Class SingleRel

All Implemented Interfaces:
Cloneable, RelOptNode, RelNode
Direct Known Subclasses:
Aggregate, Calc, CassandraLimit, Chi, Collect, ConverterImpl, Delta, EnumerableInterpreter, EnumerableLimit, Exchange, Filter, JdbcRules.JdbcCalc, Match, Project, Sample, Snapshot, Sort, SparkRules.SparkCalc, Spool, TableModify, Uncollect, Window

public abstract class SingleRel extends AbstractRelNode
Abstract base class for relational expressions with a single input.

It is not required that single-input relational expressions use this class as a base class. However, default implementations of methods make life easier.