Bluge
modern text indexing in go - blugelabs.com
Features
- Supported field types:
- Text, Numeric, Date, Geo Point
- Supported query types:
- Term, Phrase, Match, Match Phrase, Prefix
- Conjunction, Disjunction, Boolean
- Numeric Range, Date Range
- BM25 Similarity/Scoring with pluggable interfaces
- Search result match highlighting
- Extendable Aggregations:
- Bucketing
- Terms
- Numeric Range
- Date Range
- Metrics
- Min/Max/Count/Sum
- Avg/Weighted Avg
- Cardinality Estimation (HyperLogLog++)
- Quantile Approximation (T-Digest)
- Bucketing
Indexing
config := bluge.DefaultConfig(path)
writer, err := bluge.OpenWriter(config)
if err != nil {
log.Fatalf("error opening writer: %v", err)
}
defer writer.Close()
doc := bluge.NewDocument("example").
AddField(bluge.NewTextField("name", "bluge"))
err = writer.Update(doc.ID(), doc)
if err != nil {
log.Fatalf("error updating document: %v", err)
}
Querying
reader, err := writer.Reader()
if err != nil {
log.Fatalf("error getting index reader: %v", err)
}
defer reader.Close()
query := bluge.NewMatchQuery("bluge").SetField("name")
request := bluge.NewTopNSearch(10, query).
WithStandardAggregations()
documentMatchIterator, err := reader.Search(context.Background(), request)
if err != nil {
log.Fatalf("error executing search: %v", err)
}
match, err := documentMatchIterator.Next()
for err == nil && match != nil {
err = match.VisitStoredFields(func(field string, value []byte) bool {
if field == "_id" {
fmt.Printf("match: %s\n", string(value))
}
return true
})
if err != nil {
log.Fatalf("error loading stored fields: %v", err)
}
match, err = documentMatchIterator.Next()
}
if err != nil {
log.Fatalf("error iterator document matches: %v", err)
}
License
Apache License Version 2.0
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