Module org.cojen.tupl

Package org.cojen.tupl.diag

Class QueryPlan.Aggregator

java.lang.Object

org.cojen.tupl.diag.QueryPlan

org.cojen.tupl.diag.QueryPlan.Aggregator

All Implemented Interfaces:

Serializable

Enclosing class:

QueryPlan

public static final class QueryPlan.Aggregator
extends QueryPlan

Query plan node which applies aggregation.

See Also:

• Serialized Form

Nested Class Summary

Nested classes/interfaces inherited from class org.cojen.tupl.diag.QueryPlan

QueryPlan.Aggregator, QueryPlan.DisjointUnion, QueryPlan.Empty, QueryPlan.Exists, QueryPlan.Filter, QueryPlan.FullScan, QueryPlan.Grouper, QueryPlan.GroupSort, QueryPlan.Identity, QueryPlan.LoadOne, QueryPlan.Mapper, QueryPlan.NaturalJoin, QueryPlan.NestedLoopsJoin, QueryPlan.PrimaryJoin, QueryPlan.RangeScan, QueryPlan.RangeUnion, QueryPlan.Scan, QueryPlan.Set, QueryPlan.Sort, QueryPlan.Table, QueryPlan.Union

Field Summary

Fields

Modifier and Type	Field	Description
final String[]	groupBy
final String	operation
final QueryPlan	source
final String	target

Constructor Summary

Constructors

Constructor	Description
Aggregator(String target, String operation, String[] groupBy, QueryPlan source)

Method Summary

Modifier and Type	Method	Description
boolean	equals(Object obj)
int	hashCode()
QueryPlan.Aggregator	withOperation(String operation)

Methods inherited from class org.cojen.tupl.diag.QueryPlan

appendTo, appendTo, printTo, toString

Methods inherited from class java.lang.Object

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

Field Details

target

public final String target

operation

public final String operation

groupBy

public final String[] groupBy

source

public final QueryPlan source

Constructor Details

Aggregator

public Aggregator(String target,
 String operation,
 String[] groupBy,
 QueryPlan source)

Parameters:

target - describes the target row type

operation - describes the aggregate operation (optional)

groupBy - group-by columns (or null if none)

source - child plan node

Method Details

withOperation

public QueryPlan.Aggregator withOperation(String operation)

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object