Package org.apache.calcite.materialize

Class Lattice.Column

java.lang.Object

org.apache.calcite.materialize.Lattice.Column

All Implemented Interfaces:

Comparable<Lattice.Column>

Direct Known Subclasses:

Lattice.BaseColumn, Lattice.DerivedColumn

Enclosing class:

Lattice

public abstract static class Lattice.Column
extends Object
implements Comparable<Lattice.Column>

Column in a lattice. May be an a base column or an expression, and may have an additional alias that is unique within the entire lattice.

Field Summary

Fields

Modifier and Type	Field	Description
final String	alias	Alias of the column, unique within the lattice.
final int	ordinal	Ordinal of the column within the lattice.

Method Summary

Modifier and Type	Method	Description
int	compareTo(Lattice.Column column)
abstract @Nullable String	defaultAlias()	The alias that SQL would give to this expression.
boolean	equals(@Nullable Object obj)
int	hashCode()
abstract void	toSql(Lattice.SqlWriter writer)

Methods inherited from class java.lang.Object

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

Field Details

ordinal

public final int ordinal

Ordinal of the column within the lattice.

alias

public final String alias

Alias of the column, unique within the lattice. Derived from the column name, automatically disambiguated if necessary.

Method Details

compareTo

public int compareTo(Lattice.Column column)

Specified by:

compareTo in interface Comparable<Lattice.Column>

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(@Nullable Object obj)

Overrides:

equals in class Object

toSql

public abstract void toSql(Lattice.SqlWriter writer)

defaultAlias

public abstract @Nullable String defaultAlias()

The alias that SQL would give to this expression.