Adaptive plan optimizations

Примечание

Ниже приведена оригинальная документация Trino. Скоро мы ее переведем на русский язык и дополним полезными примерами.

Trino offers several adaptive plan optimizations that adjust query execution plans dynamically based on runtime statistics. These optimizations are only available when Fault-tolerant execution is enabled.

To deactivate all adaptive plan optimizations, set the fault-tolerant-execution-adaptive-query-planning-enabled configuration property to false. The equivalent session property is fault_tolerant_execution_adaptive_query_planning_enabled.

Adaptive reordering of partitioned joins

By default, Trino enables adaptive reordering of partitioned joins. This optimization allows Trino to dynamically reorder the join inputs, based on the actual size of the build and probe sides during query execution. This is particularly useful when table statistics are not available beforehand, as it can improve query performance by making more efficient join order decisions based on runtime information.

To deactivate this optimization, set the fault-tolerant-execution-adaptive-join-reordering-enabled configuration property to false. The equivalent session property is fault_tolerant_execution_adaptive_join_reordering_enabled.