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org.apache.derby.impl.sql.compile
Class BaseJoinStrategy  

java.lang.Object
  org.apache.derby.impl.sql.compile.BaseJoinStrategy

All Implemented Interfaces:

org.apache.derby.iapi.sql.compile.JoinStrategy

Direct Known Subclasses:

HashJoinStrategy, NestedLoopJoinStrategy

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public abstract class BaseJoinStrategy

extends java.lang.Object

implements org.apache.derby.iapi.sql.compile.JoinStrategy

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Constructor Summary

BaseJoinStrategy()

 

Method Summary
boolean	bulkFetchOK()           Is it OK to use bulk fetch with this join strategy?
protected  void	fillInScanArgs1(org.apache.derby.iapi.store.access.TransactionController tc, org.apache.derby.iapi.services.compiler.MethodBuilder mb, org.apache.derby.iapi.sql.compile.Optimizable innerTable, org.apache.derby.iapi.sql.compile.OptimizablePredicateList predList, org.apache.derby.iapi.sql.compile.ExpressionClassBuilderInterface acbi, org.apache.derby.iapi.services.compiler.MethodBuilder resultRowAllocator)
protected  void	fillInScanArgs2(org.apache.derby.iapi.services.compiler.MethodBuilder mb, org.apache.derby.iapi.sql.compile.Optimizable innerTable, int bulkFetch, int colRefItem, int indexColItem, int lockMode, boolean tableLocked, int isolationLevel)
boolean	ignoreBulkFetch()           Should we just ignore bulk fetch with this join strategy?
boolean	isHashJoin()           Is this a form of hash join?
protected  boolean	validForOutermostTable()           Can this join strategy be used on the outermost table of a join.

 

Methods inherited from class java.lang.Object

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

 

Methods inherited from interface org.apache.derby.iapi.sql.compile.JoinStrategy

divideUpPredicateLists, doesMaterialization, estimateCost, feasible, getBasePredicates, getName, getScanArgs, halfOuterJoinResultSetMethodName, joinResultSetMethodName, maxCapacity, multiplyBaseCostByOuterRows, nonBasePredicateSelectivity, putBasePredicates, resultSetMethodName, scanCostType

 

Constructor Detail

BaseJoinStrategy

public BaseJoinStrategy()

Method Detail

bulkFetchOK

public boolean bulkFetchOK()

Description copied from interface: org.apache.derby.iapi.sql.compile.JoinStrategy

Is it OK to use bulk fetch with this join strategy?

Specified by:

bulkFetchOK in interface org.apache.derby.iapi.sql.compile.JoinStrategy

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ignoreBulkFetch

public boolean ignoreBulkFetch()

Description copied from interface: org.apache.derby.iapi.sql.compile.JoinStrategy

Should we just ignore bulk fetch with this join strategy?

Specified by:

ignoreBulkFetch in interface org.apache.derby.iapi.sql.compile.JoinStrategy

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fillInScanArgs1

protected void fillInScanArgs1(org.apache.derby.iapi.store.access.TransactionController tc,
                               org.apache.derby.iapi.services.compiler.MethodBuilder mb,
                               org.apache.derby.iapi.sql.compile.Optimizable innerTable,
                               org.apache.derby.iapi.sql.compile.OptimizablePredicateList predList,
                               org.apache.derby.iapi.sql.compile.ExpressionClassBuilderInterface acbi,
                               org.apache.derby.iapi.services.compiler.MethodBuilder resultRowAllocator)
                        throws org.apache.derby.iapi.error.StandardException

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fillInScanArgs2

protected void fillInScanArgs2(org.apache.derby.iapi.services.compiler.MethodBuilder mb,
                               org.apache.derby.iapi.sql.compile.Optimizable innerTable,
                               int bulkFetch,
                               int colRefItem,
                               int indexColItem,
                               int lockMode,
                               boolean tableLocked,
                               int isolationLevel)
                        throws org.apache.derby.iapi.error.StandardException

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isHashJoin

public boolean isHashJoin()

Description copied from interface: org.apache.derby.iapi.sql.compile.JoinStrategy

Is this a form of hash join?

Specified by:

isHashJoin in interface org.apache.derby.iapi.sql.compile.JoinStrategy

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validForOutermostTable

protected boolean validForOutermostTable()

Can this join strategy be used on the outermost table of a join.

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Overview  Package   Class  Use  Deprecated  Index
Home >> All >> org >> apache >> derby >> impl >> sql >> [ compile overview ]	PREV CLASS  NEXT CLASS
SUMMARY:  JAVADOC |  SOURCE |  DOWNLOAD | NESTED | FIELD | CONSTR | METHOD	DETAIL: FIELD | CONSTR | METHOD

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