MultiFieldQueryParser doesn't process search strings containing field
references correctly when BooleanClause.Occur.MUST_NOT is used
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Key: LUCENE-993
URL: https://issues.apache.org/jira/browse/LUCENE-993
Project: Lucene - Java
Issue Type: Bug
Components: QueryParser, Search
Affects Versions: 2.2
Reporter: Anthony Yeracaris
Below is a complete java program illustrating this bug.
In this program,I have an "allowed" field and a "restricted" field. The user
is not permitted to search the "restricted" field. However, if the user
provides the search string "allowed:value", then the MultiFieldQueryParser
returns "+allowed:valu -allowed:valu", which has the effect of finding nothing.
In the case the user provides a search string containing field references, I
would expect the parser to use the field and occur arrays as constraints. In
other words, if a the user mentions a field that has an occur of MUST_NOT, then
that field should be elided from the search. At the end of parsing, there must
be at least one search term, all MUST fields must have been mentioned.
import org.apache.lucene.queryParser.MultiFieldQueryParser;
import org.apache.lucene.queryParser.ParseException;
import org.apache.lucene.search.BooleanClause;
import org.apache.lucene.analysis.snowball.SnowballAnalyzer;
public class MultiFieldQueryParserBug {
public static void main(String[] argv) {
try
{
System.out.println(MultiFieldQueryParser.parse("allowed:value",
new String[]{"allowed", "restricted"},
new BooleanClause.Occur[]{BooleanClause.Occur.MUST,
BooleanClause.Occur.MUST_NOT},
new SnowballAnalyzer("English")));
// Output is:
// +allowed:valu -allowed:valu
}
catch (ParseException e)
{
e.printStackTrace(); // generated
}
}
}
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