INTERESTCALCENDDATE sy-vline 
WA_ICAINTERESTSUPP_STR-CASUBSTITUTEDOCUMENTNUMBER sy-vline 
WA_ICAINTERESTSUPP_STR-CASUBSTITUTEDOCUMENTCATEGORY sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTCATEGORY sy-vline 
WA_ICAINTERESTSUPP_STR-CURRENCY sy-vline 
WA_ICAINTERESTSUPP_STR-CAAMOUNTINTRANSACTIONCURRENCY sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTCODE sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTRATE sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTAMOUNTINTRANSCRCY sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTGROUP sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTISCREATEDBYROUNDING sy-vline 
WA_ICAINTERESTSUPP_STR-CASECURITYDEPOSIT sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTCALCMONTHLYCALDAY sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTISCALCULATEDALREADY sy-vline 
WA_ICAINTERESTSUPP_STR-CAINTERESTISCREATEDBYTAXPOSTG sy-vline      INTO ld_text SEPARATED BY SPACE.

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