Menu
Is it possible to search on date ranges using Lucene in Java? How do I build Lucene search queries based on date fields and dates ranges? For example:
[Edit] i'm using Lucene 2.4.1 and my system is really legacy and really poorly tested so i would like if possible not to have to upgrade
342
Lucene supports single and multiple character wildcard searches within single terms (not within phrase queries). To perform a single character wildcard search use the "?" symbol. To perform a multiple character wildcard search use the "*" symbol. You can also use the wildcard searches in the middle of a term.
Simply put, Lucene uses an “inverted indexing” of data – instead of mapping pages to keywords, it maps keywords to pages just like a glossary at the end of any book. This allows for faster search responses, as it searches through an index, instead of searching through text directly.
You can't search for special characters in Lucene Search. These are + - = && || > < ! ( ) { } [ ] ^ " ~ * ? : \ / @. You can search for special characters, with the exception of the @ character, in a field-level search as long as you escape them using \ before the special character.
Lucene (before version 2.9 anyway) only stores String values, and it only supports lexicographical range queries on that data. So if you want to store date/time data and performa range queries on it, you need to explicitly format your data/time values in such a way as to make them lexicographically ordered.
For example, store your date/times as something like 2009-10-29T15:34:00, and then do range queries like [2009-10-29T15:00:00 TO 2009-10-29T16:00:00]
As has been pointed out elsewhere, Lucene 2.9 finally introduced support for range queries against non-string data, making this all rather easier.
111
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
