Package org.apache.calcite.materialize

Management of materialized query results.

See: Description

Class Summary

Class	Description
Lattice	Structure that allows materialized views based upon a star schema to be recognized and recommended.
Lattice.Builder	Lattice builder.
Lattice.Column	Column in a lattice.
Lattice.Measure	Measure in a lattice.
Lattice.Node	Source relation of a lattice.
Lattice.Tile	Materialized aggregate within a lattice.
Lattice.TileBuilder	Tile builder.
MaterializationKey	Unique identifier for a materialization.
MaterializationService	Manages the collection of materialized tables known to the system, and the process by which they become valid and invalid.
TileKey	Definition of a particular combination of dimensions and measures of a lattice that is the basis of a materialization.
TileSuggester	Algorithm that suggests a set of initial tiles (materialized aggregate views) for a given lattice.

Package org.apache.calcite.materialize Description

Management of materialized query results.

An actor (MaterializationActor) maintains the state of all materializations in the system and is wrapped in a service (MaterializationService) for access from other parts of the system.

Optimizer rules allow Calcite to rewrite queries using materializations, if they are valid (that is, contain the same result as executing their defining query) and lower cost.

In future, the actor may manage the process of updating materializations, instantiating materializations from the intermediate results of queries, and recognize what materializations would be useful based on actual query load.