All,
I've found that figuring out the subtle nuances of the query language is a
*daunting* task for someone unfamiliar with SOLR.
I'm not aware of any comprehensive documentation (in the form of a tutorial
or similar really useful tool)
It seems the information is scattered all over the place an has to be dug
out piecemeal... Typical for open-source projects. Yes, I've seen the
wiki - and it's not too far from a man page. Everything that is possible
(in theory) is contained in the api, but that is not the same thing as a
large set of examples that *show* how to use it.
So, three questions:
1. Is there somewhere that really dives into the use of the query language
(like a tutorial)?
2. Assuming not, is there a web page that at least contains a majority of
the links to various sources to assist someone in studying?
3. Is there any interest in having someone do this documentation / tutorial
creation?
3a. If the answer to 3 is yes - are the committers/solr experts
willing to volunteer to answer questions via email if I build the tutorial?
If the answer to 3 is yes and yes - I cut my teeth in the industry 20 years
ago as a Tech Writer and Instructional Designer. I will build and publish
the tutorial - but I don't have the time to dig out all the info the hard
way - which is why I asked 3a...
On Sat, Sep 10, 2016 at 11:20 AM, Erick Erickson <erickerick...@gmail.com>
wrote:
> Background for Shawn's comments can be found here:
>
> https://lucidworks.com/blog/2011/12/28/why-not-and-or-and-not/
>
> Solr's query language is NOT strict boolean logic as explained
> above. Although with proper grouping (parenthesizing) and tricks
> like Shawn mentioned it can be pretty close.
>
> Best,
> Erick
>
> On Fri, Sep 9, 2016 at 9:17 PM, Shawn Heisey <apa...@elyograg.org> wrote:
> > On 9/9/2016 9:17 PM, Prasanna S. Dhakephalkar wrote:
> >> Further search on net got me answer
> >>
> >> The query to be
> >>
> >> a_id:20 OR (*:* NOT a_id:*)
> >>
> >> I don't understand this syntax
> >
> > The basic problem here is that negative queries don't work. If you're
> > going to subtract X, you have to start with something (like all docs),
> > or the result is nothing.
> >
> > For simple queries (just a single "-field:X" clause), Solr is able to
> > detect the unworkable situation and implicitly add a "*:*" starting
> > point, so the query works.
> >
> > When the query has ANY complexity, Solr's negative query detection isn't
> > possible, and the query can't be fixed automatically, so it doesn't work.
> >
> > Thanks,
> > Shawn
> >
>
