Java Doc for MaxMinAggregator.java in » Database-DBMS » db-derby-10.2 » org » apache » derby » impl » sql » execute » Java Source Code / Java DocumentationJava Source Code and Java Documentation
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Java Source Code / Java Documentation
»
Database DBMS
»
db derby 10.2
»
org.apache.derby.impl.sql.execute
Source Cross Reference
Class Diagram
Java Document (Java Doc)
java.lang
.Object
org.apache.derby.impl.sql.execute
.SystemAggregator
org.apache.derby.impl.sql.execute
.OrderableAggregator
org.apache.derby.impl.sql.execute
.MaxMinAggregator
MaxMinAggregator
final
public
class MaxMinAggregator extends
OrderableAggregator
(Code)
Aggregator for MAX()/MIN(). Defers most of its work to OrderableAggregator.
See Also:
OrderableAggregator
author:
jamie
Method Summary
protected
void
accumulate
(
DataValueDescriptor
addend)
public
int
getTypeFormatId
()
Get the formatID which corresponds to this class.
public
ExecAggregator
newAggregator
()
public
void
readExternal
(
ObjectInput
in)
public
void
setup
(
String
aggregateName)
public
void
writeExternal
(
ObjectOutput
out)
Method Detail
accumulate
protected
void accumulate(
DataValueDescriptor
addend) throws
StandardException
(Code)
Accumulate
Parameters:
addend - value to be added in
exception:
StandardException
- on error
getTypeFormatId
public
int getTypeFormatId()
(Code)
Get the formatID which corresponds to this class. the formatID of this class
newAggregator
public
ExecAggregator
newAggregator()
(Code)
ExecAggregator the new aggregator
readExternal
public
void readExternal(
ObjectInput
in) throws
IOException
,
ClassNotFoundException
(Code)
See Also:
java.io.Externalizable.readExternal
See Also:
exception:
IOException
- on error
exception:
ClassNotFoundException
- on error
setup
public
void setup(
String
aggregateName)
(Code)
writeExternal
public
void writeExternal(
ObjectOutput
out) throws
IOException
(Code)
Fields inherited from
org.apache.derby.impl.sql.execute.OrderableAggregator
protected
DataValueDescriptor
value
(Code)
(Java Doc)
Methods inherited from
org.apache.derby.impl.sql.execute.OrderableAggregator
public
DataValueDescriptor
getResult() throws
StandardException
(Code)
(Java Doc)
public
void merge(
ExecAggregator
addend) throws
StandardException
(Code)
(Java Doc)
public
void readExternal(
ObjectInput
in) throws
IOException
,
ClassNotFoundException
(Code)
(Java Doc)
public
void setup(
String
aggregateName)
(Code)
(Java Doc)
public
void writeExternal(
ObjectOutput
out) throws
IOException
(Code)
(Java Doc)
Methods inherited from
org.apache.derby.impl.sql.execute.SystemAggregator
public
void accumulate(
DataValueDescriptor
addend,
Object
ga) throws
StandardException
(Code)
(Java Doc)
abstract
protected
void accumulate(
DataValueDescriptor
addend) throws
StandardException
(Code)
(Java Doc)
public
boolean didEliminateNulls()
(Code)
(Java Doc)
public
void readExternal(
ObjectInput
in) throws
IOException
,
ClassNotFoundException
(Code)
(Java Doc)
public
void writeExternal(
ObjectOutput
out) throws
IOException
(Code)
(Java Doc)
Methods inherited from
java.lang.Object
native
protected
Object
clone() throws
CloneNotSupportedException
(Code)
(Java Doc)
public
boolean equals(
Object
obj)
(Code)
(Java Doc)
protected
void finalize() throws
Throwable
(Code)
(Java Doc)
final native
public
Class
> getClass()
(Code)
(Java Doc)
native
public
int hashCode()
(Code)
(Java Doc)
final native
public
void notify()
(Code)
(Java Doc)
final native
public
void notifyAll()
(Code)
(Java Doc)
public
String
toString()
(Code)
(Java Doc)
final native
public
void wait(long timeout) throws
InterruptedException
(Code)
(Java Doc)
final
public
void wait(long timeout, int nanos) throws
InterruptedException
(Code)
(Java Doc)
final
public
void wait() throws
InterruptedException
(Code)
(Java Doc)
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