org.hibernate.dialect.function

Class StandardAnsiSqlAggregationFunctions.AvgFunction

java.lang.Object

org.hibernate.dialect.function.StandardSQLFunction

org.hibernate.dialect.function.StandardAnsiSqlAggregationFunctions.AvgFunction

All Implemented Interfaces:

SQLFunction

Direct Known Subclasses:

AvgWithArgumentCastFunction

Enclosing class:

StandardAnsiSqlAggregationFunctions

public static class StandardAnsiSqlAggregationFunctions.AvgFunction
extends StandardSQLFunction

Definition of a standard ANSI SQL compliant AVG function

Field Summary

Fields

Modifier and Type	Field and Description
static StandardAnsiSqlAggregationFunctions.AvgFunction	INSTANCE Singleton access

Constructor Summary

Constructors

Modifier	Constructor and Description
protected	AvgFunction()

Method Summary

Modifier and Type	Method and Description
protected int	determineJdbcTypeCode(Type firstArgumentType, SessionFactoryImplementor factory)
protected String	render(int firstArgumentJdbcType, String argument, SessionFactoryImplementor factory)
String	render(Type firstArgumentType, List arguments, SessionFactoryImplementor factory) Render the function call as SQL fragment.
protected String	renderArgument(String argument, int firstArgumentJdbcType)

Methods inherited from class org.hibernate.dialect.function.StandardSQLFunction

getName, getRenderedName, getReturnType, getType, hasArguments, hasParenthesesIfNoArguments, toString

Methods inherited from class java.lang.Object

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

Field Detail

INSTANCE

public static final StandardAnsiSqlAggregationFunctions.AvgFunction INSTANCE

Singleton access

Constructor Detail

AvgFunction

protected AvgFunction()

Method Detail

render

public String render(Type firstArgumentType,
                     List arguments,
                     SessionFactoryImplementor factory)
              throws QueryException

Description copied from interface: SQLFunction

Render the function call as SQL fragment.

Note, the 'firstArgumentType' parameter should match the one passed into SQLFunction.getReturnType(org.hibernate.type.Type, org.hibernate.engine.spi.Mapping)

Specified by:

render in interface SQLFunction

Overrides:

render in class StandardSQLFunction

Parameters:

firstArgumentType - The type of the first argument

arguments - The function arguments

factory - The SessionFactory

Returns:

The rendered function call

Throws:

QueryException - Indicates a problem rendering the function call.

determineJdbcTypeCode

protected final int determineJdbcTypeCode(Type firstArgumentType,
                                          SessionFactoryImplementor factory)
                                   throws QueryException

Throws:

QueryException

render

protected String render(int firstArgumentJdbcType,
                        String argument,
                        SessionFactoryImplementor factory)

renderArgument

protected String renderArgument(String argument,
                                int firstArgumentJdbcType)