Hi,
Is it possible to create a query similar in function to multiple
SQL group by clauses?
I have documents that have a single valued fields for host name
and collection name and would like to group the results by both e.g. a result
would contain a count of the
My use case is I want to search for any substring of the indexed string and
the Suggester should suggest the indexed string. What can I do to make this
work?
Thanks,
Prathik
On Thu, Jun 6, 2013 at 2:05 AM, Mikhail Khludnev mkhlud...@griddynamics.com
wrote:
Please excuse my misunderstanding,
Can you se the ShingleFilterFactory? It is ngrams for terms rather than
characters. If you limited it to two term ngrams, when the user presses
space after their first word, you could do a suggested query against
your two term ngram field, which would suggest Jason Bourne, Jason
Statham, etc then
I want output of csv file in proper order. when I use wt=csv it gives
output in random order. Is there any way to get output in proper format.
Thanks
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This works even now i.e. when I search for Jas it suggests Jason
Bourne. What I want is when I search for Bour or ason (any substring)
it should suggest me Jason Bourne .
On Thu, Jun 6, 2013 at 12:34 PM, Upayavira u...@odoko.co.uk wrote:
Can you se the ShingleFilterFactory? It is ngrams for
Absolutely. Solr will return the reference along the docs/results; those
references may be used to look-up the actual stuff. Such use cases aren't
hard to solve.
If the use case demands returning the actual stuff alongside the results,
it becomes non-trivial, especially during high loads.
To
Is there any way to restrict the search results to only those
documents with more than N words / tokens in the searched field? I
thought that this would be an easy one to Google for, but I cannot
figure it out. or find any references. There are many references to
word size in characters, but not
I tryed to deactivate the uniquekey, but that made solr not work at all.
I got Error 500 for everything (no admin page, etc). So I had to
reactivate it.
This is my current configuration as you recommended. Unfortunatly still
no improvement. The second table doesn't get recorded. I included
Hi,
As per suggestions , changed in my config file as :
reduced document cache size from 31067 to 16384 and
autowarmcount from 2046 to 1024.
My machine RAM size is 16GB , 1 GB RAM used as index of 85GB started.
my config file as :
ramBufferSizeMB128/ramBufferSizeMB
filterCache
I recently had the same issue which could be fixed very easily. Add the
property batchSize=-1 to your dataSource-tag.
Tell me if that helped.
Am 06.06.2013 11:30, schrieb Varsha Rani:
Hi,
As per suggestions , changed in my config file as :
reduced document cache size from 31067 to 16384
Am 05.06.2013 18:09, schrieb SandeepM:
/So we see the jagged edge waveform which keeps climbing (GC cycles don't
completely collect memory over time). Our test has a short capture from
real traffic and we are replaying that via solrmeter./
Any idea why the memory climbs over time. The GC
Hi,
I am new to solr and we want to use Solr to speed up our product search.
And it is working really nice, but I think I have a problem with the indexing.
It slows down after a few minutes.
I am using the DataImportHandler to import the products from the database.
And I start the import by
Hi Stavros,
I checked it with batchSize=-1, But still the same issue.
As my single mlt query is :
http://machine_ip:8983/solr/News/mlt?q=field1:34358471qt=/mltmlt.match.include=truemlt=truemlt.mindf=1mlt.mintf=1mlt.minwl=3mlt.boost=truefq=cat:News;
AND date:[136644000 TO 1362827444000]
On Wed, Jun 5, 2013 at 9:12 PM, Jack Krupansky j...@basetechnology.com wrote:
Look in the Solr log - the error message should tell you what the multiple
values are. For example,
95484 [qtp2998209-11] ERROR org.apache.solr.core.SolrCore –
org.apache.solr.common.SolrException: ERROR:
You pretty much need to issue separate
queries against each collection and creatively
combine them. All of Solr's distributed search
stuff pre-supposes two things
1 the schemas are very similar
2 the types of docs in each collection are also
very similar.
2 is a bit subtle. If you store
I don't recall seeing any such filter. Sounds like a good idea though.
Although, maybe it is another good idea that really isn't too necessary for
solving many real world problems.
-- Jack Krupansky
-Original Message-
From: Dotan Cohen
Sent: Thursday, June 06, 2013 3:45 AM
To:
I don't know what I have to do to use the atomic update feature but I
am not aware of using it. But the way you describe it, it means that
the copyField directive does not overwrite the existing field content
and that's an easy explanation to what is happening in my case. Then
the second update
There may be a terminology problem here. In Solr land, grouping
aka field collapsing governs how the results are returned. But
from your example, it looks like you really want summary counts
rather than return documents grouped by some field.
If you want counting, take a look at pivot faceting,
What happens if you include a sort clause? Warning, I've
never tried it myself...
Best
Erick
On Thu, Jun 6, 2013 at 3:11 AM, anurag.jain anurag.k...@gmail.com wrote:
I want output of csv file in proper order. when I use wt=csv it gives
output in random order. Is there any way to get output
By and large, stored fields are pretty irrelevant for resource
consumption _except_ for
disk space consumed. Sharded systems work fine, the
stored data is stored in the index files (*.fdt and *.fdx) files in
each segment on each shard.
But you haven't told us anything about your data. How much
1. Try a simple curl command to add the document.
2. Check to see if maybe there is a duplicate copyField directive in your
schema. How many copyField directives do you have?
At least we know that it is exactly the same value duplicated and not some
other value.
-- Jack Krupansky
Your cache sizes are still much too large. I wouldn't expect
the changes you outlined to change anything. And your
autowarm sizes are still far too big. The default sizes are
512 and 0 for size and autowarm counts. Try those. In fact,
Solr will happily function (admittedly with slower queries) if
Hi All,
We create 2 dictionary's from a indexed field for auto-sugest, spell check
feature. When we configured replication from master to slave's index is
replicating properly but not the auto-suggest, spell check dictionary's.
Is there a way to replicate auto-suggest, spell check dictionary
read current state, manipulate fields and then add the document with the
same id)
Ahh... then you have an IMPLICIT reference to the field in your Java code -
you explicitly told Solr that you wanted to start with all existing field
values. Just because a field is the target of a copyField
Basically I want the Suggester to return for Jason Bourne as suggestion
for .*Bour.* regex.
Thanks,
Prathik
On Thu, Jun 6, 2013 at 12:52 PM, Prathik Puthran
prathik.puthra...@gmail.com wrote:
This works even now i.e. when I search for Jas it suggests Jason
Bourne. What I want is when I
I am just reading through this thread by chance, but doesn't this exception:
Caused by: org.apache.solr.common.SolrException: Error in
xpath:/config/luceneMatchVersion for solrconfig.xml
org.apache.solr.common.SolrException: Error in
xpath:/config/luceneMatchVersion for solrconfig.xml
Each day the index grows by ~250 MB; however I am anticipating that this
growth will slow down because there will be repetitions (just a guess). Its
not the order of growth but limitation of our infrastructure. Basically a
budgetary constraint :-)
Apparently there seems to be no problem than disk
1. Generally, any schema change requires a full reindex. Sure, a lot of
times you can squeak by, but with Solr and Lucene there are no guarantees.
If it works for you, great. If not, don't complain - just reindex. And even
if it does work for the current release, there is no guarantee that a
Someone else asked about this recently. The best approach is to count the words
at index time and add a field with the count, so title and title_len or
something like that.
wunder
On Jun 6, 2013, at 4:20 AM, Jack Krupansky wrote:
I don't recall seeing any such filter. Sounds like a good idea
I have two field in solr, Named as 10th_mark, 12th_mark. Now I want to
download that field in csv so i tried,
http://localhost:8983/solr?q=*:*wt=csvstart=0rows=10fl=10th_mark,12th_mark
But output is something like that,
th_mark
But If i put *th_mark it is giving me correct output.
Yeah, but part of the problem is that an input string is not converted to
words until analysis, which doesn't happen until after Solr creates the
Lucene Document and hands it off to Lucene. In other words (Ha!Ha!), there
are no words during the Solr-side of indexing. That said, you can always
I think you'd be better off using field names that look like Java
identifiers - e.g, mark10 instead of 10th_mark.
Actually, let me rephrase that: you SHOULD be using field names that look
like Java identifiers - less headache, all round.
On Thu, Jun 6, 2013 at 4:01 PM, anurag.jain
On 6/6/2013 3:50 AM, Bernd Fehling wrote:
What helped me a lot was switching to G1GC.
Faster, smoother, very little ripple, nearly no sawtooth.
When I tried G1, it did indeed produce a better looking memory graph,
but it didn't do anything about my GC pauses. They were several seconds
with
I want to use a core Lucene filter that will remove some tokens defined by
a regex pattern. What is the appropriate class for it?
On Thu, Jun 6, 2013 at 1:52 PM, Jack Krupansky j...@basetechnology.com wrote:
read current state, manipulate fields and then add the document with the
same id)
Ahh... then you have an IMPLICIT reference to the field in your Java code -
you explicitly told Solr that you wanted to start with
On Jun 6, 2013, at 7:24 AM, Furkan KAMACI wrote:
I want to use a core Lucene filter that will remove some tokens defined by
a regex pattern. What is the appropriate class for it?
Use a pattern replace filter. That will give you zero-length tokens, which can
cause odd matches. Follow it with a
Yeah, Java-like identifiers are best.
You should be able to wrap non-Java names in a field function:
fl=field(10th_mark),field(12th_mark)
-- Jack Krupansky
-Original Message-
From: Raymond Wiker
Sent: Thursday, June 06, 2013 10:12 AM
To: solr-user@lucene.apache.org
Subject: Re:
Got it. It's actually contrast to usual prefix suggestions.
So, out-of-the box it's provided by
http://wiki.apache.org/solr/TermsComponent terms.regex= also see last
example there
it should works by loading terms in memory and linearly scanning them with
regexp.
There is nothing more efficient
Let's clear up some things about how Solr works.
1. Solr matches individual words, not the whole text. So Jason Bourne is
split into [Jason, Bourne]. The leading .* in your pattern does not match
preceding words, it would match the beginning of a single word.
2. Query time wildcards test every
fl=field(10th_mark),field(12th_mark)
if I use wt=csv, It is giving me No output, when wt=json it is giving me
output.
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The below error clearly says that you have declared a unique id but that
unique id is missing for some documents.
org.apache.solr.common.SolrException: [doc=null] missing required field:
nameid
This is mainly because you are just trying to import 2 tables in to a
document without any
Not sure if this solution will work for you but this is what I did to
implement nested grouping using SOLR 3.X.
Simple idea behind is to Concatenate 2 fields and index them in to single
field and group on that field..
I was thinking of counting the words before the field is indexed. It is quite
possible that splitting on white space would be sufficient.
Of course, some idea of what problem this is supposed to solve would be very
helpful.
wunder
On Jun 6, 2013, at 7:07 AM, Jack Krupansky wrote:
Yeah, but
It's surprising to me that all tables have to have a relationship in
order to be used in solr. What if I have two indipendent projects
running on the same webserver? I would not be able to use Solr for both
of them, really? That would be very dissappointing...
Anyway, luckily there is an
Hi Sebastian,
What database are you using? How much RAM is available on your machine? It
looks like you're selecting from a view... Have you tried paging through
the view outside of Solr? Does that slow down as well? Do you notice any
increased load on the Solr box or the database server?
When designing for Solr (or most search engines), think in terms of documents,
not tables.
What do your search results look like? You will want one document for each
search result. The document will have stored fields for each thing displayed
and indexed fields for each thing searched.
If you
: Request to infra filed...
:
: https://issues.apache.org/jira/browse/INFRA-6345
FYI: Fixed.
-Hoss
You don't really need to have a relationship but the unique id should be
unique in a document. I had mentioned about the relationship due to the fact
that the unique key was present only in one table but not the other..
Check out this link for more information on importing multiple table data.
On 6/6/2013 4:13 AM, Sebastian Steinfeld wrote:
The amout of documents I want to index is 8 million, the first 1,6 million are
indexed in 2min, but to complete the Import it takes nearly 2 hours.
The size of the index on the hard drive is 610MB.
I started the solr server with 2GB memory.
I
Unfortunatly my two tables do not share a unique key. they both have
integers as keys starting with number 1. Is there any way to overcome
this problem? Removing the uniquekey-property from my schema.xml leads
to solr not working (I have tryed that already).
The link you provided is showing
Thanks a lot for your help!
Michael Della Bitta
Applications Developer
o: +1 646 532 3062 | c: +1 917 477 7906
appinions inc.
“The Science of Influence Marketing”
18 East 41st Street
New York, NY 10017
t: @appinions https://twitter.com/Appinions | g+:
plus.google.com/appinions
w:
On 6/6/2013 11:15 AM, Stavros Delisavas wrote:
Unfortunatly my two tables do not share a unique key. they both have
integers as keys starting with number 1. Is there any way to overcome
this problem? Removing the uniquekey-property from my schema.xml leads
to solr not working (I have tryed that
Perfect! This finally worked! Shawn, thank you a lot!
How do I set up multiple cores?
Again, thank you so much! I was looking for a solution for days!
Am 06.06.2013 19:23, schrieb Shawn Heisey:
On 6/6/2013 11:15 AM, Stavros Delisavas wrote:
Unfortunatly my two tables do not share a unique
On 6/6/2013 11:38 AM, Stavros Delisavas wrote:
Perfect! This finally worked! Shawn, thank you a lot!
How do I set up multiple cores?
Again, thank you so much! I was looking for a solution for days!
Cores are defined in solr.xml - the default example core is named
collection1. I am
Not sure if I understand your situation..I am not sure how would you relate
the data between 2 tables if theres no relationship? You are trying to just
dump random values from 2 tables in to a document?ConsiderTable1: Name
idpeter 1john2mike 3Table2:Title TitleIdCEO
Think about movies and the cast of a movie.
There are movies (title) which have their unique ids. And there are many
people (name) like the producer, actors, etc which have their unique
ids. But there are ppl who have been actor in more than one movie. Thats
why i have a third table which
Thats okay. For now, I guess it is okay. Finally I could import all 6.6
million entries successfully. I am happy.
Am 06.06.2013 19:44, schrieb Shawn Heisey:
On 6/6/2013 11:38 AM, Stavros Delisavas wrote:
Perfect! This finally worked! Shawn, thank you a lot!
How do I set up multiple cores?
Hi everyone,
My SolrCloud cluster (4.3.0) has came into production a few days ago.
Docs are being indexed into Solr using /update requestHandler, as a POST
request, containing text/xml content-type.
The collection is sharded into 36 pieces, each shard has two replicas.
There are 36 nodes (each
I have recently enabled facet.missing=true in solrconfig.xml which gives
null facet values also. As I understand it, the syntax to do a faceted
search on a null value is something like this:
fq=-price:[* TO *]
So when I want to search on a particular value (for example : 4) OR null
value, I would
On 6/6/2013 12:28 PM, Rahul R wrote:
I have recently enabled facet.missing=true in solrconfig.xml which gives
null facet values also. As I understand it, the syntax to do a faceted
search on a null value is something like this:
fq=-price:[* TO *]
So when I want to search on a particular value
In 3.x Solr (and earlier) I was able to create a new xslt doc in the
conf/xslt directory and immediately start using it.
In my 4.1 setup, I have:
queryResponseWriter name=xslt class=solr.XSLTResponseWriter
int name=xsltCacheLifetimeSeconds5/int
/queryResponseWriter
But after that small
I was looking at this wiki and linked issues:
http://wiki.apache.org/solr/LotsOfCores
they talk about a limit being 100K cores. Is that per server or per
entire fleet because zookeeper needs to manage that?
I was considering a use case where I have tens of millions of indices
but less that a
bq: I am anticipating that this growth will slow down because there
will be repetitions
This will be true for your indexed data, but NOT for your stored data.
Each stored
field is stored as-is per document. It'll be compressed, so won't take
up the entire
250M, but it'll still be stored.
FWIW,
100K is really not the limit, it's just hard to imagine
100K cores on a single machine unless some were
really rarely used. And it's per node, not cluster-wide.
The current state is that everything is in place, including
transient cores, auto-discovery, etc. So you should be
able to go ahead and
Hello Wiki Admins,
I have been using Solr for a few years now and I would like to
contribute back by making minor changes and clarifications to the wiki
documentation.
Wiki User Name : JoshLincoln
Thanks
Done, thanks!
On Thu, Jun 6, 2013 at 3:47 PM, Josh Lincoln josh.linc...@gmail.com wrote:
Hello Wiki Admins,
I have been using Solr for a few years now and I would like to
contribute back by making minor changes and clarifications to the wiki
documentation.
Wiki User Name : JoshLincoln
hi all
We are having a problem getting Solr4.1 (Solr 4.3 is also not starting)
to run in Websphere on Windows.
Websphere version? [8.0.0.3]
Windows version? [Win7 64bit]
Solr version? [4.1]
JDK version? [1.7.0_13 64bit]
Here is the error that none of us have ever seen before. Can somebody
On Thu, Jun 6, 2013, at 07:54 PM, Christopher Gross wrote:
In 3.x Solr (and earlier) I was able to create a new xslt doc in the
conf/xslt directory and immediately start using it.
In my 4.1 setup, I have:
queryResponseWriter name=xslt class=solr.XSLTResponseWriter
int
I am trying to configure nutch 1.4 with solr 3.4.
I configured everything and when I run the command:
./nutch crawl urls -dir myCrawl2 -solr http://localhost:8080 -depth 2 -topN
2
I get the following error:
java.io.IOException: Job failed!
SolrDeleteDuplicates: starting at 2013-06-06 15:49:30
can you check if you have correct solrj client library version in both nutch
and Solr server.
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On 6/6/2013 1:57 PM, abillav...@innoventsolutions.com wrote:
We are having a problem getting Solr4.1 (Solr 4.3 is also not starting)
to run in Websphere on Windows.
Websphere version? [8.0.0.3]
Windows version? [Win7 64bit]
Solr version? [4.1]
JDK version? [1.7.0_13 64bit]
Based on seeing
As suggested by Shawn try to change the JVM, this might resolve your issue.
I had seen this error ':java.lang.VerifyError' before (not specific to SOLR)
when compiling code using JDK1.7.
After some research I figured out the code compiled using Java 1.7 requires
stack map frame instructions. If
: Based on seeing java.lang.J9VMInternals in your log, I am guessing that your
: JVM is IBM's J9, not Oracle. The Java from IBM is notoriously buggy when it
: comes to running Lucene and Solr. Try Oracle, version 1.7.0_21.
Note specifically the excellent verbage here...
Seems like this feature is still yet to be implemented..
https://issues.apache.org/jira/browse/SOLR-866
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: ./nutch crawl urls -dir myCrawl2 -solr http://localhost:8080 -depth 2 -topN
...
: Caused by: org.apache.solr.common.SolrException: Not Found
:
: Not Found
:
: request: http://localhost:8080/select?q=id:[* TO
: *]fl=idrows=1wt=javabinversion=2
...
: Other possibly helpful
Thank you
This sure is a lot to chew on
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Hi,
Try running jstat to see if the heap is full. 4gb is not much and could
easily be eaten by structures used for sorting, facetting, and caching.
Plug: SPM has a new feature that lets you send graphs with various metrics
to Solr mailing list. I'd personally look at the GC graphs to see if GC
Now Jack. You know it depends G Just answer
the questions how many simultaneous cores can you
open on your hardware, and what's the maximum percentage
of the cores you expect to be open at any one time.
Do some math and you have your answer.
The meta-data, essentially anything in the core
From the book, here's an update request processor chain which will count the
words in the content field and place it in the content_len_I field. Then
you could do a range query on that count.
updateRequestProcessorChain name=regex-count-words
!-- Start with a copy of the content field --
Hi
Ngrams *will* do this for you.
Otis
Solr ElasticSearch Support
http://sematext.com/
On Jun 6, 2013 7:53 AM, Prathik Puthran prathik.puthra...@gmail.com
wrote:
Basically I want the Suggester to return for Jason Bourne as suggestion
for .*Bour.* regex.
Thanks,
Prathik
On Thu, Jun 6,
Inspired by multiple Solr mailing list entries during the last month or two, I
did some search performance testing on our 11M documents / 49GB index using
logged queries on Solr 4 with MMapDirectory. It turns out that our setup with
Solid State Drives and 8GB of RAM (which leaves 5GB for disk
I would not try putting tens of millions of cores on one machine. My
question (and I think Jack's as well) was around having them across a
fleet, say if I need 1M then I'd get 100 machines appropriately sized
for 10K each. I was clarifying because there was some talk about
ZooKeeper only being
Inspired by multiple Solr mailing list entries during the last month or
two, I did some search performance testing on our 11M documents / 49GB
index using logged queries on Solr 4 with MMapDirectory. It turns out that
our setup with Solid State Drives and 8GB of RAM (which leaves 5GB for
disk
I'm glad Erick finally answered my question (I think I actually asked it on
the original Jira) concerning the rough magnitude of Lots - it's
hundreds/thousands, but not hundreds of thousands, millions, or tens of
millions.
So, if an app needs millions, I think that suggests a MegaCores
Shawn Heisey [s...@elyograg.org]:
This is awesome! Concrete info is better than speculation.
Thank you.
I think it might be time to split the SSD section of
SolrPerformanceProblems into its own wiki page and expand it.
That might be a good idea. It would also be interesting to try and
I've seen reference to an HdfsDirectoryFactory in the new Cloudera Search
along with a commit in the Solr SVN (
http://svn.apache.org/viewvc/lucene/dev/trunk/solr/core/src/test-files/solr/collection1/conf/solrconfig-tlog.xml?view=markup),
is this something that is being made part of the core?
Nabeel,
I just want to say, that though this post is very old, in the entire
internet of this error, your suggestion of moving out of /home/user/solr
into /opt/solr was the one that worked for me too
Thank you!
Anria
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3. Too hard to say from the way you have described it. Show us some sample
input.
Jack,
Here you go.
*Row X*
column1: data here
column2: more data here
...
user_id: 2002
*Row Y*
column1: data here
column2: more data here
...
user_id: 45
*Row Z*
column1: data here
column2: more data here
...
I want to query against one user_id in the string.
eg user_id:2002+AND+created:[${from}+TO+${until}]+data:more
So all of the records with a 2002 in user_id need to be returned and only
those records. If this can only be guaranteed by having user_id be an
integer, then that is fine, but I would
Okay, now, how about a few queries that you want to use? Do you want to
query by parts of the user ID, or only by the whole (exact) value?
If the user ID will be a string, fine, but having spaces makes it a little
more painful to enter in a query - maybe use dashes.
-- Jack Krupansky
eg user_id:2002+AND+created:[${from}+TO+${until}]+data:more
Expected results: return row XYZ but ignore this row:
column1: data here
column2: more data here
...
user_id: 45 15001 45664
*Row X*
column1: data here
column2: more data here
...
user_id: 2002
*Row Y*
column1: data here
In that case, you will need to keep two copies of the user ID, one which is
a single, complete string, and one which is a tokenized field text/TextField
so that you can do a keyword search against it. Use the string/StrField as
the main copy and then use a copyField directive in the schema to
The unique key is an auto-incremented int in the db. Sorry for having
given the impression that user_id is the unique key per document. This is
a table of events that are happening as users interact with our system.
It just so happens that we were inserting individual records for each user
On 6/6/2013 6:32 PM, Jack Krupansky wrote:
big snip
This would be a lot more of a true Solr Cloud than the cluster
support that we have today.
And the CloudKeeper itself might be a traditional SolrCloud cluster,
except that it needs to be multi-data center.
I like a lot of what you said
To be clear, one normally doesn't do queries on portions of an ID -
usually it is one integrated string.
Further strings are definitely NOT tokenized in Solr.
Your story keeps changing, which is why I have to keep hedging my answers.
At least with your latest store, your user_id should be a
My language might be a bit off (I am saying string when I probably mean
text in the context of solr), but I'm pretty sure that my story is
unwavering ;)
`id` int(11) NOT NULL AUTO_INCREMENT
`created` int(10)
`data` varbinary(255)
`user_id` int(11)
So, imagine that we have 1000 entries come in
This is very interesting. Thanks for sharing the benchmark.
One question I have is did you precondition the SSD (
http://www.sandforce.com/userfiles/file/downloads/FMS2009_F2A_Smith.pdf )? SSD
performance tends to take a very deep dive once all blocks are written at least
once and the garbage
Thank you Shawn. This does work. To help me understand better, why do
we need the *:* ? Shouldn't it be implicit ?
Shouldn't
fq=(price:4+OR+(-price:[* TO *])) //does not work
mean the same as
fq=(price:4+OR+(*:* -price:[* TO *])) //works
Why does Solr need the *:* there ?
On Fri, Jun
On 6/6/2013 11:21 PM, Rahul R wrote:
Thank you Shawn. This does work. To help me understand better, why do
we need the *:* ? Shouldn't it be implicit ?
Shouldn't
fq=(price:4+OR+(-price:[* TO *])) //does not work
mean the same as
fq=(price:4+OR+(*:* -price:[* TO *])) //works
Why
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