org.h2.expression.analysis

类 WindowFrameBound

java.lang.Object

org.h2.expression.analysis.WindowFrameBound

public class WindowFrameBound
extends Object

Window frame bound.

构造器概要

构造器

构造器和说明
WindowFrameBound(WindowFrameBoundType type, Expression value) Creates new instance of window frame bound.

方法概要

限定符和类型	方法和说明
int	getExpressionIndex() Returns the index of preserved expression.
StringBuilder	getSQL(StringBuilder builder, boolean following, int sqlFlags) Appends SQL representation to the specified builder.
WindowFrameBoundType	getType() Returns the type
Expression	getValue() Returns the value.
boolean	isParameterized() Returns whether bound is defined as n PRECEDING or n FOLLOWING.
boolean	isVariable() Returns whether bound is defined with a variable.

从类继承的方法 java.lang.Object

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

构造器详细资料

WindowFrameBound

public WindowFrameBound(WindowFrameBoundType type,
                        Expression value)

Creates new instance of window frame bound.

参数:

type - bound type

value - bound value, if any

方法详细资料

getType

public WindowFrameBoundType getType()

Returns the type

返回:

the type

getValue

public Expression getValue()

Returns the value.

返回:

the value

isParameterized

public boolean isParameterized()

Returns whether bound is defined as n PRECEDING or n FOLLOWING.

返回:

whether bound is defined as n PRECEDING or n FOLLOWING

isVariable

public boolean isVariable()

Returns whether bound is defined with a variable. This method may be used only after optimize(SessionLocal) invocation.

返回:

whether bound is defined with a variable

getExpressionIndex

public int getExpressionIndex()

Returns the index of preserved expression.

返回:

the index of preserved expression, or -1

getSQL

public StringBuilder getSQL(StringBuilder builder,
                            boolean following,
                            int sqlFlags)

Appends SQL representation to the specified builder.

参数:

builder - string builder

following - if false return SQL for starting clause, if true return SQL for following clause

sqlFlags - formatting flags

返回:

the specified string builder

另请参阅:

Expression.getSQL(StringBuilder, int, int)