Class WindowDefinitionNode

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.WindowNode

org.apache.derby.impl.sql.compile.WindowDefinitionNode

All Implemented Interfaces:

Visitable

public final class WindowDefinitionNode
extends WindowNode

This class represents an OLAP window definition.

Field Summary

Fields

Modifier and Type	Field	Description
private boolean	inlined	True of the window definition was inlined.
private OrderByList	orderByList	The order by list if the window definition contains a , else null.

Fields inherited from class QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor	Description
WindowDefinitionNode(String windowName, OrderByList orderByList, ContextManager cm)	Constructor.

Method Summary

Modifier and Type	Method	Description
(package private) WindowDefinitionNode	findEquivalentWindow(WindowList wl)	Used to merge equivalent window definitions.
(package private) OrderByList	getOrderByList()
private boolean	isEquivalent(WindowDefinitionNode other)
void	printSubNodes(int depth)	QueryTreeNode override.
String	toString()	java.lang.Object override.

Methods inherited from class WindowNode

getName

Methods inherited from class QueryTreeNode

accept, acceptChildren, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, generate, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContext, getContextManager, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getLongProperty, getNullNode, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, getUDTDesc, isAtomic, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, optimizerTracingIsOn, orReliability, parseSearchCondition, parseStatement, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist

Methods inherited from class Object

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

Field Details

inlined

private boolean inlined

True of the window definition was inlined.

orderByList

private OrderByList orderByList

The order by list if the window definition contains a , else null.

Constructor Details

WindowDefinitionNode

WindowDefinitionNode(String windowName,
 OrderByList orderByList,
 ContextManager cm)
              throws StandardException

Constructor.

Parameters:

windowName - The window name, null if in-lined definition

orderByList - ORDER BY list

cm - The context manager

Throws:

StandardException

Method Details

toString

public String toString()

java.lang.Object override.

Overrides:

toString in class QueryTreeNode

Returns:

This node formatted as a String

See Also:

• QueryTreeNode.toString()

printSubNodes

public void printSubNodes(int depth)

QueryTreeNode override. Prints the sub-nodes of this object.

Overrides:

printSubNodes in class QueryTreeNode

Parameters:

depth - The depth of this node in the tree

See Also:

• QueryTreeNode.printSubNodes(int)

findEquivalentWindow

WindowDefinitionNode findEquivalentWindow(WindowList wl)

Used to merge equivalent window definitions.

Parameters:

wl - list of window definitions

Returns:

an existing window definition from wl, if 'this' is equivalent to a window in wl.

isEquivalent

private boolean isEquivalent(WindowDefinitionNode other)

Returns:

true if the window specifications are equal; no need to create more than one window then.

getOrderByList

OrderByList getOrderByList()

Returns:

the order by list of this window definition if any, else null.