org.datanucleus.store.rdbms.sql.method
Class AvgFunction

java.lang.Object
  org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod
      org.datanucleus.store.rdbms.sql.method.SimpleAggregateMethod
          org.datanucleus.store.rdbms.sql.method.AvgFunction

All Implemented Interfaces:

SQLMethod

public class AvgFunction
extends SimpleAggregateMethod

Expression handler to invoke the SQL AVG aggregation function. For use in evaluating AVG({expr}) where the RDBMS supports this function. Returns a NumericExpression "AVG({numericExpr})".

Field Summary

Fields inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

clr, exprFactory, LOCALISER, stmt

Constructor Summary

AvgFunction()

Method Summary

protected java.lang.Class	getClassForMapping()
protected java.lang.String	getFunctionName()

Methods inherited from class org.datanucleus.store.rdbms.sql.method.SimpleAggregateMethod

getExpression

Methods inherited from class org.datanucleus.store.rdbms.sql.method.AbstractSQLMethod

getMappingForClass, setStatement

Methods inherited from class java.lang.Object

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

Constructor Detail

AvgFunction

public AvgFunction()

Method Detail

getFunctionName

protected java.lang.String getFunctionName()

Specified by:

getFunctionName in class SimpleAggregateMethod

getClassForMapping

protected java.lang.Class getClassForMapping()

Specified by:

getClassForMapping in class SimpleAggregateMethod