Package org.apache.calcite.plan

Defines interfaces for constructing rule-based optimizers of relational expressions.

See: Description

Interface Summary

Interface	Description
Context	Provides library users a way to store data within the planner session and access it within rules.
Convention	Calling convention trait.
RelImplementor	This is a marker interface for a callback used to convert a tree of relational expressions into a plan.
RelMultipleTrait	Trait for which a given relational expression can have multiple values.
RelOptConnection	The planner's view of a connection to a database.
RelOptCost	RelOptCost defines an interface for optimizer cost in terms of number of rows processed, CPU cost, and I/O cost.
RelOptCostFactory	Cost model for query planning.
RelOptListener	RelOptListener defines an interface for listening to events which occur during the optimization process.
RelOptNode	Node in a planner.
RelOptPlanner	A RelOptPlanner is a query optimizer: it transforms a relational expression into a semantically equivalent relational expression, according to a given set of rules and a cost model.
RelOptPlanner.Executor	Can reduce expressions, writing a literal for each into a list.
RelOptSchema	A RelOptSchema is a set of RelOptTable objects.
RelOptSchemaWithSampling	Extension to RelOptSchema with support for sample data-sets.
RelOptTable	Represents a relational dataset in a RelOptSchema.
RelOptTable.ToRelContext	Contains the context needed to convert a a table into a relational expression.
RelOptTable.ViewExpander	Can expand a view into relational expressions.
RelTrait	RelTrait represents the manifestation of a relational expression trait within a trait definition.

Class Summary

Class	Description
AbstractRelOptPlanner	Abstract base for implementations of the RelOptPlanner interface.
CommonRelSubExprRule	A CommonRelSubExprRule is an abstract base class for rules that are fired only on relational expressions that appear more than once in a query tree.
Contexts	Utilities for Context.
Convention.Impl	Default implementation.
ConventionTraitDef	Definition of the the convention trait.
MulticastRelOptListener	MulticastRelOptListener implements the RelOptListener interface by forwarding events on to a collection of other listeners.
RelOptAbstractTable	Partial implementation of RelOptTable.
RelOptCluster	An environment for related relational expressions during the optimization of a query.
RelOptCostImpl	RelOptCostImpl provides a default implementation for the RelOptCost interface.
RelOptLattice	Use of a lattice by the query optimizer.
RelOptListener.RelChosenEvent	Event indicating that a relational expression has been chosen.
RelOptListener.RelDiscardedEvent	Event indicating that a relational expression has been discarded.
RelOptListener.RelEquivalenceEvent	Event indicating that a relational expression has been found to be equivalent to an equivalence class.
RelOptListener.RelEvent	Event class for abstract event dealing with a relational expression.
RelOptListener.RuleAttemptedEvent	Event indicating that a planner rule has been attemptedd.
RelOptListener.RuleEvent	Event indicating that a planner rule has fired.
RelOptListener.RuleProductionEvent	Event indicating that a planner rule has produced a result.
RelOptMaterialization	Records that a particular query is materialized by a particular table.
RelOptPredicateList	Predicates that are known to hold in the output of a particular relational expression.
RelOptQuery	A RelOptQuery represents a set of relational expressions which derive from the same select statement.
RelOptRule	A RelOptRule transforms an expression into another.
RelOptRuleCall	A RelOptRuleCall is an invocation of a RelOptRule with a set of relational expressions as arguments.
RelOptRuleOperand	Operand that determines whether a RelOptRule can be applied to a particular expression.
RelOptRuleOperandChildren	Children of a RelOptRuleOperand and the policy for matching them.
RelOptSamplingParameters	RelOptSamplingParameters represents the parameters necessary to produce a sample of a relation.
RelOptUtil	RelOptUtil defines static utility methods for use in optimizing RelNodes.
RelOptUtil.InputFinder	Visitor which builds a bitmap of the inputs used by an expression.
RelOptUtil.InputReferencedVisitor	Shuttle that finds the set of inputs that are used.
RelOptUtil.RexInputConverter	Walks an expression tree, converting the index of RexInputRefs based on some adjustment factor.
RelOptUtil.TypeDumper	Converts types to descriptive strings.
RelOptUtil.VariableUsedVisitor	Visitor that finds all variables used in an expression.
RelTraitDef<T extends RelTrait>	RelTraitDef represents a class of RelTraits.
RelTraitPropagationVisitor	RelTraitPropagationVisitor traverses a RelNode and its unregistered children, making sure that each has a full complement of traits.
RelTraitSet	RelTraitSet represents an ordered set of RelTraits.
Strong	Utilities for strong predicates.
SubstitutionVisitor	Substitutes part of a tree of relational expressions with another tree.
SubstitutionVisitor.FilterOnProjectRule	Rule that converts a LogicalFilter on top of a LogicalProject into a trivial filter (on a boolean column).
TableAccessMap	TableAccessMap represents the tables accessed by a query plan, with READ/WRITE information.

Enum Summary

Enum	Description
RelOptRuleOperandChildPolicy	Policy by which operands will be matched by relational expressions with any number of children.
RelOptUtil.Logic	Policies for handling two- and three-valued boolean logic.
RelOptUtil.SubqueryType	What kind of sub-query.
TableAccessMap.Mode	Access mode.

Exception Summary

Exception	Description
RelOptPlanner.CannotPlanException	Thrown by RelOptPlanner.findBestExp().

Package org.apache.calcite.plan Description

Defines interfaces for constructing rule-based optimizers of relational expressions.