Module optimizer 

Makes your queries faster without changing their meaning.

The optimizer transforms logical plans to run more efficiently:

Optimization	What it does
Filter Pushdown	Moves WHERE clauses closer to scans - filter early, process less
Join Reordering	Picks the best order to join tables using the DPccp algorithm
Predicate Simplification	Folds constants like 1 + 1 into 2

The optimizer uses CostModel and CardinalityEstimator to predict how expensive different plans are, then picks the cheapest.

Re-exports

pub use cardinality::CardinalityEstimator;

pub use cardinality::ColumnStats;

pub use cardinality::TableStats;

pub use cost::Cost;

pub use cost::CostModel;

pub use join_order::BitSet;

pub use join_order::DPccp;

pub use join_order::JoinGraph;

pub use join_order::JoinGraphBuilder;

pub use join_order::JoinPlan;

Modules

cardinality

Cardinality estimation for query optimization.

cost

Cost model for query optimization.

join_order

DPccp (Dynamic Programming with connected complement pairs) join ordering.

Structs

Optimizer

Transforms logical plans for faster execution.