Top Description Fields Constructors Methods
org.apache.derby.impl.sql.compile

pack-priv Class HashTableNode

extends SingleChildResultSetNode
Class Inheritance
Imports
java.util.Properties, org.apache.derby.catalog.types.ReferencedColumnsDescriptorImpl, org.apache.derby.shared.common.error.StandardException, org.apache.derby.shared.common.reference.ClassName, org.apache.derby.iapi.services.classfile.VMOpcode, org.apache.derby.iapi.services.compiler.MethodBuilder, org.apache.derby.iapi.services.context.ContextManager, org.apache.derby.iapi.services.io.FormatableArrayHolder, .FormatableIntHolder, org.apache.derby.shared.common.sanity.SanityManager, org.apache.derby.iapi.sql.compile.CostEstimate, .Optimizable, .Optimizer, .Visitor, org.apache.derby.iapi.util.JBitSet
A HashTableNode represents a result set where a hash table is built.

Field Summary

Modifier and TypeField and Description
pack-priv PredicateList
joinPredicateList

pack-priv SubqueryList
pSubqueryList

pack-priv SubqueryList
rSubqueryList

pack-priv PredicateList
searchPredicateList

Inherited from org.apache.derby.impl.sql.compile.SingleChildResultSetNode:
childResulthasTrulyTheBestAccessPath

Constructor Summary

AccessConstructor and Description
pack-priv
HashTableNode(ResultSetNode
The child result set
childResult, Properties
Properties list associated with the table
tableProperties, ResultColumnList
The RCL.
resultColumns, PredicateList
Single table clauses
searchPredicateList, PredicateList
Multi table clauses
joinPredicateList, AccessPathImpl
The access path
accessPath, CostEstimate
The cost estimate
costEstimate, SubqueryList
List of subqueries in RCL
pSubqueryList, SubqueryList
List of subqueries in Predicate lists
rSubqueryList, int[]
Hash key columns
hashKeyColumns, ContextManager
The context manager
cm)

Constructor for a HashTableNode.

Method Summary

Modifier and TypeMethod and Description
pack-priv void
acceptChildren(Visitor
the visitor
v)

Overrides org.apache.derby.impl.sql.compile.SingleChildResultSetNode.acceptChildren.

Accept the visitor for all visitable children of this node.

pack-priv void
generate(ActivationClassBuilder
The ActivationClassBuilder for the class being built
acb, MethodBuilder
The method for the generated code to go into
mb)

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

For joins, the tree will be (nodes are left out if the clauses are empty): ProjectRestrictResultSet -- for the having and the select list SortResultSet -- for the group by list ProjectRestrictResultSet -- for the where and the select list (if no group or having) the result set for the fromList

private void
generateMinion(ExpressionClassBuilder
The ExpressionClassBuilder for the class being built
acb, MethodBuilder
the method the expression will go into
mb, boolean genChildResultSet)

Logic shared by generate() and generateResultSet().

pack-priv void
generateResultSet(ExpressionClassBuilder
The ExpressionClassBuilder for the class being built
acb, MethodBuilder
the method the expression will go into
mb)

Overrides org.apache.derby.impl.sql.compile.ResultSetNode.generateResultSet.

General logic shared by Core compilation and by the Replication Filter compiler.

public Optimizable
modifyAccessPath(JBitSet outerTables, Optimizer optimizer)

pack-priv void
printSubNodes(int
The depth of this node in the tree
depth)

Overrides org.apache.derby.impl.sql.compile.SingleChildResultSetNode.printSubNodes.

Prints the sub-nodes of this object.

Inherited from org.apache.derby.impl.sql.compile.SingleChildResultSetNode:
addNewPredicateadjustForSortEliminationadjustForSortEliminationchangeAccessPathdecrementLevelensurePredicateListflattenableInFromSubqueryforUpdategetChildResultgetFinalCostEstimategetFromTableByNamegetTrulyTheBestAccessPathinitAccessPathsisNotExistsisOneRowResultSetisOrderedOnmodifyAccessPathsoptimizepreprocesspullOptPredicatespushExpressionsreferencesSessionSchemareferencesTargetreflectionNeededForProjectionsetChildResultsetLevelsubqueryReferencesTargetupdateBestPlanMapupdateTargetLockMode

Field Detail

joinPredicateListback to summary
pack-priv PredicateList joinPredicateList
pSubqueryListback to summary
pack-priv SubqueryList pSubqueryList
rSubqueryListback to summary
pack-priv SubqueryList rSubqueryList
searchPredicateListback to summary
pack-priv PredicateList searchPredicateList

Constructor Detail

HashTableNodeback to summary
pack-priv HashTableNode(ResultSetNode childResult, Properties tableProperties, ResultColumnList resultColumns, PredicateList searchPredicateList, PredicateList joinPredicateList, AccessPathImpl accessPath, CostEstimate costEstimate, SubqueryList pSubqueryList, SubqueryList rSubqueryList, int[] hashKeyColumns, ContextManager cm)

Constructor for a HashTableNode.

Parameters
childResult:ResultSetNode

The child result set

tableProperties:Properties

Properties list associated with the table

resultColumns:ResultColumnList

The RCL.

searchPredicateList:PredicateList

Single table clauses

joinPredicateList:PredicateList

Multi table clauses

accessPath:AccessPathImpl

The access path

costEstimate:CostEstimate

The cost estimate

pSubqueryList:SubqueryList

List of subqueries in RCL

rSubqueryList:SubqueryList

List of subqueries in Predicate lists

hashKeyColumns:int[]

Hash key columns

cm:ContextManager

The context manager

Method Detail

acceptChildrenback to summary
pack-priv void acceptChildren(Visitor v) throws StandardException

Overrides org.apache.derby.impl.sql.compile.SingleChildResultSetNode.acceptChildren.

Accept the visitor for all visitable children of this node.

Parameters
v:Visitor

the visitor

Annotations
@Override
Exceptions
StandardException:
on error
generateback to summary
pack-priv void generate(ActivationClassBuilder acb, MethodBuilder mb) throws StandardException

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

For joins, the tree will be (nodes are left out if the clauses are empty): ProjectRestrictResultSet -- for the having and the select list SortResultSet -- for the group by list ProjectRestrictResultSet -- for the where and the select list (if no group or having) the result set for the fromList

Parameters
acb:ActivationClassBuilder

Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.generate.

The ActivationClassBuilder for the class being built

mb:MethodBuilder

Doc from org.apache.derby.impl.sql.compile.QueryTreeNode.generate.

The method for the generated code to go into

Annotations
@Override
Exceptions
StandardException:
Thrown on error
generateMinionback to summary
private void generateMinion(ExpressionClassBuilder acb, MethodBuilder mb, boolean genChildResultSet) throws StandardException

Logic shared by generate() and generateResultSet().

Parameters
acb:ExpressionClassBuilder

The ExpressionClassBuilder for the class being built

mb:MethodBuilder

the method the expression will go into

Exceptions
StandardException:
Thrown on error
generateResultSetback to summary
pack-priv void generateResultSet(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException

Overrides org.apache.derby.impl.sql.compile.ResultSetNode.generateResultSet.

General logic shared by Core compilation and by the Replication Filter compiler. A couple ResultSets (the ones used by PREPARE SELECT FILTER) implement this method.

Parameters
acb:ExpressionClassBuilder

The ExpressionClassBuilder for the class being built

mb:MethodBuilder

the method the expression will go into

Annotations
@Override
Exceptions
StandardException:
Thrown on error
modifyAccessPathback to summary
public Optimizable modifyAccessPath(JBitSet outerTables, Optimizer optimizer) throws StandardException
Exceptions
StandardException:
Thrown on error
See Also
Optimizable#modifyAccessPath
printSubNodesback to summary
pack-priv void printSubNodes(int depth)

Overrides org.apache.derby.impl.sql.compile.SingleChildResultSetNode.printSubNodes.

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Parameters
depth:int

The depth of this node in the tree

Annotations
@Override