org.apache.calcite.tools

Interface RelBuilderFactory

public interface RelBuilderFactory

A partially-created RelBuilder.

Add a cluster, and optionally a schema, when you want to create a builder.

A ProtoRelBuilder can be shared among queries, and thus can be inside a RelOptRule. It is a nice way to encapsulate the policy that this particular rule instance should create DrillFilter and DrillProject versus HiveFilter and HiveProject.

See Also:

RelFactories.LOGICAL_BUILDER

Method Summary

Modifier and Type	Method and Description
RelBuilder	create(RelOptCluster cluster, @Nullable RelOptSchema schema) Creates a RelBuilder.

Method Detail

create

RelBuilder create(RelOptCluster cluster,
                  @Nullable RelOptSchema schema)

Creates a RelBuilder.