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Fetch_find problem ?

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    #1

    Fetch_find problem ?

    Dear Experts,

    order by descending of dtos(x_date)
    recno, x_date,

    9, "08/11/2013"
    451, "01/04/2013"
    tbl.index_get("dtos_tag")
    tbl.fetch_find(dtos('01/02/2013')) = -9 < ------ why the closest record is 9 ?
    tbl.fetch_find(dtos('01/03/2013')) = -9 < ------
    tbl.fetch_find(dtos('01/04/2013')) = 451
    tbl.fetch_find(dtos('01/05/2013')) = -451
    tbl.fetch_find(dtos('01/06/2013')) = -451
    tbl.fetch_find(dtos('08/10/2013')) = -451
    tbl.fetch_find(dtos('08/11/2013')) = 9
    tbl.fetch_find(dtos('08/12/2013')) = -9
    tbl.fetch_find(dtos('08/13/2013')) = -9

    query.find() also got the same result

    How to get record 451 if date is less than "01/04/2013" ?

    Thanks
    Last edited by [email protected]; 10-01-2013, 02:16 AM.
    Tags: None
    #2
    Re: Fetch_find problem ?

    Fred,

    from Help,
    If <TBL>.FETCH_FIND()is successful, the found record is retrieved and its Record_Number is returned. If no exact match is found, a negative number corresponding to the record number of the closest matching record is returned.
    You have to change the Filter Expression ,tbl.fetch_find(Filter Expression)

    Comment

      #3
      Re: Fetch_find problem ?

      Sorry, the syntex of tbl.fetch_find is not using filter expression, but Matching_expression)

      Extract from Documentation
      ==========================================
      Record_Number as N = <TBL>.FETCH_FIND( Matching_Expression as A )

      dim tbl_product as P
      dim indx_1 as P
      tbl_product = table.open("c:\data\product.dbf")
      indx_1 = tbl_product.index_primary_put("id_index")
      rec = tbl_product.fetch_find(inv_item->product_id)
      if (rec > 0) then
      on_hand = tbl_product.qty_stock
      else
      ui_msg_box("Record not found", "The closest match is record number " + abs(rec)")
      end if
      tbl_product.close()

      Comment

        #4
        Re: Fetch_find problem ?

        Seems it's a bug when the order is in "DESCENDING"
        -------------------------------------------------------------------------------
        FUNCTION XXX AS C ()
        abc = table.open("stk_tran")
        abcq = abc.query_create("D","STK_CODE="+QUOTE("232-1000IN"),"DTOS(TRAN_DATE)")
        ABC.FETCH_FIRST()
        while .not. abc.fetch_eof()
        ? DTOS(ABC.TRAN_DATE)
        ? STR(ABC.RECNO())
        ? CRLF()
        abc.fetch_next()
        end while
        ? "-----------------------------"+CRLF()
        ? "20130101 "+ STR(ABC.FETCH_FIND("20130101")) + CRLF()
        ? "20130102 "+ STR(ABC.FETCH_FIND("20130102")) + CRLF()
        ? "20130103 "+ STR(ABC.FETCH_FIND("20130103"))+ CRLF()
        ? "20130104 "+ STR(ABC.FETCH_FIND("20130104"))+ CRLF()
        ? "20130105 "+ STR(ABC.FETCH_FIND("20130105"))+ CRLF()
        ? "20130106 "+ STR(ABC.FETCH_FIND("20130106"))+ CRLF()
        ? "20130107 "+ STR(ABC.FETCH_FIND("20130107"))+ CRLF()
        ? "20130108 "+ STR(ABC.FETCH_FIND("20130108"))+ CRLF()

        ? "20130809 "+ STR(ABC.FETCH_FIND("20130809"))+ CRLF()
        ? "20130810 "+ STR(ABC.FETCH_FIND("20130810"))+ CRLF()
        ? "20130811 "+ STR(ABC.FETCH_FIND("20130811"))+ CRLF()
        ? "20130812 "+ STR(ABC.FETCH_FIND("20130812"))+ CRLF()
        ? "20130813 "+ STR(ABC.FETCH_FIND("20130813"))+ CRLF()
        ? "-----------------------------"+CRLF()
        abcq = abc.query_create("","STK_CODE="+QUOTE("232-1000IN"),"DTOS(TRAN_DATE)")
        ABC.FETCH_FIRST()
        WHILE .NOT. abc.fetch_eof()
        ? DTOS(ABC.TRAN_DATE)
        ? STR(ABC.RECNO())
        ? CRLF()
        ABC.FETCH_NEXT()
        END WHILE
        ? "-----------------------------"+CRLF()
        ? "20130101 "+ STR(ABC.FETCH_FIND("20130101")) + CRLF()
        ? "20130102 "+ STR(ABC.FETCH_FIND("20130102")) + CRLF()
        ? "20130103 "+ STR(ABC.FETCH_FIND("20130103"))+ CRLF()
        ? "20130104 "+ STR(ABC.FETCH_FIND("20130104"))+ CRLF()
        ? "20130105 "+ STR(ABC.FETCH_FIND("20130105"))+ CRLF()
        ? "20130106 "+ STR(ABC.FETCH_FIND("20130106"))+ CRLF()
        ? "20130107 "+ STR(ABC.FETCH_FIND("20130107"))+ CRLF()
        ? "20130108 "+ STR(ABC.FETCH_FIND("20130108"))+ CRLF()

        ? "20130809 "+ STR(ABC.FETCH_FIND("20130809"))+ CRLF()
        ? "20130810 "+ STR(ABC.FETCH_FIND("20130810"))+ CRLF()
        ? "20130811 "+ STR(ABC.FETCH_FIND("20130811"))+ CRLF()
        ? "20130812 "+ STR(ABC.FETCH_FIND("20130812"))+ CRLF()
        ? "20130813 "+ STR(ABC.FETCH_FIND("20130813"))+ CRLF()

        END FUNCTION

        result
        XXX()
        20130811 9
        20130104 451
        -----------------------------
        20130101 -9
        20130102 -9
        20130103 -9
        20130104 451
        20130105 -451
        20130106 -451
        20130107 -451
        20130108 -451
        20130809 -451
        20130810 -451
        20130811 9
        20130812 -9
        20130813 -9
        -----------------------------
        20130104 451
        20130811 9
        -----------------------------
        20130101 -451
        20130102 -451
        20130103 -451
        20130104 451
        20130105 -9
        20130106 -9
        20130107 -9
        20130108 -9
        20130809 -9
        20130810 -9
        20130811 9
        20130812 -9
        20130813 -9

        Comment

          #5
          Re: Fetch_find problem ?

          Fred

          I have tested from AlphaSports. It is fine with sort order.
          Code:
          vCustId ="00000012"
vGetAll =""
dim tbl as p
tbl = table.open("invoice_header")
'query.filter ="customer_id="+quote(vCustId)
query.filter =.t.
query.order ="dtos(date)"
query.options ="d"
qry = tbl.query_create()
rcd = qry.records_get()
tbl.fetch_first()
while .not. tbl.fetch_eof()
    	'vInvNumb = tbl.Invoice_number
    	'vInvDate = tbl.Date
    	
    	vGetAll = vGetall+tbl.Invoice_number+" "+tbl.Date+crlf()
    tbl.fetch_next()
end while
qry.drop()
tbl.close()
showvar(vGetall)

          How to get record 451 if date is less than "01/04/2013" ?
          Do you know the RECORD Number 451 when you enter or create a filter?
          or do you want to find the Record number 451 with your filter?

          Comment

            #6
            Re: Fetch_find problem ?

            thanks for your support, I can do the query_create without any problem even with descending option. as you see from the code, it show the correct date value and recno() value within fetch loop

            but the problem is from fetch_find() function that return the un-expected record according to the document for the closest records pointed if find() can't get the extract record.

            Thanks

            Comment

              #7
              Re: Fetch_find problem ?

              Fred,

              In according book,
              a negative number corresponding to the record number of the closest matching record is returned.
              so I think, your Filter may has a problem.


              but the problem is from fetch_find() function that return the un-expected record
              Test with fetch_find("put specific record number") , see what you get the return.
              Last edited by johnkoh; 10-02-2013, 08:23 AM.

              Comment

                #8
                Re: Fetch_find problem ?

                Thanks a lot, it's just a reduced simple sample code

                the result only have problem when the filter is in descending order
                and if the filter is in ascending order the results have no problem at all

                BTW, I have send to alphafive to clarify this problem.

                result
                XXX()
                20130811 9
                20130104 451
                -----------------------------
                20130101 -9
                20130102 -9
                20130103 -9
                20130104 451
                20130105 -451
                20130106 -451
                20130107 -451
                20130108 -451
                20130809 -451
                20130810 -451
                20130811 9
                20130812 -9
                20130813 -9
                -----------------------------
                20130104 451
                20130811 9
                -----------------------------
                20130101 -451
                20130102 -451
                20130103 -451
                20130104 451
                20130105 -9
                20130106 -9
                20130107 -9
                20130108 -9
                20130809 -9
                20130810 -9
                20130811 9
                20130812 -9
                20130813 -9

                Comment

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