Class WindowResultSetNode
java.lang.Object
org.apache.derby.impl.sql.compile.QueryTreeNode
org.apache.derby.impl.sql.compile.ResultSetNode
org.apache.derby.impl.sql.compile.FromTable
org.apache.derby.impl.sql.compile.SingleChildResultSetNode
org.apache.derby.impl.sql.compile.WindowResultSetNode
- All Implemented Interfaces:
Optimizable
,Visitable
A WindowResultSetNode represents a result set for a window partitioning on a
select. Modeled on the code in GroupByNode.
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Nested Class Summary
Nested classes/interfaces inherited from class org.apache.derby.impl.sql.compile.ResultSetNode
ResultSetNode.QueryExpressionClauses
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Field Summary
FieldsModifier and TypeFieldDescription(package private) FromTable
The parent to the WindowResultSetNode.(package private) WindowDefinitionNode
(package private) List
<WindowFunctionNode> Fields inherited from class org.apache.derby.impl.sql.compile.SingleChildResultSetNode
childResult, hasTrulyTheBestAccessPath
Fields inherited from class org.apache.derby.impl.sql.compile.FromTable
ADD_PLAN, bestAccessPath, bestCostEstimate, bestSortAvoidancePath, correlationName, corrTableName, currentAccessPath, hashKeyColumns, initialCapacity, level, LOAD_PLAN, loadFactor, maxCapacity, origTableName, REMOVE_PLAN, tableNumber, tableProperties, trulyTheBestAccessPath, userSpecifiedJoinStrategy
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
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Constructor Summary
ConstructorsConstructorDescriptionWindowResultSetNode
(ResultSetNode bottomPR, WindowDefinitionNode windowDef, List<WindowFunctionNode> windowFuncCalls, int nestingLevel, ContextManager cm) Constructor for a WindowResultSetNode. -
Method Summary
Modifier and TypeMethodDescriptionprivate void
Substitute new result columns for window function calls and add the result columns to childResult's list of columns.private void
Add a new PR node.private boolean
colRefAlreadySeen
(List<ValueNode> uniqueColRefs, ColumnReference cand) (package private) void
generate
(ActivationClassBuilder acb, MethodBuilder mb) Do the code generation for this node.(package private) final FromTable
void
printSubNodes
(int depth) QueryTreeNode overrideMethods inherited from class org.apache.derby.impl.sql.compile.SingleChildResultSetNode
acceptChildren, addNewPredicate, adjustForSortElimination, adjustForSortElimination, changeAccessPath, decrementLevel, ensurePredicateList, flattenableInFromSubquery, forUpdate, getChildResult, getFinalCostEstimate, getFromTableByName, getTrulyTheBestAccessPath, initAccessPaths, isNotExists, isOneRowResultSet, isOrderedOn, modifyAccessPaths, optimize, preprocess, pullOptPredicates, pushExpressions, referencesSessionSchema, referencesTarget, reflectionNeededForProjection, setChildResult, setLevel, subqueryReferencesTarget, updateBestPlanMap, updateTargetLockMode
Methods inherited from class org.apache.derby.impl.sql.compile.FromTable
assignCostEstimate, canBeOrdered, columnsAreUpdatable, considerSortAvoidancePath, convertAbsoluteToRelativeColumnPosition, cursorTargetTable, estimateCost, feasibleJoinStrategy, fillInReferencedTableMap, flatten, getBaseTableName, getBestAccessPath, getBestSortAvoidancePath, getCorrelationName, getCostEstimate, getCurrentAccessPath, getExposedName, getLevel, getMergeTableID, getName, getNumColumnsReturned, getOrigTableName, getProperties, getResultColumnsForList, getSchemaDescriptor, getSchemaDescriptor, getScratchCostEstimate, getTableDescriptor, getTableName, getTableNumber, getUserSpecifiedJoinStrategy, hashKeyColumns, hasLargeObjectColumns, hasTableNumber, initialCapacity, isBaseTable, isCoveringIndex, isFlattenableJoinNode, isJoinColumnForRightOuterJoin, isMaterializable, isOneRowScan, isTargetTable, legalJoinOrder, loadFactor, LOJ_reorderable, markUpdatableByCursor, maxCapacity, memoryUsageOK, modifyAccessPath, needsSpecialRCLBinding, nextAccessPath, optimizeIt, optimizeSubqueries, pushOptPredicate, rememberAsBest, rememberJoinStrategyAsBest, rememberSortAvoidancePath, resetJoinStrategies, setCostEstimateCost, setHashKeyColumns, setMergeTableID, setOrigTableName, setProperties, setTableNumber, startOptimizing, supportsMultipleInstantiations, tellRowOrderingAboutConstantColumns, toString, transformOuterJoins, uniqueJoin, verifyProperties
Methods inherited from class org.apache.derby.impl.sql.compile.ResultSetNode
assignResultSetNumber, bindExpressions, bindExpressionsWithTables, bindNonVTITables, bindResultColumns, bindResultColumns, bindTargetExpressions, bindUntypedNullsToResultColumns, bindVTITables, columnTypesAndLengthsMatch, considerMaterialization, enhanceRCLForInsert, generateNormalizationResultSet, generateResultSet, genProjectRestrict, genProjectRestrict, genProjectRestrictForReordering, getAllResultColumns, getCandidateFinalCostEstimate, getCostEstimate, getCursorTargetTable, getFromList, getMatchingColumn, getNewCostEstimate, getOptimizer, getOptimizerImpl, getRCLForInsert, getReferencedTableMap, getResultColumns, getResultSetNumber, getScratchCostEstimate, isCursorTargetTable, isInsertSource, isPossibleDistinctScan, isStatementResultSet, isUpdatableCursor, LOJgetReferencedTables, makeResultDescription, makeResultDescriptors, markAsCursorTargetTable, markForDistinctScan, markStatementResultSet, modifyAccessPaths, notCursorTargetTable, notFlattenableJoin, numDistinctAggregates, parseDefault, performMaterialization, printQueryExpressionSuffixClauses, projectResultColumns, pushOffsetFetchFirst, pushOrderByList, pushQueryExpressionSuffix, rejectParameters, rejectXMLValues, renameGeneratedResultNames, replaceOrForbidDefaults, returnsAtMostOneRow, setCandidateFinalCostEstimate, setCostEstimate, setCursorTargetTable, setInsertSource, setOptimizer, setReferencedTableMap, setResultColumns, setResultSetNumber, setResultToBooleanTrueNode, setScratchCostEstimate, setTableConstructorTypes, verifySelectStarSubquery
Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
accept, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, 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, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
Methods inherited from interface org.apache.derby.iapi.sql.compile.Optimizable
getDataDictionary, getOptimizerTracer, getReferencedTableMap, getResultSetNumber, optimizerTracingIsOn
Methods inherited from interface org.apache.derby.iapi.sql.compile.Visitable
accept, addTag, taggedWith
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Field Details
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parent
FromTable parentThe parent to the WindowResultSetNode. We generate a ProjectRestrict over the windowing node and parent is set to that node. -
windowFuncCalls
List<WindowFunctionNode> windowFuncCalls -
wdn
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Constructor Details
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WindowResultSetNode
WindowResultSetNode(ResultSetNode bottomPR, WindowDefinitionNode windowDef, List<WindowFunctionNode> windowFuncCalls, int nestingLevel, ContextManager cm) throws StandardException Constructor for a WindowResultSetNode.- Parameters:
bottomPR
- The project restrict result set we want to wrapwindowDef
- The window definitionwindowFuncCalls
- All window function calls in SELECT's select list and order by list.nestingLevel
- Nesting levelcm
- The context manager- Throws:
StandardException
- Thrown on error
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Method Details
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addNewPRNode
Add a new PR node. Put the new PR under any sort.- Throws:
StandardException
- standard error policy
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colRefAlreadySeen
private boolean colRefAlreadySeen(List<ValueNode> uniqueColRefs, ColumnReference cand) throws StandardException - Parameters:
uniqueColRefs
- list of unique column referencescand
- the candidate to check is present in list- Returns:
true
if an equivalent column reference tocand
is already present inuniqueColRefs
- Throws:
StandardException
- standard error policy
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addNewColumns
Substitute new result columns for window function calls and add the result columns to childResult's list of columns.- Throws:
StandardException
- standard error policy
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generate
Description copied from class:QueryTreeNode
Do the code generation for this node. This is a place-holder method - it should be over-ridden in the sub-classes.- Overrides:
generate
in classQueryTreeNode
- Parameters:
acb
- The ActivationClassBuilder for the class being builtmb
- The method for the generated code to go into- Throws:
StandardException
- Thrown on error
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getParent
- Returns:
- parent of this node, a PRN, used by SelectNode to retrieve new top result set node after window result set rewrite of result set tree.
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printSubNodes
public void printSubNodes(int depth) QueryTreeNode override- Overrides:
printSubNodes
in classSingleChildResultSetNode
- Parameters:
depth
- The depth of this node in the tree- See Also:
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