org.apache.calcite.rel.metadata

Interface BuiltInMetadata.NodeTypes

All Superinterfaces:

Metadata

Enclosing class:

BuiltInMetadata

public static interface BuiltInMetadata.NodeTypes
extends Metadata

Metadata about the node types in a relational expression.

For each relational expression, it returns a multimap from the class to the nodes instantiating that class. Each node will appear in the multimap only once.

Nested Class Summary

Nested Classes

Modifier and Type	Interface and Description
static interface	BuiltInMetadata.NodeTypes.Handler Handler API.

Field Summary

Fields

Modifier and Type	Field and Description
static MetadataDef<BuiltInMetadata.NodeTypes>	DEF

Method Summary

Modifier and Type	Method and Description
@Nullable com.google.common.collect.Multimap<Class<? extends RelNode>,RelNode>	getNodeTypes() Returns a multimap from the class to the nodes instantiating that class.

Methods inherited from interface org.apache.calcite.rel.metadata.Metadata

rel

Field Detail

DEF

static final MetadataDef<BuiltInMetadata.NodeTypes> DEF

Method Detail

getNodeTypes

@Nullable com.google.common.collect.Multimap<Class<? extends RelNode>,RelNode> getNodeTypes()

Returns a multimap from the class to the nodes instantiating that class. The default implementation for a node classifies it as a RelNode.