Modifier and Type | Class and Description |
---|---|
static class |
XMLOptTrace.QueryBlock |
Modifier and Type | Field and Description |
---|---|
private ContextManager |
_cm |
private XMLOptTrace.QueryBlock |
_currentQueryBlock |
private org.w3c.dom.Element |
_currentStatement |
private int |
_currentStatementID |
private org.w3c.dom.Document |
_doc |
private LanguageConnectionContext |
_lcc |
private int |
_maxQueryID |
private java.util.Stack<XMLOptTrace.QueryBlock> |
_queryBlockStack |
private org.w3c.dom.Element |
_root |
private static java.lang.String |
CE_ESTIMATED_COST |
private static java.lang.String |
CE_ROW_COUNT |
private static java.lang.String |
CE_SINGLE_SCAN_ROW_COUNT |
private static java.lang.String |
DECORATION |
private static java.lang.String |
DECORATION_CONGLOM_COST |
private static java.lang.String |
DECORATION_CONGLOM_NAME |
private static java.lang.String |
DECORATION_EXTRA_NON_QUALIFIERS |
private static java.lang.String |
DECORATION_EXTRA_QUALIFIERS |
private static java.lang.String |
DECORATION_EXTRA_START_STOP_SELECTIVITY |
private static java.lang.String |
DECORATION_FIRST_COLUMN_SELECTIVITY |
private static java.lang.String |
DECORATION_JOIN_STRATEGY |
private static java.lang.String |
DECORATION_KEY |
private static java.lang.String |
DECORATION_SKIP |
private static java.lang.String |
DECORATION_START_STOP_SELECTIVITY |
private static java.lang.String |
DECORATION_TABLE_NAME |
private static java.lang.String |
JO |
private static java.lang.String |
JO_COMPLETE |
private static java.lang.String |
JO_SLOT |
private static java.lang.String |
PC |
private static java.lang.String |
PC_AVOID_SORT |
private static java.lang.String |
PC_COMPLETE |
private static java.lang.String |
PC_SUMMARY |
private static java.lang.String |
PC_TYPE |
(package private) static java.lang.String |
PLAN_COST_VIEW |
(package private) static java.lang.String |
PLAN_COST_VTI |
private static java.lang.String |
QBLOCK |
private static java.lang.String |
QBLOCK_ID |
private static java.lang.String |
QBLOCK_NO_BEST_PLAN |
private static java.lang.String |
QBLOCK_OPT_TABLE_NUMBER |
private static java.lang.String |
QBLOCK_OPTIMIZABLE |
private static java.lang.String |
QBLOCK_OPTIMIZER_ID |
private static java.lang.String |
QBLOCK_SKIP |
private static java.lang.String |
QBLOCK_SORT_COST |
private static java.lang.String |
QBLOCK_START_TIME |
private static java.lang.String |
QBLOCK_TIMEOUT |
private static java.lang.String |
QBLOCK_TOTAL_COST |
private static java.lang.String |
QBLOCK_VACUOUS |
private static java.lang.String |
SEL_COUNT |
private static java.lang.String |
SEL_SELECTIVITY |
private static java.lang.String |
SKIP_REASON |
private static java.lang.String |
STMT |
private static java.lang.String |
STMT_ID |
private static java.lang.String |
STMT_TEXT |
private static java.lang.String |
TABLE_FUNCTION_FLAG |
Constructor and Description |
---|
XMLOptTrace()
0-arg constructor required by OptTrace contract
|
Modifier and Type | Method and Description |
---|---|
private org.w3c.dom.Element |
createElement(org.w3c.dom.Element parent,
java.lang.String tag,
java.lang.String content)
Create an element and add it to a parent
|
private void |
formatCost(org.w3c.dom.Element costElement,
CostEstimate raw)
Format a CostEstimate as subelements of a parent
|
private void |
formatJoinOrder(org.w3c.dom.Element parent,
int[] proposedJoinOrder)
Format a join order list
|
private org.w3c.dom.Element |
formatPlanCost(org.w3c.dom.Element parent,
java.lang.String type,
int[] planOrder,
int planType,
CostEstimate raw)
Turn a CostEstimate for a join order into a human-readable element
|
private java.lang.String |
formatPlanSummary(int[] planOrder,
int planType)
Produce a string representation of the plan being considered now.
|
private void |
formatSelectivity(org.w3c.dom.Element parent,
java.lang.String tag,
int count,
double selectivity)
Format selectivity subelement
|
private org.w3c.dom.Element |
formatSkip(org.w3c.dom.Element parent,
java.lang.String skipTag,
java.lang.String reason)
Create an element explaining that we're skipping some processing
|
private java.lang.String |
formatTimestamp(long timestamp)
Turn a timestamp into a human-readable string
|
private Optimizable |
getOptimizable(int tableNumber)
Get the Optimizable with the given tableNumber
|
private TableName |
getOptimizableName(Optimizable optimizable)
Get the name of an optimizable
|
private boolean |
isBaseTable(Optimizable optimizable)
Return true if the optimizable is a base table
|
private boolean |
isComplete(int[] joinOrder)
Return true if the join order has been completely filled in
|
private boolean |
isFromTable(Optimizable optimizable)
Return true if the optimizable is a FromTable
|
private TableName |
makeTableName(java.lang.String schemaName,
java.lang.String unqualifiedName,
ContextManager cm)
Make a TableName
|
private void |
printThrowable(java.lang.Throwable t)
Print an exception to the log file
|
void |
printToWriter(java.io.PrintWriter out)
Print the trace so far.
|
void |
traceAddingUnorderedOptimizable(int predicateCount)
Say that we're adding an unordered optimizable.
|
void |
traceChangingAccessPathForTable(int tableNumber)
Say that we're considering a different access path for a table.
|
void |
traceCheapestPlanSoFar(int planType,
CostEstimate currentCost)
Report the cost of the cheapest plan so far.
|
void |
traceCompleteJoinOrder()
Say that we have a complete join order.
|
void |
traceCompositeSelectivityFromStatistics(double statCompositeSelectivity)
Report the selectivity calculated from SYSSTATISTICS.
|
void |
traceConsideringConglomerate(ConglomerateDescriptor cd,
int tableNumber)
Report that we are considering a conglomerate for a table.
|
void |
traceConsideringJoinStrategy(JoinStrategy js,
int tableNumber)
Say that we're considering a particular join strategy on a particular table.
|
void |
traceConstantStartStopPositions()
Say that we're setting the lock mode to MODE_RECORD because the start and stop positions are all constant.
|
void |
traceCostIncludingCompositeSelectivityFromStats(CostEstimate cost,
int tableNumber)
Report the cost based on selectivities coming out of SYSSTATISTICS.
|
void |
traceCostIncludingExtra1stColumnSelectivity(CostEstimate cost,
int tableNumber)
Report the cost of a scan given the selectivity of an extra first column.
|
void |
traceCostIncludingExtraNonQualifierSelectivity(CostEstimate cost,
int tableNumber)
Report the cost if we include an extra non-qualifier.
|
void |
traceCostIncludingExtraQualifierSelectivity(CostEstimate cost,
int tableNumber)
Report the cost if we include an extra qualifier.
|
void |
traceCostIncludingExtraStartStop(CostEstimate cost,
int tableNumber)
Report the cost if we include an extra start/stop.
|
void |
traceCostIncludingStatsForIndex(CostEstimate cost,
int tableNumber)
Report the cost based on index statistics.
|
void |
traceCostOfConglomerateScan(int tableNumber,
ConglomerateDescriptor cd,
CostEstimate costEstimate,
int numExtraFirstColumnPreds,
double extraFirstColumnSelectivity,
int numExtraStartStopPreds,
double extraStartStopSelectivity,
int startStopPredCount,
double statStartStopSelectivity,
int numExtraQualifiers,
double extraQualifierSelectivity,
int numExtraNonQualifiers,
double extraNonQualifierSelectivity)
Report the cost of a conglomerate scan.
|
void |
traceCostOfNoncoveringIndex(CostEstimate cost,
int tableNumber)
Report the cost of using a non-covering index.
|
void |
traceCostOfNScans(int tableNumber,
double rowCount,
CostEstimate cost)
Report the cost of scanning a table a certain number of times
|
void |
traceCostWithoutSortAvoidance(CostEstimate currentCost)
Report the cost without a sort.
|
void |
traceCostWithSortAvoidance(CostEstimate currentSortAvoidanceCost)
Report the cost with sort avoidance.
|
void |
traceCurrentPlanAvoidsSort(CostEstimate bestCost,
CostEstimate currentSortAvoidanceCost)
Say that the current plan avoids a sort.
|
void |
traceEndQueryBlock()
End tracing the optimization of a query block.
|
void |
traceEstimatingCostOfConglomerate(ConglomerateDescriptor cd,
int tableNumber)
Report the cost of using a particular conglomerate to scan a table.
|
void |
traceHashKeyColumns(int[] hashKeyColumns)
Report the columns being traced
|
void |
traceIllegalUserJoinOrder()
Say that the user specified an impossible join order.
|
void |
traceJoinOrderConsideration(int joinPosition,
int[] proposedJoinOrder,
JBitSet assignedTableMap)
Say that we're considering a join order.
|
void |
traceLookingForSpecifiedIndex(java.lang.String indexName,
int tableNumber)
Say that we're looking for an index specified by optimizer hints.
|
void |
traceModifyingAccessPaths(int optimizerID)
Say that we're modifying access paths.
|
void |
traceNextAccessPath(java.lang.String baseTable,
int predicateCount)
Report that we are advancing to the next access path for the table.
|
void |
traceNoBestPlan()
Say that we couldn't find a best plan.
|
void |
traceNoMoreConglomerates(int tableNumber)
Say that we have exhausted the conglomerate possibilities for a table.
|
void |
traceNonCoveringIndexCost(double cost,
int tableNumber)
Say that we're considering a non-covering index.
|
void |
traceNoStartStopPosition()
Say that we're setting the lock mode to MODE_TABLE because there is no start/stop position.
|
void |
traceOptimizingJoinNode()
Say that we're starting to optimize a join node
|
void |
traceRememberingBestAccessPath(AccessPath accessPath,
int tableNumber,
int planType)
Report that we've found a best access path.
|
void |
traceRememberingBestAccessPathSubstring(AccessPath ap,
int tableNumber)
Report the best access path for the table so far.
|
void |
traceRememberingBestJoinOrder(int joinPosition,
int[] bestJoinOrder,
int planType,
CostEstimate planCost,
JBitSet assignedTableMap)
Say that we are remembering the current plan as the best join order so far.
|
void |
traceRememberingBestSortAvoidanceAccessPathSubstring(AccessPath ap,
int tableNumber)
Report the best sort-avoiding access path for this table so far.
|
void |
traceRememberingBestUnknownAccessPathSubstring(AccessPath ap,
int tableNumber)
Report an optimizer failure, e.g., while optimizing an outer join
|
void |
traceRememberingJoinStrategy(JoinStrategy joinStrategy,
int tableNumber)
Say that we've found a new best join strategy for the table.
|
void |
traceScanningHeapWithUniqueKey()
Say that we're considering scanning a heap even though we have a unique key match.
|
void |
traceShortCircuiting(boolean timeExceeded,
Optimizable thisOpt,
int joinPosition)
Say that we short-circuited a join order.
|
void |
traceSingleMatchedRowCost(double cost,
int tableNumber)
Report the cost of a scan which will match exactly one row.
|
void |
traceSkipHashJoinNoHashKeys()
Say we won't consider a hash join because there are no hash key columns.
|
void |
traceSkippingBecauseTooMuchMemory(int maxMemoryPerTable)
Say that we are skipping a plan because it consumes too much memory.
|
void |
traceSkippingJoinOrder(int nextOptimizable,
int joinPosition,
int[] proposedJoinOrder,
JBitSet assignedTableMap)
Say that we're skipping the join order starting with the next optimizable.
|
void |
traceSkipUnmaterializableHashJoin()
Say that we won't consider a hash join because the result can't be materialized
|
void |
traceSortCost(CostEstimate sortCost,
CostEstimate currentCost)
Report the sort cost.
|
void |
traceSortNeededForOrdering(int planType,
RequiredRowOrdering requiredRowOrdering)
Report that this plan needs a sort
|
void |
traceStartQueryBlock(long timeOptimizationStarted,
int optimizerID,
OptimizableList optimizableList)
Start optimizer tracing for a query block.
|
void |
traceStartStatement(java.lang.String statementText)
Start the start of tracing a statement.
|
void |
traceTimeout(long currentTime,
CostEstimate bestCost)
Say that the optimizer ran out of time.
|
void |
traceUserJoinOrderOptimized()
Say that we have optimized the user-specified join order.
|
void |
traceVacuous()
Say that there's nothing to optimizer.
|
private static final java.lang.String STMT
private static final java.lang.String STMT_ID
private static final java.lang.String STMT_TEXT
private static final java.lang.String QBLOCK
private static final java.lang.String QBLOCK_OPTIMIZER_ID
private static final java.lang.String QBLOCK_START_TIME
private static final java.lang.String QBLOCK_ID
private static final java.lang.String QBLOCK_OPTIMIZABLE
private static final java.lang.String QBLOCK_OPT_TABLE_NUMBER
private static final java.lang.String QBLOCK_TIMEOUT
private static final java.lang.String QBLOCK_VACUOUS
private static final java.lang.String QBLOCK_SORT_COST
private static final java.lang.String QBLOCK_TOTAL_COST
private static final java.lang.String QBLOCK_NO_BEST_PLAN
private static final java.lang.String QBLOCK_SKIP
private static final java.lang.String JO
private static final java.lang.String JO_COMPLETE
private static final java.lang.String JO_SLOT
private static final java.lang.String DECORATION
private static final java.lang.String DECORATION_CONGLOM_NAME
private static final java.lang.String DECORATION_KEY
private static final java.lang.String DECORATION_TABLE_NAME
private static final java.lang.String DECORATION_JOIN_STRATEGY
private static final java.lang.String DECORATION_SKIP
private static final java.lang.String DECORATION_CONGLOM_COST
private static final java.lang.String DECORATION_FIRST_COLUMN_SELECTIVITY
private static final java.lang.String DECORATION_EXTRA_START_STOP_SELECTIVITY
private static final java.lang.String DECORATION_START_STOP_SELECTIVITY
private static final java.lang.String DECORATION_EXTRA_QUALIFIERS
private static final java.lang.String DECORATION_EXTRA_NON_QUALIFIERS
private static final java.lang.String SKIP_REASON
private static final java.lang.String PC
private static final java.lang.String PC_TYPE
private static final java.lang.String PC_COMPLETE
private static final java.lang.String PC_AVOID_SORT
private static final java.lang.String PC_SUMMARY
private static final java.lang.String CE_ESTIMATED_COST
private static final java.lang.String CE_ROW_COUNT
private static final java.lang.String CE_SINGLE_SCAN_ROW_COUNT
private static final java.lang.String SEL_COUNT
private static final java.lang.String SEL_SELECTIVITY
private static final java.lang.String TABLE_FUNCTION_FLAG
static final java.lang.String PLAN_COST_VTI
static final java.lang.String PLAN_COST_VIEW
private org.w3c.dom.Document _doc
private org.w3c.dom.Element _root
private org.w3c.dom.Element _currentStatement
private int _currentStatementID
private XMLOptTrace.QueryBlock _currentQueryBlock
private int _maxQueryID
private java.util.Stack<XMLOptTrace.QueryBlock> _queryBlockStack
private ContextManager _cm
private LanguageConnectionContext _lcc
public XMLOptTrace() throws javax.xml.parsers.ParserConfigurationException
javax.xml.parsers.ParserConfigurationException
public void traceStartStatement(java.lang.String statementText)
OptTrace
traceStartStatement
in interface OptTrace
public void traceStartQueryBlock(long timeOptimizationStarted, int optimizerID, OptimizableList optimizableList)
OptTrace
traceStartQueryBlock
in interface OptTrace
public void traceEndQueryBlock()
OptTrace
traceEndQueryBlock
in interface OptTrace
public void traceTimeout(long currentTime, CostEstimate bestCost)
OptTrace
traceTimeout
in interface OptTrace
public void traceVacuous()
OptTrace
traceVacuous
in interface OptTrace
public void traceCompleteJoinOrder()
OptTrace
traceCompleteJoinOrder
in interface OptTrace
public void traceSortCost(CostEstimate sortCost, CostEstimate currentCost)
OptTrace
traceSortCost
in interface OptTrace
public void traceNoBestPlan()
OptTrace
traceNoBestPlan
in interface OptTrace
public void traceModifyingAccessPaths(int optimizerID)
OptTrace
traceModifyingAccessPaths
in interface OptTrace
public void traceShortCircuiting(boolean timeExceeded, Optimizable thisOpt, int joinPosition)
OptTrace
traceShortCircuiting
in interface OptTrace
public void traceSkippingJoinOrder(int nextOptimizable, int joinPosition, int[] proposedJoinOrder, JBitSet assignedTableMap)
OptTrace
traceSkippingJoinOrder
in interface OptTrace
public void traceIllegalUserJoinOrder()
OptTrace
traceIllegalUserJoinOrder
in interface OptTrace
public void traceUserJoinOrderOptimized()
OptTrace
traceUserJoinOrderOptimized
in interface OptTrace
public void traceJoinOrderConsideration(int joinPosition, int[] proposedJoinOrder, JBitSet assignedTableMap)
OptTrace
traceJoinOrderConsideration
in interface OptTrace
public void traceCostWithoutSortAvoidance(CostEstimate currentCost)
OptTrace
traceCostWithoutSortAvoidance
in interface OptTrace
public void traceCostWithSortAvoidance(CostEstimate currentSortAvoidanceCost)
OptTrace
traceCostWithSortAvoidance
in interface OptTrace
public void traceCurrentPlanAvoidsSort(CostEstimate bestCost, CostEstimate currentSortAvoidanceCost)
OptTrace
traceCurrentPlanAvoidsSort
in interface OptTrace
public void traceCheapestPlanSoFar(int planType, CostEstimate currentCost)
OptTrace
traceCheapestPlanSoFar
in interface OptTrace
public void traceSortNeededForOrdering(int planType, RequiredRowOrdering requiredRowOrdering)
OptTrace
traceSortNeededForOrdering
in interface OptTrace
public void traceRememberingBestJoinOrder(int joinPosition, int[] bestJoinOrder, int planType, CostEstimate planCost, JBitSet assignedTableMap)
OptTrace
traceRememberingBestJoinOrder
in interface OptTrace
public void traceSkippingBecauseTooMuchMemory(int maxMemoryPerTable)
OptTrace
traceSkippingBecauseTooMuchMemory
in interface OptTrace
public void traceCostOfNScans(int tableNumber, double rowCount, CostEstimate cost)
OptTrace
traceCostOfNScans
in interface OptTrace
public void traceSkipUnmaterializableHashJoin()
OptTrace
traceSkipUnmaterializableHashJoin
in interface OptTrace
public void traceSkipHashJoinNoHashKeys()
OptTrace
traceSkipHashJoinNoHashKeys
in interface OptTrace
public void traceHashKeyColumns(int[] hashKeyColumns)
OptTrace
traceHashKeyColumns
in interface OptTrace
public void traceOptimizingJoinNode()
OptTrace
traceOptimizingJoinNode
in interface OptTrace
public void traceConsideringJoinStrategy(JoinStrategy js, int tableNumber)
OptTrace
traceConsideringJoinStrategy
in interface OptTrace
public void traceRememberingBestAccessPath(AccessPath accessPath, int tableNumber, int planType)
OptTrace
traceRememberingBestAccessPath
in interface OptTrace
public void traceNoMoreConglomerates(int tableNumber)
OptTrace
traceNoMoreConglomerates
in interface OptTrace
public void traceConsideringConglomerate(ConglomerateDescriptor cd, int tableNumber)
OptTrace
traceConsideringConglomerate
in interface OptTrace
public void traceScanningHeapWithUniqueKey()
OptTrace
traceScanningHeapWithUniqueKey
in interface OptTrace
public void traceAddingUnorderedOptimizable(int predicateCount)
OptTrace
traceAddingUnorderedOptimizable
in interface OptTrace
public void traceChangingAccessPathForTable(int tableNumber)
OptTrace
traceChangingAccessPathForTable
in interface OptTrace
public void traceNoStartStopPosition()
OptTrace
traceNoStartStopPosition
in interface OptTrace
public void traceNonCoveringIndexCost(double cost, int tableNumber)
OptTrace
traceNonCoveringIndexCost
in interface OptTrace
public void traceConstantStartStopPositions()
OptTrace
traceConstantStartStopPositions
in interface OptTrace
public void traceEstimatingCostOfConglomerate(ConglomerateDescriptor cd, int tableNumber)
OptTrace
traceEstimatingCostOfConglomerate
in interface OptTrace
public void traceLookingForSpecifiedIndex(java.lang.String indexName, int tableNumber)
OptTrace
traceLookingForSpecifiedIndex
in interface OptTrace
public void traceSingleMatchedRowCost(double cost, int tableNumber)
OptTrace
traceSingleMatchedRowCost
in interface OptTrace
public void traceCostIncludingExtra1stColumnSelectivity(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingExtra1stColumnSelectivity
in interface OptTrace
public void traceNextAccessPath(java.lang.String baseTable, int predicateCount)
OptTrace
traceNextAccessPath
in interface OptTrace
public void traceCostIncludingExtraStartStop(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingExtraStartStop
in interface OptTrace
public void traceCostIncludingExtraQualifierSelectivity(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingExtraQualifierSelectivity
in interface OptTrace
public void traceCostIncludingExtraNonQualifierSelectivity(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingExtraNonQualifierSelectivity
in interface OptTrace
public void traceCostOfNoncoveringIndex(CostEstimate cost, int tableNumber)
OptTrace
traceCostOfNoncoveringIndex
in interface OptTrace
public void traceRememberingJoinStrategy(JoinStrategy joinStrategy, int tableNumber)
OptTrace
traceRememberingJoinStrategy
in interface OptTrace
public void traceRememberingBestAccessPathSubstring(AccessPath ap, int tableNumber)
OptTrace
traceRememberingBestAccessPathSubstring
in interface OptTrace
public void traceRememberingBestSortAvoidanceAccessPathSubstring(AccessPath ap, int tableNumber)
OptTrace
traceRememberingBestSortAvoidanceAccessPathSubstring
in interface OptTrace
public void traceRememberingBestUnknownAccessPathSubstring(AccessPath ap, int tableNumber)
OptTrace
traceRememberingBestUnknownAccessPathSubstring
in interface OptTrace
public void traceCostOfConglomerateScan(int tableNumber, ConglomerateDescriptor cd, CostEstimate costEstimate, int numExtraFirstColumnPreds, double extraFirstColumnSelectivity, int numExtraStartStopPreds, double extraStartStopSelectivity, int startStopPredCount, double statStartStopSelectivity, int numExtraQualifiers, double extraQualifierSelectivity, int numExtraNonQualifiers, double extraNonQualifierSelectivity)
OptTrace
traceCostOfConglomerateScan
in interface OptTrace
public void traceCostIncludingCompositeSelectivityFromStats(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingCompositeSelectivityFromStats
in interface OptTrace
public void traceCompositeSelectivityFromStatistics(double statCompositeSelectivity)
OptTrace
traceCompositeSelectivityFromStatistics
in interface OptTrace
public void traceCostIncludingStatsForIndex(CostEstimate cost, int tableNumber)
OptTrace
traceCostIncludingStatsForIndex
in interface OptTrace
public void printToWriter(java.io.PrintWriter out)
OptTrace
printToWriter
in interface OptTrace
private Optimizable getOptimizable(int tableNumber)
private TableName getOptimizableName(Optimizable optimizable)
private boolean isBaseTable(Optimizable optimizable)
private boolean isFromTable(Optimizable optimizable)
private TableName makeTableName(java.lang.String schemaName, java.lang.String unqualifiedName, ContextManager cm)
private void printThrowable(java.lang.Throwable t)
private org.w3c.dom.Element createElement(org.w3c.dom.Element parent, java.lang.String tag, java.lang.String content)
private java.lang.String formatTimestamp(long timestamp)
private org.w3c.dom.Element formatSkip(org.w3c.dom.Element parent, java.lang.String skipTag, java.lang.String reason)
private org.w3c.dom.Element formatPlanCost(org.w3c.dom.Element parent, java.lang.String type, int[] planOrder, int planType, CostEstimate raw)
private boolean isComplete(int[] joinOrder)
private void formatCost(org.w3c.dom.Element costElement, CostEstimate raw)
private void formatSelectivity(org.w3c.dom.Element parent, java.lang.String tag, int count, double selectivity)
private void formatJoinOrder(org.w3c.dom.Element parent, int[] proposedJoinOrder)
private java.lang.String formatPlanSummary(int[] planOrder, int planType)
Produce a string representation of the plan being considered now. The string has the following grammar:
join :== factor OP factor OP :== "*" | "#" factor :== factor | conglomerateName
Apache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.