Menu
i need to do not queries on my lucene index. Lucene currently allows not only when we have two or more terms in the query:
So I can do something like:
country:canada not sweden
but I can't run a query like:
country:not sweden
Could you please let me know if there is some efficient solution for this problem
Thanks
219
The short answer is that this is not possible using the standard Lucene. Lucene does not allow NOT queries as a single term for the same reason it does not allow prefix queries - to perform either, the engine would have to look through each document to ascertain whether the document is/is not a hit.
Lucene supports fielded data. When performing a search you can either specify a field, or use the default field. The field names and default field is implementation specific. You can search any field by typing the field name followed by a colon ":" and then the term you are looking for.
To use the Lucene syntax, open the Saved query menu, and then select Language: KQL > Lucene. To search for a range of values, use the bracketed range syntax, [START_VALUE TO END_VALUE] . For example, to find entries that have 4xx status codes, you could enter status:[400 TO 499] .
Despite these open-source bona fides, it's still surprising to see someone at Google adopting Solr, an open-source search server based on Apache Lucene, for its All for Good site. Google is the world's search market leader by a very long stretch.
A very late reply, but it might be useful for somebody else later:
*:* AND NOT country:sweden
IF I'm not mistaken this should do a logical "AND" with all documents and the documents with a country that is different from "sweden".
197
Try with the following query in the search box:
NOT message:"warning"
message being the search field
43
If you love us? You can donate to us via Paypal or buy me a coffee so we can maintain and grow! Thank you!
Donate Us With
