Add QueryParser.newFieldQuery
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Key: LUCENE-2892
URL: https://issues.apache.org/jira/browse/LUCENE-2892
Project: Lucene - Java
Issue Type: Improvement
Components: QueryParser
Reporter: Robert Muir
Attachments: LUCENE-2892.patch
Note: this patch changes no behavior, just makes QP more subclassable.
Currently we have Query getFieldQuery(String field, String queryText, boolean
quoted)
This contains very hairy methods for producing a query from QP's analyzer.
I propose we factor this into newFieldQuery(Analyzer analyzer, String field,
String queryText, boolean quoted)
Then getFieldQuery just calls newFieldQuery(this.analyzer, field, queryText,
quoted);
The reasoning is: it can be quite useful to consider the double quote as more
than phrases, but a "more exact" search.
In the case the user quoted the terms, you might want to analyze the text with
an alternate analyzer that:
doesn't produce synonyms, doesnt decompose compounds, doesn't use
WordDelimiterFilter
(you would need to be using preserveOriginal=true at index time for the WDF
one), etc etc.
This is similar to the way google's double quote operator works, its not
defined as phrase but "this exact wording or phrase".
For example compare results to a query of tests versus "tests".
Currently you can do this without heavy code duplication, but really only if
you make a separate field (which is wasteful),
and make your custom QP lie about its field... in the examples I listed above
you can do this with a single field, yet still
have a more exact phrase search.
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