Release notes

Upgraded to Elasticsearch 8.13.2

Improved the circuit-breaker mechanism for multi-conditional index joins. The circuit-breaker now triggers a failure when the limit of index lookup operations is exceeded at run-time, rather than relying on estimations done at the query planning phase.

Enhanced the failure message of the circuit-breaker mechanism for multi-conditional index joins, incorporating details on the reached limit and the count of remaining lookup operations.

Introduced an option to deactivate the circuit-breaker mechanism for multi-conditional index joins. This can be achieved by setting -1 in the federate.planner.index_join.max_lookups configuration setting.

Improved the error messages by removing the exception classes from the list of obfuscated classes.

Improved the cost model to select sorted set terms scan over index scan when we project only one column.

Added folding capabilities to AQP (Adaptive Query Planner) requests.

Introduced a federate_object runtime field to construct custom objects (map-like structures) to maintain correlation between field values from the same document.

Fixed a bug concerning missing bounds and multi-value columns.

Fixed a folding/cache bug in the multi-conditional and broadcast join that was causing a Data entry does not exist failure.

Fixed orphan thread executions when the REST channel is closed before finishing the request.

Fixed a missing-index error for an unavailable index when explicitly the ignore_unavailable parameter was set to true.

Fixed a performance regression issue caused by a fieldExists query for a runtime field used in a join.