Package org.eigenbase.relopt

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

See:
Description

Interface Summary

RelImplementor	Callback used to hold state while converting a tree of relational expressions into a plan.
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.
RelOptListener	RelOptListener defines an interface for listening to events which occur during the optimization process.
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.
RelOptQuery.DeferredLookup	Contains the information necessary to repeat a call to SqlToRelConverter.Blackboard.lookup(int, org.eigenbase.sql2rel.SqlToRelConverter.LookupContext).
RelOptSchema	A RelOptSchema is a set of RelOptTable objects.
RelOptSchemaWithSampling	Extension to RelOptSchema with support for sample datasets.
RelOptTable	Represents a relational dataset in a RelOptSchema.
RelTrait	RelTrait represents the manifestation of a relational expression trait within a trait definition.

Class Summary

AbstractRelOptPlanner	AbstractRelOptPlanner is an abstract base for implementations of the RelOptPlanner interface.
CallingConvention	CallingConvention enumerates the calling conventions built in to the Saffron project.
CallingConventionTraitDef	CallingConventionTraitDef is a RelTraitDef that defines the calling-convention trait.
CallingConventionTraitDef.ConversionData
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.
MulticastRelOptListener	MulticastRelOptListener implements the RelOptListener interface by forwarding events on to a collection of other listeners.
RelOptAbstractTable	A RelOptAbstractTable is a partial implementation of RelOptTable.
RelOptCluster	A RelOptCluster is a collection of relational expressions which have the same environment.
RelOptCostImpl	RelOptCostImpl provides a default implementation for the RelOptCost interface.
RelOptListener.RelChosenEvent
RelOptListener.RelDiscardedEvent
RelOptListener.RelEquivalenceEvent
RelOptListener.RelEvent	Event class for abstract event dealing with a relational expression.
RelOptListener.RuleAttemptedEvent
RelOptListener.RuleEvent
RelOptListener.RuleProductionEvent
RelOptPlanWriter	Callback for an expression to dump itself to.
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	A RelOptRuleOperand determines whether a RelOptRule can be applied to a particular expression.
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
RelOptUtil.RexInputConverter	Walks an expression tree, converting the index of RexInputRefs based on some adjustment factor.
RelOptUtil.TypeDumper
RelOptUtil.VariableSetVisitor
RelOptUtil.VariableUsedVisitor
RelOptUtilTest	Unit test for RelOptUtil and other classes in this package.
RelOptXmlPlanWriter	Callback for a relational expression to dump in XML format.
RelTraitDef	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.
TableAccessMap	TableAccessMap represents the tables accessed by a query plan, with READ/WRITE information.
VisitorRelVisitor	Walks over a tree of relational expressions, walking a RexShuttle over every expression in that tree.

Enum Summary

RelOptRuleOperand.Dummy	Dummy type, containing a single value, for parameters to overloaded forms of the RelOptRuleOperand constructor signifying operands that will be matched by relational expressions with any number of children.
TableAccessMap.Mode

Package org.eigenbase.relopt Description

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

Revision	$Id: //open/dev/farrago/src/org/eigenbase/relopt/package.html#6 $
Copyright	Copyright (C) 2005-2009 The Eigenbase Project Copyright (C) 2004-2009 SQLstream, Inc. Copyright (C) 2005-2009 LucidEra, Inc.
Author	Julian Hyde