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Feb 7, 2012, 6:11 AM
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[jira] [Commented] (LUCENE-1486) Wildcards, ORs etc inside Phrase queries
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[ https://issues.apache.org/jira/browse/LUCENE-1486?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13202409#comment-13202409 ]
Tomás Fernández Löbbe commented on LUCENE-1486:
-----------------------------------------------
Hi I'm working in this change to allow field queries. I noted that queries like:
name:"de*"
name:de*
fail due to the exception thrown in the "rewrite" method:
{code:java}
public Query rewrite(IndexReader reader) throws IOException {
// ArrayList spanClauses = new ArrayList();
if (contents instanceof TermQuery) {
return contents;
}
// Build a sequence of Span clauses arranged in a SpanNear - child
// clauses can be complex
// Booleans e.g. nots and ors etc
int numNegatives = 0;
if (!(contents instanceof BooleanQuery)) {
throw new IllegalArgumentException("Unknown query type \""
+ contents.getClass().getName()
+ "\" found in phrase query string \"" + phrasedQueryStringContents
+ "\"");
}
...
{code}
By changing it to something like:
{code:java}
if (!(contents instanceof BooleanQuery)) {
return contents;
}
{code}
queries like the one above work, together with all the other queries available in the unit test. Is there something I'm missing with the previous change? I know the ComplexPhraseQueryParser is not intended to be used for queries like the ones I'm proposing, but why does it needs to fail in those cases?
> Wildcards, ORs etc inside Phrase queries
> ----------------------------------------
>
> Key: LUCENE-1486
> URL: https://issues.apache.org/jira/browse/LUCENE-1486
> Project: Lucene - Java
> Issue Type: Improvement
> Components: core/queryparser
> Affects Versions: 2.4
> Reporter: Mark Harwood
> Priority: Minor
> Fix For: 4.0
>
> Attachments: ComplexPhraseQueryParser.java, LUCENE-1486.patch, LUCENE-1486.patch, LUCENE-1486.patch, LUCENE-1486.patch, LUCENE-1486.patch, Lucene-1486 non default field.patch, TestComplexPhraseQuery.java, junit_complex_phrase_qp_07_21_2009.patch, junit_complex_phrase_qp_07_22_2009.patch
>
>
> An extension to the default QueryParser that overrides the parsing of PhraseQueries to allow more complex syntax e.g. wildcards in phrase queries.
> The implementation feels a little hacky - this is arguably better handled in QueryParser itself. This works as a proof of concept for much of the query parser syntax. Examples from the Junit test include:
> checkMatches("\"j* smyth~\"", "1,2"); //wildcards and fuzzies are OK in phrases
> checkMatches("\"(jo* -john) smith\"", "2"); // boolean logic works
> checkMatches("\"jo* smith\"~2", "1,2,3"); // position logic works.
>
> checkBadQuery("\"jo* id:1 smith\""); //mixing fields in a phrase is bad
> checkBadQuery("\"jo* \"smith\" \""); //phrases inside phrases is bad
> checkBadQuery("\"jo* [sma TO smZ]\" \""); //range queries inside phrases not supported
> Code plus Junit test to follow...
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