org.apache.derby.impl.sql.compile
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:

Node, Visitable

public final class WindowDefinitionNode
extends WindowNode

This class represents an OLAP window definition.

Field Summary

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

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, isPrivilegeCollectionRequired

Constructor Summary

WindowDefinitionNode()

Method Summary

WindowDefinitionNode	findEquivalentWindow(WindowList wl) Used to merge equivalent window definitions.
OrderByList	getOrderByList()
void	init(java.lang.Object arg1, java.lang.Object arg2) Initializer.
private boolean	isEquivalent(WindowDefinitionNode other)
void	printSubNodes(int depth) QueryTreeNode override.
java.lang.String	toString() java.lang.Object override.

Methods inherited from class org.apache.derby.impl.sql.compile.WindowNode

getName, init

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

accept, acceptChildren, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, foundString, generate, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, init, init, isAtomic, isInstanceOf, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, orReliability, parseStatement, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, stackPrint, treePrint, treePrint, verifyClassExist

Methods inherited from class java.lang.Object

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

Field Detail

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 Detail

WindowDefinitionNode

public WindowDefinitionNode()

Method Detail

init

public void init(java.lang.Object arg1,
                 java.lang.Object arg2)
          throws StandardException

Initializer.

Specified by:

init in interface Node

Overrides:

init in class QueryTreeNode

Parameters:

arg1 - The window name, null if in-lined definition

arg2 - ORDER BY list

Throws:

StandardException

toString

public java.lang.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

public 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

public OrderByList getOrderByList()

Returns:

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