net.sf.farrago.query
Class FennelRelParamId

java.lang.Object
  net.sf.farrago.query.FennelRelParamId

public class FennelRelParamId
extends Object

FennelRelParamId is an opaque type representing the reservation of a FennelDynamicParamId during query planning. See the design docs for why this logical ID is needed in addition to FennelDynamicParamId, which is the physical ID. A 64-bit integer is used since a large number of these may be generated and then discarded during query planning. (I hate to think about the implications of a planner that would actually exhaust 32 bits, but still, one just can't be too safe.)

Version:

$Id: //open/dev/farrago/src/net/sf/farrago/query/FennelRelParamId.java#8 $

Author:

John V. Sichi

Field Summary

private long

id

Constructor Summary

FennelRelParamId(long id)

Method Summary

boolean	equals(Object other)
int	hashCode()
long	longValue()
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

id

private final long id

Constructor Detail

FennelRelParamId

public FennelRelParamId(long id)

Method Detail

longValue

public long longValue()

Returns:

the underlying long value

equals

public boolean equals(Object other)

Overrides:

equals in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

toString

public String toString()

Overrides:

toString in class Object