7e36109b3c
This API (unexported) will estimate the amount of memory needed to execute
a search query over an index before the collector begins data collection.
Sample estimates for certain queries:
{Size: 10, BenchmarkUpsidedownSearchOverhead}
ESTIMATE BENCHMEM
TermQuery 4616 4796
MatchQuery 5210 5405
DisjunctionQuery (Match queries) 7700 8447
DisjunctionQuery (Term queries) 6514 6591
ConjunctionQuery (Match queries) 7524 8175
Nested disjunction query (disjunction of disjunctions) 10306 10708
…
112 lines
2.8 KiB
Go
112 lines
2.8 KiB
Go
// Copyright (c) 2017 Couchbase, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package segment
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import (
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"github.com/RoaringBitmap/roaring"
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"github.com/blevesearch/bleve/index"
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)
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// DocumentFieldValueVisitor defines a callback to be visited for each
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// stored field value. The return value determines if the visitor
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// should keep going. Returning true continues visiting, false stops.
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type DocumentFieldValueVisitor func(field string, typ byte, value []byte, pos []uint64) bool
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type Segment interface {
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Dictionary(field string) (TermDictionary, error)
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VisitDocument(num uint64, visitor DocumentFieldValueVisitor) error
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Count() uint64
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DocNumbers([]string) (*roaring.Bitmap, error)
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Fields() []string
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Close() error
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Size() int
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AddRef()
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DecRef() error
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}
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type TermDictionary interface {
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PostingsList(term string, except *roaring.Bitmap) (PostingsList, error)
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Iterator() DictionaryIterator
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PrefixIterator(prefix string) DictionaryIterator
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RangeIterator(start, end string) DictionaryIterator
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}
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type DictionaryIterator interface {
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Next() (*index.DictEntry, error)
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}
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type PostingsList interface {
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Iterator() PostingsIterator
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Size() int
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Count() uint64
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// NOTE deferred for future work
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// And(other PostingsList) PostingsList
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// Or(other PostingsList) PostingsList
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}
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type PostingsIterator interface {
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// The caller is responsible for copying whatever it needs from
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// the returned Posting instance before calling Next(), as some
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// implementations may return a shared instance to reduce memory
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// allocations.
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Next() (Posting, error)
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Size() int
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}
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type Posting interface {
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Number() uint64
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Frequency() uint64
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Norm() float64
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Locations() []Location
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Size() int
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}
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type Location interface {
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Field() string
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Start() uint64
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End() uint64
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Pos() uint64
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ArrayPositions() []uint64
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Size() int
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}
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// DocumentFieldTermVisitable is implemented by various scorch segment
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// implementations with persistence for the un inverting of the
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// postings or other indexed values.
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type DocumentFieldTermVisitable interface {
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VisitDocumentFieldTerms(localDocNum uint64, fields []string,
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visitor index.DocumentFieldTermVisitor) error
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// VisitableDocValueFields implementation should return
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// the list of fields which are document value persisted and
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// therefore visitable by the above VisitDocumentFieldTerms method.
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VisitableDocValueFields() ([]string, error)
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}
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