public class TermInSetQuery extends Query implements Accountable
ConstantScoreQuery
over a BooleanQuery
containing only
BooleanClause.Occur.SHOULD
clauses.
For instance in the following example, both @{code q1} and q2
would yield the same scores:
Query q1 = new TermInSetQuery(new Term("field", "foo"), new Term("field", "bar")); BooleanQuery bq = new BooleanQuery(); bq.add(new TermQuery(new Term("field", "foo")), Occur.SHOULD); bq.add(new TermQuery(new Term("field", "bar")), Occur.SHOULD); Query q2 = new ConstantScoreQuery(bq);
When there are few terms, this query executes like a regular disjunction.
However, when there are many terms, instead of merging iterators on the fly,
it will populate a bit set with matching docs and return a Scorer
over this bit set.
NOTE: This query produces scores that are equal to its boost
Constructor and Description |
---|
TermInSetQuery(String field,
BytesRef... terms)
Creates a new
TermInSetQuery from the given array of terms. |
TermInSetQuery(String field,
Collection<BytesRef> terms)
Creates a new
TermInSetQuery from the given collection of terms. |
Modifier and Type | Method and Description |
---|---|
Weight |
createWeight(IndexSearcher searcher,
boolean needsScores)
Expert: Constructs an appropriate Weight implementation for this query.
|
boolean |
equals(Object other)
Override and implement query instance equivalence properly in a subclass.
|
Collection<Accountable> |
getChildResources()
Returns nested resources of this class.
|
PrefixCodedTerms |
getTermData()
Returns the terms wrapped in a PrefixCodedTerms.
|
int |
hashCode()
Override and implement query hash code properly in a subclass.
|
long |
ramBytesUsed()
Return the memory usage of this object in bytes.
|
Query |
rewrite(IndexReader reader)
Expert: called to re-write queries into primitive queries.
|
String |
toString(String defaultField)
Prints a query to a string, with
field assumed to be the
default field and omitted. |
classHash, sameClassAs, toString
public TermInSetQuery(String field, Collection<BytesRef> terms)
TermInSetQuery
from the given collection of terms.public TermInSetQuery(String field, BytesRef... terms)
TermInSetQuery
from the given array of terms.public Query rewrite(IndexReader reader) throws IOException
Query
rewrite
in class Query
IOException
public boolean equals(Object other)
Query
QueryCache
works properly.
Typically a query will be equal to another only if it's an instance of
the same class and its document-filtering properties are identical that other
instance. Utility methods are provided for certain repetitive code.equals
in class Query
Query.sameClassAs(Object)
,
Query.classHash()
public int hashCode()
Query
QueryCache
works properly.hashCode
in class Query
Query.equals(Object)
public PrefixCodedTerms getTermData()
public String toString(String defaultField)
Query
field
assumed to be the
default field and omitted.public long ramBytesUsed()
Accountable
ramBytesUsed
in interface Accountable
public Collection<Accountable> getChildResources()
Accountable
getChildResources
in interface Accountable
Accountables
public Weight createWeight(IndexSearcher searcher, boolean needsScores) throws IOException
Query
Only implemented by primitive queries, which re-write to themselves.
createWeight
in class Query
needsScores
- True if document scores (Scorer.score()
) or match
frequencies (Scorer.freq()
) are needed.IOException
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