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/collector/heap.go

@@ -34,11 +34,20 @@ func newStoreHeap(cap int, compare collectorCompare) *collectStoreHeap {
 	return rv
 }
 
-func (c *collectStoreHeap) Add(doc *search.DocumentMatch) {
+func (c *collectStoreHeap) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.Len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreHeap) add(doc *search.DocumentMatch) {
 	heap.Push(c, doc)
 }
 
-func (c *collectStoreHeap) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreHeap) removeLast() *search.DocumentMatch {
 	return heap.Pop(c).(*search.DocumentMatch)
 }
 
@@ -49,17 +58,12 @@ func (c *collectStoreHeap) Final(skip int, fixup collectorFixup) (search.Documen
 		return make(search.DocumentMatchCollection, 0), nil
 	}
 	rv := make(search.DocumentMatchCollection, size)
-	for count > 0 {
-		count--
-
-		if count >= skip {
-			size--
-			doc := heap.Pop(c).(*search.DocumentMatch)
-			rv[size] = doc
-			err := fixup(doc)
-			if err != nil {
-				return nil, err
-			}
+	for i := size - 1; i >= 0; i-- {
+		doc := heap.Pop(c).(*search.DocumentMatch)
+		rv[i] = doc
+		err := fixup(doc)
+		if err != nil {
+			return nil, err
 		}
 	}
 	return rv, nil

vendor/github.com/blevesearch/bleve/search/collector/list.go

@@ -34,7 +34,16 @@ func newStoreList(cap int, compare collectorCompare) *collectStoreList {
 	return rv
 }
 
-func (c *collectStoreList) Add(doc *search.DocumentMatch) {
+func (c *collectStoreList) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreList) add(doc *search.DocumentMatch) {
 	for e := c.results.Front(); e != nil; e = e.Next() {
 		curr := e.Value.(*search.DocumentMatch)
 		if c.compare(doc, curr) >= 0 {
@@ -46,7 +55,7 @@ func (c *collectStoreList) Add(doc *search.DocumentMatch) {
 	c.results.PushBack(doc)
 }
 
-func (c *collectStoreList) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreList) removeLast() *search.DocumentMatch {
 	return c.results.Remove(c.results.Front()).(*search.DocumentMatch)
 }
 
@@ -73,6 +82,6 @@ func (c *collectStoreList) Final(skip int, fixup collectorFixup) (search.Documen
 	return search.DocumentMatchCollection{}, nil
 }
 
-func (c *collectStoreList) Len() int {
+func (c *collectStoreList) len() int {
 	return c.results.Len()
 }

vendor/github.com/blevesearch/bleve/search/collector/slice.go

@@ -29,7 +29,16 @@ func newStoreSlice(cap int, compare collectorCompare) *collectStoreSlice {
 	return rv
 }
 
-func (c *collectStoreSlice) Add(doc *search.DocumentMatch) {
+func (c *collectStoreSlice) AddNotExceedingSize(doc *search.DocumentMatch,
+	size int) *search.DocumentMatch {
+	c.add(doc)
+	if c.len() > size {
+		return c.removeLast()
+	}
+	return nil
+}
+
+func (c *collectStoreSlice) add(doc *search.DocumentMatch) {
 	// find where to insert, starting at end (lowest)
 	i := len(c.slice)
 	for ; i > 0; i-- {
@@ -44,7 +53,7 @@ func (c *collectStoreSlice) Add(doc *search.DocumentMatch) {
 	c.slice[i] = doc
 }
 
-func (c *collectStoreSlice) RemoveLast() *search.DocumentMatch {
+func (c *collectStoreSlice) removeLast() *search.DocumentMatch {
 	var rv *search.DocumentMatch
 	rv, c.slice = c.slice[len(c.slice)-1], c.slice[:len(c.slice)-1]
 	return rv
@@ -63,6 +72,6 @@ func (c *collectStoreSlice) Final(skip int, fixup collectorFixup) (search.Docume
 	return search.DocumentMatchCollection{}, nil
 }
 
-func (c *collectStoreSlice) Len() int {
+func (c *collectStoreSlice) len() int {
 	return len(c.slice)
 }

vendor/github.com/blevesearch/bleve/search/collector/topn.go

@@ -22,6 +22,15 @@ import (
 	"golang.org/x/net/context"
 )
 
+type collectorStore interface {
+	// Add the document, and if the new store size exceeds the provided size
+	// the last element is removed and returned.  If the size has not been
+	// exceeded, nil is returned.
+	AddNotExceedingSize(doc *search.DocumentMatch, size int) *search.DocumentMatch
+
+	Final(skip int, fixup collectorFixup) (search.DocumentMatchCollection, error)
+}
+
 // PreAllocSizeSkipCap will cap preallocation to this amount when
 // size+skip exceeds this value
 var PreAllocSizeSkipCap = 1000
@@ -41,7 +50,7 @@ type TopNCollector struct {
 	results       search.DocumentMatchCollection
 	facetsBuilder *search.FacetsBuilder
 
-	store *collectStoreSlice
+	store collectorStore
 
 	needDocIds    bool
 	neededFields  []string
@@ -68,9 +77,15 @@ func NewTopNCollector(size int, skip int, sort search.SortOrder) *TopNCollector
 		backingSize = PreAllocSizeSkipCap + 1
 	}
 
-	hc.store = newStoreSlice(backingSize, func(i, j *search.DocumentMatch) int {
-		return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
-	})
+	if size+skip > 10 {
+		hc.store = newStoreHeap(backingSize, func(i, j *search.DocumentMatch) int {
+			return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
+		})
+	} else {
+		hc.store = newStoreSlice(backingSize, func(i, j *search.DocumentMatch) int {
+			return hc.sort.Compare(hc.cachedScoring, hc.cachedDesc, i, j)
+		})
+	}
 
 	// these lookups traverse an interface, so do once up-front
 	if sort.RequiresDocID() {
@@ -114,12 +129,6 @@ func (hc *TopNCollector) Collect(ctx context.Context, searcher search.Searcher,
 			default:
 			}
 		}
-		if hc.facetsBuilder != nil {
-			err = hc.facetsBuilder.Update(next)
-			if err != nil {
-				break
-			}
-		}
 
 		err = hc.collectSingle(searchContext, reader, next)
 		if err != nil {
@@ -144,6 +153,16 @@ func (hc *TopNCollector) Collect(ctx context.Context, searcher search.Searcher,
 var sortByScoreOpt = []string{"_score"}
 
 func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.IndexReader, d *search.DocumentMatch) error {
+	var err error
+
+	// visit field terms for features that require it (sort, facets)
+	if len(hc.neededFields) > 0 {
+		err = hc.visitFieldTerms(reader, d)
+		if err != nil {
+			return err
+		}
+	}
+
 	// increment total hits
 	hc.total++
 	d.HitNumber = hc.total
@@ -153,7 +172,6 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		hc.maxScore = d.Score
 	}
 
-	var err error
 	// see if we need to load ID (at this early stage, for example to sort on it)
 	if hc.needDocIds {
 		d.ID, err = reader.ExternalID(d.IndexInternalID)
@@ -162,22 +180,6 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		}
 	}
 
-	// see if we need to load the stored fields
-	if len(hc.neededFields) > 0 {
-		// find out which fields haven't been loaded yet
-		fieldsToLoad := d.CachedFieldTerms.FieldsNotYetCached(hc.neededFields)
-		// look them up
-		fieldTerms, err := reader.DocumentFieldTerms(d.IndexInternalID, fieldsToLoad)
-		if err != nil {
-			return err
-		}
-		// cache these as well
-		if d.CachedFieldTerms == nil {
-			d.CachedFieldTerms = make(map[string][]string)
-		}
-		d.CachedFieldTerms.Merge(fieldTerms)
-	}
-
 	// compute this hits sort value
 	if len(hc.sort) == 1 && hc.cachedScoring[0] {
 		d.Sort = sortByScoreOpt
@@ -197,9 +199,8 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 		}
 	}
 
-	hc.store.Add(d)
-	if hc.store.Len() > hc.size+hc.skip {
-		removed := hc.store.RemoveLast()
+	removed := hc.store.AddNotExceedingSize(d, hc.size+hc.skip)
+	if removed != nil {
 		if hc.lowestMatchOutsideResults == nil {
 			hc.lowestMatchOutsideResults = removed
 		} else {
@@ -215,9 +216,31 @@ func (hc *TopNCollector) collectSingle(ctx *search.SearchContext, reader index.I
 	return nil
 }
 
+// visitFieldTerms is responsible for visiting the field terms of the
+// search hit, and passing visited terms to the sort and facet builder
+func (hc *TopNCollector) visitFieldTerms(reader index.IndexReader, d *search.DocumentMatch) error {
+	if hc.facetsBuilder != nil {
+		hc.facetsBuilder.StartDoc()
+	}
+
+	err := reader.DocumentVisitFieldTerms(d.IndexInternalID, hc.neededFields, func(field string, term []byte) {
+		if hc.facetsBuilder != nil {
+			hc.facetsBuilder.UpdateVisitor(field, term)
+		}
+		hc.sort.UpdateVisitor(field, term)
+	})
+
+	if hc.facetsBuilder != nil {
+		hc.facetsBuilder.EndDoc()
+	}
+
+	return err
+}
+
 // SetFacetsBuilder registers a facet builder for this collector
 func (hc *TopNCollector) SetFacetsBuilder(facetsBuilder *search.FacetsBuilder) {
 	hc.facetsBuilder = facetsBuilder
+	hc.neededFields = append(hc.neededFields, hc.facetsBuilder.RequiredFields()...)
 }
 
 // finalizeResults starts with the heap containing the final top size+skip

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_datetime.go

@@ -18,7 +18,6 @@ import (
 	"sort"
 	"time"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/numeric"
 	"github.com/blevesearch/bleve/search"
 )
@@ -35,6 +34,7 @@ type DateTimeFacetBuilder struct {
 	total      int
 	missing    int
 	ranges     map[string]*dateTimeRange
+	sawValue   bool
 }
 
 func NewDateTimeFacetBuilder(field string, size int) *DateTimeFacetBuilder {
@@ -58,36 +58,35 @@ func (fb *DateTimeFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *DateTimeFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			// only consider the values which are shifted 0
-			prefixCoded := numeric.PrefixCoded(term)
-			shift, err := prefixCoded.Shift()
-			if err == nil && shift == 0 {
-				i64, err := prefixCoded.Int64()
-				if err == nil {
-					t := time.Unix(0, i64)
+func (fb *DateTimeFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		// only consider the values which are shifted 0
+		prefixCoded := numeric.PrefixCoded(term)
+		shift, err := prefixCoded.Shift()
+		if err == nil && shift == 0 {
+			i64, err := prefixCoded.Int64()
+			if err == nil {
+				t := time.Unix(0, i64)
 
-					// look at each of the ranges for a match
-					for rangeName, r := range fb.ranges {
-
-						if (r.start.IsZero() || t.After(r.start) || t.Equal(r.start)) && (r.end.IsZero() || t.Before(r.end)) {
-
-							existingCount, existed := fb.termsCount[rangeName]
-							if existed {
-								fb.termsCount[rangeName] = existingCount + 1
-							} else {
-								fb.termsCount[rangeName] = 1
-							}
-							fb.total++
-						}
+				// look at each of the ranges for a match
+				for rangeName, r := range fb.ranges {
+					if (r.start.IsZero() || t.After(r.start) || t.Equal(r.start)) && (r.end.IsZero() || t.Before(r.end)) {
+						fb.termsCount[rangeName] = fb.termsCount[rangeName] + 1
+						fb.total++
 					}
 				}
 			}
 		}
-	} else {
+	}
+}
+
+func (fb *DateTimeFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *DateTimeFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_numeric.go

@@ -17,7 +17,6 @@ package facet
 import (
 	"sort"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/numeric"
 	"github.com/blevesearch/bleve/search"
 )
@@ -34,6 +33,7 @@ type NumericFacetBuilder struct {
 	total      int
 	missing    int
 	ranges     map[string]*numericRange
+	sawValue   bool
 }
 
 func NewNumericFacetBuilder(field string, size int) *NumericFacetBuilder {
@@ -57,36 +57,35 @@ func (fb *NumericFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *NumericFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			// only consider the values which are shifted 0
-			prefixCoded := numeric.PrefixCoded(term)
-			shift, err := prefixCoded.Shift()
-			if err == nil && shift == 0 {
-				i64, err := prefixCoded.Int64()
-				if err == nil {
-					f64 := numeric.Int64ToFloat64(i64)
+func (fb *NumericFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		// only consider the values which are shifted 0
+		prefixCoded := numeric.PrefixCoded(term)
+		shift, err := prefixCoded.Shift()
+		if err == nil && shift == 0 {
+			i64, err := prefixCoded.Int64()
+			if err == nil {
+				f64 := numeric.Int64ToFloat64(i64)
 
-					// look at each of the ranges for a match
-					for rangeName, r := range fb.ranges {
-
-						if (r.min == nil || f64 >= *r.min) && (r.max == nil || f64 < *r.max) {
-
-							existingCount, existed := fb.termsCount[rangeName]
-							if existed {
-								fb.termsCount[rangeName] = existingCount + 1
-							} else {
-								fb.termsCount[rangeName] = 1
-							}
-							fb.total++
-						}
+				// look at each of the ranges for a match
+				for rangeName, r := range fb.ranges {
+					if (r.min == nil || f64 >= *r.min) && (r.max == nil || f64 < *r.max) {
+						fb.termsCount[rangeName] = fb.termsCount[rangeName] + 1
+						fb.total++
 					}
 				}
 			}
 		}
-	} else {
+	}
+}
+
+func (fb *NumericFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *NumericFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

vendor/github.com/blevesearch/bleve/search/facet/facet_builder_terms.go

@@ -17,7 +17,6 @@ package facet
 import (
 	"sort"
 
-	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/search"
 )
 
@@ -27,6 +26,7 @@ type TermsFacetBuilder struct {
 	termsCount map[string]int
 	total      int
 	missing    int
+	sawValue   bool
 }
 
 func NewTermsFacetBuilder(field string, size int) *TermsFacetBuilder {
@@ -41,19 +41,20 @@ func (fb *TermsFacetBuilder) Field() string {
 	return fb.field
 }
 
-func (fb *TermsFacetBuilder) Update(ft index.FieldTerms) {
-	terms, ok := ft[fb.field]
-	if ok {
-		for _, term := range terms {
-			existingCount, existed := fb.termsCount[term]
-			if existed {
-				fb.termsCount[term] = existingCount + 1
-			} else {
-				fb.termsCount[term] = 1
-			}
-			fb.total++
-		}
-	} else {
+func (fb *TermsFacetBuilder) UpdateVisitor(field string, term []byte) {
+	if field == fb.field {
+		fb.sawValue = true
+		fb.termsCount[string(term)] = fb.termsCount[string(term)] + 1
+		fb.total++
+	}
+}
+
+func (fb *TermsFacetBuilder) StartDoc() {
+	fb.sawValue = false
+}
+
+func (fb *TermsFacetBuilder) EndDoc() {
+	if !fb.sawValue {
 		fb.missing++
 	}
 }

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

@@ -21,7 +21,10 @@ import (
 )
 
 type FacetBuilder interface {
-	Update(index.FieldTerms)
+	StartDoc()
+	UpdateVisitor(field string, term []byte)
+	EndDoc()
+
 	Result() *FacetResult
 	Field() string
 }
@@ -41,33 +44,29 @@ func NewFacetsBuilder(indexReader index.IndexReader) *FacetsBuilder {
 
 func (fb *FacetsBuilder) Add(name string, facetBuilder FacetBuilder) {
 	fb.facets[name] = facetBuilder
+	fb.fields = append(fb.fields, facetBuilder.Field())
 }
 
-func (fb *FacetsBuilder) Update(docMatch *DocumentMatch) error {
-	if fb.fields == nil {
-		for _, facetBuilder := range fb.facets {
-			fb.fields = append(fb.fields, facetBuilder.Field())
-		}
-	}
+func (fb *FacetsBuilder) RequiredFields() []string {
+	return fb.fields
+}
 
-	if len(fb.fields) > 0 {
-		// find out which fields haven't been loaded yet
-		fieldsToLoad := docMatch.CachedFieldTerms.FieldsNotYetCached(fb.fields)
-		// look them up
-		fieldTerms, err := fb.indexReader.DocumentFieldTerms(docMatch.IndexInternalID, fieldsToLoad)
-		if err != nil {
-			return err
-		}
-		// cache these as well
-		if docMatch.CachedFieldTerms == nil {
-			docMatch.CachedFieldTerms = make(map[string][]string)
-		}
-		docMatch.CachedFieldTerms.Merge(fieldTerms)
-	}
+func (fb *FacetsBuilder) StartDoc() {
 	for _, facetBuilder := range fb.facets {
-		facetBuilder.Update(docMatch.CachedFieldTerms)
+		facetBuilder.StartDoc()
+	}
+}
+
+func (fb *FacetsBuilder) EndDoc() {
+	for _, facetBuilder := range fb.facets {
+		facetBuilder.EndDoc()
+	}
+}
+
+func (fb *FacetsBuilder) UpdateVisitor(field string, term []byte) {
+	for _, facetBuilder := range fb.facets {
+		facetBuilder.UpdateVisitor(field, term)
 	}
-	return nil
 }
 
 type TermFacet struct {

vendor/github.com/blevesearch/bleve/search/highlight/format/html/html.go

@@ -44,7 +44,7 @@ func (a *FragmentFormatter) Format(f *highlight.Fragment, orderedTermLocations h
 			continue
 		}
 		// make sure the array positions match
-		if !highlight.SameArrayPositions(f.ArrayPositions, termLocation.ArrayPositions) {
+		if !termLocation.ArrayPositions.Equals(f.ArrayPositions) {
 			continue
 		}
 		if termLocation.Start < curr {

vendor/github.com/blevesearch/bleve/search/highlight/highlighter/simple/fragment_scorer_simple.go

@@ -37,7 +37,7 @@ func (s *FragmentScorer) Score(f *highlight.Fragment) {
 OUTER:
 	for _, locations := range s.tlm {
 		for _, location := range locations {
-			if highlight.SameArrayPositions(f.ArrayPositions, location.ArrayPositions) && int(location.Start) >= f.Start && int(location.End) <= f.End {
+			if location.ArrayPositions.Equals(f.ArrayPositions) && int(location.Start) >= f.Start && int(location.End) <= f.End {
 				score += 1.0
 				// once we find a term in the fragment
 				// don't care about additional matches

vendor/github.com/blevesearch/bleve/search/highlight/highlighter/simple/highlighter_simple.go

@@ -87,7 +87,7 @@ func (s *Highlighter) BestFragmentsInField(dm *search.DocumentMatch, doc *docume
 			if ok {
 				termLocationsSameArrayPosition := make(highlight.TermLocations, 0)
 				for _, otl := range orderedTermLocations {
-					if highlight.SameArrayPositions(f.ArrayPositions(), otl.ArrayPositions) {
+					if otl.ArrayPositions.Equals(f.ArrayPositions()) {
 						termLocationsSameArrayPosition = append(termLocationsSameArrayPosition, otl)
 					}
 				}

vendor/github.com/blevesearch/bleve/search/highlight/term_locations.go

@@ -23,7 +23,7 @@ import (
 
 type TermLocation struct {
 	Term           string
-	ArrayPositions []float64
+	ArrayPositions search.ArrayPositions
 	Pos            int
 	Start          int
 	End            int
@@ -103,15 +103,3 @@ func OrderTermLocations(tlm search.TermLocationMap) TermLocations {
 	sort.Sort(rv)
 	return rv
 }
-
-func SameArrayPositions(fieldArrayPositions []uint64, termLocationArrayPositions []float64) bool {
-	if len(fieldArrayPositions) != len(termLocationArrayPositions) {
-		return false
-	}
-	for i := 0; i < len(fieldArrayPositions); i++ {
-		if fieldArrayPositions[i] != uint64(termLocationArrayPositions[i]) {
-			return false
-		}
-	}
-	return true
-}

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

@@ -37,13 +37,17 @@ func defaultDocumentMatchPoolTooSmall(p *DocumentMatchPool) *DocumentMatch {
 // pre-allocated to accommodate the requested number of DocumentMatch
 // instances
 func NewDocumentMatchPool(size, sortsize int) *DocumentMatchPool {
-	avail := make(DocumentMatchCollection, 0, size)
+	avail := make(DocumentMatchCollection, size)
 	// pre-allocate the expected number of instances
 	startBlock := make([]DocumentMatch, size)
+	startSorts := make([]string, size*sortsize)
 	// make these initial instances available
-	for i := range startBlock {
-		startBlock[i].Sort = make([]string, 0, sortsize)
-		avail = append(avail, &startBlock[i])
+	i, j := 0, 0
+	for i < size {
+		avail[i] = &startBlock[i]
+		avail[i].Sort = startSorts[j:j]
+		i += 1
+		j += sortsize
 	}
 	return &DocumentMatchPool{
 		avail:    avail,

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)
 }

vendor/github.com/blevesearch/bleve/search/scorer/scorer_conjunction.go

@@ -19,26 +19,26 @@ import (
 )
 
 type ConjunctionQueryScorer struct {
-	explain bool
+	options search.SearcherOptions
 }
 
-func NewConjunctionQueryScorer(explain bool) *ConjunctionQueryScorer {
+func NewConjunctionQueryScorer(options search.SearcherOptions) *ConjunctionQueryScorer {
 	return &ConjunctionQueryScorer{
-		explain: explain,
+		options: options,
 	}
 }
 
 func (s *ConjunctionQueryScorer) Score(ctx *search.SearchContext, constituents []*search.DocumentMatch) *search.DocumentMatch {
 	var sum float64
 	var childrenExplanations []*search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations = make([]*search.Explanation, len(constituents))
 	}
 
 	locations := []search.FieldTermLocationMap{}
 	for i, docMatch := range constituents {
 		sum += docMatch.Score
-		if s.explain {
+		if s.options.Explain {
 			childrenExplanations[i] = docMatch.Expl
 		}
 		if docMatch.Locations != nil {
@@ -47,7 +47,7 @@ func (s *ConjunctionQueryScorer) Score(ctx *search.SearchContext, constituents [
 	}
 	newScore := sum
 	var newExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		newExpl = &search.Explanation{Value: sum, Message: "sum of:", Children: childrenExplanations}
 	}
 

vendor/github.com/blevesearch/bleve/search/scorer/scorer_constant.go

@@ -24,15 +24,15 @@ import (
 type ConstantScorer struct {
 	constant               float64
 	boost                  float64
-	explain                bool
+	options                search.SearcherOptions
 	queryNorm              float64
 	queryWeight            float64
 	queryWeightExplanation *search.Explanation
 }
 
-func NewConstantScorer(constant float64, boost float64, explain bool) *ConstantScorer {
+func NewConstantScorer(constant float64, boost float64, options search.SearcherOptions) *ConstantScorer {
 	rv := ConstantScorer{
-		explain:     explain,
+		options:     options,
 		queryWeight: 1.0,
 		constant:    constant,
 		boost:       boost,
@@ -52,7 +52,7 @@ func (s *ConstantScorer) SetQueryNorm(qnorm float64) {
 	// update the query weight
 	s.queryWeight = s.boost * s.queryNorm
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 2)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   s.boost,
@@ -75,7 +75,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 
 	score := s.constant
 
-	if s.explain {
+	if s.options.Explain {
 		scoreExplanation = &search.Explanation{
 			Value:   score,
 			Message: fmt.Sprintf("ConstantScore()"),
@@ -85,7 +85,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 	// if the query weight isn't 1, multiply
 	if s.queryWeight != 1.0 {
 		score = score * s.queryWeight
-		if s.explain {
+		if s.options.Explain {
 			childExplanations := make([]*search.Explanation, 2)
 			childExplanations[0] = s.queryWeightExplanation
 			childExplanations[1] = scoreExplanation
@@ -100,7 +100,7 @@ func (s *ConstantScorer) Score(ctx *search.SearchContext, id index.IndexInternal
 	rv := ctx.DocumentMatchPool.Get()
 	rv.IndexInternalID = id
 	rv.Score = score
-	if s.explain {
+	if s.options.Explain {
 		rv.Expl = scoreExplanation
 	}
 

vendor/github.com/blevesearch/bleve/search/scorer/scorer_disjunction.go

@@ -21,26 +21,26 @@ import (
 )
 
 type DisjunctionQueryScorer struct {
-	explain bool
+	options search.SearcherOptions
 }
 
-func NewDisjunctionQueryScorer(explain bool) *DisjunctionQueryScorer {
+func NewDisjunctionQueryScorer(options search.SearcherOptions) *DisjunctionQueryScorer {
 	return &DisjunctionQueryScorer{
-		explain: explain,
+		options: options,
 	}
 }
 
 func (s *DisjunctionQueryScorer) Score(ctx *search.SearchContext, constituents []*search.DocumentMatch, countMatch, countTotal int) *search.DocumentMatch {
 	var sum float64
 	var childrenExplanations []*search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations = make([]*search.Explanation, len(constituents))
 	}
 
 	var locations []search.FieldTermLocationMap
 	for i, docMatch := range constituents {
 		sum += docMatch.Score
-		if s.explain {
+		if s.options.Explain {
 			childrenExplanations[i] = docMatch.Expl
 		}
 		if docMatch.Locations != nil {
@@ -49,14 +49,14 @@ func (s *DisjunctionQueryScorer) Score(ctx *search.SearchContext, constituents [
 	}
 
 	var rawExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		rawExpl = &search.Explanation{Value: sum, Message: "sum of:", Children: childrenExplanations}
 	}
 
 	coord := float64(countMatch) / float64(countTotal)
 	newScore := sum * coord
 	var newExpl *search.Explanation
-	if s.explain {
+	if s.options.Explain {
 		ce := make([]*search.Explanation, 2)
 		ce[0] = rawExpl
 		ce[1] = &search.Explanation{Value: coord, Message: fmt.Sprintf("coord(%d/%d)", countMatch, countTotal)}

vendor/github.com/blevesearch/bleve/search/scorer/scorer_term.go

@@ -23,20 +23,20 @@ import (
 )
 
 type TermQueryScorer struct {
-	queryTerm              string
+	queryTerm              []byte
 	queryField             string
 	queryBoost             float64
 	docTerm                uint64
 	docTotal               uint64
 	idf                    float64
-	explain                bool
+	options                search.SearcherOptions
 	idfExplanation         *search.Explanation
 	queryNorm              float64
 	queryWeight            float64
 	queryWeightExplanation *search.Explanation
 }
 
-func NewTermQueryScorer(queryTerm string, queryField string, queryBoost float64, docTotal, docTerm uint64, explain bool) *TermQueryScorer {
+func NewTermQueryScorer(queryTerm []byte, queryField string, queryBoost float64, docTotal, docTerm uint64, options search.SearcherOptions) *TermQueryScorer {
 	rv := TermQueryScorer{
 		queryTerm:   queryTerm,
 		queryField:  queryField,
@@ -44,11 +44,11 @@ func NewTermQueryScorer(queryTerm string, queryField string, queryBoost float64,
 		docTerm:     docTerm,
 		docTotal:    docTotal,
 		idf:         1.0 + math.Log(float64(docTotal)/float64(docTerm+1.0)),
-		explain:     explain,
+		options:     options,
 		queryWeight: 1.0,
 	}
 
-	if explain {
+	if options.Explain {
 		rv.idfExplanation = &search.Explanation{
 			Value:   rv.idf,
 			Message: fmt.Sprintf("idf(docFreq=%d, maxDocs=%d)", docTerm, docTotal),
@@ -69,7 +69,7 @@ func (s *TermQueryScorer) SetQueryNorm(qnorm float64) {
 	// update the query weight
 	s.queryWeight = s.queryBoost * s.idf * s.queryNorm
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 3)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   s.queryBoost,
@@ -100,7 +100,7 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	}
 	score := tf * termMatch.Norm * s.idf
 
-	if s.explain {
+	if s.options.Explain {
 		childrenExplanations := make([]*search.Explanation, 3)
 		childrenExplanations[0] = &search.Explanation{
 			Value:   tf,
@@ -121,7 +121,7 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	// if the query weight isn't 1, multiply
 	if s.queryWeight != 1.0 {
 		score = score * s.queryWeight
-		if s.explain {
+		if s.options.Explain {
 			childExplanations := make([]*search.Explanation, 2)
 			childExplanations[0] = s.queryWeightExplanation
 			childExplanations[1] = scoreExplanation
@@ -136,44 +136,46 @@ func (s *TermQueryScorer) Score(ctx *search.SearchContext, termMatch *index.Term
 	rv := ctx.DocumentMatchPool.Get()
 	rv.IndexInternalID = append(rv.IndexInternalID, termMatch.ID...)
 	rv.Score = score
-	if s.explain {
+	if s.options.Explain {
 		rv.Expl = scoreExplanation
 	}
 
 	if termMatch.Vectors != nil && len(termMatch.Vectors) > 0 {
+		locs := make([]search.Location, len(termMatch.Vectors))
+		locsUsed := 0
+
+		totalPositions := 0
+		for _, v := range termMatch.Vectors {
+			totalPositions += len(v.ArrayPositions)
+		}
+		positions := make(search.ArrayPositions, totalPositions)
+		positionsUsed := 0
 
 		rv.Locations = make(search.FieldTermLocationMap)
 		for _, v := range termMatch.Vectors {
 			tlm := rv.Locations[v.Field]
 			if tlm == nil {
 				tlm = make(search.TermLocationMap)
+				rv.Locations[v.Field] = tlm
 			}
 
-			loc := search.Location{
-				Pos:   float64(v.Pos),
-				Start: float64(v.Start),
-				End:   float64(v.End),
-			}
+			loc := &locs[locsUsed]
+			locsUsed++
+
+			loc.Pos = v.Pos
+			loc.Start = v.Start
+			loc.End = v.End
 
 			if len(v.ArrayPositions) > 0 {
-				loc.ArrayPositions = make([]float64, len(v.ArrayPositions))
+				loc.ArrayPositions = positions[positionsUsed : positionsUsed+len(v.ArrayPositions)]
 				for i, ap := range v.ArrayPositions {
-					loc.ArrayPositions[i] = float64(ap)
+					loc.ArrayPositions[i] = ap
 				}
+				positionsUsed += len(v.ArrayPositions)
 			}
 
-			locations := tlm[s.queryTerm]
-			if locations == nil {
-				locations = make(search.Locations, 1)
-				locations[0] = &loc
-			} else {
-				locations = append(locations, &loc)
-			}
-			tlm[s.queryTerm] = locations
-
-			rv.Locations[v.Field] = tlm
+			tlm[string(s.queryTerm)] = append(tlm[string(s.queryTerm)], loc)
 		}
-
 	}
 
 	return rv

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

@@ -21,27 +21,32 @@ import (
 	"github.com/blevesearch/bleve/index"
 )
 
-type Location struct {
-	Pos            float64   `json:"pos"`
-	Start          float64   `json:"start"`
-	End            float64   `json:"end"`
-	ArrayPositions []float64 `json:"array_positions"`
-}
+type ArrayPositions []uint64
 
-// SameArrayElement returns true if two locations are point to
-// the same array element
-func (l *Location) SameArrayElement(other *Location) bool {
-	if len(l.ArrayPositions) != len(other.ArrayPositions) {
+func (ap ArrayPositions) Equals(other ArrayPositions) bool {
+	if len(ap) != len(other) {
 		return false
 	}
-	for i, elem := range l.ArrayPositions {
-		if other.ArrayPositions[i] != elem {
+	for i := range ap {
+		if ap[i] != other[i] {
 			return false
 		}
 	}
 	return true
 }
 
+type Location struct {
+	// Pos is the position of the term within the field, starting at 1
+	Pos            uint64         `json:"pos"`
+	
+	// Start and End are the byte offsets of the term in the field
+	Start          uint64         `json:"start"`
+	End            uint64         `json:"end"`
+	
+	// ArrayPositions contains the positions of the term within any elements.
+	ArrayPositions ArrayPositions `json:"array_positions"`
+}
+
 type Locations []*Location
 
 type TermLocationMap map[string]Locations
@@ -69,10 +74,6 @@ type DocumentMatch struct {
 	// fields as float64s and date fields as time.RFC3339 formatted strings.
 	Fields map[string]interface{} `json:"fields,omitempty"`
 
-	// as we learn field terms, we can cache important ones for later use
-	// for example, sorting and building facets need these values
-	CachedFieldTerms index.FieldTerms `json:"-"`
-
 	// if we load the document for this hit, remember it so we dont load again
 	Document *document.Document `json:"-"`
 
@@ -138,6 +139,11 @@ type Searcher interface {
 	DocumentMatchPoolSize() int
 }
 
+type SearcherOptions struct {
+	Explain            bool
+	IncludeTermVectors bool
+}
+
 // SearchContext represents the context around a single search
 type SearchContext struct {
 	DocumentMatchPool *DocumentMatchPool

vendor/github.com/blevesearch/bleve/search/searcher/search_boolean.go

@@ -38,14 +38,14 @@ type BooleanSearcher struct {
 	initialized     bool
 }
 
-func NewBooleanSearcher(indexReader index.IndexReader, mustSearcher search.Searcher, shouldSearcher search.Searcher, mustNotSearcher search.Searcher, explain bool) (*BooleanSearcher, error) {
+func NewBooleanSearcher(indexReader index.IndexReader, mustSearcher search.Searcher, shouldSearcher search.Searcher, mustNotSearcher search.Searcher, options search.SearcherOptions) (*BooleanSearcher, error) {
 	// build our searcher
 	rv := BooleanSearcher{
 		indexReader:     indexReader,
 		mustSearcher:    mustSearcher,
 		shouldSearcher:  shouldSearcher,
 		mustNotSearcher: mustNotSearcher,
-		scorer:          scorer.NewConjunctionQueryScorer(explain),
+		scorer:          scorer.NewConjunctionQueryScorer(options),
 		matches:         make([]*search.DocumentMatch, 2),
 	}
 	rv.computeQueryNorm()

vendor/github.com/blevesearch/bleve/search/searcher/search_conjunction.go

@@ -31,10 +31,10 @@ type ConjunctionSearcher struct {
 	maxIDIdx    int
 	scorer      *scorer.ConjunctionQueryScorer
 	initialized bool
-	explain     bool
+	options     search.SearcherOptions
 }
 
-func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, explain bool) (*ConjunctionSearcher, error) {
+func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, options search.SearcherOptions) (*ConjunctionSearcher, error) {
 	// build the downstream searchers
 	searchers := make(OrderedSearcherList, len(qsearchers))
 	for i, searcher := range qsearchers {
@@ -45,10 +45,10 @@ func NewConjunctionSearcher(indexReader index.IndexReader, qsearchers []search.S
 	// build our searcher
 	rv := ConjunctionSearcher{
 		indexReader: indexReader,
-		explain:     explain,
+		options:     options,
 		searchers:   searchers,
 		currs:       make([]*search.DocumentMatch, len(searchers)),
-		scorer:      scorer.NewConjunctionQueryScorer(explain),
+		scorer:      scorer.NewConjunctionQueryScorer(options),
 	}
 	rv.computeQueryNorm()
 	return &rv, nil

vendor/github.com/blevesearch/bleve/search/searcher/search_disjunction.go

@@ -50,11 +50,22 @@ func tooManyClauses(count int) bool {
 }
 
 func tooManyClausesErr() error {
-	return fmt.Errorf("TooManyClauses[maxClauseCount is set to %d]", DisjunctionMaxClauseCount)
+	return fmt.Errorf("TooManyClauses[maxClauseCount is set to %d]",
+		DisjunctionMaxClauseCount)
 }
 
-func NewDisjunctionSearcher(indexReader index.IndexReader, qsearchers []search.Searcher, min float64, explain bool) (*DisjunctionSearcher, error) {
-	if tooManyClauses(len(qsearchers)) {
+func NewDisjunctionSearcher(indexReader index.IndexReader,
+	qsearchers []search.Searcher, min float64, options search.SearcherOptions) (
+	*DisjunctionSearcher, error) {
+	return newDisjunctionSearcher(indexReader, qsearchers, min, options,
+		true)
+}
+
+func newDisjunctionSearcher(indexReader index.IndexReader,
+	qsearchers []search.Searcher, min float64, options search.SearcherOptions,
+	limit bool) (
+	*DisjunctionSearcher, error) {
+	if limit && tooManyClauses(len(qsearchers)) {
 		return nil, tooManyClausesErr()
 	}
 	// build the downstream searchers
@@ -70,7 +81,7 @@ func NewDisjunctionSearcher(indexReader index.IndexReader, qsearchers []search.S
 		searchers:    searchers,
 		numSearchers: len(searchers),
 		currs:        make([]*search.DocumentMatch, len(searchers)),
-		scorer:       scorer.NewDisjunctionQueryScorer(explain),
+		scorer:       scorer.NewDisjunctionQueryScorer(options),
 		min:          int(min),
 		matching:     make([]*search.DocumentMatch, len(searchers)),
 		matchingIdxs: make([]int, len(searchers)),
@@ -161,7 +172,8 @@ func (s *DisjunctionSearcher) SetQueryNorm(qnorm float64) {
 	}
 }
 
-func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
+func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (
+	*search.DocumentMatch, error) {
 	if !s.initialized {
 		err := s.initSearchers(ctx)
 		if err != nil {
@@ -199,7 +211,8 @@ func (s *DisjunctionSearcher) Next(ctx *search.SearchContext) (*search.DocumentM
 	return rv, nil
 }
 
-func (s *DisjunctionSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
+func (s *DisjunctionSearcher) Advance(ctx *search.SearchContext,
+	ID index.IndexInternalID) (*search.DocumentMatch, error) {
 	if !s.initialized {
 		err := s.initSearchers(ctx)
 		if err != nil {

vendor/github.com/blevesearch/bleve/search/searcher/search_docid.go

@@ -28,13 +28,13 @@ type DocIDSearcher struct {
 }
 
 func NewDocIDSearcher(indexReader index.IndexReader, ids []string, boost float64,
-	explain bool) (searcher *DocIDSearcher, err error) {
+	options search.SearcherOptions) (searcher *DocIDSearcher, err error) {
 
 	reader, err := indexReader.DocIDReaderOnly(ids)
 	if err != nil {
 		return nil, err
 	}
-	scorer := scorer.NewConstantScorer(1.0, boost, explain)
+	scorer := scorer.NewConstantScorer(1.0, boost, options)
 	return &DocIDSearcher{
 		scorer: scorer,
 		reader: reader,

vendor/github.com/blevesearch/bleve/search/searcher/search_filter.go

@@ -0,0 +1,88 @@
+//  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 searcher
+
+import (
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/search"
+)
+
+// FilterFunc defines a function which can filter documents
+// returning true means keep the document
+// returning false means do not keep the document
+type FilterFunc func(d *search.DocumentMatch) bool
+
+// FilteringSearcher wraps any other searcher, but checks any Next/Advance
+// call against the supplied FilterFunc
+type FilteringSearcher struct {
+	child  search.Searcher
+	accept FilterFunc
+}
+
+func NewFilteringSearcher(s search.Searcher, filter FilterFunc) *FilteringSearcher {
+	return &FilteringSearcher{
+		child:  s,
+		accept: filter,
+	}
+}
+
+func (f *FilteringSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
+	next, err := f.child.Next(ctx)
+	for next != nil && err == nil {
+		if f.accept(next) {
+			return next, nil
+		}
+		next, err = f.child.Next(ctx)
+	}
+	return nil, err
+}
+
+func (f *FilteringSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
+	adv, err := f.child.Advance(ctx, ID)
+	if err != nil {
+		return nil, err
+	}
+	if adv == nil {
+		return nil, nil
+	}
+	if f.accept(adv) {
+		return adv, nil
+	}
+	return f.Next(ctx)
+}
+
+func (f *FilteringSearcher) Close() error {
+	return f.child.Close()
+}
+
+func (f *FilteringSearcher) Weight() float64 {
+	return f.child.Weight()
+}
+
+func (f *FilteringSearcher) SetQueryNorm(n float64) {
+	f.child.SetQueryNorm(n)
+}
+
+func (f *FilteringSearcher) Count() uint64 {
+	return f.child.Count()
+}
+
+func (f *FilteringSearcher) Min() int {
+	return f.child.Min()
+}
+
+func (f *FilteringSearcher) DocumentMatchPoolSize() int {
+	return f.child.DocumentMatchPoolSize()
+}

vendor/github.com/blevesearch/bleve/search/searcher/search_fuzzy.go

@@ -19,17 +19,9 @@ import (
 	"github.com/blevesearch/bleve/search"
 )
 
-type FuzzySearcher struct {
-	indexReader index.IndexReader
-	term        string
-	prefix      int
-	fuzziness   int
-	field       string
-	explain     bool
-	searcher    *DisjunctionSearcher
-}
-
-func NewFuzzySearcher(indexReader index.IndexReader, term string, prefix, fuzziness int, field string, boost float64, explain bool) (*FuzzySearcher, error) {
+func NewFuzzySearcher(indexReader index.IndexReader, term string,
+	prefix, fuzziness int, field string, boost float64,
+	options search.SearcherOptions) (search.Searcher, error) {
 	// Note: we don't byte slice the term for a prefix because of runes.
 	prefixTerm := ""
 	for i, r := range term {
@@ -40,46 +32,18 @@ func NewFuzzySearcher(indexReader index.IndexReader, term string, prefix, fuzzin
 		}
 	}
 
-	candidateTerms, err := findFuzzyCandidateTerms(indexReader, term, fuzziness, field, prefixTerm)
+	candidateTerms, err := findFuzzyCandidateTerms(indexReader, term, fuzziness,
+		field, prefixTerm)
 	if err != nil {
 		return nil, err
 	}
 
-	// enumerate all the terms in the range
-	qsearchers := make([]search.Searcher, 0, len(candidateTerms))
-	qsearchersClose := func() {
-		for _, searcher := range qsearchers {
-			_ = searcher.Close()
-		}
-	}
-	for _, cterm := range candidateTerms {
-		qsearcher, err := NewTermSearcher(indexReader, cterm, field, boost, explain)
-		if err != nil {
-			qsearchersClose()
-			return nil, err
-		}
-		qsearchers = append(qsearchers, qsearcher)
-	}
-
-	// build disjunction searcher of these ranges
-	searcher, err := NewDisjunctionSearcher(indexReader, qsearchers, 0, explain)
-	if err != nil {
-		qsearchersClose()
-		return nil, err
-	}
-
-	return &FuzzySearcher{
-		indexReader: indexReader,
-		term:        term,
-		prefix:      prefix,
-		fuzziness:   fuzziness,
-		field:       field,
-		explain:     explain,
-		searcher:    searcher,
-	}, nil
+	return NewMultiTermSearcher(indexReader, candidateTerms, field,
+		boost, options, true)
 }
 
-func findFuzzyCandidateTerms(indexReader index.IndexReader, term string, fuzziness int, field, prefixTerm string) (rv []string, err error) {
+func findFuzzyCandidateTerms(indexReader index.IndexReader, term string,
+	fuzziness int, field, prefixTerm string) (rv []string, err error) {
 	rv = make([]string, 0)
 	var fieldDict index.FieldDict
 	if len(prefixTerm) > 0 {
@@ -108,36 +72,3 @@ func findFuzzyCandidateTerms(indexReader index.IndexReader, term string, fuzzine
 
 	return rv, err
 }
-
-func (s *FuzzySearcher) Count() uint64 {
-	return s.searcher.Count()
-}
-
-func (s *FuzzySearcher) Weight() float64 {
-	return s.searcher.Weight()
-}
-
-func (s *FuzzySearcher) SetQueryNorm(qnorm float64) {
-	s.searcher.SetQueryNorm(qnorm)
-}
-
-func (s *FuzzySearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
-	return s.searcher.Next(ctx)
-
-}
-
-func (s *FuzzySearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
-	return s.searcher.Advance(ctx, ID)
-}
-
-func (s *FuzzySearcher) Close() error {
-	return s.searcher.Close()
-}
-
-func (s *FuzzySearcher) Min() int {
-	return 0
-}
-
-func (s *FuzzySearcher) DocumentMatchPoolSize() int {
-	return s.searcher.DocumentMatchPoolSize()
-}

vendor/github.com/blevesearch/bleve/search/searcher/search_geoboundingbox.go

@@ -0,0 +1,173 @@
+//  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 searcher
+
+import (
+	"github.com/blevesearch/bleve/document"
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/numeric"
+	"github.com/blevesearch/bleve/search"
+)
+
+func NewGeoBoundingBoxSearcher(indexReader index.IndexReader, minLon, minLat,
+	maxLon, maxLat float64, field string, boost float64,
+	options search.SearcherOptions, checkBoundaries bool) (
+	search.Searcher, error) {
+
+	// track list of opened searchers, for cleanup on early exit
+	var openedSearchers []search.Searcher
+	cleanupOpenedSearchers := func() {
+		for _, s := range openedSearchers {
+			_ = s.Close()
+		}
+	}
+
+	// do math to produce list of terms needed for this search
+	onBoundaryTerms, notOnBoundaryTerms := ComputeGeoRange(0, (geo.GeoBits<<1)-1,
+		minLon, minLat, maxLon, maxLat, checkBoundaries)
+
+	var onBoundarySearcher search.Searcher
+	if len(onBoundaryTerms) > 0 {
+		rawOnBoundarySearcher, err := NewMultiTermSearcherBytes(indexReader,
+			onBoundaryTerms, field, boost, options, false)
+		if err != nil {
+			return nil, err
+		}
+		// add filter to check points near the boundary
+		onBoundarySearcher = NewFilteringSearcher(rawOnBoundarySearcher,
+			buildRectFilter(indexReader, field, minLon, minLat, maxLon, maxLat))
+		openedSearchers = append(openedSearchers, onBoundarySearcher)
+	}
+
+	var notOnBoundarySearcher search.Searcher
+	if len(notOnBoundaryTerms) > 0 {
+		var err error
+		notOnBoundarySearcher, err = NewMultiTermSearcherBytes(indexReader,
+			notOnBoundaryTerms, field, boost, options, false)
+		if err != nil {
+			cleanupOpenedSearchers()
+			return nil, err
+		}
+		openedSearchers = append(openedSearchers, notOnBoundarySearcher)
+	}
+
+	if onBoundarySearcher != nil && notOnBoundarySearcher != nil {
+		rv, err := NewDisjunctionSearcher(indexReader,
+			[]search.Searcher{
+				onBoundarySearcher,
+				notOnBoundarySearcher,
+			},
+			0, options)
+		if err != nil {
+			cleanupOpenedSearchers()
+			return nil, err
+		}
+		return rv, nil
+	} else if onBoundarySearcher != nil {
+		return onBoundarySearcher, nil
+	} else if notOnBoundarySearcher != nil {
+		return notOnBoundarySearcher, nil
+	}
+
+	return NewMatchNoneSearcher(indexReader)
+}
+
+var geoMaxShift = document.GeoPrecisionStep * 4
+var geoDetailLevel = ((geo.GeoBits << 1) - geoMaxShift) / 2
+
+func ComputeGeoRange(term uint64, shift uint,
+	sminLon, sminLat, smaxLon, smaxLat float64,
+	checkBoundaries bool) (
+	onBoundary [][]byte, notOnBoundary [][]byte) {
+	split := term | uint64(0x1)<<shift
+	var upperMax uint64
+	if shift < 63 {
+		upperMax = term | ((uint64(1) << (shift + 1)) - 1)
+	} else {
+		upperMax = 0xffffffffffffffff
+	}
+	lowerMax := split - 1
+	onBoundary, notOnBoundary = relateAndRecurse(term, lowerMax, shift,
+		sminLon, sminLat, smaxLon, smaxLat, checkBoundaries)
+	plusOnBoundary, plusNotOnBoundary := relateAndRecurse(split, upperMax, shift,
+		sminLon, sminLat, smaxLon, smaxLat, checkBoundaries)
+	onBoundary = append(onBoundary, plusOnBoundary...)
+	notOnBoundary = append(notOnBoundary, plusNotOnBoundary...)
+	return
+}
+
+func relateAndRecurse(start, end uint64, res uint,
+	sminLon, sminLat, smaxLon, smaxLat float64,
+	checkBoundaries bool) (
+	onBoundary [][]byte, notOnBoundary [][]byte) {
+	minLon := geo.MortonUnhashLon(start)
+	minLat := geo.MortonUnhashLat(start)
+	maxLon := geo.MortonUnhashLon(end)
+	maxLat := geo.MortonUnhashLat(end)
+
+	level := ((geo.GeoBits << 1) - res) >> 1
+
+	within := res%document.GeoPrecisionStep == 0 &&
+		geo.RectWithin(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat)
+	if within || (level == geoDetailLevel &&
+		geo.RectIntersects(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat)) {
+		if !within && checkBoundaries {
+			return [][]byte{
+				numeric.MustNewPrefixCodedInt64(int64(start), res),
+			}, nil
+		}
+		return nil,
+			[][]byte{
+				numeric.MustNewPrefixCodedInt64(int64(start), res),
+			}
+	} else if level < geoDetailLevel &&
+		geo.RectIntersects(minLon, minLat, maxLon, maxLat,
+			sminLon, sminLat, smaxLon, smaxLat) {
+		return ComputeGeoRange(start, res-1, sminLon, sminLat, smaxLon, smaxLat,
+			checkBoundaries)
+	}
+	return nil, nil
+}
+
+func buildRectFilter(indexReader index.IndexReader, field string,
+	minLon, minLat, maxLon, maxLat float64) FilterFunc {
+	return func(d *search.DocumentMatch) bool {
+		var lon, lat float64
+		var found bool
+		err := indexReader.DocumentVisitFieldTerms(d.IndexInternalID,
+			[]string{field}, func(field string, term []byte) {
+				// only consider the values which are shifted 0
+				prefixCoded := numeric.PrefixCoded(term)
+				shift, err := prefixCoded.Shift()
+				if err == nil && shift == 0 {
+					var i64 int64
+					i64, err = prefixCoded.Int64()
+					if err == nil {
+						lon = geo.MortonUnhashLon(uint64(i64))
+						lat = geo.MortonUnhashLat(uint64(i64))
+						found = true
+					}
+				}
+			})
+		if err == nil && found {
+			return geo.BoundingBoxContains(lon, lat,
+				minLon, minLat, maxLon, maxLat)
+		}
+		return false
+	}
+}

vendor/github.com/blevesearch/bleve/search/searcher/search_geopointdistance.go

@@ -0,0 +1,117 @@
+//  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 searcher
+
+import (
+	"github.com/blevesearch/bleve/geo"
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/numeric"
+	"github.com/blevesearch/bleve/search"
+)
+
+func NewGeoPointDistanceSearcher(indexReader index.IndexReader, centerLon,
+	centerLat, dist float64, field string, boost float64,
+	options search.SearcherOptions) (search.Searcher, error) {
+	// compute bounding box containing the circle
+	topLeftLon, topLeftLat, bottomRightLon, bottomRightLat, err :=
+		geo.RectFromPointDistance(centerLon, centerLat, dist)
+	if err != nil {
+		return nil, err
+	}
+
+	// build a searcher for the box
+	boxSearcher, err := boxSearcher(indexReader,
+		topLeftLon, topLeftLat, bottomRightLon, bottomRightLat,
+		field, boost, options)
+	if err != nil {
+		return nil, err
+	}
+
+	// wrap it in a filtering searcher which checks the actual distance
+	return NewFilteringSearcher(boxSearcher,
+		buildDistFilter(indexReader, field, centerLon, centerLat, dist)), nil
+}
+
+// boxSearcher builds a searcher for the described bounding box
+// if the desired box crosses the dateline, it is automatically split into
+// two boxes joined through a disjunction searcher
+func boxSearcher(indexReader index.IndexReader,
+	topLeftLon, topLeftLat, bottomRightLon, bottomRightLat float64,
+	field string, boost float64, options search.SearcherOptions) (
+	search.Searcher, error) {
+	if bottomRightLon < topLeftLon {
+		// cross date line, rewrite as two parts
+
+		leftSearcher, err := NewGeoBoundingBoxSearcher(indexReader,
+			-180, bottomRightLat, bottomRightLon, topLeftLat,
+			field, boost, options, false)
+		if err != nil {
+			return nil, err
+		}
+		rightSearcher, err := NewGeoBoundingBoxSearcher(indexReader,
+			topLeftLon, bottomRightLat, 180, topLeftLat, field, boost, options, false)
+		if err != nil {
+			_ = leftSearcher.Close()
+			return nil, err
+		}
+
+		boxSearcher, err := NewDisjunctionSearcher(indexReader,
+			[]search.Searcher{leftSearcher, rightSearcher}, 0, options)
+		if err != nil {
+			_ = leftSearcher.Close()
+			_ = rightSearcher.Close()
+			return nil, err
+		}
+		return boxSearcher, nil
+	}
+
+	// build geoboundinggox searcher for that bounding box
+	boxSearcher, err := NewGeoBoundingBoxSearcher(indexReader,
+		topLeftLon, bottomRightLat, bottomRightLon, topLeftLat, field, boost,
+		options, false)
+	if err != nil {
+		return nil, err
+	}
+	return boxSearcher, nil
+}
+
+func buildDistFilter(indexReader index.IndexReader, field string,
+	centerLon, centerLat, maxDist float64) FilterFunc {
+	return func(d *search.DocumentMatch) bool {
+		var lon, lat float64
+		var found bool
+		err := indexReader.DocumentVisitFieldTerms(d.IndexInternalID,
+			[]string{field}, func(field string, term []byte) {
+				// only consider the values which are shifted 0
+				prefixCoded := numeric.PrefixCoded(term)
+				shift, err := prefixCoded.Shift()
+				if err == nil && shift == 0 {
+					i64, err := prefixCoded.Int64()
+					if err == nil {
+						lon = geo.MortonUnhashLon(uint64(i64))
+						lat = geo.MortonUnhashLat(uint64(i64))
+						found = true
+					}
+				}
+			})
+		if err == nil && found {
+			dist := geo.Haversin(lon, lat, centerLon, centerLat)
+			if dist <= maxDist/1000 {
+				return true
+			}
+		}
+		return false
+	}
+}

vendor/github.com/blevesearch/bleve/search/searcher/search_match_all.go

@@ -27,7 +27,7 @@ type MatchAllSearcher struct {
 	count       uint64
 }
 
-func NewMatchAllSearcher(indexReader index.IndexReader, boost float64, explain bool) (*MatchAllSearcher, error) {
+func NewMatchAllSearcher(indexReader index.IndexReader, boost float64, options search.SearcherOptions) (*MatchAllSearcher, error) {
 	reader, err := indexReader.DocIDReaderAll()
 	if err != nil {
 		return nil, err
@@ -37,7 +37,7 @@ func NewMatchAllSearcher(indexReader index.IndexReader, boost float64, explain b
 		_ = reader.Close()
 		return nil, err
 	}
-	scorer := scorer.NewConstantScorer(1.0, boost, explain)
+	scorer := scorer.NewConstantScorer(1.0, boost, options)
 	return &MatchAllSearcher{
 		indexReader: indexReader,
 		reader:      reader,

vendor/github.com/blevesearch/bleve/search/searcher/search_multi_term.go

@@ -0,0 +1,85 @@
+//  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 searcher
+
+import (
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/search"
+)
+
+func NewMultiTermSearcher(indexReader index.IndexReader, terms []string,
+	field string, boost float64, options search.SearcherOptions, limit bool) (
+	search.Searcher, error) {
+	qsearchers := make([]search.Searcher, len(terms))
+	qsearchersClose := func() {
+		for _, searcher := range qsearchers {
+			if searcher != nil {
+				_ = searcher.Close()
+			}
+		}
+	}
+	for i, term := range terms {
+		var err error
+		qsearchers[i], err = NewTermSearcher(indexReader, term, field, boost, options)
+		if err != nil {
+			qsearchersClose()
+			return nil, err
+		}
+	}
+	// build disjunction searcher of these ranges
+	return newMultiTermSearcherBytes(indexReader, qsearchers, field, boost,
+		options, limit)
+}
+
+func NewMultiTermSearcherBytes(indexReader index.IndexReader, terms [][]byte,
+	field string, boost float64, options search.SearcherOptions, limit bool) (
+	search.Searcher, error) {
+	qsearchers := make([]search.Searcher, len(terms))
+	qsearchersClose := func() {
+		for _, searcher := range qsearchers {
+			if searcher != nil {
+				_ = searcher.Close()
+			}
+		}
+	}
+	for i, term := range terms {
+		var err error
+		qsearchers[i], err = NewTermSearcherBytes(indexReader, term, field, boost, options)
+		if err != nil {
+			qsearchersClose()
+			return nil, err
+		}
+	}
+	return newMultiTermSearcherBytes(indexReader, qsearchers, field, boost,
+		options, limit)
+}
+
+func newMultiTermSearcherBytes(indexReader index.IndexReader,
+	searchers []search.Searcher, field string, boost float64,
+	options search.SearcherOptions, limit bool) (
+	search.Searcher, error) {
+
+	// build disjunction searcher of these ranges
+	searcher, err := newDisjunctionSearcher(indexReader, searchers, 0, options,
+		limit)
+	if err != nil {
+		for _, s := range searchers {
+			_ = s.Close()
+		}
+		return nil, err
+	}
+
+	return searcher, nil
+}

vendor/github.com/blevesearch/bleve/search/searcher/search_numeric_range.go

@@ -17,22 +17,16 @@ package searcher
 import (
 	"bytes"
 	"math"
+	"sort"
 
 	"github.com/blevesearch/bleve/index"
 	"github.com/blevesearch/bleve/numeric"
 	"github.com/blevesearch/bleve/search"
 )
 
-type NumericRangeSearcher struct {
-	indexReader index.IndexReader
-	min         *float64
-	max         *float64
-	field       string
-	explain     bool
-	searcher    *DisjunctionSearcher
-}
-
-func NewNumericRangeSearcher(indexReader index.IndexReader, min *float64, max *float64, inclusiveMin, inclusiveMax *bool, field string, boost float64, explain bool) (*NumericRangeSearcher, error) {
+func NewNumericRangeSearcher(indexReader index.IndexReader,
+	min *float64, max *float64, inclusiveMin, inclusiveMax *bool, field string,
+	boost float64, options search.SearcherOptions) (search.Searcher, error) {
 	// account for unbounded edges
 	if min == nil {
 		negInf := math.Inf(-1)
@@ -62,64 +56,49 @@ func NewNumericRangeSearcher(indexReader index.IndexReader, min *float64, max *f
 	// FIXME hard-coded precision, should match field declaration
 	termRanges := splitInt64Range(minInt64, maxInt64, 4)
 	terms := termRanges.Enumerate()
+	if len(terms) < 1 {
+		// cannot return MatchNoneSearcher because of interaction with
+		// commit f391b991c20f02681bacd197afc6d8aed444e132
+		return NewMultiTermSearcherBytes(indexReader, terms, field, boost, options,
+			true)
+	}
+	var err error
+	terms, err = filterCandidateTerms(indexReader, terms, field)
+	if err != nil {
+		return nil, err
+	}
 	if tooManyClauses(len(terms)) {
 		return nil, tooManyClausesErr()
 	}
-	// enumerate all the terms in the range
-	qsearchers := make([]search.Searcher, len(terms))
-	qsearchersClose := func() {
-		for _, searcher := range qsearchers {
-			if searcher != nil {
-				_ = searcher.Close()
-			}
-		}
-	}
-	for i, term := range terms {
-		var err error
-		qsearchers[i], err = NewTermSearcher(indexReader, string(term), field, boost, explain)
-		if err != nil {
-			qsearchersClose()
-			return nil, err
-		}
-	}
-	// build disjunction searcher of these ranges
-	searcher, err := NewDisjunctionSearcher(indexReader, qsearchers, 0, explain)
+
+	return NewMultiTermSearcherBytes(indexReader, terms, field, boost, options,
+		true)
+}
+
+func filterCandidateTerms(indexReader index.IndexReader,
+	terms [][]byte, field string) (rv [][]byte, err error) {
+	fieldDict, err := indexReader.FieldDictRange(field, terms[0], terms[len(terms)-1])
 	if err != nil {
-		qsearchersClose()
 		return nil, err
 	}
-	return &NumericRangeSearcher{
-		indexReader: indexReader,
-		min:         min,
-		max:         max,
-		field:       field,
-		explain:     explain,
-		searcher:    searcher,
-	}, nil
-}
 
-func (s *NumericRangeSearcher) Count() uint64 {
-	return s.searcher.Count()
-}
+	// enumerate the terms and check against list of terms
+	tfd, err := fieldDict.Next()
+	for err == nil && tfd != nil {
+		termBytes := []byte(tfd.Term)
+		i := sort.Search(len(terms), func(i int) bool { return bytes.Compare(terms[i], termBytes) >= 0 })
+		if i < len(terms) && bytes.Compare(terms[i], termBytes) == 0 {
+			rv = append(rv, terms[i])
+		}
+		terms = terms[i:]
+		tfd, err = fieldDict.Next()
+	}
 
-func (s *NumericRangeSearcher) Weight() float64 {
-	return s.searcher.Weight()
-}
+	if cerr := fieldDict.Close(); cerr != nil && err == nil {
+		err = cerr
+	}
 
-func (s *NumericRangeSearcher) SetQueryNorm(qnorm float64) {
-	s.searcher.SetQueryNorm(qnorm)
-}
-
-func (s *NumericRangeSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
-	return s.searcher.Next(ctx)
-}
-
-func (s *NumericRangeSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
-	return s.searcher.Advance(ctx, ID)
-}
-
-func (s *NumericRangeSearcher) Close() error {
-	return s.searcher.Close()
+	return rv, err
 }
 
 type termRange struct {
@@ -190,7 +169,8 @@ func splitInt64Range(minBound, maxBound int64, precisionStep uint) termRanges {
 		lowerWrapped := nextMinBound < minBound
 		upperWrapped := nextMaxBound > maxBound
 
-		if shift+precisionStep >= 64 || nextMinBound > nextMaxBound || lowerWrapped || upperWrapped {
+		if shift+precisionStep >= 64 || nextMinBound > nextMaxBound ||
+			lowerWrapped || upperWrapped {
 			// We are in the lowest precision or the next precision is not available.
 			rv = append(rv, newRange(minBound, maxBound, shift))
 			// exit the split recursion loop
@@ -225,11 +205,3 @@ func newRangeBytes(minBytes, maxBytes []byte) *termRange {
 		endTerm:   maxBytes,
 	}
 }
-
-func (s *NumericRangeSearcher) Min() int {
-	return 0
-}
-
-func (s *NumericRangeSearcher) DocumentMatchPoolSize() int {
-	return s.searcher.DocumentMatchPoolSize()
-}

vendor/github.com/blevesearch/bleve/search/searcher/search_phrase.go

@@ -15,6 +15,7 @@
 package searcher
 
 import (
+	"fmt"
 	"math"
 
 	"github.com/blevesearch/bleve/index"
@@ -27,11 +28,72 @@ type PhraseSearcher struct {
 	queryNorm    float64
 	currMust     *search.DocumentMatch
 	slop         int
-	terms        []string
+	terms        [][]string
 	initialized  bool
 }
 
-func NewPhraseSearcher(indexReader index.IndexReader, mustSearcher *ConjunctionSearcher, terms []string) (*PhraseSearcher, error) {
+func NewPhraseSearcher(indexReader index.IndexReader, terms []string, field string, options search.SearcherOptions) (*PhraseSearcher, error) {
+	// turn flat terms []string into [][]string
+	mterms := make([][]string, len(terms))
+	for i, term := range terms {
+		mterms[i] = []string{term}
+	}
+	return NewMultiPhraseSearcher(indexReader, mterms, field, options)
+}
+
+func NewMultiPhraseSearcher(indexReader index.IndexReader, terms [][]string, field string, options search.SearcherOptions) (*PhraseSearcher, error) {
+	options.IncludeTermVectors = true
+	var termPositionSearchers []search.Searcher
+	for _, termPos := range terms {
+		if len(termPos) == 1 && termPos[0] != "" {
+			// single term
+			ts, err := NewTermSearcher(indexReader, termPos[0], field, 1.0, options)
+			if err != nil {
+				// close any searchers already opened
+				for _, ts := range termPositionSearchers {
+					_ = ts.Close()
+				}
+				return nil, fmt.Errorf("phrase searcher error building term searcher: %v", err)
+			}
+			termPositionSearchers = append(termPositionSearchers, ts)
+		} else if len(termPos) > 1 {
+			// multiple terms
+			var termSearchers []search.Searcher
+			for _, term := range termPos {
+				if term == "" {
+					continue
+				}
+				ts, err := NewTermSearcher(indexReader, term, field, 1.0, options)
+				if err != nil {
+					// close any searchers already opened
+					for _, ts := range termPositionSearchers {
+						_ = ts.Close()
+					}
+					return nil, fmt.Errorf("phrase searcher error building term searcher: %v", err)
+				}
+				termSearchers = append(termSearchers, ts)
+			}
+			disjunction, err := NewDisjunctionSearcher(indexReader, termSearchers, 1, options)
+			if err != nil {
+				// close any searchers already opened
+				for _, ts := range termPositionSearchers {
+					_ = ts.Close()
+				}
+				return nil, fmt.Errorf("phrase searcher error building term position disjunction searcher: %v", err)
+			}
+			termPositionSearchers = append(termPositionSearchers, disjunction)
+		}
+	}
+
+	mustSearcher, err := NewConjunctionSearcher(indexReader, termPositionSearchers, options)
+	if err != nil {
+		// close any searchers already opened
+		for _, ts := range termPositionSearchers {
+			_ = ts.Close()
+		}
+		return nil, fmt.Errorf("phrase searcher error building conjunction searcher: %v", err)
+	}
+
 	// build our searcher
 	rv := PhraseSearcher{
 		indexReader:  indexReader,
@@ -96,68 +158,150 @@ func (s *PhraseSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch,
 		}
 	}
 
-	var rv *search.DocumentMatch
 	for s.currMust != nil {
-		rvftlm := make(search.FieldTermLocationMap, 0)
-		freq := 0
-		firstTerm := s.terms[0]
-		for field, termLocMap := range s.currMust.Locations {
-			rvtlm := make(search.TermLocationMap, 0)
-			locations, ok := termLocMap[firstTerm]
-			if ok {
-			OUTER:
-				for _, location := range locations {
-					crvtlm := make(search.TermLocationMap, 0)
-				INNER:
-					for i := 0; i < len(s.terms); i++ {
-						nextTerm := s.terms[i]
-						if nextTerm != "" {
-							// look through all these term locations
-							// to try and find the correct offsets
-							nextLocations, ok := termLocMap[nextTerm]
-							if ok {
-								for _, nextLocation := range nextLocations {
-									if nextLocation.Pos == location.Pos+float64(i) && nextLocation.SameArrayElement(location) {
-										// found a location match for this term
-										crvtlm.AddLocation(nextTerm, nextLocation)
-										continue INNER
-									}
-								}
-								// if we got here we didn't find a location match for this term
-								continue OUTER
-							} else {
-								continue OUTER
-							}
-						}
-					}
-					// if we got here all the terms matched
-					freq++
-					search.MergeTermLocationMaps(rvtlm, crvtlm)
-					rvftlm[field] = rvtlm
-				}
-			}
-		}
-
-		if freq > 0 {
-			// return match
-			rv = s.currMust
-			rv.Locations = rvftlm
-			err := s.advanceNextMust(ctx)
-			if err != nil {
-				return nil, err
-			}
-			return rv, nil
-		}
+		// check this match against phrase constraints
+		rv := s.checkCurrMustMatch(ctx)
 
+		// prepare for next iteration (either loop or subsequent call to Next())
 		err := s.advanceNextMust(ctx)
 		if err != nil {
 			return nil, err
 		}
+
+		// if match satisfied phrase constraints return it as a hit
+		if rv != nil {
+			return rv, nil
+		}
 	}
 
 	return nil, nil
 }
 
+// checkCurrMustMatch is soley concerned with determining if the DocumentMatch
+// pointed to by s.currMust (which satisifies the pre-condition searcher)
+// also satisfies the phase constraints.  if so, it returns a DocumentMatch
+// for this document, otherwise nil
+func (s *PhraseSearcher) checkCurrMustMatch(ctx *search.SearchContext) *search.DocumentMatch {
+	rvftlm := make(search.FieldTermLocationMap, 0)
+	freq := 0
+	// typically we would expect there to only actually be results in
+	// one field, but we allow for this to not be the case
+	// but, we note that phrase constraints can only be satisfied within
+	// a single field, so we can check them each independently
+	for field, tlm := range s.currMust.Locations {
+
+		f, rvtlm := s.checkCurrMustMatchField(ctx, tlm)
+		if f > 0 {
+			freq += f
+			rvftlm[field] = rvtlm
+		}
+	}
+
+	if freq > 0 {
+		// return match
+		rv := s.currMust
+		rv.Locations = rvftlm
+		return rv
+	}
+
+	return nil
+}
+
+// checkCurrMustMatchField is soley concerned with determining if one particular
+// field within the currMust DocumentMatch Locations satisfies the phase
+// constraints (possibly more than once).  if so, the number of times it was
+// satisfied, and these locations are returned.  otherwise 0 and either
+// a nil or empty TermLocationMap
+func (s *PhraseSearcher) checkCurrMustMatchField(ctx *search.SearchContext, tlm search.TermLocationMap) (int, search.TermLocationMap) {
+	paths := findPhrasePaths(0, nil, s.terms, tlm, nil, 0)
+	rv := make(search.TermLocationMap, len(s.terms))
+	for _, p := range paths {
+		p.MergeInto(rv)
+	}
+	return len(paths), rv
+}
+
+type phrasePart struct {
+	term string
+	loc  *search.Location
+}
+
+type phrasePath []*phrasePart
+
+func (p phrasePath) MergeInto(in search.TermLocationMap) {
+	for _, pp := range p {
+		in[pp.term] = append(in[pp.term], pp.loc)
+	}
+}
+
+// findPhrasePaths is a function to identify phase matches from a set of known
+// term locations.  the implementation is recursive, so care must be taken
+// with arguments and return values.
+//
+// prev - the previous location, nil on first invocation
+// phraseTerms - slice containing the phrase terms themselves
+//               may contain empty string as placeholder (don't care)
+// tlm - the Term Location Map containing all relevant term locations
+// offset - the offset from the previous that this next term must match
+// p - the current path being explored (appended to in recursive calls)
+//     this is the primary state being built during the traversal
+//
+// returns slice of paths, or nil if invocation did not find any successul paths
+func findPhrasePaths(prevPos uint64, ap search.ArrayPositions, phraseTerms [][]string, tlm search.TermLocationMap, p phrasePath, remainingSlop int) []phrasePath {
+
+	// no more terms
+	if len(phraseTerms) < 1 {
+		return []phrasePath{p}
+	}
+
+	car := phraseTerms[0]
+	cdr := phraseTerms[1:]
+
+	// empty term is treated as match (continue)
+	if len(car) == 0 || (len(car) == 1 && car[0] == "") {
+		nextPos := prevPos + 1
+		if prevPos == 0 {
+			// if prevPos was 0, don't set it to 1 (as thats not a real abs pos)
+			nextPos = 0 // don't advance nextPos if prevPos was 0
+		}
+		return findPhrasePaths(nextPos, ap, cdr, tlm, p, remainingSlop)
+	}
+
+	var rv []phrasePath
+	// locations for this term
+	for _, carTerm := range car {
+		locations := tlm[carTerm]
+		for _, loc := range locations {
+			if prevPos != 0 && !loc.ArrayPositions.Equals(ap) {
+				// if the array positions are wrong, can't match, try next location
+				continue
+			}
+
+			// compute distance from previous phrase term
+			dist := 0
+			if prevPos != 0 {
+				dist = editDistance(prevPos+1, loc.Pos)
+			}
+
+			// if enough slop reamining, continue recursively
+			if prevPos == 0 || (remainingSlop-dist) >= 0 {
+				// this location works, add it to the path (but not for empty term)
+				px := append(p, &phrasePart{term: carTerm, loc: loc})
+				rv = append(rv, findPhrasePaths(loc.Pos, loc.ArrayPositions, cdr, tlm, px, remainingSlop-dist)...)
+			}
+		}
+	}
+	return rv
+}
+
+func editDistance(p1, p2 uint64) int {
+	dist := int(p1 - p2)
+	if dist < 0 {
+		return -dist
+	}
+	return dist
+}
+
 func (s *PhraseSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
 	if !s.initialized {
 		err := s.initSearchers(ctx)

vendor/github.com/blevesearch/bleve/search/searcher/search_regexp.go

@@ -21,7 +21,14 @@ import (
 	"github.com/blevesearch/bleve/search"
 )
 
-func NewRegexpSearcher(indexReader index.IndexReader, pattern *regexp.Regexp, field string, boost float64, explain bool) (search.Searcher, error) {
+// NewRegexpSearcher creates a searcher which will match documents that
+// contain terms which match the pattern regexp.  The match must be EXACT
+// matching the entire term.  The provided regexp SHOULD NOT start with ^
+// or end with $ as this can intefere with the implementation.  Separately,
+// matches will be checked to ensure they match the entire term.
+func NewRegexpSearcher(indexReader index.IndexReader, pattern *regexp.Regexp,
+	field string, boost float64, options search.SearcherOptions) (
+	search.Searcher, error) {
 
 	prefixTerm, complete := pattern.LiteralPrefix()
 	var candidateTerms []string
@@ -30,39 +37,19 @@ func NewRegexpSearcher(indexReader index.IndexReader, pattern *regexp.Regexp, fi
 		candidateTerms = []string{prefixTerm}
 	} else {
 		var err error
-		candidateTerms, err = findRegexpCandidateTerms(indexReader, pattern, field, prefixTerm)
+		candidateTerms, err = findRegexpCandidateTerms(indexReader, pattern, field,
+			prefixTerm)
 		if err != nil {
 			return nil, err
 		}
 	}
 
-	// enumerate all the terms in the range
-	qsearchers := make([]search.Searcher, 0, len(candidateTerms))
-	qsearchersClose := func() {
-		for _, searcher := range qsearchers {
-			_ = searcher.Close()
-		}
-	}
-	for _, cterm := range candidateTerms {
-		qsearcher, err := NewTermSearcher(indexReader, cterm, field, boost, explain)
-		if err != nil {
-			qsearchersClose()
-			return nil, err
-		}
-		qsearchers = append(qsearchers, qsearcher)
-	}
-
-	// build disjunction searcher of these ranges
-	searcher, err := NewDisjunctionSearcher(indexReader, qsearchers, 0, explain)
-	if err != nil {
-		qsearchersClose()
-		return nil, err
-	}
-
-	return searcher, err
+	return NewMultiTermSearcher(indexReader, candidateTerms, field, boost,
+		options, true)
 }
 
-func findRegexpCandidateTerms(indexReader index.IndexReader, pattern *regexp.Regexp, field, prefixTerm string) (rv []string, err error) {
+func findRegexpCandidateTerms(indexReader index.IndexReader,
+	pattern *regexp.Regexp, field, prefixTerm string) (rv []string, err error) {
 	rv = make([]string, 0)
 	var fieldDict index.FieldDict
 	if len(prefixTerm) > 0 {
@@ -79,7 +66,8 @@ func findRegexpCandidateTerms(indexReader index.IndexReader, pattern *regexp.Reg
 	// enumerate the terms and check against regexp
 	tfd, err := fieldDict.Next()
 	for err == nil && tfd != nil {
-		if pattern.MatchString(tfd.Term) {
+		matchPos := pattern.FindStringIndex(tfd.Term)
+		if matchPos != nil && matchPos[0] == 0 && matchPos[1] == len(tfd.Term) {
 			rv = append(rv, tfd.Term)
 			if tooManyClauses(len(rv)) {
 				return rv, tooManyClausesErr()

vendor/github.com/blevesearch/bleve/search/searcher/search_term.go

@@ -22,16 +22,13 @@ import (
 
 type TermSearcher struct {
 	indexReader index.IndexReader
-	term        string
-	field       string
 	reader      index.TermFieldReader
 	scorer      *scorer.TermQueryScorer
 	tfd         index.TermFieldDoc
-	explain     bool
 }
 
-func NewTermSearcher(indexReader index.IndexReader, term string, field string, boost float64, explain bool) (*TermSearcher, error) {
-	reader, err := indexReader.TermFieldReader([]byte(term), field, true, true, true)
+func NewTermSearcher(indexReader index.IndexReader, term string, field string, boost float64, options search.SearcherOptions) (*TermSearcher, error) {
+	reader, err := indexReader.TermFieldReader([]byte(term), field, true, true, options.IncludeTermVectors)
 	if err != nil {
 		return nil, err
 	}
@@ -40,12 +37,27 @@ func NewTermSearcher(indexReader index.IndexReader, term string, field string, b
 		_ = reader.Close()
 		return nil, err
 	}
-	scorer := scorer.NewTermQueryScorer(term, field, boost, count, reader.Count(), explain)
+	scorer := scorer.NewTermQueryScorer([]byte(term), field, boost, count, reader.Count(), options)
+	return &TermSearcher{
+		indexReader: indexReader,
+		reader:      reader,
+		scorer:      scorer,
+	}, nil
+}
+
+func NewTermSearcherBytes(indexReader index.IndexReader, term []byte, field string, boost float64, options search.SearcherOptions) (*TermSearcher, error) {
+	reader, err := indexReader.TermFieldReader(term, field, true, true, options.IncludeTermVectors)
+	if err != nil {
+		return nil, err
+	}
+	count, err := indexReader.DocCount()
+	if err != nil {
+		_ = reader.Close()
+		return nil, err
+	}
+	scorer := scorer.NewTermQueryScorer(term, field, boost, count, reader.Count(), options)
 	return &TermSearcher{
 		indexReader: indexReader,
-		term:        term,
-		field:       field,
-		explain:     explain,
 		reader:      reader,
 		scorer:      scorer,
 	}, nil

vendor/github.com/blevesearch/bleve/search/searcher/search_term_prefix.go

@@ -19,93 +19,21 @@ import (
 	"github.com/blevesearch/bleve/search"
 )
 
-type TermPrefixSearcher struct {
-	indexReader index.IndexReader
-	prefix      string
-	field       string
-	explain     bool
-	searcher    *DisjunctionSearcher
-}
-
-func NewTermPrefixSearcher(indexReader index.IndexReader, prefix string, field string, boost float64, explain bool) (*TermPrefixSearcher, error) {
+func NewTermPrefixSearcher(indexReader index.IndexReader, prefix string,
+	field string, boost float64, options search.SearcherOptions) (
+	search.Searcher, error) {
 	// find the terms with this prefix
 	fieldDict, err := indexReader.FieldDictPrefix(field, []byte(prefix))
 	if err != nil {
 		return nil, err
 	}
 
-	// enumerate all the terms in the range
-	qsearchers := make([]search.Searcher, 0, 25)
-	qsearchersClose := func() {
-		for _, searcher := range qsearchers {
-			_ = searcher.Close()
-		}
-	}
-
+	var terms []string
 	tfd, err := fieldDict.Next()
 	for err == nil && tfd != nil {
-		var qsearcher *TermSearcher
-		qsearcher, err = NewTermSearcher(indexReader, string(tfd.Term), field, 1.0, explain)
-		if err != nil {
-			qsearchersClose()
-			_ = fieldDict.Close()
-			return nil, err
-		}
-		qsearchers = append(qsearchers, qsearcher)
+		terms = append(terms, tfd.Term)
 		tfd, err = fieldDict.Next()
 	}
 
-	err = fieldDict.Close()
-	if err != nil {
-		qsearchersClose()
-		return nil, err
-	}
-
-	// build disjunction searcher of these ranges
-	searcher, err := NewDisjunctionSearcher(indexReader, qsearchers, 0, explain)
-	if err != nil {
-		qsearchersClose()
-		return nil, err
-	}
-
-	return &TermPrefixSearcher{
-		indexReader: indexReader,
-		prefix:      prefix,
-		field:       field,
-		explain:     explain,
-		searcher:    searcher,
-	}, nil
-}
-
-func (s *TermPrefixSearcher) Count() uint64 {
-	return s.searcher.Count()
-}
-
-func (s *TermPrefixSearcher) Weight() float64 {
-	return s.searcher.Weight()
-}
-
-func (s *TermPrefixSearcher) SetQueryNorm(qnorm float64) {
-	s.searcher.SetQueryNorm(qnorm)
-}
-
-func (s *TermPrefixSearcher) Next(ctx *search.SearchContext) (*search.DocumentMatch, error) {
-	return s.searcher.Next(ctx)
-
-}
-
-func (s *TermPrefixSearcher) Advance(ctx *search.SearchContext, ID index.IndexInternalID) (*search.DocumentMatch, error) {
-	return s.searcher.Advance(ctx, ID)
-}
-
-func (s *TermPrefixSearcher) Close() error {
-	return s.searcher.Close()
-}
-
-func (s *TermPrefixSearcher) Min() int {
-	return 0
-}
-
-func (s *TermPrefixSearcher) DocumentMatchPoolSize() int {
-	return s.searcher.DocumentMatchPoolSize()
+	return NewMultiTermSearcher(indexReader, terms, field, boost, options, true)
 }

vendor/github.com/blevesearch/bleve/search/searcher/search_term_range.go

@@ -0,0 +1,79 @@
+//  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 searcher
+
+import (
+	"github.com/blevesearch/bleve/index"
+	"github.com/blevesearch/bleve/search"
+)
+
+func NewTermRangeSearcher(indexReader index.IndexReader,
+	min, max []byte, inclusiveMin, inclusiveMax *bool, field string,
+	boost float64, options search.SearcherOptions) (search.Searcher, error) {
+
+	if inclusiveMin == nil {
+		defaultInclusiveMin := true
+		inclusiveMin = &defaultInclusiveMin
+	}
+	if inclusiveMax == nil {
+		defaultInclusiveMax := false
+		inclusiveMax = &defaultInclusiveMax
+	}
+
+	if min == nil {
+		min = []byte{}
+	}
+
+	rangeMax := max
+	if rangeMax != nil {
+		// the term dictionary range end has an unfortunate implementation
+		rangeMax = append(rangeMax, 0)
+	}
+
+	// find the terms with this prefix
+	fieldDict, err := indexReader.FieldDictRange(field, min, rangeMax)
+	if err != nil {
+		return nil, err
+	}
+
+	var terms []string
+	tfd, err := fieldDict.Next()
+	for err == nil && tfd != nil {
+		terms = append(terms, tfd.Term)
+		tfd, err = fieldDict.Next()
+	}
+	if err != nil {
+		return nil, err
+	}
+
+	if len(terms) < 1 {
+		return NewMatchNoneSearcher(indexReader)
+	}
+
+	if !*inclusiveMin && min != nil && string(min) == terms[0] {
+		terms = terms[1:]
+		// check again, as we might have removed only entry
+		if len(terms) < 1 {
+			return NewMatchNoneSearcher(indexReader)
+		}
+	}
+
+	// if our term list included the max, it would be the last item
+	if !*inclusiveMax && max != nil && string(max) == terms[len(terms)-1] {
+		terms = terms[:len(terms)-1]
+	}
+
+	return NewMultiTermSearcher(indexReader, terms, field, boost, options, true)
+}

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

@@ -17,9 +17,11 @@ package search
 import (
 	"encoding/json"
 	"fmt"
+	"math"
 	"sort"
 	"strings"
 
+	"github.com/blevesearch/bleve/geo"
 	"github.com/blevesearch/bleve/numeric"
 )
 
@@ -27,12 +29,15 @@ var HighTerm = strings.Repeat(string([]byte{0xff}), 10)
 var LowTerm = string([]byte{0x00})
 
 type SearchSort interface {
+	UpdateVisitor(field string, term []byte)
 	Value(a *DocumentMatch) string
 	Descending() bool
 
 	RequiresDocID() bool
 	RequiresScoring() bool
 	RequiresFields() []string
+
+	Copy() SearchSort
 }
 
 func ParseSearchSortObj(input map[string]interface{}) (SearchSort, error) {
@@ -50,6 +55,31 @@ func ParseSearchSortObj(input map[string]interface{}) (SearchSort, error) {
 		return &SortScore{
 			Desc: descending,
 		}, nil
+	case "geo_distance":
+		field, ok := input["field"].(string)
+		if !ok {
+			return nil, fmt.Errorf("search sort mode geo_distance must specify field")
+		}
+		lon, lat, foundLocation := geo.ExtractGeoPoint(input["location"])
+		if !foundLocation {
+			return nil, fmt.Errorf("unable to parse geo_distance location")
+		}
+		rvd := &SortGeoDistance{
+			Field:    field,
+			Desc:     descending,
+			Lon:      lon,
+			Lat:      lat,
+			unitMult: 1.0,
+		}
+		if distUnit, ok := input["unit"].(string); ok {
+			var err error
+			rvd.unitMult, err = geo.ParseDistanceUnit(distUnit)
+			if err != nil {
+				return nil, err
+			}
+			rvd.Unit = distUnit
+		}
+		return rvd, nil
 	case "field":
 		field, ok := input["field"].(string)
 		if !ok {
@@ -171,6 +201,20 @@ func (so SortOrder) Value(doc *DocumentMatch) {
 	}
 }
 
+func (so SortOrder) UpdateVisitor(field string, term []byte) {
+	for _, soi := range so {
+		soi.UpdateVisitor(field, term)
+	}
+}
+
+func (so SortOrder) Copy() SortOrder {
+	rv := make(SortOrder, len(so))
+	for i, soi := range so {
+		rv[i] = soi.Copy()
+	}
+	return rv
+}
+
 // Compare will compare two document matches using the specified sort order
 // if both are numbers, we avoid converting back to term
 func (so SortOrder) Compare(cachedScoring, cachedDesc []bool, i, j *DocumentMatch) int {
@@ -300,13 +344,24 @@ type SortField struct {
 	Type    SortFieldType
 	Mode    SortFieldMode
 	Missing SortFieldMissing
+	values  []string
+}
+
+// UpdateVisitor notifies this sort field that in this document
+// this field has the specified term
+func (s *SortField) UpdateVisitor(field string, term []byte) {
+	if field == s.Field {
+		s.values = append(s.values, string(term))
+	}
 }
 
 // Value returns the sort value of the DocumentMatch
+// it also resets the state of this SortField for
+// processing the next document
 func (s *SortField) Value(i *DocumentMatch) string {
-	iTerms := i.CachedFieldTerms[s.Field]
-	iTerms = s.filterTermsByType(iTerms)
+	iTerms := s.filterTermsByType(s.values)
 	iTerm := s.filterTermsByMode(iTerms)
+	s.values = nil
 	return iTerm
 }
 
@@ -368,7 +423,7 @@ func (s *SortField) filterTermsByType(terms []string) []string {
 		for _, term := range terms {
 			valid, shift := numeric.ValidPrefixCodedTerm(term)
 			if valid && shift == 0 {
-				termsWithShiftZero = append(termsWithShiftZero)
+				termsWithShiftZero = append(termsWithShiftZero, term)
 			}
 		}
 		terms = termsWithShiftZero
@@ -430,11 +485,23 @@ func (s *SortField) MarshalJSON() ([]byte, error) {
 	return json.Marshal(sfm)
 }
 
+func (s *SortField) Copy() SearchSort {
+	var rv SortField
+	rv = *s
+	return &rv
+}
+
 // SortDocID will sort results by the document identifier
 type SortDocID struct {
 	Desc bool
 }
 
+// UpdateVisitor is a no-op for SortDocID as it's value
+// is not dependent on any field terms
+func (s *SortDocID) UpdateVisitor(field string, term []byte) {
+
+}
+
 // Value returns the sort value of the DocumentMatch
 func (s *SortDocID) Value(i *DocumentMatch) string {
 	return i.ID
@@ -461,11 +528,23 @@ func (s *SortDocID) MarshalJSON() ([]byte, error) {
 	return json.Marshal("_id")
 }
 
+func (s *SortDocID) Copy() SearchSort {
+	var rv SortDocID
+	rv = *s
+	return &rv
+}
+
 // SortScore will sort results by the document match score
 type SortScore struct {
 	Desc bool
 }
 
+// UpdateVisitor is a no-op for SortScore as it's value
+// is not dependent on any field terms
+func (s *SortScore) UpdateVisitor(field string, term []byte) {
+
+}
+
 // Value returns the sort value of the DocumentMatch
 func (s *SortScore) Value(i *DocumentMatch) string {
 	return "_score"
@@ -491,3 +570,142 @@ func (s *SortScore) MarshalJSON() ([]byte, error) {
 	}
 	return json.Marshal("_score")
 }
+
+func (s *SortScore) Copy() SearchSort {
+	var rv SortScore
+	rv = *s
+	return &rv
+}
+
+var maxDistance = string(numeric.MustNewPrefixCodedInt64(math.MaxInt64, 0))
+
+// NewSortGeoDistance creates SearchSort instance for sorting documents by
+// their distance from the specified point.
+func NewSortGeoDistance(field, unit string, lon, lat float64, desc bool) (
+	*SortGeoDistance, error) {
+
+	rv := &SortGeoDistance{
+		Field: field,
+		Desc:  desc,
+		Unit:  unit,
+		Lon:   lon,
+		Lat:   lat,
+	}
+	var err error
+	rv.unitMult, err = geo.ParseDistanceUnit(unit)
+	if err != nil {
+		return nil, err
+	}
+	return rv, nil
+}
+
+// SortGeoDistance will sort results by the distance of an
+// indexed geo point, from the provided location.
+//   Field is the name of the field
+//   Descending reverse the sort order (default false)
+type SortGeoDistance struct {
+	Field    string
+	Desc     bool
+	Unit     string
+	values   []string
+	Lon      float64
+	Lat      float64
+	unitMult float64
+}
+
+// UpdateVisitor notifies this sort field that in this document
+// this field has the specified term
+func (s *SortGeoDistance) UpdateVisitor(field string, term []byte) {
+	if field == s.Field {
+		s.values = append(s.values, string(term))
+	}
+}
+
+// Value returns the sort value of the DocumentMatch
+// it also resets the state of this SortField for
+// processing the next document
+func (s *SortGeoDistance) Value(i *DocumentMatch) string {
+	iTerms := s.filterTermsByType(s.values)
+	iTerm := s.filterTermsByMode(iTerms)
+	s.values = nil
+
+	if iTerm == "" {
+		return maxDistance
+	}
+
+	i64, err := numeric.PrefixCoded(iTerm).Int64()
+	if err != nil {
+		return maxDistance
+	}
+	docLon := geo.MortonUnhashLon(uint64(i64))
+	docLat := geo.MortonUnhashLat(uint64(i64))
+
+	dist := geo.Haversin(s.Lon, s.Lat, docLon, docLat)
+	// dist is returned in km, so convert to m
+	dist *= 1000
+	if s.unitMult != 0 {
+		dist /= s.unitMult
+	}
+	distInt64 := numeric.Float64ToInt64(dist)
+	return string(numeric.MustNewPrefixCodedInt64(distInt64, 0))
+}
+
+// Descending determines the order of the sort
+func (s *SortGeoDistance) Descending() bool {
+	return s.Desc
+}
+
+func (s *SortGeoDistance) filterTermsByMode(terms []string) string {
+	if len(terms) >= 1 {
+		return terms[0]
+	}
+
+	return ""
+}
+
+// filterTermsByType attempts to make one pass on the terms
+// return only valid prefix coded numbers with shift of 0
+func (s *SortGeoDistance) filterTermsByType(terms []string) []string {
+	var termsWithShiftZero []string
+	for _, term := range terms {
+		valid, shift := numeric.ValidPrefixCodedTerm(term)
+		if valid && shift == 0 {
+			termsWithShiftZero = append(termsWithShiftZero, term)
+		}
+	}
+	return termsWithShiftZero
+}
+
+// RequiresDocID says this SearchSort does not require the DocID be loaded
+func (s *SortGeoDistance) RequiresDocID() bool { return false }
+
+// RequiresScoring says this SearchStore does not require scoring
+func (s *SortGeoDistance) RequiresScoring() bool { return false }
+
+// RequiresFields says this SearchStore requires the specified stored field
+func (s *SortGeoDistance) RequiresFields() []string { return []string{s.Field} }
+
+func (s *SortGeoDistance) MarshalJSON() ([]byte, error) {
+	sfm := map[string]interface{}{
+		"by":    "geo_distance",
+		"field": s.Field,
+		"location": map[string]interface{}{
+			"lon": s.Lon,
+			"lat": s.Lat,
+		},
+	}
+	if s.Unit != "" {
+		sfm["unit"] = s.Unit
+	}
+	if s.Desc {
+		sfm["desc"] = true
+	}
+
+	return json.Marshal(sfm)
+}
+
+func (s *SortGeoDistance) Copy() SearchSort {
+	var rv SortGeoDistance
+	rv = *s
+	return &rv
+}