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

java.lang.Object
  org.apache.derby.impl.sql.compile.QueryTreeNode
      org.apache.derby.impl.sql.compile.QueryTreeNodeVector
          org.apache.derby.impl.sql.compile.ValueNodeList

All Implemented Interfaces:

org.apache.derby.iapi.sql.compile.Visitable

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public class ValueNodeList

extends QueryTreeNodeVector

A ValueNodeList represents a list of ValueNodes within a specific predicate (eg, IN list, NOT IN list or BETWEEN) in a DML statement. It extends QueryTreeNodeVector.

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Field Summary

 

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, beginOffset, endOffset

 

Constructor Summary

ValueNodeList()

 

Method Summary
org.apache.derby.iapi.sql.compile.Visitable	accept(org.apache.derby.iapi.sql.compile.Visitor v)           Accept a visitor, and call v.visit() on child nodes as necessary.
void	addElement(QueryTreeNode qt)
void	addValueNode(ValueNode valueNode)           Add a ValueNode to the list.
(package private)  boolean	allSamePrecendence(int precedence)           Return whether or not all of the entries in the list have the same type precendence as the specified value.
void	bindExpression(FromList fromList, SubqueryList subqueryList, java.util.Vector aggregateVector)           Bind this expression.
boolean	categorize(org.apache.derby.iapi.util.JBitSet referencedTabs, boolean simplePredsOnly)           Categorize this predicate.
void	comparable(ValueNode leftOperand)           Determine whether or not the leftOperand is comparable() with all of the elements in the list.
void	compatible(ValueNode leftOperand)           Make sure that passed ValueNode's type is compatible with the non-parameter elements in the ValueNodeList.
boolean	constantExpression(PredicateList whereClause)
boolean	containsAllConstantNodes()           Does this list contain all ConstantNodes?
boolean	containsAllParameterNodes()           Does this list contain all ParameterNodes?
boolean	containsParameterNode()           Does this list contain a ParameterNode?
void	destructiveAppend(QueryTreeNodeVector qtnv)
QueryTreeNode	elementAt(int index)
void	genSQLJavaSQLTrees()           Generate a SQL->Java->SQL conversion tree any node in the list which is not a system built-in type.
org.apache.derby.iapi.types.DataTypeDescriptor	getDominantTypeServices()           Get the dominant DataTypeServices from the elements in the list.
protected  int	getOrderableVariantType()           Return the variant type for the underlying expression.
org.apache.derby.iapi.types.DataTypeDescriptor	getTypeServices()           Get the first non-null DataTypeServices from the elements in the list.
(package private)  int	indexOf(QueryTreeNode qt)
(package private)  void	insertElementAt(QueryTreeNode qt, int index)
boolean	isConstantExpression()           Return whether or not this expression tree represents a constant expression.
boolean	isNullable()           Determine whether or not any of the elements in the list are nullable.
void	nondestructiveAppend(QueryTreeNodeVector qtnv)
void	preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList)           Preprocess a ValueNodeList.
void	printSubNodes(int depth)           Prints the sub-nodes of this object.
ValueNodeList	remapColumnReferencesToExpressions()           Remap all ColumnReferences in this tree to be clones of the underlying expression.
(package private)  java.lang.Object	remove(int index)
(package private)  void	removeAllElements()
(package private)  void	removeElement(QueryTreeNode qt)
(package private)  void	removeElementAt(int index)
void	setClause(int clause)           Set the clause that this node appears in.
(package private)  void	setElementAt(QueryTreeNode qt, int index)
void	setParameterDescriptor(org.apache.derby.iapi.types.DataTypeDescriptor descriptor)           Set the descriptor for every ParameterNode in the list.
int	size()
(package private)  void	sortInAscendingOrder(org.apache.derby.iapi.types.DataValueDescriptor judgeODV)           Sort the entries in the list in ascending order.
java.lang.String	toString()           Format this list as a string We can simply iterate through the list.

 

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

bind, convertDefaultNode, debugFlush, debugPrint, executeSchemaName, executeStatementName, formatNodeString, foundString, generate, generate, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContextManager, getCursorInfo, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getNodeFactory, getNodeType, getNullNode, getParameterTypes, getRowEstimate, getSchemaDescriptor, getSchemaDescriptor, getSPSName, getStatementType, getTableDescriptor, getTypeCompiler, init, init, init, init, init, init, init, init, init, init, init, init, init, init, isAtomic, isInstanceOf, isSessionSchema, isSessionSchema, makeConstantAction, makeResultDescription, makeTableName, needsSavepoint, nodeHeader, optimize, parseQueryText, printLabel, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setContextManager, setEndOffset, setNodeType, setRefActionInfo, treePrint, treePrint, verifyClassExist

 

Methods inherited from class java.lang.Object

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

 

Constructor Detail

ValueNodeList

public ValueNodeList()

Method Detail

printSubNodes

public void printSubNodes(int depth)

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

Overrides:

printSubNodes in class QueryTreeNode

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setClause

public void setClause(int clause)

Set the clause that this node appears in.

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addValueNode

public void addValueNode(ValueNode valueNode)
                  throws org.apache.derby.iapi.error.StandardException

Add a ValueNode to the list.

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bindExpression

public void bindExpression(FromList fromList,
                           SubqueryList subqueryList,
                           java.util.Vector aggregateVector)
                    throws org.apache.derby.iapi.error.StandardException

Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression.

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genSQLJavaSQLTrees

public void genSQLJavaSQLTrees()
                        throws org.apache.derby.iapi.error.StandardException

Generate a SQL->Java->SQL conversion tree any node in the list which is not a system built-in type. This is useful when doing comparisons, built-in functions, etc. on java types which have a direct mapping to system built-in types.

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getDominantTypeServices

public org.apache.derby.iapi.types.DataTypeDescriptor getDominantTypeServices()
                                                                       throws org.apache.derby.iapi.error.StandardException

Get the dominant DataTypeServices from the elements in the list.

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getTypeServices

public org.apache.derby.iapi.types.DataTypeDescriptor getTypeServices()
                                                               throws org.apache.derby.iapi.error.StandardException

Get the first non-null DataTypeServices from the elements in the list.

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allSamePrecendence

boolean allSamePrecendence(int precedence)

Return whether or not all of the entries in the list have the same type precendence as the specified value.

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compatible

public void compatible(ValueNode leftOperand)
                throws org.apache.derby.iapi.error.StandardException

Make sure that passed ValueNode's type is compatible with the non-parameter elements in the ValueNodeList.

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comparable

public void comparable(ValueNode leftOperand)
                throws org.apache.derby.iapi.error.StandardException

Determine whether or not the leftOperand is comparable() with all of the elements in the list. Throw an exception if any of them are not comparable.

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isNullable

public boolean isNullable()

Determine whether or not any of the elements in the list are nullable.

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containsParameterNode

public boolean containsParameterNode()

Does this list contain a ParameterNode?

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containsAllParameterNodes

public boolean containsAllParameterNodes()

Does this list contain all ParameterNodes?

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containsAllConstantNodes

public boolean containsAllConstantNodes()

Does this list contain all ConstantNodes?

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sortInAscendingOrder

void sortInAscendingOrder(org.apache.derby.iapi.types.DataValueDescriptor judgeODV)
                    throws org.apache.derby.iapi.error.StandardException

Sort the entries in the list in ascending order. (All values are assumed to be constants.)

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setParameterDescriptor

public void setParameterDescriptor(org.apache.derby.iapi.types.DataTypeDescriptor descriptor)
                            throws org.apache.derby.iapi.error.StandardException

Set the descriptor for every ParameterNode in the list.

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preprocess

public void preprocess(int numTables,
                       FromList outerFromList,
                       SubqueryList outerSubqueryList,
                       PredicateList outerPredicateList)
                throws org.apache.derby.iapi.error.StandardException

Preprocess a ValueNodeList. For now, we just preprocess each ValueNode in the list.

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remapColumnReferencesToExpressions

public ValueNodeList remapColumnReferencesToExpressions()
                                                 throws org.apache.derby.iapi.error.StandardException

Remap all ColumnReferences in this tree to be clones of the underlying expression.

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isConstantExpression

public boolean isConstantExpression()

Return whether or not this expression tree represents a constant expression.

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constantExpression

public boolean constantExpression(PredicateList whereClause)

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categorize

public boolean categorize(org.apache.derby.iapi.util.JBitSet referencedTabs,
                          boolean simplePredsOnly)
                   throws org.apache.derby.iapi.error.StandardException

Categorize this predicate. Initially, this means building a bit map of the referenced tables for each predicate. If the source of this ColumnReference (at the next underlying level) is not a ColumnReference or a VirtualColumnNode then this predicate will not be pushed down. For example, in: select * from (select 1 from s) a (x) where x = 1 we will not push down x = 1. NOTE: It would be easy to handle the case of a constant, but if the inner SELECT returns an arbitrary expression, then we would have to copy that tree into the pushed predicate, and that tree could contain subqueries and method calls. RESOLVE - revisit this issue once we have views.

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getOrderableVariantType

protected int getOrderableVariantType()
                               throws org.apache.derby.iapi.error.StandardException

Return the variant type for the underlying expression. The variant type can be: VARIANT - variant within a scan (method calls and non-static field access) SCAN_INVARIANT - invariant within a scan (column references from outer tables) QUERY_INVARIANT - invariant within the life of a query CONSTANT - constant

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size

public final int size()

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elementAt

public QueryTreeNode elementAt(int index)

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addElement

public final void addElement(QueryTreeNode qt)

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removeElementAt

final void removeElementAt(int index)

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removeElement

final void removeElement(QueryTreeNode qt)

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remove

final java.lang.Object remove(int index)

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indexOf

final int indexOf(QueryTreeNode qt)

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setElementAt

final void setElementAt(QueryTreeNode qt,
                        int index)

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destructiveAppend

public void destructiveAppend(QueryTreeNodeVector qtnv)

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nondestructiveAppend

public void nondestructiveAppend(QueryTreeNodeVector qtnv)

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removeAllElements

final void removeAllElements()

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insertElementAt

final void insertElementAt(QueryTreeNode qt,
                           int index)

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toString

public java.lang.String toString()

Format this list as a string We can simply iterate through the list. Note each list member is a QueryTreeNode, and so should have its specialization of toString defined.

Overrides:

toString in class QueryTreeNode

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accept

public org.apache.derby.iapi.sql.compile.Visitable accept(org.apache.derby.iapi.sql.compile.Visitor v)
                                                   throws org.apache.derby.iapi.error.StandardException

Accept a visitor, and call v.visit() on child nodes as necessary.

Specified by:

accept in interface org.apache.derby.iapi.sql.compile.Visitable

Overrides:

accept in class QueryTreeNode

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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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