org.apache.calcite.rel.metadata

Class DefaultRelMetadataProvider

java.lang.Object

org.apache.calcite.rel.metadata.ChainedRelMetadataProvider

org.apache.calcite.rel.metadata.DefaultRelMetadataProvider

All Implemented Interfaces:

RelMetadataProvider

public class DefaultRelMetadataProvider
extends ChainedRelMetadataProvider

DefaultRelMetadataProvider supplies a default implementation of the RelMetadataProvider interface. It provides generic formulas and derivation rules for the standard logical algebra; coverage corresponds to the methods declared in RelMetadataQuery.

Constructor Summary

Constructors

Constructor and Description
DefaultRelMetadataProvider() Creates a new default provider.

Method Summary

Methods inherited from class org.apache.calcite.rel.metadata.ChainedRelMetadataProvider

apply, of

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

DefaultRelMetadataProvider

public DefaultRelMetadataProvider()

Creates a new default provider. This provider defines "catch-all" handlers for generic RelNodes, so it should always be given lowest priority when chaining.