Package org.apache.calcite.materialize

@DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=FIELD) @DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=PARAMETER) @DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=RETURN) package org.apache.calcite.materialize

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.

Related Packages

Package	Description
org.apache.calcite	Main package for Calcite, the dynamic data management platform.

Class	Description
DelegatingLatticeStatisticProvider	Implementation of LatticeStatisticProvider that delegates to an underlying provider.
Lattice	Structure that allows materialized views based upon a star schema to be recognized and recommended.
Lattice.BaseColumn	Column in a lattice.
Lattice.Builder	Lattice builder.
Lattice.Column	Column in a lattice.
Lattice.DerivedColumn	Column in a lattice that is based upon a SQL expression.
Lattice.Measure	A measure within a Lattice.
Lattice.SqlWriter	The information necessary to convert a column to SQL.
Lattice.Tile	Materialized aggregate within a lattice.
Lattice.TileBuilder	Tile builder.
LatticeChildNode	Non-root node in a Lattice.
LatticeNode	Source relation of a lattice.
LatticeRootNode	Root node in a Lattice.
Lattices	Utilities for Lattice, LatticeStatisticProvider.
LatticeStatisticProvider	Estimates row counts for a lattice and its attributes.
LatticeStatisticProvider.Factory	Creates a LatticeStatisticProvider for a given Lattice.
LatticeSuggester	Algorithm that suggests a set of lattices.
LatticeTable	Table registered in the graph.
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.
MaterializationService.DefaultTableFactory	Default implementation of MaterializationService.TableFactory.
MaterializationService.TableFactory	Creates tables that represent a materialized view.
SqlStatisticProvider	Estimates row counts for tables and columns, and whether combinations of columns form primary/unique and foreign keys.
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.