Note that ? and * cannot be the first character of the search The asterisk sign (*) is used for zero or more characters you’re Was it Pulp Fiction or Polp Fiction? You can replace that character with a Sometimes you don’t know the exact word you’re searchingįor. Pulp in the title will be return and everything with fiction will be omitted. Suppose you search +pulp –fiction all movies with Instead of + you can also use – if you don’t want a word toĪppear in the result list. Pulp Fiction and not Pulp Foo Fiction is found) you surround the two words with +fiction, this is also allowed in Lucene. If you want to search for pulp AND fiction you just enter (update: this is not true, Google uses AND search, thanks Alper) Result because the results are ordered by relevance. That’s right, you’dĮxpect pulp AND fiction, but it is OR. All the resultsįor movies that contain pulp OR fiction are returned. Suppose you want to search for Pulp Fiction. Probably want to search on a title of a movie. In our case the default field is title because you But there always is a default search field (which is In principle you should provide the field name of the field Very much like the advanced google syntax. With fieldname foobar and no other fields that’s perfectly legal (but a bit It is allowed to have multiple fields with the same name inĪ Document, there is no structure at all. Notation for sorting and searching on date ranges. Should remember that everything is a string. Lucene has the notion of dates and numbers, but for now you Genre of movie, there can be more than one genre Release date in the format YYYYMMDD (19991231)ĭirector of movie (“Quentin Tarantinoâ€, “Tony Scott†etc.) Title of movie (“Pulp Fictionâ€, “The Big Lebowski†etc.) I need some example data to make things more clear. Field name “title†and field data “Pulp Fiction†makes a field for example. (when I use the word document with a capital D I mean a Lucene Document) to So how is the data stored? Lucene uses a Lucene Document Get it from a slow medium like a floppy disk. Your data anymore this is great when you access your data via a web service or The index of Lucene is so smart that you don’t even need The index between systems (you can even transfer an index made in Windows to a This system makes it possible to transfer The index Lucene creates is stored in a couple of files Ordering and much more efficient that sorting on a name only. Lucene is smart enough to remember all kinds of Those cardsĪre ordered by name or company name so you can find the cards quicker than You can compare an index with the way you organize business cards. An index is some kind of trick to search trough your data more quickly. When you want to search things you probably have a largeĭataset (this can be a database, a bunch of files (word, excel, pdf, txt, csvĪnd all other files that can read by Java). That’s faster, easier to use and more reliable than Lucene. With libraries like Lucene it’s highly unlikely that you will create something After that I will start coding.Ī lot of developers tend to do everything themselves, but (still understandable for everybody, queries aren’t scary, it’s just another The first part isĪbout the possibilities that Lucene will give you, how you create queries Is, how to use it as an end-user and what it can do for you. Intended for developers, the first part of this article describes what Lucene This article handles the basics of Lucene and is not only This also means that it is highly unlikely to find a bugĪnd that it’s almost impossible to increase performance (Lucene is blazingly (Doug Cutting) started with Lucene in 1997 and still Lucene is a big player It’s veryĮasy to use (for both developers and users) and fast. Lucene is a text search engine written in Java.
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