public final class CurrentOfNode extends FromTable
ResultSetNode.QueryExpressionClauses
Modifier and Type | Field and Description |
---|---|
private TableName |
baseTableName |
private java.lang.String |
cursorName |
private FromBaseTable |
dummyTargetTable |
private TableName |
exposedTableName |
private ExecPreparedStatement |
preStmt |
private CostEstimate |
singleScanCostEstimate |
ADD_PLAN, bestAccessPath, bestCostEstimate, bestSortAvoidancePath, correlationName, corrTableName, currentAccessPath, hashKeyColumns, initialCapacity, level, LOAD_PLAN, loadFactor, maxCapacity, origTableName, REMOVE_PLAN, tableNumber, tableProperties, trulyTheBestAccessPath, userSpecifiedJoinStrategy
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
CurrentOfNode(java.lang.String correlationName,
java.lang.String cursor,
java.util.Properties tableProperties,
ContextManager cm) |
Modifier and Type | Method and Description |
---|---|
(package private) void |
acceptChildren(Visitor v)
Accept the visitor for all visitable children of this node.
|
(package private) void |
bindExpressions(FromList fromListParam)
Bind the expressions in this ResultSetNode.
|
(package private) ResultSetNode |
bindNonVTITables(DataDictionary dataDictionary,
FromList fromListParam)
Binding this FromTable means finding the prepared statement
for the cursor and creating the result columns (the columns
updatable on that cursor).
|
CostEstimate |
estimateCost(OptimizablePredicateList predList,
ConglomerateDescriptor cd,
CostEstimate outerCost,
Optimizer optimizer,
RowOrdering rowOrdering)
Estimate the cost of scanning this Optimizable using the given
predicate list with the given conglomerate.
|
(package private) void |
generate(ActivationClassBuilder acb,
MethodBuilder mb)
Generation on a CurrentOfNode creates a scan on the
cursor, CurrentOfResultSet.
|
(package private) TableName |
getBaseCursorTargetTableName() |
(package private) java.lang.String |
getCursorName() |
(package private) ExecPreparedStatement |
getCursorStatement()
Return the CursorNode associated with a positioned update/delete.
|
(package private) java.lang.String |
getExposedName()
Get the exposed name for this table, which is the name that can
be used to refer to it in the rest of the query.
|
(package private) TableName |
getExposedTableName() |
(package private) ResultColumn |
getMatchingColumn(ColumnReference columnReference)
Try to find a ResultColumn in the table represented by this CurrentOfNode
that matches the name in the given ColumnReference.
|
(package private) static CurrentOfNode |
makeForMerge(java.lang.String cursorName,
FromBaseTable dummyTargetTable,
ContextManager cm)
Construct a dummy CurrentOfNode just for compiling the DELETE action of a MERGE
statement.
|
(package private) ResultSetNode |
optimize(DataDictionary dataDictionary,
PredicateList predicateList,
double outerRows)
Optimize this CurrentOfNode.
|
(package private) ResultSetNode |
preprocess(int numTables,
GroupByList gbl,
FromList fromList)
Preprocess a CurrentOfNode.
|
(package private) void |
printSubNodes(int depth)
Prints the sub-nodes of this object.
|
java.lang.String |
toString()
Convert this object to a String.
|
int |
updateTargetLockMode()
Get the lock mode for this table as the target of an update statement
(a delete or update).
|
assignCostEstimate, canBeOrdered, columnsAreUpdatable, considerSortAvoidancePath, convertAbsoluteToRelativeColumnPosition, cursorTargetTable, decrementLevel, feasibleJoinStrategy, fillInReferencedTableMap, flatten, forUpdate, getBaseTableName, getBestAccessPath, getBestSortAvoidancePath, getCorrelationName, getCostEstimate, getCurrentAccessPath, getFinalCostEstimate, getFromTableByName, getLevel, getMergeTableID, getName, getNumColumnsReturned, getOrigTableName, getProperties, getResultColumnsForList, getSchemaDescriptor, getSchemaDescriptor, getScratchCostEstimate, getTableDescriptor, getTableName, getTableNumber, getTrulyTheBestAccessPath, getUserSpecifiedJoinStrategy, hashKeyColumns, hasLargeObjectColumns, hasTableNumber, initAccessPaths, initialCapacity, isBaseTable, isCoveringIndex, isFlattenableJoinNode, isJoinColumnForRightOuterJoin, isMaterializable, isOneRowScan, isTargetTable, legalJoinOrder, loadFactor, LOJ_reorderable, markUpdatableByCursor, maxCapacity, memoryUsageOK, modifyAccessPath, needsSpecialRCLBinding, nextAccessPath, optimizeIt, optimizeSubqueries, pullOptPredicates, pushExpressions, pushOptPredicate, rememberAsBest, rememberJoinStrategyAsBest, rememberSortAvoidancePath, resetJoinStrategies, setCostEstimateCost, setHashKeyColumns, setLevel, setMergeTableID, setOrigTableName, setProperties, setTableNumber, startOptimizing, supportsMultipleInstantiations, tellRowOrderingAboutConstantColumns, transformOuterJoins, uniqueJoin, updateBestPlanMap, verifyProperties
addNewPredicate, adjustForSortElimination, adjustForSortElimination, assignResultSetNumber, bindExpressionsWithTables, bindResultColumns, bindResultColumns, bindTargetExpressions, bindUntypedNullsToResultColumns, bindVTITables, changeAccessPath, columnTypesAndLengthsMatch, considerMaterialization, enhanceRCLForInsert, ensurePredicateList, flattenableInFromSubquery, generateNormalizationResultSet, generateResultSet, genProjectRestrict, genProjectRestrict, genProjectRestrictForReordering, getAllResultColumns, getCandidateFinalCostEstimate, getCostEstimate, getCursorTargetTable, getFromList, getNewCostEstimate, getOptimizer, getOptimizerImpl, getRCLForInsert, getReferencedTableMap, getResultColumns, getResultSetNumber, getScratchCostEstimate, isCursorTargetTable, isInsertSource, isNotExists, isOneRowResultSet, isOrderedOn, isPossibleDistinctScan, isStatementResultSet, isUpdatableCursor, LOJgetReferencedTables, makeResultDescription, makeResultDescriptors, markAsCursorTargetTable, markForDistinctScan, markStatementResultSet, modifyAccessPaths, modifyAccessPaths, notCursorTargetTable, notFlattenableJoin, numDistinctAggregates, parseDefault, performMaterialization, printQueryExpressionSuffixClauses, projectResultColumns, pushOffsetFetchFirst, pushOrderByList, pushQueryExpressionSuffix, referencesTarget, rejectParameters, rejectXMLValues, renameGeneratedResultNames, replaceOrForbidDefaults, returnsAtMostOneRow, setCandidateFinalCostEstimate, setCostEstimate, setCursorTargetTable, setInsertSource, setOptimizer, setReferencedTableMap, setResultColumns, setResultSetNumber, setResultToBooleanTrueNode, setScratchCostEstimate, setTableConstructorTypes, subqueryReferencesTarget, verifySelectStarSubquery
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, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait
getDataDictionary, getOptimizerTracer, getReferencedTableMap, getResultSetNumber, optimizerTracingIsOn
accept, addTag, taggedWith
private java.lang.String cursorName
private ExecPreparedStatement preStmt
private TableName exposedTableName
private TableName baseTableName
private CostEstimate singleScanCostEstimate
private FromBaseTable dummyTargetTable
CurrentOfNode(java.lang.String correlationName, java.lang.String cursor, java.util.Properties tableProperties, ContextManager cm)
static CurrentOfNode makeForMerge(java.lang.String cursorName, FromBaseTable dummyTargetTable, ContextManager cm)
Construct a dummy CurrentOfNode just for compiling the DELETE action of a MERGE statement.
public CostEstimate estimateCost(OptimizablePredicateList predList, ConglomerateDescriptor cd, CostEstimate outerCost, Optimizer optimizer, RowOrdering rowOrdering) throws StandardException
Optimizable
estimateCost
in interface Optimizable
estimateCost
in class FromTable
predList
- The predicate list to optimize againstcd
- The conglomerate descriptor to get the cost ofouterCost
- The estimated cost of the part of the plan outer
to this optimizable.optimizer
- The optimizer to use to help estimate the costrowOrdering
- The row ordering for all the tables in the
join order, including this one.StandardException
- Thrown on errorOptimizable.estimateCost(org.apache.derby.iapi.sql.compile.OptimizablePredicateList, org.apache.derby.iapi.sql.dictionary.ConglomerateDescriptor, org.apache.derby.iapi.sql.compile.CostEstimate, org.apache.derby.iapi.sql.compile.Optimizer, org.apache.derby.iapi.sql.compile.RowOrdering)
ResultSetNode bindNonVTITables(DataDictionary dataDictionary, FromList fromListParam) throws StandardException
bindNonVTITables
in class ResultSetNode
dataDictionary
- The DataDictionary to use for bindingfromListParam
- FromList to use/append to.StandardException
- Thrown on errorvoid bindExpressions(FromList fromListParam)
bindExpressions
in class ResultSetNode
fromListParam
- FromList to use/append to.ResultColumn getMatchingColumn(ColumnReference columnReference) throws StandardException
getMatchingColumn
in class ResultSetNode
columnReference
- The columnReference whose name we're looking
for in the given table.StandardException
- Thrown on errorResultSetNode preprocess(int numTables, GroupByList gbl, FromList fromList) throws StandardException
preprocess
in class ResultSetNode
numTables
- The number of tables in the DML Statementgbl
- The group by list, if anyfromList
- The from list, if anyStandardException
- Thrown on errorResultSetNode optimize(DataDictionary dataDictionary, PredicateList predicateList, double outerRows) throws StandardException
optimize
in class ResultSetNode
dataDictionary
- The DataDictionary to use for optimizationpredicateList
- The PredicateList to optimize. This should
be a single-table predicate with the table
the same as the table in this FromTable.outerRows
- The number of outer joining rowsStandardException
- Thrown on errorvoid generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException
This routine will generate and return a call of the form:
ResultSetFactory.getCurrentOfResultSet(cursorName)
generate
in class QueryTreeNode
acb
- The ActivationClassBuilder for the class being builtmb
- The execute() method to be builtStandardException
- Thrown on errorvoid printSubNodes(int depth)
printSubNodes
in class ResultSetNode
depth
- The depth of this node in the treepublic java.lang.String toString()
java.lang.String getExposedName()
FromTable
getExposedName
in class FromTable
public int updateTargetLockMode()
updateTargetLockMode
in class ResultSetNode
TransactionController
TableName getExposedTableName()
TableName getBaseCursorTargetTableName()
java.lang.String getCursorName()
ExecPreparedStatement getCursorStatement()
void acceptChildren(Visitor v) throws StandardException
ResultSetNode
acceptChildren
in class FromTable
v
- the visitorStandardException
- on errorApache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.