Class RecordQueryScoreForRankPlan
- java.lang.Object
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- com.apple.foundationdb.record.query.plan.plans.RecordQueryScoreForRankPlan
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- All Implemented Interfaces:
PlanHashable
,QueryPlan<FDBQueriedRecord<Message>>
,RecordQueryPlan
,RecordQueryPlanWithChild
,RecordQueryPlanWithChildren
,Bindable
,Correlated<RelationalExpression>
,PlannerGraphRewritable
,RelationalExpressionWithChildren
,RelationalExpression
@API(INTERNAL) public class RecordQueryScoreForRankPlan extends Object implements RecordQueryPlanWithChild
A query plan that converts ranks to scores and executes a child plan with the conversion results bound in named parameters.
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Nested Class Summary
Nested Classes Modifier and Type Class Description static class
RecordQueryScoreForRankPlan.ScoreForRank
A single conversion of a rank to a score to be bound to some name.-
Nested classes/interfaces inherited from interface com.apple.foundationdb.record.PlanHashable
PlanHashable.PlanHashKind
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Nested classes/interfaces inherited from interface com.apple.foundationdb.record.query.plan.temp.RelationalExpression
RelationalExpression.CombineFunction<R,S>, RelationalExpression.CombinePredicate
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Field Summary
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Fields inherited from interface com.apple.foundationdb.record.query.plan.plans.QueryPlan
UNKNOWN_MAX_CARDINALITY
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Constructor Summary
Constructors Constructor Description RecordQueryScoreForRankPlan(RecordQueryPlan plan, List<RecordQueryScoreForRankPlan.ScoreForRank> ranks)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description boolean
equals(Object other)
boolean
equalsWithoutChildren(RelationalExpression otherExpression, AliasMap equivalencesMap)
<M extends Message>
RecordCursor<FDBQueriedRecord<M>>execute(FDBRecordStoreBase<M> store, EvaluationContext context, byte[] continuation, ExecuteProperties executeProperties)
Execute this query plan.AvailableFields
getAvailableFields()
RecordQueryPlan
getChild()
int
getComplexity()
Returns an integer representing the "complexity" of the generated plan.Set<CorrelationIdentifier>
getCorrelatedToWithoutChildren()
List<? extends Quantifier>
getQuantifiers()
Return an iterator of references to the children of this planner expression.List<RecordQueryScoreForRankPlan.ScoreForRank>
getRanks()
int
hashCode()
int
hashCodeWithoutChildren()
boolean
isReverse()
Indicates whether this plan will return values in "reverse" order from the natural order of results of this plan.void
logPlanStructure(StoreTimer timer)
Adds one to an appropriateStoreTimer
counter for each plan and subplan of this plan, allowing tracking of which plans are being chosen (e.g.int
planHash(PlanHashable.PlanHashKind hashKind)
Return a hash similar tohashCode
, but with the additional guarantee that is is stable across JVMs.RecordQueryScoreForRankPlan
rebaseWithRebasedQuantifiers(AliasMap translationMap, List<Quantifier> rebasedQuantifiers)
PlannerGraph
rewritePlannerGraph(List<? extends PlannerGraph> childGraphs)
Method to rewrite the planner graph.String
toString()
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Methods inherited from class java.lang.Object
clone, finalize, getClass, notify, notifyAll, wait, wait, wait
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Methods inherited from interface com.apple.foundationdb.record.PlanHashable
planHash
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Methods inherited from interface com.apple.foundationdb.record.query.plan.plans.QueryPlan
execute, execute
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Methods inherited from interface com.apple.foundationdb.record.query.plan.plans.RecordQueryPlan
accept, execute, execute, execute, getQueryPlanChildren, structuralEquals, structuralEquals, structuralHashCode
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Methods inherited from interface com.apple.foundationdb.record.query.plan.plans.RecordQueryPlanWithChild
getChildren, getRelationalChildCount, getUsedIndexes, hasFullRecordScan, hasIndexScan, hasLoadBykeys, hasRecordScan, maxCardinality
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Methods inherited from interface com.apple.foundationdb.record.query.plan.temp.RelationalExpression
acceptPropertyVisitor, bindIdentities, bindTo, canCorrelate, enumerateUnboundCorrelatedTo, findMatches, match, semanticEquals, semanticEquals, semanticHashCode, show
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Methods inherited from interface com.apple.foundationdb.record.query.plan.temp.expressions.RelationalExpressionWithChildren
getCorrelatedTo, rebase
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Constructor Detail
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RecordQueryScoreForRankPlan
public RecordQueryScoreForRankPlan(@Nonnull RecordQueryPlan plan, @Nonnull List<RecordQueryScoreForRankPlan.ScoreForRank> ranks)
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Method Detail
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execute
@Nonnull public <M extends Message> RecordCursor<FDBQueriedRecord<M>> execute(@Nonnull FDBRecordStoreBase<M> store, @Nonnull EvaluationContext context, @Nullable byte[] continuation, @Nonnull ExecuteProperties executeProperties)
Description copied from interface:RecordQueryPlan
Execute this query plan.- Specified by:
execute
in interfaceRecordQueryPlan
- Type Parameters:
M
- type used to represent stored records- Parameters:
store
- record store from which to fetch recordscontext
- evaluation context containing parameter bindingscontinuation
- continuation from a previous execution of this same planexecuteProperties
- limits on execution- Returns:
- a cursor of records that match the query criteria
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getRanks
@Nonnull public List<RecordQueryScoreForRankPlan.ScoreForRank> getRanks()
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getChild
@Nonnull public RecordQueryPlan getChild()
- Specified by:
getChild
in interfaceRecordQueryPlanWithChild
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getQuantifiers
@Nonnull @API(EXPERIMENTAL) public List<? extends Quantifier> getQuantifiers()
Description copied from interface:RelationalExpression
Return an iterator of references to the children of this planner expression. The iterators returned by different calls are guaranteed to be independent (i.e., advancing one will not advance another). However, they might point to the same object, as whenCollections.emptyIterator()
is returned. The returned iterator should be treated as an immutable object and may throw an exception ifIterator.remove()
is called. The iterator must return its elements in a consistent order.- Specified by:
getQuantifiers
in interfaceRelationalExpression
- Returns:
- an iterator of references to the children of this planner expression
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getAvailableFields
@Nonnull public AvailableFields getAvailableFields()
- Specified by:
getAvailableFields
in interfaceRecordQueryPlan
- Specified by:
getAvailableFields
in interfaceRecordQueryPlanWithChild
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isReverse
public boolean isReverse()
Description copied from interface:QueryPlan
Indicates whether this plan will return values in "reverse" order from the natural order of results of this plan. The return value istrue
if the plan returns elements in descending order andfalse
if the elements are returned in ascending order.- Specified by:
isReverse
in interfaceQueryPlan<FDBQueriedRecord<Message>>
- Returns:
true
if this plan returns elements in reverse order
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getCorrelatedToWithoutChildren
@Nonnull public Set<CorrelationIdentifier> getCorrelatedToWithoutChildren()
- Specified by:
getCorrelatedToWithoutChildren
in interfaceRelationalExpressionWithChildren
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rebaseWithRebasedQuantifiers
@Nonnull public RecordQueryScoreForRankPlan rebaseWithRebasedQuantifiers(@Nonnull AliasMap translationMap, @Nonnull List<Quantifier> rebasedQuantifiers)
- Specified by:
rebaseWithRebasedQuantifiers
in interfaceRelationalExpressionWithChildren
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equalsWithoutChildren
public boolean equalsWithoutChildren(@Nonnull RelationalExpression otherExpression, @Nonnull AliasMap equivalencesMap)
- Specified by:
equalsWithoutChildren
in interfaceRelationalExpression
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hashCodeWithoutChildren
public int hashCodeWithoutChildren()
- Specified by:
hashCodeWithoutChildren
in interfaceRelationalExpression
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planHash
public int planHash(@Nonnull PlanHashable.PlanHashKind hashKind)
Description copied from interface:PlanHashable
Return a hash similar tohashCode
, but with the additional guarantee that is is stable across JVMs.- Specified by:
planHash
in interfacePlanHashable
- Parameters:
hashKind
- the "kind" of hash to calculate. Each kind of hash has a particular logic with regards to included and excluded items.- Returns:
- a stable hash code
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logPlanStructure
public void logPlanStructure(StoreTimer timer)
Description copied from interface:QueryPlan
Adds one to an appropriateStoreTimer
counter for each plan and subplan of this plan, allowing tracking of which plans are being chosen (e.g. index scan vs. full scan).- Specified by:
logPlanStructure
in interfaceQueryPlan<FDBQueriedRecord<Message>>
- Parameters:
timer
- the counters to increment
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getComplexity
public int getComplexity()
Description copied from interface:QueryPlan
Returns an integer representing the "complexity" of the generated plan. Currently, this should simply be the number of plans in the plan tree with this plan as the root (i.e. the number of descendants of this plan, including itself).- Specified by:
getComplexity
in interfaceQueryPlan<FDBQueriedRecord<Message>>
- Returns:
- the complexity of this plan
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rewritePlannerGraph
@Nonnull public PlannerGraph rewritePlannerGraph(@Nonnull List<? extends PlannerGraph> childGraphs)
Description copied from interface:PlannerGraphRewritable
Method to rewrite the planner graph.- Specified by:
rewritePlannerGraph
in interfacePlannerGraphRewritable
- Parameters:
childGraphs
- planner graphs of children expression that already have been computed- Returns:
- a new planner graph that can combine the
childGraph
s in a meaningful way. Note that there is no obligation to use thechildGraph
s at all, this method can create a new independent planner graph completely from scratch.
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