Elasticsearch: v9.4.0 Release

1956 Commits in this Release

Ordered by the degree to which they evolved the repo in this version.

[ES|QL] Refactor inference operator architecture for multi-value field support (#139694)

Authored January 14, 2026

Failure store support for CCS (#139760)

Authored February 2, 2026

Reindexing replace scroll search with pit (#144339)

Authored April 2, 2026

Move mapper merging logic to Mapper.Builder (#142754)

Authored February 23, 2026

[ES|QL] Add schema reconciliation for multi-file external sources (#145220)

Authored March 31, 2026

ES|QL approximate query execution (#131828)

Authored January 28, 2026

ESQL: More explicit planning tests (#144515)

Authored March 20, 2026

[ES|QL] MMR Command - MMROperator and Execution (#141324)

Authored February 12, 2026

Add bulk-sparse native vector scoring for searchable snapshots via DirectAccessInput (#144557)

Authored March 25, 2026

Adding ES|QL command URI_PART (#140004)

Authored February 18, 2026

ES|QL: allow executing pre-built parsed statements (#144415)

Authored March 25, 2026

Various fixes to spatial functions (ST_ENVELOPE and ST_NPOINTS) (#139618)

Authored December 22, 2025

[ES|QL] Remove implicit `limit` appended to each subquery branch (#139058)

Authored January 14, 2026

[ES|QL] Take subquery out of snapshot (#144746)

Authored March 30, 2026

Add release notes for v9.3.0 release (#141228)

Authored February 3, 2026

Add batch indexing path for bulk index operations (#145155)

Authored April 3, 2026

Restrict RoutingAllocation construction (#144089)

Authored April 8, 2026

SPI based TemplateDecorator to modify xpack templates for stateless (#141426)

Authored February 10, 2026

Simple thread local store metric capture (#138790)

Authored February 11, 2026

Adding sparkline aggregate function (#141388)

Authored March 30, 2026

[ESQL] Add coordinator-only caching for external source metadata (#145300)

Authored April 1, 2026

Merge main22 source set into main in simdvec (#145005)

Authored March 27, 2026

Add `RequestParams` to handle repeated query parameters (#144506)

Authored March 30, 2026

Update View CRUD Actions to be Index Actions (#141570)

Authored February 16, 2026

ESQL: Add split SPI, partition detection, and filter hint extraction (#143005)

Authored February 25, 2026

ES|QL: Remove multi_match function (#144512)

Authored March 23, 2026

Revert "Ref-counting SearchHits from InternalTopHits to SearchRespone (#142732) (#144726)

Authored March 23, 2026

[PromQL] PromQL Translator Refactor (#144953)

Authored March 27, 2026

Consistently use ValidationException.throwIfValidationErrorsExist() (#144810)

Authored March 25, 2026

ESQL: introduce support for mapping-unavailable fields (#140463)

Authored January 12, 2026

[ML] Add support for nested NDJSON records in TextStructure endpoints (#141045)

Authored February 9, 2026

Adding ES|QL command REGISTERED_DOMAIN (#142680)

Authored February 23, 2026

[ES|QL] Better estimation on loading large text field from `_source` (#143105)

Authored February 27, 2026

refactor(tsdb): extract shared doc values base classes from ES819 (#144324)

Authored March 26, 2026

feat(tsdb): add pipeline runtime and rename stage interfaces (#145175)

Authored March 31, 2026

Move push expressions rule to physical planner (#144573)

Authored March 30, 2026

Add timeout support for KNN searches in the DFS phase (#142925)

Authored February 25, 2026

ESQL: Aggregate pushdown for external sources (COUNT, MIN, MAX) (#144828)

Authored March 27, 2026

[Native] BBQ Int4 to 1-bit dot product functions (#140264)

Authored January 21, 2026

Update semantic search CCS to support generic query vector builders (#142254)

Authored February 25, 2026