Module query_optimizer 

TensorQueryOptimizer — Rewrites TensorLogic query plans before execution.

Supported rules:

• OptimizationRule::PushFilterDown — hoist filter below join
• OptimizationRule::EliminateDeadProject — drop empty projection
• OptimizationRule::ReorderJoin — put cheaper side on left
• OptimizationRule::FoldConstantLimit — zero-row limit → empty scan
• OptimizationRule::FlattenNestedFilter — merge double filter

Structs

OptimizationResult

Summary of a single TensorQueryOptimizer::optimize call.

OptimizerStats

Lifetime statistics for a TensorQueryOptimizer instance.

TensorQueryOptimizer

Optimises TensorLogic query plans by repeatedly applying rewriting rules.

Enums

OptimizationRule

Rewriting rule that can be applied by TensorQueryOptimizer.

QueryNode

A node in a logical query plan.

Functions

estimated_cost

Recursively estimate the cost of executing node.