Package org.apache.calcite.profile

Class ProfilerImpl

java.lang.Object

org.apache.calcite.profile.ProfilerImpl

All Implemented Interfaces:

Profiler

public class ProfilerImpl
extends Object
implements Profiler

Implementation of Profiler that only investigates "interesting" combinations of columns.

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
static class	ProfilerImpl.Builder	Builds a ProfilerImpl.

Nested classes/interfaces inherited from interface org.apache.calcite.profile.Profiler

Profiler.Column, Profiler.Distribution, Profiler.FunctionalDependency, Profiler.Profile, Profiler.RowCount, Profiler.Statistic, Profiler.Unique

Method Summary

Modifier and Type	Method	Description
static ProfilerImpl.Builder	builder()
Profiler.Profile	profile(Iterable<List<Comparable>> rows, List<Profiler.Column> columns, Collection<ImmutableBitSet> initialGroups)	Creates a profile of a data set.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Method Details

builder

public static ProfilerImpl.Builder builder()

profile

public Profiler.Profile profile(Iterable<List<Comparable>> rows,
 List<Profiler.Column> columns,
 Collection<ImmutableBitSet> initialGroups)

Description copied from interface: Profiler

Creates a profile of a data set.

Specified by:

profile in interface Profiler

Parameters:

rows - List of rows. Can be iterated over more than once (maybe not cheaply)

columns - Column definitions

initialGroups - List of combinations of columns that should be profiled early, because they may be interesting

Returns:

A profile describing relationships within the data set