MaterializationActor (Calcite Core 1.16.0 API)

```
class MaterializationActor
extends Object
```
Actor that manages the state of materializations in the system.

Nested Classes
Modifier and Type	Class and Description
`(package private) static class`	`MaterializationActor.Materialization` A query materialized in a table, so that reading from the table gives the same results as executing the query.
`(package private) static class`	`MaterializationActor.QueryKey` A materialization can be re-used if it is the same SQL, on the same schema, with the same path for resolving functions.

Fields
Modifier and Type	Field and Description
`(package private) Map<MaterializationActor.QueryKey,MaterializationKey>`	`keyBySql`
`(package private) Map<TileKey,MaterializationKey>`	`keyByTile`
`(package private) Map<MaterializationKey,MaterializationActor.Materialization>`	`keyMap`
`(package private) com.google.common.collect.Multimap<TileKey,TileKey>`	`tilesByDimensionality` Tiles grouped by dimensionality.

Constructors
Constructor and Description
`MaterializationActor()`

Method Summary
- Methods inherited from class java.lang.Object
  clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

final Map<MaterializationKey,MaterializationActor.Materialization> keyMap

final Map<MaterializationActor.QueryKey,MaterializationKey> keyBySql

final Map<TileKey,MaterializationKey> keyByTile

tilesByDimensionality
```
final com.google.common.collect.Multimap<TileKey,TileKey> tilesByDimensionality
```
Tiles grouped by dimensionality. We use a TileKey with no measures to represent a dimensionality.

Class MaterializationActor