Package io.trino.spi.connector

Class GroupingProperty<E>

java.lang.Object

io.trino.spi.connector.GroupingProperty<E>

All Implemented Interfaces:

LocalProperty<E>

public final class GroupingProperty<E>
extends Object
implements LocalProperty<E>

Constructor Summary

Constructors

Constructor	Description
GroupingProperty(Collection<E> columns)

Method Summary

Modifier and Type	Method	Description
LocalProperty<E>	constrain(Set<E> columns)	Return a new instance with the give (reduced) set of columns
boolean	equals(Object o)
Set<E>	getColumns()
int	hashCode()
boolean	isOrderSensitive()	Returns true if reordering breaks this LocalProperty
boolean	isSimplifiedBy(LocalProperty<E> known)	Return true if the actual LocalProperty can be used to simplify this LocalProperty
String	toString()
<T> Optional<LocalProperty<T>>	translate(Function<E,Optional<T>> translator)

Methods inherited from class java.lang.Object

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

Methods inherited from interface io.trino.spi.connector.LocalProperty

withConstants

Constructor Details

GroupingProperty

public GroupingProperty(Collection<E> columns)

Method Details

isOrderSensitive

public boolean isOrderSensitive()

Description copied from interface: LocalProperty

Returns true if reordering breaks this LocalProperty

Specified by:

isOrderSensitive in interface LocalProperty<E>

getColumns

public Set<E> getColumns()

Specified by:

getColumns in interface LocalProperty<E>

constrain

public LocalProperty<E> constrain(Set<E> columns)

Description copied from interface: LocalProperty

Return a new instance with the give (reduced) set of columns

Specified by:

constrain in interface LocalProperty<E>

isSimplifiedBy

public boolean isSimplifiedBy(LocalProperty<E> known)

Description copied from interface: LocalProperty

Return true if the actual LocalProperty can be used to simplify this LocalProperty

Specified by:

isSimplifiedBy in interface LocalProperty<E>

translate

public <T> Optional<LocalProperty<T>> translate(Function<E,Optional<T>> translator)

Specified by:

translate in interface LocalProperty<E>

Returns:

Optional.empty() if any of the columns could not be translated

toString

public String toString()

Overrides:

toString in class Object

equals

public boolean equals(Object o)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object