Package org.apache.calcite.rel

@DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=FIELD) @DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=PARAMETER) @DefaultQualifier(value=org.checkerframework.checker.nullness.qual.NonNull.class,locations=RETURN) package org.apache.calcite.rel

Defines relational expressions.

Related packages and classes

• Package org.apache.calcite.sql is an object model for SQL expressions
• Package org.apache.calcite.rex is an object model for relational row expressions
• Package org.apache.calcite.plan provides an optimizer interface.

Related Packages

Package	Description
org.apache.calcite	Main package for Calcite, the dynamic data management platform.
org.apache.calcite.rel.convert	Defines relational expressions and rules for converting between calling conventions.
org.apache.calcite.rel.core	Defines core relational expressions.
org.apache.calcite.rel.externalize	Facilities to externalize RelNodes to and from XML and JSON format.
org.apache.calcite.rel.hint	Defines hints interfaces and utilities for relational expressions.
org.apache.calcite.rel.logical	Defines logical relational expressions.
org.apache.calcite.rel.metadata	Defines metadata interfaces and utilities for relational expressions.
org.apache.calcite.rel.mutable	Defines mutable relational expressions.
org.apache.calcite.rel.rel2sql	Translates a relational expression to SQL parse tree.
org.apache.calcite.rel.rules	Provides a core set of planner rules.
org.apache.calcite.rel.stream	Defines relational expressions for streaming.
org.apache.calcite.rel.type	Defines a type system for relational expressions.

Class	Description
AbstractRelNode	Base class for every relational expression (RelNode).
BiRel	Abstract base class for relational expressions with a two inputs.
InvalidRelException	Exception that indicates that a relational expression would be invalid with given parameters.
PhysicalNode	Physical node in a planner that is capable of doing physical trait propagation and derivation.
RelCollation	Description of the physical ordering of a relational expression.
RelCollationImpl	Simple implementation of RelCollation.
RelCollations	Utilities concerning RelCollation and RelFieldCollation.
RelCollationTraitDef	Definition of the ordering trait.
RelCommonExpressionBasicSuggester	Suggester for common relational expressions that appear as is (identical trees) more than once in the query plan.
RelCommonExpressionSuggester	Suggester for finding and returning interesting expressions that appear more than once in a query.
RelDistribution	Description of the physical distribution of a relational expression.
RelDistribution.Type	Type of distribution.
RelDistributions	Utilities concerning RelDistribution.
RelDistributionTraitDef	Definition of the distribution trait.
RelFieldCollation	Definition of the ordering of one field of a RelNode whose output is to be sorted.
RelFieldCollation.Direction	Direction that a field is ordered in.
RelFieldCollation.NullDirection	Ordering of nulls.
RelHomogeneousShuttle	Visits all the relations in a homogeneous way: always redirects calls to accept(RelNode).
RelInput	Context from which a relational expression can initialize itself, reading from a serialized form of the relational expression.
RelNode	A RelNode is a relational expression.
RelNode.Context	Context of a relational expression, for purposes of checking validity.
RelNodes	Utilities concerning relational expressions.
RelReferentialConstraint	Interface for a referential constraint, i.e., Foreign-Key - Unique-Key relationship, between two tables.
RelReferentialConstraintImpl	RelOptReferentialConstraint base implementation.
RelRoot	Root of a tree of RelNode.
RelShuttle	Visitor that has methods for the common logical relational expressions.
RelShuttleImpl	Basic implementation of RelShuttle that calls RelNode.accept(RelShuttle) on each child, and RelNode.copy(org.apache.calcite.plan.RelTraitSet, java.util.List) if any children change.
RelValidityChecker	Visitor that checks that every RelNode in a tree is valid.
RelVisitor	A RelVisitor is a Visitor role in the visitor pattern and visits RelNode objects as the role of Element.
RelWriter	Callback for an expression to dump itself to.
SingleRel	Abstract base class for relational expressions with a single input.