Package 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
    Description
    static interface 
    BuiltInMetadata.NodeTypes.Handler
    Handler API.

  • Field Summary

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

  • Method Summary

    Modifier and Type
    Method
    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 Details

  • Method Details

    • 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.