Module optimizer

Expand description

Plan-native algebraic and cross-paradigm rewrites.

Structs§

OptimizerError: Errors raised while simplifying expressions or choosing a physical join order.

SourceStatistics: Cardinality and column statistics used to cost base relations during join enumeration. Engines implement this against their live catalogue; callers without a catalogue still get deterministic DPccp enumeration from the optimizer’s fallback cardinality.

contains_retrieval: Whether a scalar expression contains a posting-list retrieval operator. Relational executors use the same classification as access-path planning so registered retrieval calls never fall through to scalar evaluation.
optimize: Optimize a fully lowered plan using the built-in aggregate catalogue.
optimize_with_aggregates: Optimize a fully lowered plan while classifying engine-local aggregates.
optimize_with_aggregates_and_statistics: Optimize a fully lowered plan while classifying engine-local aggregates and costing join orders from the engine’s relation statistics.
optimize_with_statistics: Optimize a fully lowered plan with caller-provided relation statistics.
query_contains_implicit_hybrid_fusion: Return whether optimizing this query will introduce a fusion node that can persist Bayesian text calibration. This mirrors the rewrite’s source-aware qualifier policy before optimization changes the predicate.

ConstantEvaluator: Evaluate a planner-proven constant using the runtime selected by the caller.
OptimizerResult