程序包 org.hibernate.query.criteria.internal.expression.function

接口 FunctionExpression<T>

类型参数:

T - The type of the function result.

所有超级接口:

javax.persistence.criteria.Expression<T>, javax.persistence.criteria.Selection<T>, javax.persistence.TupleElement<T>

所有已知实现类:

AbsFunction, AggregationFunction, AggregationFunction.AVG, AggregationFunction.COUNT, AggregationFunction.GREATEST, AggregationFunction.LEAST, AggregationFunction.MAX, AggregationFunction.MIN, AggregationFunction.SUM, BasicFunctionExpression, CastFunction, CurrentDateFunction, CurrentTimeFunction, CurrentTimestampFunction, LengthFunction, LocateFunction, LowerFunction, ParameterizedFunctionExpression, SqrtFunction, SubstringFunction, TrimFunction, UpperFunction

public interface FunctionExpression<T>
extends javax.persistence.criteria.Expression<T>

Contract for expressions which model a SQL function call.

作者:

Steve Ebersole

方法概要

修饰符和类型	方法	说明
String	getFunctionName()	Retrieve the name of the function.
boolean	isAggregation()	Is this function a value aggregator (like a COUNT or MAX function e.g.)?

从接口继承的方法 javax.persistence.criteria.Expression

as, in, in, in, in, isNotNull, isNull

从接口继承的方法 javax.persistence.criteria.Selection

alias, getCompoundSelectionItems, isCompoundSelection

从接口继承的方法 javax.persistence.TupleElement

getAlias, getJavaType

方法详细资料

getFunctionName

String getFunctionName()

Retrieve the name of the function.

返回:

The function name.

isAggregation

boolean isAggregation()

Is this function a value aggregator (like a COUNT or MAX function e.g.)?

返回:

True if this functions does aggregation.