Re: [hibernate-dev] HHH-16...
On Wednesday 05 September 2007 01:48:31 pm James Carman wrote:
All,
I would like to get this thing working (the join ... on ... syntax
stuff). I have begun work on it already (got a build working, started
digging into ANTLR grammar, etc.), but I would appreciate any guidance
that you folks could provide. I started by adding a couple of test
cases and trying to figure out where in the heck this stuff goes
haywire! Right now, I'm looking into the SqlGenerator class as it
seems that's where the meat of this is going to be. I'm not an ANTLR
expert, so that's probably been taking me the most time to wrap my
head around. Again, any help you guys can provide would be greatly
appreciated, both by me and my client, since they're footing the bill
for this development effort (we need it on our project).
James
_______________________________________________
hibernate-dev mailing list
hibernate-dev(a)lists.jboss.org
https://lists.jboss.org/mailman/listinfo/hibernate-dev
The very first thing I would do is to split the roles currently filled by
FromElement into two separate node types (one for the join and one for the
persister reference) because currently this is all munged together. It'll
make this easier to work with.
The big difficulty is somehow tracking the property references as they are
being resolved so that you know what is the right side and left side of the
join.
This whole problem is easier to solve when we move from 3 phases to 4 phases,
which is the reason this was put on the back burner in the first place.
There is a branch where i started prototyping some of this work:
http://anonsvn.jboss.org/repos/hibernate/core/branches/HQL_ANTLR_2/ You
might want to take a look there for some ideas.