Paul Elschot wrote:
I had a quick look at the sources, and I missed a parser definition file
in the svn repository. Did I miss it, and when not, could you add it?
As far as qsol syntax goes, here are some suggestions.
Qsol mostly has binary operators, but with the following
operators also as prefix a lot more would be possible.
(Since there is already a prefix form for field searches, a lookahead in the
syntax might be needed to avoid ambiguity with such prefix operators.)
Boolean:
& and | as prefix would allow easier mapping to BooleanQuery,
and an extra operator for optional clauses (just like ! now) would
allow all possibilities of BooleanQuery.
Distance:
operator ~ as prefix would allow multiple arguments to SpanNearQuery,
and with a single argument this could map to SpanFirstQuery.
Actually, with the above additions, qsol seems to be pretty close to
providing all of lucene in a single query language.
Regards,
Paul Elschot
http://www.myhardshadow.com/qsolsource/trunk/src/java/com/mhs/qsol/qsol.jtb
It's a jtb file because I am using Java Tree Builder with JavaCC. I left
out the generated .jj file as it is pretty messy and can be constructed
with the build script.
I will try and work with your suggestions Paul, thanks for taking a
look. I had tried some additions like this before without getting too
far, but certainly worth another shot. I have wanted to get back and
make some improvements and cleanup anyway. I know the whole parser could
be a lot better than it is.
Make no mistake, Qsol works great for what I made for (I have some
personal uses for it), but it could certainly be improved quite a bit.
It uses a nice infix syntax that I wanted, but overall is not nearly as
elegant as Surround.
- Mark
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