org.h2.expression.analysis

Class WindowFrameBound

java.lang.Object

org.h2.expression.analysis.WindowFrameBound

public class WindowFrameBound
extends java.lang.Object

Window frame bound.

Constructor Summary

Constructors

Constructor and Description
WindowFrameBound(WindowFrameBoundType type, Expression value) Creates new instance of window frame bound.

Method Summary

Modifier and Type	Method and Description
int	getExpressionIndex() Returns the index of preserved expression.
java.lang.StringBuilder	getSQL(java.lang.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.

Methods inherited from class java.lang.Object

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

Constructor Detail

WindowFrameBound

public WindowFrameBound(WindowFrameBoundType type,
                        Expression value)

Creates new instance of window frame bound.

Parameters:

type - bound type

value - bound value, if any

Method Detail

getType

public WindowFrameBoundType getType()

Returns the type

Returns:

the type

getValue

public Expression getValue()

Returns the value.

Returns:

the value

isParameterized

public boolean isParameterized()

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

Returns:

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.

Returns:

whether bound is defined with a variable

getExpressionIndex

public int getExpressionIndex()

Returns the index of preserved expression.

Returns:

the index of preserved expression, or -1

getSQL

public java.lang.StringBuilder getSQL(java.lang.StringBuilder builder,
                                      boolean following,
                                      int sqlFlags)

Appends SQL representation to the specified builder.

Parameters:

builder - string builder

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

sqlFlags - formatting flags

Returns:

the specified string builder

See Also:

Expression.getSQL(StringBuilder, int, int)