There are solr query strings available from the log ,and the intent is to analyze the query to find out number fqs ,terms etc. Is there any api/parser available in solr/lucene to parse the entire query string and get the terms used ,filters used ,languages used ,fields used etc. Looked at QueryParser provided by lucene ,but it doesn't seem to help.
Example simple query string:
q=*:*&facet.field=Language&facet=true&f.Language.facet.limit=101&rows=0&sort=score desc,DefaultRelevance desc&fl=xxNonexx&bmf=50&wt=xml
You can use the SolrRequestParsers.parseQueryString() method to convert the string into Solr Params. Here's a link to documentation for it.
Below is an example.
String queryString = "q=*:*&facet.field=Language&facet=true&f.Language.facet.limit=101&rows=0&sort=score desc,DefaultRelevance desc&fl=xxNonexx&bmf=50&wt=xml";
MultiMapSolrParams solrParams = SolrRequestParsers.parseQueryString(String);
The code resides in the solr-core library, so you may need to add it.
I think you're not really looking for a parser but for a way to debug your query. Fortunately Solr has a debug parameter that you can use for such purpose as explained here. For instance you can add to your query:
q=*:*&facet.field=Language&facet=true&f.Language.facet.limit=101&rows=0&sort=score desc,DefaultRelevance desc&fl=xxNonexx&bmf=50&debug=true&wt=xml
Related
i just built a search form backed by solr, we are using the solarium library to construct our requests.
we built a "huge" collection of filterqueries like that one:
$query = $client->createQuery($client::QUERY_SELECT);
$query->setStart(0)->setRows(1000);
$query->addFilterQuery($query->createFilterQuery("foo")->setQuery("bar:true"));
$query->addFilterQuery($query->createFilterQuery("fo")->setQuery("ba:false"));
....
but we realized that the search just hits all the single fields we specify in the filterqueries, but we have to actually query multiple fields. while reading the docs i realized we could have been wrong, right? the correct approach would be to use disMax queries (in combination with facets?)? im wondering, can we use DisMax in combination with filterqueries to "expand" our search to multiple fields (with boosts) ? or do we have to actually rework everything?
im kinda missing the big picture to decide what the best/working solution would be
help is much appreciated
edit:
solr:
solr-spec 7.6.0
solarium:
solarium/solarium 6.0.1 PHP Solr client
You can give a query parser when giving the fq argument:
fq={!dismax qf="firstfield secondfield^5"}this is my query
The syntax is known as Local Parameters. Since dismax (or edismax which you should normally use now) doesn't have a identifier in front of it, it is implicitly parsed as the type.
If a local parameter value appears without a name, it is given the implicit name of "type". This allows short-form representation for the type of query parser to use when parsing a query string.
You'll have to make sure that Solarium doesn't escape the value you give to setQuery, but seeing as you're already giving a field:value combination, it doesn't seem to get escaped. Double check the Solr log to see exactly what query is being sent to Solr (or ask Solarium to give you the exact query string being sent if possible).
Anybody pleasee help.I am new to Solr.My project uses Solrj api to access solr in java code.I don't understand the different steps in querying with solr and solrj.I got ths following code from net.Can anyone please describe the importance of these statements.?
public class SolrJSearcher {
public static void main(String[] args) throws MalformedURLException, SolrServerException {
HttpSolrServer solr = new HttpSolrServer("http://localhost:8983/solr");
SolrQuery query = new SolrQuery();
query.setQuery("sony digital camera");
query.addFilterQuery("cat:electronics","store:amazon.com");
query.setFields("id","price","merchant","cat","store");
query.setStart(0);
query.set("defType", "edismax");
QueryResponse response = solr.query(query);
SolrDocumentList results = response.getResults();
for (int i = 0; i < results.size(); ++i) {
System.out.println(results.get(i));
}
}
}
You'll have to read up on Solr concepts to actually use SolrJ for anything useful, so that you're able to tell what the different parts of the API are. I'm not going to go into any detail here, and you should really research a concept more before posting a very broad and basic question. I'll answer it for further reference for anyone stumbling across this post from the Internet anyway, or if anyone need to reference it from another post.
setQuery - The actual query to send to Solr. This is what usually goes in the q parameter when reading the Solr documentation. The format of the query depends on which query parser you're using (which is edismax here, I'll get back to that). Lucene query syntax in general is field:value.
addFilterQuery - Filter the search result by the values supplied. This is what you'll see in the fq parameter in the Solr docs. A filter query doesn't affect scoring, it just filters the search result returned by Solr by removing any documents that doesn't match the filter query.
setFields - Which fields to return from the index. If you don't need all the fields, you can cut down the size of the response from Solr by just requesting the fields you need.
setStart - The offset of the query result, which document hit to start retrieving data from. Useful for pagination.
set - Set any parameter that isn't available through dedicated methods. Here the parameter defType is set, which tells Solr which query parser to use. edismax is one such query parser, that accepts queries in a natural format like you'd expect most people to be familiar with from general search engines.
query - Performs the actual query on the Solr server, and retrieves the result. The response is returned, and then used to get the list of documents in the result (getResults ).
The results are then printed out one by one.
My requirement is simple.
I need to search with the keyword similar to SQL LIKE.
Now the search shows results for "words" rather than checking partial characters.
Ex:-
Search query: "test"
Expected results: "test%" - Which gives "test", "tested",
"testing", etc...
Actual result: "test"
I found many query suggestions for SOLR. But I need to find the exact mechanism to put that on conf xml files.
Thanks in advance.
The quick and dirty solution is to use wildcard in your search query using an asterisk (*). For example: test*
The more proper solution would be to use stemming to remove common word endings when you index and query the data. In the default schema, the text_en_splitting field type would do this for you. Just define your field as text_en_splitting.
Are you building auto-complete?
If so, use Suggester. It's part of Solr, and it does what you're talking about extremely efficiently using either a dictionary file, or a field in your index you've designated.
http://wiki.apache.org/solr/Suggester
I am trying to make a query in solr.net that generates a solr query with a filter query with more than one term in it e.g.: fq=Size:(4 large)
However, when I pass ?f_Size=(4 large) in the query string to the SolrNet sample app (found here: http://code.google.com/p/solrnet/downloads/list), no results are found.
Looking at the logs, I can see that the filter query generated is fq=Size:"\(4+large\)" so it makes sense that no results are found.
Is there a way in SolrNet to generate a filter query with more than one term?
Where the filter queries are built, try replacing Query.Field(...).Is(...) with Query.Simple(...) (you have to build the query yourself). See the wiki for reference.
Solr newbie here.
I have created a Solr index and write a whole bunch of docs into it. I can see
from the Solr admin page that the docs exist and the schema is fine as well.
But when I perform a search using a test keyword I do not get any results back.
On entering * : *
into the query (in Solr admin page) I get all the results.
However, when I enter any other query (e.g. a term or phrase) I get no results.
I have verified that the field being queried is Indexed and contains the values I am searching for.
So I am confused what I am doing wrong.
Probably you don't have a <defaultSearchField> correctly set up. See this question.
Another possibility: your field is of type string instead of text. String fields, in contrast to text fields, are not analyzed, but stored and indexed verbatim.
I had the same issue with a new setup of Solr 8. The accepted answer is not valid anymore, because the <defaultSearchField> configuration will be deprecated.
As I found no answer to why Solr does not return results from any fields despite being indexed, I consulted the query documentation. What I found is the DisMax query parser:
The DisMax query parser is designed to process simple phrases (without complex syntax) entered by users and to search for individual terms across several fields using different weighting (boosts) based on the significance of each field. Additional options enable users to influence the score based on rules specific to each use case (independent of user input).
In contrast, the default Lucene parser only speaks about searching one field. So I gave DisMax a try and it worked very well!
Query example:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video
You can also specify which fields to search exactly to prevent unwanted side effects. Multiple fields are separated by spaces which translate to + in URLs:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video&qf=features+text
Last but not least, give the fields a weight:
http://localhost:8983/solr/techproducts/select?defType=dismax&q=video&qf=features^20.0+text^0.3
If you are using pysolr like I do, you can add those parameters to your search request like this:
results = solr.search('search term', **{
'defType': 'dismax',
'qf': 'features text'
})
In my case the problem was the format of the query. It seems that my setup, by default, was looking and an exact match to the entire value of the field. So, in order to get results if I was searching for the sit I had to query *sit*, i.e. use wildcards to get the expected result.
With solr 4, I had to solve this as per Mauricio's answer by defining type="text_en" to the field.
With solr 6, use text_general.