Class AzureBlobStorageSource.CardinalityEstimator
java.lang.Object
org.apache.wayang.basic.operators.AzureBlobStorageSource.CardinalityEstimator
- All Implemented Interfaces:
Serializable
,CardinalityEstimator
- Enclosing class:
- AzureBlobStorageSource
protected class AzureBlobStorageSource.CardinalityEstimator
extends Object
implements CardinalityEstimator
Custom
CardinalityEstimator
for FlatMapOperator
s.- See Also:
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Field Summary
FieldsModifier and TypeFieldDescriptionstatic final double
static final double
We expect selectivities to be correct within a factor of 0.05.final CardinalityEstimate
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Constructor Summary
Constructors -
Method Summary
Modifier and TypeMethodDescriptionestimate
(OptimizationContext optimizationContext, CardinalityEstimate... inputEstimates)
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Field Details
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FALLBACK_ESTIMATE
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CORRECTNESS_PROBABILITY
public static final double CORRECTNESS_PROBABILITY- See Also:
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EXPECTED_ESTIMATE_DEVIATION
public static final double EXPECTED_ESTIMATE_DEVIATIONWe expect selectivities to be correct within a factor of 0.05.- See Also:
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Constructor Details
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CardinalityEstimator
protected CardinalityEstimator()
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Method Details
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estimate
public CardinalityEstimate estimate(OptimizationContext optimizationContext, CardinalityEstimate... inputEstimates) - Specified by:
estimate
in interfaceCardinalityEstimator
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