Class ImplementBernoulliSampleAsFilter
- java.lang.Object
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- io.prestosql.sql.planner.iterative.rule.ImplementBernoulliSampleAsFilter
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- All Implemented Interfaces:
Rule<SampleNode>
public class ImplementBernoulliSampleAsFilter extends Object implements Rule<SampleNode>
Transforms:- Sample(BERNOULLI, p) - X
Into:- Filter (rand() < p) - X
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Nested Class Summary
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Nested classes/interfaces inherited from interface io.prestosql.sql.planner.iterative.Rule
Rule.Context, Rule.Result
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Constructor Summary
Constructors Constructor Description ImplementBernoulliSampleAsFilter(Metadata metadata)
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Method Summary
All Methods Instance Methods Concrete Methods Modifier and Type Method Description Rule.Result
apply(SampleNode sample, Captures captures, Rule.Context context)
Pattern<SampleNode>
getPattern()
Returns a pattern to which plan nodes this rule applies.
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Constructor Detail
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ImplementBernoulliSampleAsFilter
public ImplementBernoulliSampleAsFilter(Metadata metadata)
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Method Detail
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getPattern
public Pattern<SampleNode> getPattern()
Description copied from interface:Rule
Returns a pattern to which plan nodes this rule applies.- Specified by:
getPattern
in interfaceRule<SampleNode>
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apply
public Rule.Result apply(SampleNode sample, Captures captures, Rule.Context context)
- Specified by:
apply
in interfaceRule<SampleNode>
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