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  Tutorial: Lucene QueryParser Rules

Lucene, including building and querying an index. You may want to take a look back at the Lucene Intro published in July on java.net. The focus here is on Lucene\'s QueryParser, providing an in-depth look at its capabilities and caveats. .

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Lucene, including building and querying an index. You may want to take a look back at the Lucene Intro published in July on java.net. The focus here is on Lucene\'s QueryParser, providing an in-depth look at its capabilities and caveats.

First we\'ll see what is involved to use QueryParser in an application. Then, Lucene\'s Query API is shown in relation to the corresponding QueryParser syntax. Elaboration on the details of QueryParser syntax is then followed by how QueryParser\'s features can be customized.

Using QueryParser
Using QueryParser is quite straightforward. Three things are needed: an expression, the default field name to use for unqualified fields in the expression, and an analyzer to pieces of the expression.

Field-selection qualifiers are discussed in the query syntax section. Analysis, specific to query parsing, is covered in the \"Analysis paralysis\" section. For a more detailed look at Lucene analyzers, refer to the Lucene Intro
Lucene\'s QueryParser, it is converted to a single concrete subclass of the Query class. In the previous article of this Lucene series, the discussion on searching glossed over the Query subclasses by simply using QueryParser to do the Right Thing. However, we need some understanding of the underlying concrete Query subclasses


 

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Lucene QueryParser Rules

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