public static interface BuiltInMetadata.Selectivity extends Metadata
Modifier and Type | Interface and Description |
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static interface |
BuiltInMetadata.Selectivity.Handler
Handler API.
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Modifier and Type | Field and Description |
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static MetadataDef<BuiltInMetadata.Selectivity> |
DEF |
Modifier and Type | Method and Description |
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java.lang.Double |
getSelectivity(RexNode predicate)
Estimates the percentage of an expression's output rows which satisfy a
given predicate.
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static final MetadataDef<BuiltInMetadata.Selectivity> DEF
java.lang.Double getSelectivity(RexNode predicate)
predicate
- predicate whose selectivity is to be estimated against
rel's outputCopyright © 2012–2019 The Apache Software Foundation. All rights reserved.