Improve issue search (#2387)

* Improve issue indexer

* Fix new issue sqlite bug

* Different test indexer paths for each db

* Add integration indexer paths to make clean

vendor/github.com/blevesearch/bleve/search/query/bool_field.go

@@ -22,7 +22,7 @@ import (
 )
 
 type BoolFieldQuery struct {
-	Bool  bool   `json:"bool"`
+	Bool     bool   `json:"bool"`
 	FieldVal string `json:"field,omitempty"`
 	BoostVal *Boost `json:"boost,omitempty"`
 }
@@ -39,20 +39,19 @@ func (q *BoolFieldQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *BoolFieldQuery) Boost() float64{
-		return q.BoostVal.Value()
+func (q *BoolFieldQuery) Boost() float64 {
+	return q.BoostVal.Value()
 }
 
 func (q *BoolFieldQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *BoolFieldQuery) Field() string{
+func (q *BoolFieldQuery) Field() string {
 	return q.FieldVal
 }
 
-
-func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -61,5 +60,5 @@ func (q *BoolFieldQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, e
 	if q.Bool {
 		term = "T"
 	}
-	return searcher.NewTermSearcher(i, term, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermSearcher(i, term, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/boolean.go

@@ -25,10 +25,11 @@ import (
 )
 
 type BooleanQuery struct {
-	Must     Query  `json:"must,omitempty"`
-	Should   Query  `json:"should,omitempty"`
-	MustNot  Query  `json:"must_not,omitempty"`
-	BoostVal *Boost `json:"boost,omitempty"`
+	Must            Query  `json:"must,omitempty"`
+	Should          Query  `json:"should,omitempty"`
+	MustNot         Query  `json:"must_not,omitempty"`
+	BoostVal        *Boost `json:"boost,omitempty"`
+	queryStringMode bool
 }
 
 // NewBooleanQuery creates a compound Query composed
@@ -55,6 +56,15 @@ func NewBooleanQuery(must []Query, should []Query, mustNot []Query) *BooleanQuer
 	return &rv
 }
 
+func NewBooleanQueryForQueryString(must []Query, should []Query, mustNot []Query) *BooleanQuery {
+	rv := NewBooleanQuery(nil, nil, nil)
+	rv.queryStringMode = true
+	rv.AddMust(must...)
+	rv.AddShould(should...)
+	rv.AddMustNot(mustNot...)
+	return rv
+}
+
 // SetMinShould requires that at least minShould of the
 // should Queries must be satisfied.
 func (q *BooleanQuery) SetMinShould(minShould float64) {
@@ -63,7 +73,9 @@ func (q *BooleanQuery) SetMinShould(minShould float64) {
 
 func (q *BooleanQuery) AddMust(m ...Query) {
 	if q.Must == nil {
-		q.Must = NewConjunctionQuery([]Query{})
+		tmp := NewConjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.Must = tmp
 	}
 	for _, mq := range m {
 		q.Must.(*ConjunctionQuery).AddQuery(mq)
@@ -72,7 +84,9 @@ func (q *BooleanQuery) AddMust(m ...Query) {
 
 func (q *BooleanQuery) AddShould(m ...Query) {
 	if q.Should == nil {
-		q.Should = NewDisjunctionQuery([]Query{})
+		tmp := NewDisjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.Should = tmp
 	}
 	for _, mq := range m {
 		q.Should.(*DisjunctionQuery).AddQuery(mq)
@@ -81,7 +95,9 @@ func (q *BooleanQuery) AddShould(m ...Query) {
 
 func (q *BooleanQuery) AddMustNot(m ...Query) {
 	if q.MustNot == nil {
-		q.MustNot = NewDisjunctionQuery([]Query{})
+		tmp := NewDisjunctionQuery([]Query{})
+		tmp.queryStringMode = q.queryStringMode
+		q.MustNot = tmp
 	}
 	for _, mq := range m {
 		q.MustNot.(*DisjunctionQuery).AddQuery(mq)
@@ -93,44 +109,67 @@ func (q *BooleanQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *BooleanQuery) Boost() float64{
+func (q *BooleanQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *BooleanQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *BooleanQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	var err error
 	var mustNotSearcher search.Searcher
 	if q.MustNot != nil {
-		mustNotSearcher, err = q.MustNot.Searcher(i, m, explain)
+		mustNotSearcher, err = q.MustNot.Searcher(i, m, options)
 		if err != nil {
 			return nil, err
 		}
-		if q.Must == nil && q.Should == nil {
-			q.Must = NewMatchAllQuery()
+		// if must not is MatchNone, reset it to nil
+		if _, ok := mustNotSearcher.(*searcher.MatchNoneSearcher); ok {
+			mustNotSearcher = nil
 		}
 	}
 
 	var mustSearcher search.Searcher
 	if q.Must != nil {
-		mustSearcher, err = q.Must.Searcher(i, m, explain)
+		mustSearcher, err = q.Must.Searcher(i, m, options)
 		if err != nil {
 			return nil, err
 		}
+		// if must searcher is MatchNone, reset it to nil
+		if _, ok := mustSearcher.(*searcher.MatchNoneSearcher); ok {
+			mustSearcher = nil
+		}
 	}
 
 	var shouldSearcher search.Searcher
 	if q.Should != nil {
-		shouldSearcher, err = q.Should.Searcher(i, m, explain)
+		shouldSearcher, err = q.Should.Searcher(i, m, options)
+		if err != nil {
+			return nil, err
+		}
+		// if should searcher is MatchNone, reset it to nil
+		if _, ok := shouldSearcher.(*searcher.MatchNoneSearcher); ok {
+			shouldSearcher = nil
+		}
+	}
+
+	// if all 3 are nil, return MatchNone
+	if mustSearcher == nil && shouldSearcher == nil && mustNotSearcher == nil {
+		return searcher.NewMatchNoneSearcher(i)
+	}
+
+	// if only mustNotSearcher, start with MatchAll
+	if mustSearcher == nil && shouldSearcher == nil && mustNotSearcher != nil {
+		mustSearcher, err = searcher.NewMatchAllSearcher(i, 1.0, options)
 		if err != nil {
 			return nil, err
 		}
 	}
 
+	// optimization, if only should searcher, just return it instead
 	if mustSearcher == nil && shouldSearcher != nil && mustNotSearcher == nil {
 		return shouldSearcher, nil
 	}
 
-	return searcher.NewBooleanSearcher(i, mustSearcher, shouldSearcher, mustNotSearcher, explain)
+	return searcher.NewBooleanSearcher(i, mustSearcher, shouldSearcher, mustNotSearcher, options)
 }
 
 func (q *BooleanQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/conjunction.go

@@ -24,8 +24,9 @@ import (
 )
 
 type ConjunctionQuery struct {
-	Conjuncts []Query `json:"conjuncts"`
-	BoostVal  *Boost  `json:"boost,omitempty"`
+	Conjuncts       []Query `json:"conjuncts"`
+	BoostVal        *Boost  `json:"boost,omitempty"`
+	queryStringMode bool
 }
 
 // NewConjunctionQuery creates a new compound Query.
@@ -41,7 +42,7 @@ func (q *ConjunctionQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *ConjunctionQuery) Boost() float64{
+func (q *ConjunctionQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -51,11 +52,10 @@ func (q *ConjunctionQuery) AddQuery(aq ...Query) {
 	}
 }
 
-func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	ss := make([]search.Searcher, len(q.Conjuncts))
-	for in, conjunct := range q.Conjuncts {
-		var err error
-		ss[in], err = conjunct.Searcher(i, m, explain)
+func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	ss := make([]search.Searcher, 0, len(q.Conjuncts))
+	for _, conjunct := range q.Conjuncts {
+		sr, err := conjunct.Searcher(i, m, options)
 		if err != nil {
 			for _, searcher := range ss {
 				if searcher != nil {
@@ -64,8 +64,16 @@ func (q *ConjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 			}
 			return nil, err
 		}
+		if _, ok := sr.(*searcher.MatchNoneSearcher); ok && q.queryStringMode {
+			// in query string mode, skip match none
+			continue
+		}
+		ss = append(ss, sr)
 	}
-	return searcher.NewConjunctionSearcher(i, ss, explain)
+	if len(ss) < 1 {
+		return searcher.NewMatchNoneSearcher(i)
+	}
+	return searcher.NewConjunctionSearcher(i, ss, options)
 }
 
 func (q *ConjunctionQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/date_range.go

@@ -113,20 +113,19 @@ func (q *DateRangeQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DateRangeQuery) Boost() float64{
+func (q *DateRangeQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
 func (q *DateRangeQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *DateRangeQuery) Field() string{
+func (q *DateRangeQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	min, max, err := q.parseEndpoints()
 	if err != nil {
 		return nil, err
@@ -137,7 +136,7 @@ func (q *DateRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, e
 		field = m.DefaultSearchField()
 	}
 
-	return searcher.NewNumericRangeSearcher(i, min, max, q.InclusiveStart, q.InclusiveEnd, field, q.BoostVal.Value(), explain)
+	return searcher.NewNumericRangeSearcher(i, min, max, q.InclusiveStart, q.InclusiveEnd, field, q.BoostVal.Value(), options)
 }
 
 func (q *DateRangeQuery) parseEndpoints() (*float64, *float64, error) {

vendor/github.com/blevesearch/bleve/search/query/disjunction.go

@@ -25,9 +25,10 @@ import (
 )
 
 type DisjunctionQuery struct {
-	Disjuncts []Query `json:"disjuncts"`
-	BoostVal  *Boost  `json:"boost,omitempty"`
-	Min       float64 `json:"min"`
+	Disjuncts       []Query `json:"disjuncts"`
+	BoostVal        *Boost  `json:"boost,omitempty"`
+	Min             float64 `json:"min"`
+	queryStringMode bool
 }
 
 // NewDisjunctionQuery creates a new compound Query.
@@ -43,11 +44,10 @@ func (q *DisjunctionQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DisjunctionQuery) Boost() float64{
+func (q *DisjunctionQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
 func (q *DisjunctionQuery) AddQuery(aq ...Query) {
 	for _, aaq := range aq {
 		q.Disjuncts = append(q.Disjuncts, aaq)
@@ -58,11 +58,10 @@ func (q *DisjunctionQuery) SetMin(m float64) {
 	q.Min = m
 }
 
-func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	ss := make([]search.Searcher, len(q.Disjuncts))
-	for in, disjunct := range q.Disjuncts {
-		var err error
-		ss[in], err = disjunct.Searcher(i, m, explain)
+func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	ss := make([]search.Searcher, 0, len(q.Disjuncts))
+	for _, disjunct := range q.Disjuncts {
+		sr, err := disjunct.Searcher(i, m, options)
 		if err != nil {
 			for _, searcher := range ss {
 				if searcher != nil {
@@ -71,8 +70,16 @@ func (q *DisjunctionQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 			}
 			return nil, err
 		}
+		if _, ok := sr.(*searcher.MatchNoneSearcher); ok && q.queryStringMode {
+			// in query string mode, skip match none
+			continue
+		}
+		ss = append(ss, sr)
 	}
-	return searcher.NewDisjunctionSearcher(i, ss, q.Min, explain)
+	if len(ss) < 1 {
+		return searcher.NewMatchNoneSearcher(i)
+	}
+	return searcher.NewDisjunctionSearcher(i, ss, q.Min, options)
 }
 
 func (q *DisjunctionQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/docid.go

@@ -40,10 +40,10 @@ func (q *DocIDQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *DocIDQuery) Boost() float64{
+func (q *DocIDQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *DocIDQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	return searcher.NewDocIDSearcher(i, q.IDs, q.BoostVal.Value(), explain)
+func (q *DocIDQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewDocIDSearcher(i, q.IDs, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/fuzzy.go

@@ -48,7 +48,7 @@ func (q *FuzzyQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *FuzzyQuery) Boost() float64{
+func (q *FuzzyQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -56,7 +56,7 @@ func (q *FuzzyQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *FuzzyQuery) Field() string{
+func (q *FuzzyQuery) Field() string {
 	return q.FieldVal
 }
 
@@ -68,10 +68,10 @@ func (q *FuzzyQuery) SetPrefix(p int) {
 	q.Prefix = p
 }
 
-func (q *FuzzyQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *FuzzyQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewFuzzySearcher(i, q.Term, q.Prefix, q.Fuzziness, field, q.BoostVal.Value(), explain)
+	return searcher.NewFuzzySearcher(i, q.Term, q.Prefix, q.Fuzziness, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/geo_boundingbox.go

@@ -0,0 +1,113 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type GeoBoundingBoxQuery struct {
+	TopLeft     []float64 `json:"top_left,omitempty"`
+	BottomRight []float64 `json:"bottom_right,omitempty"`
+	FieldVal    string    `json:"field,omitempty"`
+	BoostVal    *Boost    `json:"boost,omitempty"`
+}
+
+func NewGeoBoundingBoxQuery(topLeftLon, topLeftLat, bottomRightLon, bottomRightLat float64) *GeoBoundingBoxQuery {
+	return &GeoBoundingBoxQuery{
+		TopLeft:     []float64{topLeftLon, topLeftLat},
+		BottomRight: []float64{bottomRightLon, bottomRightLat},
+	}
+}
+
+func (q *GeoBoundingBoxQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *GeoBoundingBoxQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *GeoBoundingBoxQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *GeoBoundingBoxQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *GeoBoundingBoxQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+
+	if q.BottomRight[0] < q.TopLeft[0] {
+		// cross date line, rewrite as two parts
+
+		leftSearcher, err := searcher.NewGeoBoundingBoxSearcher(i, -180, q.BottomRight[1], q.BottomRight[0], q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+		if err != nil {
+			return nil, err
+		}
+		rightSearcher, err := searcher.NewGeoBoundingBoxSearcher(i, q.TopLeft[0], q.BottomRight[1], 180, q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+		if err != nil {
+			_ = leftSearcher.Close()
+			return nil, err
+		}
+
+		return searcher.NewDisjunctionSearcher(i, []search.Searcher{leftSearcher, rightSearcher}, 0, options)
+	}
+
+	return searcher.NewGeoBoundingBoxSearcher(i, q.TopLeft[0], q.BottomRight[1], q.BottomRight[0], q.TopLeft[1], field, q.BoostVal.Value(), options, true)
+}
+
+func (q *GeoBoundingBoxQuery) Validate() error {
+	return nil
+}
+
+func (q *GeoBoundingBoxQuery) UnmarshalJSON(data []byte) error {
+	tmp := struct {
+		TopLeft     interface{} `json:"top_left,omitempty"`
+		BottomRight interface{} `json:"bottom_right,omitempty"`
+		FieldVal    string      `json:"field,omitempty"`
+		BoostVal    *Boost      `json:"boost,omitempty"`
+	}{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	// now use our generic point parsing code from the geo package
+	lon, lat, found := geo.ExtractGeoPoint(tmp.TopLeft)
+	if !found {
+		return fmt.Errorf("geo location top_left not in a valid format")
+	}
+	q.TopLeft = []float64{lon, lat}
+	lon, lat, found = geo.ExtractGeoPoint(tmp.BottomRight)
+	if !found {
+		return fmt.Errorf("geo location bottom_right not in a valid format")
+	}
+	q.BottomRight = []float64{lon, lat}
+	q.FieldVal = tmp.FieldVal
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/geo_distance.go

@@ -0,0 +1,100 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type GeoDistanceQuery struct {
+	Location []float64 `json:"location,omitempty"`
+	Distance string    `json:"distance,omitempty"`
+	FieldVal string    `json:"field,omitempty"`
+	BoostVal *Boost    `json:"boost,omitempty"`
+}
+
+func NewGeoDistanceQuery(lon, lat float64, distance string) *GeoDistanceQuery {
+	return &GeoDistanceQuery{
+		Location: []float64{lon, lat},
+		Distance: distance,
+	}
+}
+
+func (q *GeoDistanceQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *GeoDistanceQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *GeoDistanceQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *GeoDistanceQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *GeoDistanceQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
+	options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+
+	dist, err := geo.ParseDistance(q.Distance)
+	if err != nil {
+		return nil, err
+	}
+
+	return searcher.NewGeoPointDistanceSearcher(i, q.Location[0], q.Location[1],
+		dist, field, q.BoostVal.Value(), options)
+}
+
+func (q *GeoDistanceQuery) Validate() error {
+	return nil
+}
+
+func (q *GeoDistanceQuery) UnmarshalJSON(data []byte) error {
+	tmp := struct {
+		Location interface{} `json:"location,omitempty"`
+		Distance string      `json:"distance,omitempty"`
+		FieldVal string      `json:"field,omitempty"`
+		BoostVal *Boost      `json:"boost,omitempty"`
+	}{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	// now use our generic point parsing code from the geo package
+	lon, lat, found := geo.ExtractGeoPoint(tmp.Location)
+	if !found {
+		return fmt.Errorf("geo location not in a valid format")
+	}
+	q.Location = []float64{lon, lat}
+	q.Distance = tmp.Distance
+	q.FieldVal = tmp.FieldVal
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/match.go

@@ -90,7 +90,7 @@ func (q *MatchQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchQuery) Boost() float64{
+func (q *MatchQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -98,7 +98,7 @@ func (q *MatchQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *MatchQuery) Field() string{
+func (q *MatchQuery) Field() string {
 	return q.FieldVal
 }
 
@@ -114,7 +114,7 @@ func (q *MatchQuery) SetOperator(operator MatchQueryOperator) {
 	q.Operator = operator
 }
 
-func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 
 	field := q.FieldVal
 	if q.FieldVal == "" {
@@ -160,17 +160,17 @@ func (q *MatchQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, expla
 			shouldQuery := NewDisjunctionQuery(tqs)
 			shouldQuery.SetMin(1)
 			shouldQuery.SetBoost(q.BoostVal.Value())
-			return shouldQuery.Searcher(i, m, explain)
+			return shouldQuery.Searcher(i, m, options)
 
 		case MatchQueryOperatorAnd:
 			mustQuery := NewConjunctionQuery(tqs)
 			mustQuery.SetBoost(q.BoostVal.Value())
-			return mustQuery.Searcher(i, m, explain)
+			return mustQuery.Searcher(i, m, options)
 
 		default:
 			return nil, fmt.Errorf("unhandled operator %d", q.Operator)
 		}
 	}
 	noneQuery := NewMatchNoneQuery()
-	return noneQuery.Searcher(i, m, explain)
+	return noneQuery.Searcher(i, m, options)
 }

vendor/github.com/blevesearch/bleve/search/query/match_all.go

@@ -38,14 +38,12 @@ func (q *MatchAllQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchAllQuery) Boost() float64{
+func (q *MatchAllQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-
-
-func (q *MatchAllQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-	return searcher.NewMatchAllSearcher(i, q.BoostVal.Value(), explain)
+func (q *MatchAllQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewMatchAllSearcher(i, q.BoostVal.Value(), options)
 }
 
 func (q *MatchAllQuery) MarshalJSON() ([]byte, error) {

vendor/github.com/blevesearch/bleve/search/query/match_none.go

@@ -38,11 +38,11 @@ func (q *MatchNoneQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchNoneQuery) Boost() float64{
+func (q *MatchNoneQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *MatchNoneQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchNoneQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	return searcher.NewMatchNoneSearcher(i)
 }
 

vendor/github.com/blevesearch/bleve/search/query/match_phrase.go

@@ -49,7 +49,7 @@ func (q *MatchPhraseQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *MatchPhraseQuery) Boost() float64{
+func (q *MatchPhraseQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -57,11 +57,11 @@ func (q *MatchPhraseQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *MatchPhraseQuery) Field() string{
+func (q *MatchPhraseQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -81,15 +81,15 @@ func (q *MatchPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping,
 	tokens := analyzer.Analyze([]byte(q.MatchPhrase))
 	if len(tokens) > 0 {
 		phrase := tokenStreamToPhrase(tokens)
-		phraseQuery := NewPhraseQuery(phrase, field)
+		phraseQuery := NewMultiPhraseQuery(phrase, field)
 		phraseQuery.SetBoost(q.BoostVal.Value())
-		return phraseQuery.Searcher(i, m, explain)
+		return phraseQuery.Searcher(i, m, options)
 	}
 	noneQuery := NewMatchNoneQuery()
-	return noneQuery.Searcher(i, m, explain)
+	return noneQuery.Searcher(i, m, options)
 }
 
-func tokenStreamToPhrase(tokens analysis.TokenStream) []string {
+func tokenStreamToPhrase(tokens analysis.TokenStream) [][]string {
 	firstPosition := int(^uint(0) >> 1)
 	lastPosition := 0
 	for _, token := range tokens {
@@ -102,13 +102,10 @@ func tokenStreamToPhrase(tokens analysis.TokenStream) []string {
 	}
 	phraseLen := lastPosition - firstPosition + 1
 	if phraseLen > 0 {
-		rv := make([]string, phraseLen)
-		for i := 0; i < phraseLen; i++ {
-			rv[i] = ""
-		}
+		rv := make([][]string, phraseLen)
 		for _, token := range tokens {
 			pos := token.Position - firstPosition
-			rv[pos] = string(token.Term)
+			rv[pos] = append(rv[pos], string(token.Term))
 		}
 		return rv
 	}

vendor/github.com/blevesearch/bleve/search/query/multi_phrase.go

@@ -0,0 +1,80 @@
+//  Copyright (c) 2014 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"encoding/json"
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type MultiPhraseQuery struct {
+	Terms    [][]string `json:"terms"`
+	Field    string     `json:"field,omitempty"`
+	BoostVal *Boost     `json:"boost,omitempty"`
+}
+
+// NewMultiPhraseQuery creates a new Query for finding
+// term phrases in the index.
+// It is like PhraseQuery, but each position in the
+// phrase may be satisfied by a list of terms
+// as opposed to just one.
+// At least one of the terms must exist in the correct
+// order, at the correct index offsets, in the
+// specified field. Queried field must have been indexed with
+// IncludeTermVectors set to true.
+func NewMultiPhraseQuery(terms [][]string, field string) *MultiPhraseQuery {
+	return &MultiPhraseQuery{
+		Terms: terms,
+		Field: field,
+	}
+}
+
+func (q *MultiPhraseQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *MultiPhraseQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *MultiPhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewMultiPhraseSearcher(i, q.Terms, q.Field, options)
+}
+
+func (q *MultiPhraseQuery) Validate() error {
+	if len(q.Terms) < 1 {
+		return fmt.Errorf("phrase query must contain at least one term")
+	}
+	return nil
+}
+
+func (q *MultiPhraseQuery) UnmarshalJSON(data []byte) error {
+	type _mphraseQuery MultiPhraseQuery
+	tmp := _mphraseQuery{}
+	err := json.Unmarshal(data, &tmp)
+	if err != nil {
+		return err
+	}
+	q.Terms = tmp.Terms
+	q.Field = tmp.Field
+	q.BoostVal = tmp.BoostVal
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/numeric_range.go

@@ -59,7 +59,7 @@ func (q *NumericRangeQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *NumericRangeQuery) Boost() float64{
+func (q *NumericRangeQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -67,16 +67,16 @@ func (q *NumericRangeQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *NumericRangeQuery) Field() string{
+func (q *NumericRangeQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *NumericRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *NumericRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewNumericRangeSearcher(i, q.Min, q.Max, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), explain)
+	return searcher.NewNumericRangeSearcher(i, q.Min, q.Max, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), options)
 }
 
 func (q *NumericRangeQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/phrase.go

@@ -25,10 +25,9 @@ import (
 )
 
 type PhraseQuery struct {
-	Terms       []string `json:"terms"`
-	Field       string   `json:"field,omitempty"`
-	BoostVal    *Boost   `json:"boost,omitempty"`
-	termQueries []Query
+	Terms    []string `json:"terms"`
+	Field    string   `json:"field,omitempty"`
+	BoostVal *Boost   `json:"boost,omitempty"`
 }
 
 // NewPhraseQuery creates a new Query for finding
@@ -38,18 +37,9 @@ type PhraseQuery struct {
 // specified field. Queried field must have been indexed with
 // IncludeTermVectors set to true.
 func NewPhraseQuery(terms []string, field string) *PhraseQuery {
-	termQueries := make([]Query, 0)
-	for _, term := range terms {
-		if term != "" {
-			tq := NewTermQuery(term)
-			tq.SetField(field)
-			termQueries = append(termQueries, tq)
-		}
-	}
 	return &PhraseQuery{
-		Terms:       terms,
-		Field:       field,
-		termQueries: termQueries,
+		Terms: terms,
+		Field: field,
 	}
 }
 
@@ -58,22 +48,16 @@ func (q *PhraseQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *PhraseQuery) Boost() float64{
+func (q *PhraseQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
-
-	conjunctionQuery := NewConjunctionQuery(q.termQueries)
-	conjunctionSearcher, err := conjunctionQuery.Searcher(i, m, explain)
-	if err != nil {
-		return nil, err
-	}
-	return searcher.NewPhraseSearcher(i, conjunctionSearcher.(*searcher.ConjunctionSearcher), q.Terms)
+func (q *PhraseQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	return searcher.NewPhraseSearcher(i, q.Terms, q.Field, options)
 }
 
 func (q *PhraseQuery) Validate() error {
-	if len(q.termQueries) < 1 {
+	if len(q.Terms) < 1 {
 		return fmt.Errorf("phrase query must contain at least one term")
 	}
 	return nil
@@ -89,9 +73,5 @@ func (q *PhraseQuery) UnmarshalJSON(data []byte) error {
 	q.Terms = tmp.Terms
 	q.Field = tmp.Field
 	q.BoostVal = tmp.BoostVal
-	q.termQueries = make([]Query, len(q.Terms))
-	for i, term := range q.Terms {
-		q.termQueries[i] = &TermQuery{Term: term, FieldVal: q.Field, BoostVal: q.BoostVal}
-	}
 	return nil
 }

vendor/github.com/blevesearch/bleve/search/query/prefix.go

@@ -41,7 +41,7 @@ func (q *PrefixQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *PrefixQuery) Boost() float64{
+func (q *PrefixQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -49,14 +49,14 @@ func (q *PrefixQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *PrefixQuery) Field() string{
+func (q *PrefixQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *PrefixQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *PrefixQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewTermPrefixSearcher(i, q.Prefix, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermPrefixSearcher(i, q.Prefix, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/query.go

@@ -36,7 +36,8 @@ func SetLog(l *log.Logger) {
 // A Query represents a description of the type
 // and parameters for a query into the index.
 type Query interface {
-	Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error)
+	Searcher(i index.IndexReader, m mapping.IndexMapping,
+		options search.SearcherOptions) (search.Searcher, error)
 }
 
 // A BoostableQuery represents a Query which can be boosted
@@ -122,7 +123,13 @@ func ParseQuery(input []byte) (Query, error) {
 		var rv PhraseQuery
 		err := json.Unmarshal(input, &rv)
 		if err != nil {
-			return nil, err
+			// now try multi-phrase
+			var rv2 MultiPhraseQuery
+			err = json.Unmarshal(input, &rv2)
+			if err != nil {
+				return nil, err
+			}
+			return &rv2, nil
 		}
 		return &rv, nil
 	}
@@ -154,8 +161,8 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
-	_, hasMin := tmp["min"]
-	_, hasMax := tmp["max"]
+	_, hasMin := tmp["min"].(float64)
+	_, hasMax := tmp["max"].(float64)
 	if hasMin || hasMax {
 		var rv NumericRangeQuery
 		err := json.Unmarshal(input, &rv)
@@ -164,6 +171,16 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
+	_, hasMinStr := tmp["min"].(string)
+	_, hasMaxStr := tmp["max"].(string)
+	if hasMinStr || hasMaxStr {
+		var rv TermRangeQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
 	_, hasStart := tmp["start"]
 	_, hasEnd := tmp["end"]
 	if hasStart || hasEnd {
@@ -237,6 +254,25 @@ func ParseQuery(input []byte) (Query, error) {
 		}
 		return &rv, nil
 	}
+	_, hasTopLeft := tmp["top_left"]
+	_, hasBottomRight := tmp["bottom_right"]
+	if hasTopLeft && hasBottomRight {
+		var rv GeoBoundingBoxQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
+	_, hasDistance := tmp["distance"]
+	if hasDistance {
+		var rv GeoDistanceQuery
+		err := json.Unmarshal(input, &rv)
+		if err != nil {
+			return nil, err
+		}
+		return &rv, nil
+	}
 	return nil, fmt.Errorf("unknown query type")
 }
 
@@ -300,14 +336,6 @@ func expandQuery(m mapping.IndexMapping, query Query) (Query, error) {
 				return nil, err
 			}
 			return &q, nil
-		case *PhraseQuery:
-			q := *query.(*PhraseQuery)
-			children, err := expandSlice(q.termQueries)
-			if err != nil {
-				return nil, err
-			}
-			q.termQueries = children
-			return &q, nil
 		default:
 			return query, nil
 		}

vendor/github.com/blevesearch/bleve/search/query/query_string.go

@@ -39,16 +39,20 @@ func (q *QueryStringQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *QueryStringQuery) Boost() float64{
+func (q *QueryStringQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
-func (q *QueryStringQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *QueryStringQuery) Parse() (Query, error) {
+	return parseQuerySyntax(q.Query)
+}
+
+func (q *QueryStringQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	newQuery, err := parseQuerySyntax(q.Query)
 	if err != nil {
 		return nil, err
 	}
-	return newQuery.Searcher(i, m, explain)
+	return newQuery.Searcher(i, m, options)
 }
 
 func (q *QueryStringQuery) Validate() error {

vendor/github.com/blevesearch/bleve/search/query/query_string.y

@@ -27,6 +27,7 @@ tEQUAL tTILDE
 %type <s>                tSTRING
 %type <s>                tPHRASE
 %type <s>                tNUMBER
+%type <s>                posOrNegNumber
 %type <s>                tTILDE
 %type <s>                tBOOST
 %type <q>                searchBase
@@ -127,7 +128,15 @@ tSTRING tCOLON tSTRING tTILDE {
 tNUMBER {
 	str := $1
 	logDebugGrammar("STRING - %s", str)
-	q := NewMatchQuery(str)
+	q1 := NewMatchQuery(str)
+	val, err := strconv.ParseFloat($1, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
+	inclusive := true
+	q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+	q := NewDisjunctionQuery([]Query{q1,q2})
+	q.queryStringMode = true
 	$$ = q
 }
 |
@@ -154,12 +163,21 @@ tSTRING tCOLON tSTRING {
 	$$ = q
 }
 |
-tSTRING tCOLON tNUMBER {
+tSTRING tCOLON posOrNegNumber {
 	field := $1
 	str := $3
 	logDebugGrammar("FIELD - %s STRING - %s", field, str)
-	q := NewMatchQuery(str)
-	q.SetField(field)
+	q1 := NewMatchQuery(str)
+	q1.SetField(field)
+	val, err := strconv.ParseFloat($3, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
+	inclusive := true
+	q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+	q2.SetField(field)
+	q := NewDisjunctionQuery([]Query{q1,q2})
+	q.queryStringMode = true
 	$$ = q
 }
 |
@@ -172,9 +190,12 @@ tSTRING tCOLON tPHRASE {
 	$$ = q
 }
 |
-tSTRING tCOLON tGREATER tNUMBER {
+tSTRING tCOLON tGREATER posOrNegNumber {
 	field := $1
-	min, _ := strconv.ParseFloat($4, 64)
+	min, err := strconv.ParseFloat($4, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	minInclusive := false
 	logDebugGrammar("FIELD - GREATER THAN %f", min)
 	q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -182,9 +203,12 @@ tSTRING tCOLON tGREATER tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tGREATER tEQUAL tNUMBER {
+tSTRING tCOLON tGREATER tEQUAL posOrNegNumber {
 	field := $1
-	min, _ := strconv.ParseFloat($5, 64)
+	min, err := strconv.ParseFloat($5, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	minInclusive := true
 	logDebugGrammar("FIELD - GREATER THAN OR EQUAL %f", min)
 	q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -192,9 +216,12 @@ tSTRING tCOLON tGREATER tEQUAL tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tLESS tNUMBER {
+tSTRING tCOLON tLESS posOrNegNumber {
 	field := $1
-	max, _ := strconv.ParseFloat($4, 64)
+	max, err := strconv.ParseFloat($4, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	maxInclusive := false
 	logDebugGrammar("FIELD - LESS THAN %f", max)
 	q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -202,9 +229,12 @@ tSTRING tCOLON tLESS tNUMBER {
 	$$ = q
 }
 |
-tSTRING tCOLON tLESS tEQUAL tNUMBER {
+tSTRING tCOLON tLESS tEQUAL posOrNegNumber {
 	field := $1
-	max, _ := strconv.ParseFloat($5, 64)
+	max, err := strconv.ParseFloat($5, 64)
+	if err != nil {
+		yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+	}
 	maxInclusive := true
 	logDebugGrammar("FIELD - LESS THAN OR EQUAL %f", max)
 	q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -287,3 +317,12 @@ tBOOST {
 	}
 	logDebugGrammar("BOOST %f", boost)
 };
+
+posOrNegNumber:
+tNUMBER {
+	$$ = $1
+}
+|
+tMINUS tNUMBER {
+	$$ = "-" + $2
+};

vendor/github.com/blevesearch/bleve/search/query/query_string.y.go

@@ -70,57 +70,58 @@ var yyExca = [...]int{
 	-2, 5,
 }
 
-const yyNprod = 26
+const yyNprod = 28
 const yyPrivate = 57344
 
 var yyTokenNames []string
 var yyStates []string
 
-const yyLast = 31
+const yyLast = 42
 
 var yyAct = [...]int{
 
-	16, 18, 21, 13, 27, 24, 17, 19, 20, 25,
-	22, 15, 26, 23, 9, 11, 31, 14, 29, 3,
-	10, 30, 2, 28, 5, 6, 7, 1, 4, 12,
-	8,
+	17, 16, 18, 23, 22, 30, 3, 21, 19, 20,
+	29, 26, 22, 22, 1, 21, 21, 15, 28, 25,
+	24, 27, 34, 14, 22, 13, 31, 21, 32, 33,
+	22, 9, 11, 21, 5, 6, 2, 10, 4, 12,
+	7, 8,
 }
 var yyPact = [...]int{
 
-	18, -1000, -1000, 18, 10, -1000, -1000, -1000, -6, 3,
-	-1000, -1000, -1000, -1000, -1000, -4, -12, -1000, -1000, 0,
-	-1, -1000, -1000, 13, -1000, -1000, 11, -1000, -1000, -1000,
-	-1000, -1000,
+	28, -1000, -1000, 28, 27, -1000, -1000, -1000, 16, 9,
+	-1000, -1000, -1000, -1000, -1000, -3, -11, -1000, -1000, 6,
+	5, -1000, -5, -1000, -1000, 23, -1000, -1000, 17, -1000,
+	-1000, -1000, -1000, -1000, -1000,
 }
 var yyPgo = [...]int{
 
-	0, 30, 29, 28, 27, 22, 19,
+	0, 0, 41, 39, 38, 14, 36, 6,
 }
 var yyR1 = [...]int{
 
-	0, 4, 5, 5, 6, 3, 3, 3, 1, 1,
-	1, 1, 1, 1, 1, 1, 1, 1, 1, 1,
-	1, 1, 1, 1, 2, 2,
+	0, 5, 6, 6, 7, 4, 4, 4, 2, 2,
+	2, 2, 2, 2, 2, 2, 2, 2, 2, 2,
+	2, 2, 2, 2, 3, 3, 1, 1,
 }
 var yyR2 = [...]int{
 
 	0, 1, 2, 1, 3, 0, 1, 1, 1, 2,
 	4, 1, 1, 3, 3, 3, 4, 5, 4, 5,
-	4, 5, 4, 5, 0, 1,
+	4, 5, 4, 5, 0, 1, 1, 2,
 }
 var yyChk = [...]int{
 
-	-1000, -4, -5, -6, -3, 6, 7, -5, -1, 4,
-	10, 5, -2, 9, 14, 8, 4, 10, 5, 11,
-	12, 14, 10, 13, 5, 10, 13, 5, 10, 5,
-	10, 5,
+	-1000, -5, -6, -7, -4, 6, 7, -6, -2, 4,
+	10, 5, -3, 9, 14, 8, 4, -1, 5, 11,
+	12, 10, 7, 14, -1, 13, 5, -1, 13, 5,
+	10, -1, 5, -1, 5,
 }
 var yyDef = [...]int{
 
 	5, -2, 1, -2, 0, 6, 7, 2, 24, 8,
 	11, 12, 4, 25, 9, 0, 13, 14, 15, 0,
-	0, 10, 16, 0, 20, 18, 0, 22, 17, 21,
-	19, 23,
+	0, 26, 0, 10, 16, 0, 20, 18, 0, 22,
+	27, 17, 21, 19, 23,
 }
 var yyTok1 = [...]int{
 
@@ -474,25 +475,25 @@ yydefault:
 
 	case 1:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:39
+		//line query_string.y:40
 		{
 			logDebugGrammar("INPUT")
 		}
 	case 2:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line query_string.y:44
+		//line query_string.y:45
 		{
 			logDebugGrammar("SEARCH PARTS")
 		}
 	case 3:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:48
+		//line query_string.y:49
 		{
 			logDebugGrammar("SEARCH PART")
 		}
 	case 4:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:53
+		//line query_string.y:54
 		{
 			query := yyDollar[2].q
 			if yyDollar[3].pf != nil {
@@ -511,27 +512,27 @@ yydefault:
 		}
 	case 5:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line query_string.y:72
+		//line query_string.y:73
 		{
 			yyVAL.n = queryShould
 		}
 	case 6:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:76
+		//line query_string.y:77
 		{
 			logDebugGrammar("PLUS")
 			yyVAL.n = queryMust
 		}
 	case 7:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:81
+		//line query_string.y:82
 		{
 			logDebugGrammar("MINUS")
 			yyVAL.n = queryMustNot
 		}
 	case 8:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:87
+		//line query_string.y:88
 		{
 			str := yyDollar[1].s
 			logDebugGrammar("STRING - %s", str)
@@ -547,7 +548,7 @@ yydefault:
 		}
 	case 9:
 		yyDollar = yyS[yypt-2 : yypt+1]
-		//line query_string.y:101
+		//line query_string.y:102
 		{
 			str := yyDollar[1].s
 			fuzziness, err := strconv.ParseFloat(yyDollar[2].s, 64)
@@ -561,7 +562,7 @@ yydefault:
 		}
 	case 10:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:113
+		//line query_string.y:114
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
@@ -577,16 +578,24 @@ yydefault:
 		}
 	case 11:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:127
+		//line query_string.y:128
 		{
 			str := yyDollar[1].s
 			logDebugGrammar("STRING - %s", str)
-			q := NewMatchQuery(str)
+			q1 := NewMatchQuery(str)
+			val, err := strconv.ParseFloat(yyDollar[1].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
+			inclusive := true
+			q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+			q := NewDisjunctionQuery([]Query{q1, q2})
+			q.queryStringMode = true
 			yyVAL.q = q
 		}
 	case 12:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:134
+		//line query_string.y:143
 		{
 			phrase := yyDollar[1].s
 			logDebugGrammar("PHRASE - %s", phrase)
@@ -595,7 +604,7 @@ yydefault:
 		}
 	case 13:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:141
+		//line query_string.y:150
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
@@ -613,18 +622,27 @@ yydefault:
 		}
 	case 14:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:157
+		//line query_string.y:166
 		{
 			field := yyDollar[1].s
 			str := yyDollar[3].s
 			logDebugGrammar("FIELD - %s STRING - %s", field, str)
-			q := NewMatchQuery(str)
-			q.SetField(field)
+			q1 := NewMatchQuery(str)
+			q1.SetField(field)
+			val, err := strconv.ParseFloat(yyDollar[3].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
+			inclusive := true
+			q2 := NewNumericRangeInclusiveQuery(&val, &val, &inclusive, &inclusive)
+			q2.SetField(field)
+			q := NewDisjunctionQuery([]Query{q1, q2})
+			q.queryStringMode = true
 			yyVAL.q = q
 		}
 	case 15:
 		yyDollar = yyS[yypt-3 : yypt+1]
-		//line query_string.y:166
+		//line query_string.y:184
 		{
 			field := yyDollar[1].s
 			phrase := yyDollar[3].s
@@ -635,10 +653,13 @@ yydefault:
 		}
 	case 16:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:175
+		//line query_string.y:193
 		{
 			field := yyDollar[1].s
-			min, _ := strconv.ParseFloat(yyDollar[4].s, 64)
+			min, err := strconv.ParseFloat(yyDollar[4].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			minInclusive := false
 			logDebugGrammar("FIELD - GREATER THAN %f", min)
 			q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -647,10 +668,13 @@ yydefault:
 		}
 	case 17:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:185
+		//line query_string.y:206
 		{
 			field := yyDollar[1].s
-			min, _ := strconv.ParseFloat(yyDollar[5].s, 64)
+			min, err := strconv.ParseFloat(yyDollar[5].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			minInclusive := true
 			logDebugGrammar("FIELD - GREATER THAN OR EQUAL %f", min)
 			q := NewNumericRangeInclusiveQuery(&min, nil, &minInclusive, nil)
@@ -659,10 +683,13 @@ yydefault:
 		}
 	case 18:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:195
+		//line query_string.y:219
 		{
 			field := yyDollar[1].s
-			max, _ := strconv.ParseFloat(yyDollar[4].s, 64)
+			max, err := strconv.ParseFloat(yyDollar[4].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			maxInclusive := false
 			logDebugGrammar("FIELD - LESS THAN %f", max)
 			q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -671,10 +698,13 @@ yydefault:
 		}
 	case 19:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:205
+		//line query_string.y:232
 		{
 			field := yyDollar[1].s
-			max, _ := strconv.ParseFloat(yyDollar[5].s, 64)
+			max, err := strconv.ParseFloat(yyDollar[5].s, 64)
+			if err != nil {
+				yylex.(*lexerWrapper).lex.Error(fmt.Sprintf("error parsing number: %v", err))
+			}
 			maxInclusive := true
 			logDebugGrammar("FIELD - LESS THAN OR EQUAL %f", max)
 			q := NewNumericRangeInclusiveQuery(nil, &max, nil, &maxInclusive)
@@ -683,7 +713,7 @@ yydefault:
 		}
 	case 20:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:215
+		//line query_string.y:245
 		{
 			field := yyDollar[1].s
 			minInclusive := false
@@ -700,7 +730,7 @@ yydefault:
 		}
 	case 21:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:230
+		//line query_string.y:260
 		{
 			field := yyDollar[1].s
 			minInclusive := true
@@ -717,7 +747,7 @@ yydefault:
 		}
 	case 22:
 		yyDollar = yyS[yypt-4 : yypt+1]
-		//line query_string.y:245
+		//line query_string.y:275
 		{
 			field := yyDollar[1].s
 			maxInclusive := false
@@ -734,7 +764,7 @@ yydefault:
 		}
 	case 23:
 		yyDollar = yyS[yypt-5 : yypt+1]
-		//line query_string.y:260
+		//line query_string.y:290
 		{
 			field := yyDollar[1].s
 			maxInclusive := true
@@ -751,13 +781,13 @@ yydefault:
 		}
 	case 24:
 		yyDollar = yyS[yypt-0 : yypt+1]
-		//line query_string.y:276
+		//line query_string.y:306
 		{
 			yyVAL.pf = nil
 		}
 	case 25:
 		yyDollar = yyS[yypt-1 : yypt+1]
-		//line query_string.y:280
+		//line query_string.y:310
 		{
 			yyVAL.pf = nil
 			boost, err := strconv.ParseFloat(yyDollar[1].s, 64)
@@ -768,6 +798,18 @@ yydefault:
 			}
 			logDebugGrammar("BOOST %f", boost)
 		}
+	case 26:
+		yyDollar = yyS[yypt-1 : yypt+1]
+		//line query_string.y:322
+		{
+			yyVAL.s = yyDollar[1].s
+		}
+	case 27:
+		yyDollar = yyS[yypt-2 : yypt+1]
+		//line query_string.y:326
+		{
+			yyVAL.s = "-" + yyDollar[2].s
+		}
 	}
 	goto yystack /* stack new state and value */
 }

vendor/github.com/blevesearch/bleve/search/query/query_string_parser.go

@@ -12,7 +12,10 @@
 // See the License for the specific language governing permissions and
 // limitations under the License.
 
-//go:generate go tool yacc -o query_string.y.go query_string.y
+// as of Go 1.8 this requires the goyacc external tool
+// available from golang.org/x/tools/cmd/goyacc
+
+//go:generate goyacc -o query_string.y.go query_string.y
 //go:generate sed -i.tmp -e 1d query_string.y.go
 //go:generate rm query_string.y.go.tmp
 
@@ -31,6 +34,9 @@ var debugParser bool
 var debugLexer bool
 
 func parseQuerySyntax(query string) (rq Query, err error) {
+	if query == "" {
+		return NewMatchNoneQuery(), nil
+	}
 	lex := newLexerWrapper(newQueryStringLex(strings.NewReader(query)))
 	doParse(lex)
 
@@ -66,7 +72,7 @@ type lexerWrapper struct {
 func newLexerWrapper(lex yyLexer) *lexerWrapper {
 	return &lexerWrapper{
 		lex:   lex,
-		query: NewBooleanQuery(nil, nil, nil),
+		query: NewBooleanQueryForQueryString(nil, nil, nil),
 	}
 }
 

vendor/github.com/blevesearch/bleve/search/query/regexp.go

@@ -33,7 +33,9 @@ type RegexpQuery struct {
 
 // NewRegexpQuery creates a new Query which finds
 // documents containing terms that match the
-// specified regular expression.
+// specified regular expression.  The regexp pattern
+// SHOULD NOT include ^ or $ modifiers, the search
+// will only match entire terms even without them.
 func NewRegexpQuery(regexp string) *RegexpQuery {
 	return &RegexpQuery{
 		Regexp: regexp,
@@ -45,7 +47,7 @@ func (q *RegexpQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *RegexpQuery) Boost() float64{
+func (q *RegexpQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -53,11 +55,11 @@ func (q *RegexpQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *RegexpQuery) Field() string{
+func (q *RegexpQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -67,7 +69,7 @@ func (q *RegexpQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, expl
 		return nil, err
 	}
 
-	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), explain)
+	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), options)
 }
 
 func (q *RegexpQuery) Validate() error {
@@ -76,14 +78,14 @@ func (q *RegexpQuery) Validate() error {
 
 func (q *RegexpQuery) compile() error {
 	if q.compiled == nil {
-		// require that pattern be anchored to start and end of term
+		// require that pattern NOT be anchored to start and end of term
 		actualRegexp := q.Regexp
-		if !strings.HasPrefix(actualRegexp, "^") {
-			actualRegexp = "^" + actualRegexp
-		}
-		if !strings.HasSuffix(actualRegexp, "$") {
-			actualRegexp = actualRegexp + "$"
+		if strings.HasPrefix(actualRegexp, "^") {
+			actualRegexp = actualRegexp[1:] // remove leading ^
 		}
+		// do not attempt to remove trailing $, it's presence is not
+		// known to interfere with LiteralPrefix() the way ^ does
+		// and removing $ introduces possible ambiguities with escaped \$, \\$, etc
 		var err error
 		q.compiled, err = regexp.Compile(actualRegexp)
 		if err != nil {

vendor/github.com/blevesearch/bleve/search/query/term.go

@@ -40,7 +40,7 @@ func (q *TermQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *TermQuery) Boost() float64{
+func (q *TermQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -48,14 +48,14 @@ func (q *TermQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *TermQuery) Field() string{
+func (q *TermQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *TermQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *TermQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
 	}
-	return searcher.NewTermSearcher(i, q.Term, field, q.BoostVal.Value(), explain)
+	return searcher.NewTermSearcher(i, q.Term, field, q.BoostVal.Value(), options)
 }

vendor/github.com/blevesearch/bleve/search/query/term_range.go

@@ -0,0 +1,95 @@
+//  Copyright (c) 2017 Couchbase, Inc.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+// 		http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+package query
+
+import (
+	"fmt"
+
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/mapping"
+	"github.com/blevesearch/bleve/search"
+	"github.com/blevesearch/bleve/search/searcher"
+)
+
+type TermRangeQuery struct {
+	Min          string `json:"min,omitempty"`
+	Max          string `json:"max,omitempty"`
+	InclusiveMin *bool  `json:"inclusive_min,omitempty"`
+	InclusiveMax *bool  `json:"inclusive_max,omitempty"`
+	FieldVal     string `json:"field,omitempty"`
+	BoostVal     *Boost `json:"boost,omitempty"`
+}
+
+// NewTermRangeQuery creates a new Query for ranges
+// of text term values.
+// Either, but not both endpoints can be nil.
+// The minimum value is inclusive.
+// The maximum value is exclusive.
+func NewTermRangeQuery(min, max string) *TermRangeQuery {
+	return NewTermRangeInclusiveQuery(min, max, nil, nil)
+}
+
+// NewTermRangeInclusiveQuery creates a new Query for ranges
+// of numeric values.
+// Either, but not both endpoints can be nil.
+// Control endpoint inclusion with inclusiveMin, inclusiveMax.
+func NewTermRangeInclusiveQuery(min, max string, minInclusive, maxInclusive *bool) *TermRangeQuery {
+	return &TermRangeQuery{
+		Min:          min,
+		Max:          max,
+		InclusiveMin: minInclusive,
+		InclusiveMax: maxInclusive,
+	}
+}
+
+func (q *TermRangeQuery) SetBoost(b float64) {
+	boost := Boost(b)
+	q.BoostVal = &boost
+}
+
+func (q *TermRangeQuery) Boost() float64 {
+	return q.BoostVal.Value()
+}
+
+func (q *TermRangeQuery) SetField(f string) {
+	q.FieldVal = f
+}
+
+func (q *TermRangeQuery) Field() string {
+	return q.FieldVal
+}
+
+func (q *TermRangeQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
+	field := q.FieldVal
+	if q.FieldVal == "" {
+		field = m.DefaultSearchField()
+	}
+	var minTerm []byte
+	if q.Min != "" {
+		minTerm = []byte(q.Min)
+	}
+	var maxTerm []byte
+	if q.Max != "" {
+		maxTerm = []byte(q.Max)
+	}
+	return searcher.NewTermRangeSearcher(i, minTerm, maxTerm, q.InclusiveMin, q.InclusiveMax, field, q.BoostVal.Value(), options)
+}
+
+func (q *TermRangeQuery) Validate() error {
+	if q.Min == "" && q.Min == q.Max {
+		return fmt.Errorf("term range query must specify min or max")
+	}
+	return nil
+}

vendor/github.com/blevesearch/bleve/search/query/wildcard.go

@@ -66,7 +66,7 @@ func (q *WildcardQuery) SetBoost(b float64) {
 	q.BoostVal = &boost
 }
 
-func (q *WildcardQuery) Boost() float64{
+func (q *WildcardQuery) Boost() float64 {
 	return q.BoostVal.Value()
 }
 
@@ -74,11 +74,11 @@ func (q *WildcardQuery) SetField(f string) {
 	q.FieldVal = f
 }
 
-func (q *WildcardQuery) Field() string{
+func (q *WildcardQuery) Field() string {
 	return q.FieldVal
 }
 
-func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, explain bool) (search.Searcher, error) {
+func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, options search.SearcherOptions) (search.Searcher, error) {
 	field := q.FieldVal
 	if q.FieldVal == "" {
 		field = m.DefaultSearchField()
@@ -91,7 +91,7 @@ func (q *WildcardQuery) Searcher(i index.IndexReader, m mapping.IndexMapping, ex
 		}
 	}
 
-	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), explain)
+	return searcher.NewRegexpSearcher(i, q.compiled, field, q.BoostVal.Value(), options)
 }
 
 func (q *WildcardQuery) Validate() error {
@@ -101,6 +101,6 @@ func (q *WildcardQuery) Validate() error {
 }
 
 func (q *WildcardQuery) convertToRegexp() (*regexp.Regexp, error) {
-	regexpString := "^" + wildcardRegexpReplacer.Replace(q.Wildcard) + "$"
+	regexpString := wildcardRegexpReplacer.Replace(q.Wildcard)
 	return regexp.Compile(regexpString)
 }