public class TermsQuery 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 TermsQuery(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 |
---|
TermsQuery(List<Term> terms)
Creates a new
TermsQuery from the given list. |
TermsQuery(String field,
BytesRef... terms)
Creates a new
TermsQuery from the given BytesRef array for
a single field. |
TermsQuery(String field,
List<BytesRef> terms)
Creates a new
TermsQuery from the given BytesRef list for
a single field. |
TermsQuery(Term... terms)
Creates a new
TermsQuery from the given array. |
Modifier and Type | Method and Description |
---|---|
Weight |
createWeight(IndexSearcher searcher,
boolean needsScores)
Expert: Constructs an appropriate Weight implementation for this query.
|
boolean |
equals(Object obj) |
Collection<Accountable> |
getChildResources()
Returns nested resources of this class.
|
int |
hashCode() |
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. |
public TermsQuery(List<Term> terms)
TermsQuery
from the given list. The list
can contain duplicate terms and multiple fields.public TermsQuery(String field, List<BytesRef> terms)
TermsQuery
from the given BytesRef
list for
a single field.public TermsQuery(String field, BytesRef... terms)
TermsQuery
from the given BytesRef
array for
a single field.public TermsQuery(Term... terms)
TermsQuery
from the given array. The array can
contain duplicate terms and multiple fields.public Query rewrite(IndexReader reader) throws IOException
Query
rewrite
in class Query
IOException
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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