[OQL] path expressions, extent aware

[Phil Warrick]

Hi all,

(Sorry for the double post, I should remember to proof-read my messages _before_ hitting the send button...)

I have the impression that OQL statements cannot use path expressions, and even if they could, they would not be extent aware. For example, I want to do the following kind of query on a class hierarchy:

class A
protected String att1

class B extends A
protected String att2

select b from b in B where b.att1 = "somethingInteresting"

One of Jakob's posts got my hopes up:
http://archives.apache.org/eyebrowse/ReadMsg?[EMAIL PROTECTED]&msgId=525022
but this doesn't seem to be valid OQL syntax for OJB (chokes on 'in').

Leandro's work seems to have added extent-aware path expressions to PB:
http://archives.apache.org/eyebrowse/ReadMsg?[EMAIL PROTECTED]&msgId=528385
I assume that the current OQL parser cannot take advantage of this?

Can anyone comment on what would is needed to be done to the ODMG layer to achieve this functionality? Is it on anyone's todo list?

I assume that if the above isn't going to happen that I could achieve what I want with the PB?

Thanks,

Phil


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