org.apache.calcite.materialize

Class Lattice

java.lang.Object

org.apache.calcite.materialize.Lattice

public class Lattice
extends Object

Structure that allows materialized views based upon a star schema to be recognized and recommended.

Nested Class Summary

Nested Classes

Modifier and Type	Class and Description
static class	Lattice.Builder Lattice builder.
static class	Lattice.Column Column in a lattice.
static class	Lattice.Measure Measure in a lattice.
static class	Lattice.Node Source relation of a lattice.
static class	Lattice.Tile Materialized aggregate within a lattice.
static class	Lattice.TileBuilder Tile builder.

Field Summary

Fields

Modifier and Type	Field and Description
boolean	algorithm
long	algorithmMaxMillis
boolean	auto
static Map<String,Integer>	CARDINALITY_MAP
com.google.common.collect.ImmutableList<Lattice.Column>	columns
com.google.common.collect.ImmutableList<Lattice.Measure>	defaultMeasures
com.google.common.collect.ImmutableList<Lattice.Node>	nodes
double	rowCountEstimate
com.google.common.collect.ImmutableList<Lattice.Tile>	tiles
com.google.common.collect.ImmutableList<String>	uniqueColumnNames

Method Summary

Methods

Modifier and Type	Method and Description
static Lattice.Builder	builder(CalciteSchema calciteSchema, String sql)
Iterable<? extends Lattice.Tile>	computeTiles()
static Lattice	create(CalciteSchema schema, String sql, boolean auto) Creates a Lattice.
StarTable	createStarTable()
double	getFactRowCount() Returns an estimate of the number of rows in the un-aggregated star.
double	getRowCount(List<Lattice.Column> columns) Returns an estimate of the number of rows in the tile with the given dimensions.
String	sql(ImmutableBitSet groupSet, List<Lattice.Measure> aggCallList)
List<Lattice.Measure>	toMeasures(List<AggregateCall> aggCallList)

Methods inherited from class java.lang.Object

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

Field Detail

nodes

public final com.google.common.collect.ImmutableList<Lattice.Node> nodes

columns

public final com.google.common.collect.ImmutableList<Lattice.Column> columns

auto

public final boolean auto

algorithm

public final boolean algorithm

algorithmMaxMillis

public final long algorithmMaxMillis

rowCountEstimate

public final double rowCountEstimate

defaultMeasures

public final com.google.common.collect.ImmutableList<Lattice.Measure> defaultMeasures

tiles

public final com.google.common.collect.ImmutableList<Lattice.Tile> tiles

uniqueColumnNames

public final com.google.common.collect.ImmutableList<String> uniqueColumnNames

CARDINALITY_MAP

public static final Map<String,Integer> CARDINALITY_MAP

Method Detail

create

public static Lattice create(CalciteSchema schema,
             String sql,
             boolean auto)

Creates a Lattice.

sql

public String sql(ImmutableBitSet groupSet,
         List<Lattice.Measure> aggCallList)

createStarTable

public StarTable createStarTable()

builder

public static Lattice.Builder builder(CalciteSchema calciteSchema,
                      String sql)

toMeasures

public List<Lattice.Measure> toMeasures(List<AggregateCall> aggCallList)

computeTiles

public Iterable<? extends Lattice.Tile> computeTiles()

getFactRowCount

public double getFactRowCount()

Returns an estimate of the number of rows in the un-aggregated star.

getRowCount

public double getRowCount(List<Lattice.Column> columns)

Returns an estimate of the number of rows in the tile with the given dimensions.