On 13/05/2016 10:41, Charlie Hull wrote:
On 12/05/2016 23:50, Brandon Miller wrote:
Hello, all! I'm a BloombergBNA employee and need to obtain/write a
dtSearch parser for solr (and probably a bunch of other things a little
later).
I've looked at the available parsers and thought that the surround parser
may do the trick, but it apparently doesn't like nested N or W
subqueries.
I looked at XmlQueryParser and I'm most impressed with it from a
functionality perspective. I liked the SpanQueries, but I either don't
understand SpanNot or it has a bug for the exclude.
At the end of the day, we will need to continue to support dtSearch
syntax. I may as well just bite the bullet and write the dtSearch parser
and include it as a patch for Solr.
Hi Brandon,
We have a version of a dtSearch/Lucene query parser written a few years
ago:
http://www.flax.co.uk/blog/2012/04/24/dtsolr-an-open-source-replacement-for-the-dtsearch-closed-source-search-engine/
...and I've just blogged about some of the issues one can run into with
this sort of project, hope this is useful!
http://www.flax.co.uk/blog/2016/05/13/old-new-query-parser/
Cheers
Charlie
It would need some work to bring it up to date with the latest version
of Solr (which is why we're not offering it for download any more), but
it would save you a lot of time. We've also built parsers for Verity's
query language and some others - just so you're warned, writing parsers
isn't an easy task for a beginner, often to support what looks like a
simple query in your old language can involve some quite complex work on
the Lucene side.
Best
Charlie
Here are my immediate issues:
- I don't know the best path forward on making the parser (I saw
something in the HowToContribute page at the bottom about JFlex) - Can
someone please take pity on me and help me get started down this path? I
probably won't need a lot of help.
- I'm great at .NET, not so much Java--yet. I've not yet been able to
build a trunk and "deploy" it (I can build it and run tests, but not run
it--I'm sure I'm just missing an elusive documentation link on how to do
that)
- I downloaded and got the solr trunk in Eclipse. I'm not sure the
best
way of adding unit tests for my stuff--do I add it to an existing
subdirectory or create a new package?
I think it'd be great if I could get a bare-bones example of a parser so
that I can modify it--perhaps even keeping it in a separate Java project.
Don't feel like you have to answer all of my questions--an answer to
any of
them would be quite helpful.
Thank you guys and God bless!
--
Charlie Hull
Flax - Open Source Enterprise Search
tel/fax: +44 (0)8700 118334
mobile: +44 (0)7767 825828
web: www.flax.co.uk
