OpenEuphoria

Re: EDS

• Posted by Brian Jackson <bjackson at 2FARGON.COM> Mar 08, 2000
• 602 views

I am very impressed with EDS so far.  Simple, extensible - it's a logical
extension of Euphoria.
I have a feeling it will turn out to be a very powerful tool. OK, now for the
wish list:

1) Positional read.  I'd like to be able to use "ABCD" as my key for a
POSITIONAL read.  The "file
pointer" (or whatever the beastie is) is put just before where key ABCD would
occur in the file,
whether it's there or not.

2) Sequential key read.  Along the same lines, I'd like to have a sequential
(probably forward and
backward) read based of the key of the last record read.  That way, if I do a
positional read for the
key "JO", I could get all the records whose keys start with JO, and then
logically exit the loop.

    -- short example of some code that will display
    --   every key that starts with the characters "JO"
    object result
    sequence mykey

    result = db_positional_read("JO")
    while 1 do
        result = db_read_keysequential()

        if atom(result) then
            exit
        end if

        mykey = result[1][1..2]

        if compare(mykey, "JO")
            exit
        end if

        puts(1,"This key = " & result[1] & "\n")
    end while
    -- end code

3) Adding some kind of wildcard match on a key.  For instance, if my key was
InvoiceNumber,InvoiceDate
and I wanted to retrieve all the records for a given date, it would be nice to
wildcard match a key.

4) Maybe even a better idea would be to allow multiple indices.  This would get
around that problem and
probably be easier to implement.


Well, that's about all I can think of at the moment!  It really looks excellent
Rob.  Keep up the great work!



Brian Jackson
2FARGON Technologies

bjackson at 2fargon.com
http://www.2fargon.com