Package org.apache.calcite.rel.rules

package org.apache.calcite.rel.rules

Provides a core set of planner rules.

Consider this package to be the "standard library" of planner rules. Most of the common rewrites that you would want to perform on logical relational expressions, or generically on any data source, are present, and have been well tested.

Of course, the library is never complete, and contributions are welcome.

Not present are rules specific to a particular data source: look in that data source's adapter.

Also out of the scope of this package are rules that support a particular operation, such as decorrelation or recognizing materialized views. Those are defined along with the algorithm.

For

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.rel	Defines relational expressions.
org.apache.calcite.rel.rules.materialize	Provides a materialized rewriting algorithm encapsulated within a planner rule.

Class	Description
AbstractJoinExtractFilterRule	Rule to convert an inner join to a filter on top of a cartesian inner join.
AbstractJoinExtractFilterRule.Config	Rule configuration.
AggregateCaseToFilterRule	Rule that converts CASE-style filtered aggregates into true filtered aggregates.
AggregateCaseToFilterRule.Config	Rule configuration.
AggregateExpandDistinctAggregatesRule	Planner rule that expands distinct aggregates (such as COUNT(DISTINCT x)) from a Aggregate.
AggregateExpandDistinctAggregatesRule.Config	Rule configuration.
AggregateExpandWithinDistinctRule	Planner rule that rewrites an Aggregate that contains WITHIN DISTINCT aggregate functions.
AggregateExpandWithinDistinctRule.Config	Rule configuration.
AggregateExtractProjectRule	Rule to extract a Project from an Aggregate and push it down towards the input.
AggregateExtractProjectRule.Config	Rule configuration.
AggregateFilterTransposeRule	Planner rule that matches an Aggregate on a Filter and transposes them, pushing the aggregate below the filter.
AggregateFilterTransposeRule.Config	Rule configuration.
AggregateJoinJoinRemoveRule	Planner rule that matches an Aggregate on a Join and removes the left input of the join provided that the left input is also a left join if possible.
AggregateJoinJoinRemoveRule.Config	Rule configuration.
AggregateJoinRemoveRule	Planner rule that matches an Aggregate on a Join and removes the join provided that the join is a left join or right join and it computes no aggregate functions or all the aggregate calls have distinct.
AggregateJoinRemoveRule.Config	Rule configuration.
AggregateJoinTransposeRule	Planner rule that pushes an Aggregate past a Join.
AggregateJoinTransposeRule.Config	Rule configuration.
AggregateMergeRule	Planner rule that matches an Aggregate on a Aggregate and the top aggregate's group key is a subset of the lower aggregate's group key, and the aggregates are expansions of rollups, then it would convert into a single aggregate.
AggregateMergeRule.Config	Rule configuration.
AggregateProjectConstantToDummyJoinRule	Planner rule that recognizes a Aggregate on top of a Project where the aggregate's group set contains literals (true, false, DATE, chars, etc), and removes the literals from the group keys by joining with a dummy table of literals.
AggregateProjectConstantToDummyJoinRule.Config	Rule configuration.
AggregateProjectMergeRule	Planner rule that recognizes a Aggregate on top of a Project and if possible aggregate through the project or removes the project.
AggregateProjectMergeRule.Config	Rule configuration.
AggregateProjectPullUpConstantsRule	Planner rule that removes constant keys from an Aggregate.
AggregateProjectPullUpConstantsRule.Config	Rule configuration.
AggregateProjectStarTableRule	Variant of AggregateStarTableRule that accepts a Project between the Aggregate and its StarTable.StarTableScan input.
AggregateProjectStarTableRule.Config	Rule configuration.
AggregateReduceFunctionsRule	Planner rule that reduces aggregate functions in Aggregates to simpler forms.
AggregateReduceFunctionsRule.Config	Rule configuration.
AggregateRemoveRule	Planner rule that removes a Aggregate if it computes no aggregate functions (that is, it is implementing SELECT DISTINCT), or all the aggregate functions are splittable, and the underlying relational expression is already distinct.
AggregateRemoveRule.Config	Rule configuration.
AggregateStarTableRule	Planner rule that matches an Aggregate on top of a StarTable.StarTableScan.
AggregateStarTableRule.Config	Rule configuration.
AggregateUnionAggregateRule	Planner rule that matches Aggregates beneath a Union and pulls them up, so that a single Aggregate removes duplicates.
AggregateUnionAggregateRule.Config	Rule configuration.
AggregateUnionTransposeRule	Planner rule that pushes an Aggregate past a non-distinct Union.
AggregateUnionTransposeRule.Config	Rule configuration.
AggregateValuesRule	Rule that applies Aggregate to a Values (currently just an empty Values).
AggregateValuesRule.Config	Rule configuration.
CalcMergeRule	Planner rule that merges a Calc onto a Calc.
CalcMergeRule.Config	Rule configuration.
CalcRelSplitter	CalcRelSplitter operates on a Calc with multiple RexCall sub-expressions that cannot all be implemented by a single concrete RelNode.
CalcRelSplitter.RelType	Type of relational expression.
CalcRemoveRule	Planner rule that removes a trivial LogicalCalc.
CalcRemoveRule.Config	Rule configuration.
CalcSplitRule	Planner rule that converts a Calc to a Project and Filter.
CalcSplitRule.Config	Rule configuration.
CoerceInputsRule	CoerceInputsRule pre-casts inputs to a particular type.
CoerceInputsRule.Config	Rule configuration.
CoreRules	Rules that perform logical transformations on relational expressions.
DateRangeRules	Collection of planner rules that convert EXTRACT(timeUnit FROM dateTime) = constant, FLOOR(dateTime to timeUnit = constant} and CEIL(dateTime to timeUnit = constant} to dateTime BETWEEN lower AND upper.
DateRangeRules.FilterDateRangeRule	Rule that converts EXTRACT, FLOOR and CEIL in a Filter into a date range.
DateRangeRules.FilterDateRangeRule.FilterDateRangeRuleConfig	Rule configuration.
EquiJoin	Deprecated. Use EquiJoin in 'core' package
ExchangeRemoveConstantKeysRule	Planner rule that removes keys from a Exchange if those keys are known to be constant.
ExchangeRemoveConstantKeysRule.Config	Rule configuration.
FilterAggregateTransposeRule	Planner rule that pushes a Filter past a Aggregate.
FilterAggregateTransposeRule.Config	Rule configuration.
FilterCalcMergeRule	Planner rule that merges a Filter and a Calc.
FilterCalcMergeRule.Config	Rule configuration.
FilterCorrelateRule	Planner rule that pushes a Filter above a Correlate into the inputs of the Correlate.
FilterCorrelateRule.Config	Rule configuration.
FilterFlattenCorrelatedConditionRule	Planner rule that matches a Filter expression with correlated variables, and rewrites the condition in a simpler form that is more convenient for the decorrelation logic.
FilterFlattenCorrelatedConditionRule.Config	Rule configuration.
FilterJoinRule<C extends FilterJoinRule.Config>	Planner rule that pushes filters above and within a join node into the join node and/or its children nodes.
FilterJoinRule.Config	Rule configuration.
FilterJoinRule.FilterIntoJoinRule	Rule that tries to push filter expressions into a join condition and into the inputs of the join.
FilterJoinRule.FilterIntoJoinRule.FilterIntoJoinRuleConfig	Rule configuration.
FilterJoinRule.JoinConditionPushRule	Rule that pushes parts of the join condition to its inputs.
FilterJoinRule.JoinConditionPushRule.JoinConditionPushRuleConfig	Rule configuration.
FilterJoinRule.Predicate	Predicate that returns whether a filter is valid in the ON clause of a join for this particular kind of join.
FilterMergeRule	Planner rule that combines two LogicalFilters.
FilterMergeRule.Config	Rule configuration.
FilterMultiJoinMergeRule	Planner rule that merges a Filter into a MultiJoin, creating a richer MultiJoin.
FilterMultiJoinMergeRule.Config	Rule configuration.
FilterProjectTransposeRule	Planner rule that pushes a Filter past a Project.
FilterProjectTransposeRule.Config	Rule configuration.
FilterRemoveIsNotDistinctFromRule	Planner rule that replaces IS NOT DISTINCT FROM in a Filter with logically equivalent operations.
FilterRemoveIsNotDistinctFromRule.Config	Rule configuration.
FilterSampleTransposeRule	Planner rule that pushes a Filter past a Sample.
FilterSampleTransposeRule.Config	Rule configuration.
FilterSetOpTransposeRule	Planner rule that pushes a Filter past a SetOp.
FilterSetOpTransposeRule.Config	Rule configuration.
FilterTableFunctionTransposeRule	Planner rule that pushes a LogicalFilter past a LogicalTableFunctionScan.
FilterTableFunctionTransposeRule.Config	Rule configuration.
FilterTableScanRule	Planner rule that converts a Filter on a TableScan of a FilterableTable or a ProjectableFilterableTable to a Bindables.BindableTableScan.
FilterTableScanRule.Config	Rule configuration.
FilterToCalcRule	Planner rule that converts a LogicalFilter to a LogicalCalc.
FilterToCalcRule.Config	Rule configuration.
FilterWindowTransposeRule	Planner rule that pushes a Filter past a Window.
FilterWindowTransposeRule.Config	Rule configuration.
IntersectToDistinctRule	Planner rule that translates a distinct Intersect (all = false) into a group of operators composed of Union, Aggregate, etc.
IntersectToDistinctRule.Config	Rule configuration.
JoinAddRedundantSemiJoinRule	Rule to add a semi-join into a join.
JoinAddRedundantSemiJoinRule.Config	Rule configuration.
JoinAssociateRule	Planner rule that changes a join based on the associativity rule.
JoinAssociateRule.Config	Rule configuration.
JoinCommuteRule	Planner rule that permutes the inputs to a Join.
JoinCommuteRule.Config	Rule configuration.
JoinDeriveIsNotNullFilterRule	Planner rule that derives IS NOT NULL predicates from a inner Join and creates Filters with those predicates as new inputs of the join.
JoinDeriveIsNotNullFilterRule.Config	Rule configuration.
JoinExtractFilterRule	Rule to convert an inner join to a filter on top of a cartesian inner join.
JoinExtractFilterRule.Config	Rule configuration.
JoinProjectTransposeRule	Planner rule that matches a Join one of whose inputs is a LogicalProject, and pulls the project up.
JoinProjectTransposeRule.Config	Rule configuration.
JoinPushExpressionsRule	Planner rule that pushes down expressions in "equal" join condition.
JoinPushExpressionsRule.Config	Rule configuration.
JoinPushThroughJoinRule	Rule that pushes the right input of a join into through the left input of the join, provided that the left input is also a join.
JoinPushThroughJoinRule.Config	Rule configuration.
JoinPushTransitivePredicatesRule	Planner rule that infers predicates from on a Join and creates Filters if those predicates can be pushed to its inputs.
JoinPushTransitivePredicatesRule.Config	Rule configuration.
JoinToCorrelateRule	Rule that converts a Join into a LogicalCorrelate, which can then be implemented using nested loops.
JoinToCorrelateRule.Config	Rule configuration.
JoinToMultiJoinRule	Planner rule to flatten a tree of LogicalJoins into a single MultiJoin with N inputs.
JoinToMultiJoinRule.Config	Rule configuration.
JoinUnionTransposeRule	Planner rule that pushes a Join past a non-distinct Union.
JoinUnionTransposeRule.Config	Rule configuration.
LoptJoinTree	Utility class used to store a Join tree and the factors that make up the tree.
LoptJoinTree.BinaryTree	Simple binary tree class that stores an id in the leaf nodes and keeps track of the parent LoptJoinTree object associated with the binary tree.
LoptJoinTree.Leaf	Binary tree node that has no children.
LoptJoinTree.Node	Binary tree node that has two children.
LoptMultiJoin	Utility class that keeps track of the join factors that make up a MultiJoin.
LoptOptimizeJoinRule	Planner rule that implements the heuristic planner for determining optimal join orderings.
LoptOptimizeJoinRule.Config	Rule configuration.
LoptSemiJoinOptimizer	Implements the logic for determining the optimal semi-joins to be used in processing joins in a query.
MatchRule	Planner rule that converts a LogicalMatch to the result of calling LogicalMatch.copy(org.apache.calcite.plan.RelTraitSet, java.util.List<org.apache.calcite.rel.RelNode>).
MatchRule.Config	Rule configuration.
MaterializedViewFilterScanRule	Planner rule that converts a Filter on a TableScan to a Filter on a Materialized View.
MaterializedViewFilterScanRule.Config	Rule configuration.
MinusToDistinctRule	Planner rule that translates a distinct Minus (all = false) into a group of operators composed of Union, Aggregate, Filter,etc.
MinusToDistinctRule.Config	Rule configuration.
MultiJoin	A MultiJoin represents a join of N inputs, whereas regular Joins represent strictly binary joins.
MultiJoinOptimizeBushyRule	Planner rule that finds an approximately optimal ordering for join operators using a heuristic algorithm.
MultiJoinOptimizeBushyRule.Config	Rule configuration.
MultiJoinProjectTransposeRule	MultiJoinProjectTransposeRule implements the rule for pulling LogicalProjects that are on top of a MultiJoin and beneath a LogicalJoin so the LogicalProject appears above the LogicalJoin.
MultiJoinProjectTransposeRule.Config	Rule configuration.
ProjectAggregateMergeRule	Planner rule that matches a Project on a Aggregate and projects away aggregate calls that are not used.
ProjectAggregateMergeRule.Config	Rule configuration.
ProjectCalcMergeRule	Planner rule that merges a Project and a Calc.
ProjectCalcMergeRule.Config	Rule configuration.
ProjectCorrelateTransposeRule	Planner rule that pushes a Project under Correlate to apply on Correlate's left and right inputs.
ProjectCorrelateTransposeRule.Config	Rule configuration.
ProjectCorrelateTransposeRule.RelNodesExprsHandler	Visitor for RelNodes which applies specified RexShuttle visitor for every node in the tree.
ProjectCorrelateTransposeRule.RexFieldAccessReplacer	Visitor for RexNodes which replaces RexCorrelVariable with specified.
ProjectFilterTransposeRule	Planner rule that pushes a Project past a Filter.
ProjectFilterTransposeRule.Config	Rule configuration.
ProjectJoinJoinRemoveRule	Planner rule that matches an Project on a Join and removes the left input of the join provided that the left input is also a left join if possible.
ProjectJoinJoinRemoveRule.Config	Rule configuration.
ProjectJoinRemoveRule	Planner rule that matches an Project on a Join and removes the join provided that the join is a left join or right join and the join keys are unique.
ProjectJoinRemoveRule.Config	Rule configuration.
ProjectJoinTransposeRule	Planner rule that pushes a Project past a Join by splitting the projection into a projection on top of each child of the join.
ProjectJoinTransposeRule.Config	Rule configuration.
ProjectMergeRule	ProjectMergeRule merges a Project into another Project, provided the projects aren't projecting identical sets of input references.
ProjectMergeRule.Config	Rule configuration.
ProjectMultiJoinMergeRule	Planner rule that pushes Project into a MultiJoin, creating a richer MultiJoin.
ProjectMultiJoinMergeRule.Config	Rule configuration.
ProjectRemoveRule	Planner rule that, given a Project node that merely returns its input, converts the node into its child.
ProjectRemoveRule.Config	Rule configuration.
ProjectSetOpTransposeRule	Planner rule that pushes a LogicalProject past a SetOp.
ProjectSetOpTransposeRule.Config	Rule configuration.
ProjectTableScanRule	Planner rule that converts a Project on a TableScan of a ProjectableFilterableTable to a Bindables.BindableTableScan.
ProjectTableScanRule.Config	Rule configuration.
ProjectToCalcRule	Rule to convert a LogicalProject to a LogicalCalc.
ProjectToCalcRule.Config	Rule configuration.
ProjectToWindowRule	Planner rule that slices a Project into sections which contain windowed aggregate functions and sections which do not.
ProjectToWindowRule.CalcToWindowRule	Instance of the rule that applies to a Calc that contains windowed aggregates and converts it into a mixture of LogicalWindow and Calc.
ProjectToWindowRule.CalcToWindowRule.CalcToWindowRuleConfig	Rule configuration.
ProjectToWindowRule.Config	Rule configuration.
ProjectToWindowRule.ProjectToLogicalProjectAndWindowRule	Instance of the rule that can be applied to a Project and that produces, in turn, a mixture of LogicalProject and LogicalWindow.
ProjectToWindowRule.ProjectToLogicalProjectAndWindowRule.ProjectToLogicalProjectAndWindowRuleConfig	Rule configuration.
ProjectWindowTransposeRule	Planner rule that pushes a LogicalProject past a LogicalWindow.
ProjectWindowTransposeRule.Config	Rule configuration.
PruneEmptyRules	Collection of rules which remove sections of a query plan known never to produce any rows.
PruneEmptyRules.CorrelateLeftEmptyRuleConfig	Configuration for rule that prunes a correlate if its left input is empty.
PruneEmptyRules.CorrelateRightEmptyRuleConfig	Configuration for rule that prunes a correlate if its right input is empty.
PruneEmptyRules.IntersectEmptyPruneRuleConfig	Configuration for a rule that prunes an Intersect if any of its inputs is empty.
PruneEmptyRules.JoinLeftEmptyRuleConfig	Configuration for rule that prunes a join it its left input is empty.
PruneEmptyRules.JoinRightEmptyRuleConfig	Configuration for rule that prunes a join it its right input is empty.
PruneEmptyRules.MinusEmptyPruneRuleConfig	Configuration for a rule that prunes empty inputs from a Minus.
PruneEmptyRules.PruneEmptyRule	Abstract prune empty rule that implements SubstitutionRule interface.
PruneEmptyRules.PruneEmptyRule.Config	Rule configuration.
PruneEmptyRules.RemoveEmptySingleRule	Rule that converts a relation into empty.
PruneEmptyRules.RemoveEmptySingleRule.RemoveEmptySingleRuleConfig	Rule configuration.
PruneEmptyRules.SortFetchZeroRuleConfig	Configuration for a rule that prunes a Sort if it has limit 0.
PruneEmptyRules.UnionEmptyPruneRuleConfig	Configuration for a rule that prunes empty inputs from a Minus.
PruneEmptyRules.ZeroMaxRowsRuleConfig	Configuration for rule that transforms an empty relational expression into an empty values.
PushProjector	PushProjector is a utility class used to perform operations used in push projection rules.
PushProjector.ExprCondition	A functor that replies true or false for a given expression.
ReduceDecimalsRule	Rule that reduces decimal operations (such as casts or arithmetic) into operations involving more primitive types (such as longs and doubles).
ReduceDecimalsRule.Config	Rule configuration.
ReduceDecimalsRule.DecimalShuttle	A shuttle which converts decimal expressions to expressions based on longs.
ReduceDecimalsRule.RexExpander	Rewrites a decimal expression for a specific set of SqlOperator's.
ReduceExpressionsRule<C extends ReduceExpressionsRule.Config>	Collection of planner rules that apply various simplifying transformations on RexNode trees.
ReduceExpressionsRule.CalcReduceExpressionsRule	Rule that reduces constants inside a Calc.
ReduceExpressionsRule.CalcReduceExpressionsRule.CalcReduceExpressionsRuleConfig	Rule configuration.
ReduceExpressionsRule.CaseShuttle	Shuttle that pushes predicates into a CASE.
ReduceExpressionsRule.Config	Rule configuration.
ReduceExpressionsRule.FilterReduceExpressionsRule	Rule that reduces constants inside a Filter.
ReduceExpressionsRule.FilterReduceExpressionsRule.FilterReduceExpressionsRuleConfig	Rule configuration.
ReduceExpressionsRule.JoinReduceExpressionsRule	Rule that reduces constants inside a Join.
ReduceExpressionsRule.JoinReduceExpressionsRule.JoinReduceExpressionsRuleConfig	Rule configuration.
ReduceExpressionsRule.ProjectReduceExpressionsRule	Rule that reduces constants inside a Project.
ReduceExpressionsRule.ProjectReduceExpressionsRule.ProjectReduceExpressionsRuleConfig	Rule configuration.
ReduceExpressionsRule.ReducibleExprLocator	Helper class used to locate expressions that either can be reduced to literals or contain redundant casts.
ReduceExpressionsRule.RexReplacer	Replaces expressions with their reductions.
ReduceExpressionsRule.WindowReduceExpressionsRule	Rule that reduces constants inside a Window.
ReduceExpressionsRule.WindowReduceExpressionsRule.WindowReduceExpressionsRuleConfig	Rule configuration.
SampleToFilterRule	This rule rewrite Sample which is bernoulli to the Filter.
SampleToFilterRule.Config	Rule configuration.
SemiJoinFilterTransposeRule	Planner rule that pushes SemiJoins down in a tree past a Filter.
SemiJoinFilterTransposeRule.Config	Rule configuration.
SemiJoinJoinTransposeRule	Planner rule that pushes a semi-join down in a tree past a Join in order to trigger other rules that will convert SemiJoins.
SemiJoinJoinTransposeRule.Config	Rule configuration.
SemiJoinProjectTransposeRule	Planner rule that pushes a semi-join down in a tree past a Project.
SemiJoinProjectTransposeRule.Config	Rule configuration.
SemiJoinRemoveRule	Planner rule that removes a semi-join from a join tree.
SemiJoinRemoveRule.Config	Rule configuration.
SemiJoinRule	Planner rule that creates a SemiJoin from a Join on top of a LogicalAggregate or on a RelNode which is unique for join's right keys.
SemiJoinRule.Config	Rule configuration.
SemiJoinRule.JoinOnUniqueToSemiJoinRule	SemiJoinRule that matches a Project on top of a Join with a RelNode which is unique for Join's right keys.
SemiJoinRule.JoinOnUniqueToSemiJoinRule.JoinOnUniqueToSemiJoinRuleConfig	Rule configuration.
SemiJoinRule.JoinToSemiJoinRule	SemiJoinRule that matches a Join with an empty Aggregate as its right input.
SemiJoinRule.JoinToSemiJoinRule.JoinToSemiJoinRuleConfig	Rule configuration.
SemiJoinRule.ProjectToSemiJoinRule	SemiJoinRule that matches a Project on top of a Join with an Aggregate as its right child.
SemiJoinRule.ProjectToSemiJoinRule.ProjectToSemiJoinRuleConfig	Rule configuration.
SortJoinCopyRule	Planner rule that copies a Sort past a Join without its limit and offset.
SortJoinCopyRule.Config	Rule configuration.
SortJoinTransposeRule	Planner rule that pushes a Sort past a Join.
SortJoinTransposeRule.Config	Rule configuration.
SortMergeRule	This rule try to merge the double Sort,one is Limit semantics, another sort is Limit or TOPN semantics.
SortMergeRule.Config	Rule configuration.
SortProjectTransposeRule	Planner rule that pushes a Sort past a Project.
SortProjectTransposeRule.Config	Rule configuration.
SortRemoveConstantKeysRule	Planner rule that removes keys from a a Sort if those keys are known to be constant, or removes the entire Sort if all keys are constant.
SortRemoveConstantKeysRule.Config	Rule configuration.
SortRemoveRedundantRule	Rule that removes redundant ORDER BY or LIMIT when its input RelNode's maximum row count is less than or equal to specified row count.
SortRemoveRedundantRule.Config	Rule configuration.
SortRemoveRule	Planner rule that removes a Sort if its input is already sorted.
SortRemoveRule.Config	Rule configuration.
SortUnionTransposeRule	Planner rule that pushes a Sort past a Union.
SortUnionTransposeRule.Config	Rule configuration.
SpatialRules	Collection of planner rules that convert calls to spatial functions into more efficient expressions.
SpatialRules.FilterHilbertRule	Rule that converts ST_DWithin in a Filter condition into a predicate on a Hilbert curve.
SpatialRules.FilterHilbertRule.Config	Rule configuration.
SubQueryRemoveRule	Transform that converts IN, EXISTS and scalar sub-queries into joins.
SubQueryRemoveRule.Config	Rule configuration.
SubstitutionRule	A rule that implements this interface indicates that the new RelNode is typically better than the old one.
TableScanRule	Deprecated. org.apache.calcite.rel.core.RelFactories.TableScanFactoryImpl has called RelOptTable.toRel(RelOptTable.ToRelContext).
TableScanRule.Config	Rule configuration.
TransformationRule	Logical transformation rule, only logical operator can be rule operand, and only generate logical alternatives.
UnionEliminatorRule	UnionEliminatorRule checks to see if its possible to optimize a Union call by eliminating the Union operator altogether in the case the call consists of only one input.
UnionEliminatorRule.Config	Rule configuration.
UnionMergeRule	UnionMergeRule implements the rule for combining two non-distinct SetOps into a single SetOp.
UnionMergeRule.Config	Rule configuration.
UnionPullUpConstantsRule	Planner rule that pulls up constants through a Union operator.
UnionPullUpConstantsRule.Config	Rule configuration.
UnionToDistinctRule	Planner rule that translates a distinct Union (all = false) into an Aggregate on top of a non-distinct Union (all = true).
UnionToDistinctRule.Config	Rule configuration.
ValuesReduceRule	Planner rule that folds projections and filters into an underlying LogicalValues.
ValuesReduceRule.Config	Rule configuration.