Breaking API Changes

• rename ReloadPolicy onCommit to onCommitWithDelay #2235(@giovannicuccu)
• Move exports from the root into modules #2220(@PSeitz)
• Accept field name instead of Field in FilterCollector #2196(@PSeitz)
• remove deprecated IntOptions and DateTime #2353(@PSeitz)

Features/Improvements

• Tantivy documents as a trait: Index data directly without converting to tantivy types first #2071(@ChillFish8)

• encode some part of posting list as -1 instead of direct values (smaller inverted indices) #2185(@trinity-1686a)

• Aggregation

  • Support to deserialize f64 from string #2311(@PSeitz)
  • Add a top_hits aggregator #2198(@ditsuke)
  • Support bool type in term aggregation #2318(@PSeitz)
  • Support ip adresses in term aggregation #2319(@PSeitz)
  • Support date type in term aggregation #2172(@PSeitz)
  • Support escaped dot when addressing field #2250(@PSeitz)

• Add ExistsQuery to check documents that have a value #2160(@imotov)

• Expose TopDocs::order_by_u64_field again #2282(@ditsuke)

• Memory/Performance

  • Faster TopN: replace BinaryHeap with TopNComputer #2186(@PSeitz)
  • reduce number of allocations during indexing #2257(@PSeitz)
  • Less Memory while indexing: docid deltas while indexing #2249(@PSeitz)
  • Faster indexing: use term hashmap in fastfield #2243(@PSeitz)
  • term hashmap remove copy in is_empty, unused unordered_id #2229(@PSeitz)
  • add method to fetch block of first values in columnar #2330(@PSeitz)
  • Faster aggregations: add fast path for full columns in fetch_block #2328(@PSeitz)
  • Faster sstable loading: use fst for sstable index #2268(@trinity-1686a)

• QueryParser

  • allow newline where we allow space in query parser #2302(@trinity-1686a)
  • allow some mixing of occur and bool in strict query parser #2323(@trinity-1686a)
  • handle * inside term in lenient query parser #2228(@trinity-1686a)
  • add support for exists query syntax in query parser #2170(@trinity-1686a)

• Add shared search executor #2312(@MochiXu)

• Truncate keys to u16::MAX in term hashmap #2299(@PSeitz)

• report if a term matched when warming up posting list #2309(@trinity-1686a)

• Support json fields in FuzzyTermQuery #2173(@PingXia-at)

• Read list of fields encoded in term dictionary for JSON fields #2184(@PSeitz)

• add collect_block to BoxableSegmentCollector #2331(@PSeitz)

• expose collect_block buffer size #2326(@PSeitz)

• Forward regex parser errors #2288(@adamreichold)

• Make FacetCounts defaultable and cloneable. #2322(@adamreichold)

• Derive Debug for SchemaBuilder #2254(@GodTamIt)

• add missing inlines to tantivy options #2245(@PSeitz)

New Contributors

• @imotov made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2160
• @PingXia-at made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2173
• @giovannicuccu made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2235
• @BlackHoleFox made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2265
• @ditsuke made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2282
• @MochiXu made their first contribution in https://github.com/quickwit-oss/tantivy/pull/2312

Full Changelog: https://github.com/quickwit-oss/tantivy/compare/0.21...v0.22.0