ProfilerLatticeStatisticProvider (Apache Calcite API)

java.lang.Object
- org.apache.calcite.materialize.ProfilerLatticeStatisticProvider

All Implemented Interfaces:

LatticeStatisticProvider
```
class ProfilerLatticeStatisticProvider
extends java.lang.Object
implements LatticeStatisticProvider
```
Implementation of LatticeStatisticProvider that uses a Profiler.

Nested Class Summary
- Nested classes/interfaces inherited from interface org.apache.calcite.materialize.LatticeStatisticProvider
  LatticeStatisticProvider.Factory

Field Summary

Fields
Modifier and Type Field Description

(package private) static LatticeStatisticProvider.Factory FACTORY

private java.util.function.Supplier<Profiler.Profile> profile

Constructor Summary

Constructors
Modifier Constructor Description

private ProfilerLatticeStatisticProvider(Lattice lattice)
Creates a ProfilerLatticeStatisticProvider.

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`double`	`cardinality(java.util.List<Lattice.Column> columns)`	Returns an estimate of the number of distinct values in a column or list of columns.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - FACTORY
```
static final LatticeStatisticProvider.Factory FACTORY
```
  - profile
```
private final java.util.function.Supplier<Profiler.Profile> profile
```
- Constructor Detail
  - ProfilerLatticeStatisticProvider
```
private ProfilerLatticeStatisticProvider(Lattice lattice)
```
    Creates a ProfilerLatticeStatisticProvider.
- Method Detail
  - cardinality
```
public double cardinality(java.util.List<Lattice.Column> columns)
```
    Description copied from interface: LatticeStatisticProvider
    
    Returns an estimate of the number of distinct values in a column or list of columns.
    
    Specified by:
    
    cardinality in interface LatticeStatisticProvider