RelMdSelectivity (Calcite Core 1.2.0-incubating API)

```
public class RelMdSelectivity
extends Object
```
RelMdSelectivity supplies a default implementation of RelMetadataQuery.getSelectivity(org.apache.calcite.rel.RelNode, org.apache.calcite.rex.RexNode) for the standard logical algebra.

Fields
Modifier and Type	Field and Description
`static RelMetadataProvider`	`SOURCE`

Constructors
Modifier	Constructor and Description
`protected`	`RelMdSelectivity()`

Methods
Modifier and Type	Method and Description
`Double`	`getSelectivity(Aggregate rel, RexNode predicate)`
`Double`	`getSelectivity(Filter rel, RexNode predicate)`
`Double`	`getSelectivity(Project rel, RexNode predicate)`
`Double`	`getSelectivity(RelNode rel, RexNode predicate)`
`Double`	`getSelectivity(SemiJoin rel, RexNode predicate)`
`Double`	`getSelectivity(Sort rel, RexNode predicate)`
`Double`	`getSelectivity(Union rel, RexNode predicate)`

public static final RelMetadataProvider SOURCE

public Double getSelectivity(Union rel,
                    RexNode predicate)

public Double getSelectivity(Sort rel,
                    RexNode predicate)

public Double getSelectivity(Filter rel,
                    RexNode predicate)

public Double getSelectivity(SemiJoin rel,
                    RexNode predicate)

public Double getSelectivity(Aggregate rel,
                    RexNode predicate)

public Double getSelectivity(Project rel,
                    RexNode predicate)

public Double getSelectivity(RelNode rel,
                    RexNode predicate)

Class RelMdSelectivity