Apache Derby Database Engine and Embedded JDBC Driver 10.17.1.0 · org.apache.derby.impl.sql.compile.BinaryListOperatorNode

Modifier and Type	Field and Description
pack-priv ValueNode	leftOperand
pack-priv String	methodName
pack-priv String	operator
pack-priv ValueNodeList	rightOperandList

Access	Constructor and Description
pack-priv	BinaryListOperatorNode(ValueNode leftOperand, ValueNodeList rightOperandList, String operator, String methodName, ContextManager cm)

Method Summary

Modifier and Type	Method and Description
pack-priv void	acceptChildren(Visitor the visitor v) Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.acceptChildren. Accept the visitor for all visitable children of this node.
pack-priv void	bindComparisonOperator() Test the type compatability of the operands and set the type info for this node.
pack-priv ValueNode	Returns: The new top of the expression tree. bindExpression(FromList The FROM list for the query this expression is in, for binding columns. fromList, SubqueryList The subquery list being built as we find SubqueryNodes subqueryList, List<AggregateNode> The aggregate list being built as we find AggregateNodes aggregates) Overrides org.apache.derby.impl.sql.compile.ValueNode.bindExpression. Bind this expression.
pack-priv boolean	Returns: boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode. categorize(JBitSet JBitSet with bit map of referenced FromTables referencedTabs, boolean Whether or not to consider method calls, field references and conditional nodes when building bit map simplePredsOnly) Overrides org.apache.derby.impl.sql.compile.ValueNode.categorize. Categorize this predicate.
pack-priv boolean	constantExpression(PredicateList whereClause) Overrides org.apache.derby.impl.sql.compile.ValueNode.constantExpression. Return whether or not this expression tree represents a constant value.
pack-priv ValueNode	Returns: The current leftOperand. getLeftOperand() Get the leftOperand
protected int	Returns: The variant type for the underlying expression. getOrderableVariantType() Overrides org.apache.derby.impl.sql.compile.ValueNode.getOrderableVariantType. Return the variant type for the underlying expression.
pack-priv ValueNodeList	Returns: The current rightOperandList. getRightOperandList() Get the rightOperandList
pack-priv boolean	Returns: Whether or not this expression tree represents a constant expression. isConstantExpression() Overrides org.apache.derby.impl.sql.compile.ValueNode.isConstantExpression. Return whether or not this expression tree represents a constant expression.
pack-priv boolean	isEquivalent(ValueNode the node to compare this ValueNode against. o) Implements abstract org.apache.derby.impl.sql.compile.ValueNode.isEquivalent. Tests if this node is equivalent to the specified ValueNode.
pack-priv ValueNode	Returns: The modified expression preprocess(int Number of tables in the DML Statement numTables, FromList FromList from outer query block outerFromList, SubqueryList SubqueryList from outer query block outerSubqueryList, PredicateList PredicateList from outer query block outerPredicateList) Overrides org.apache.derby.impl.sql.compile.ValueNode.preprocess. Preprocess an expression tree.
pack-priv void	printSubNodes(int The depth of this node in the tree depth) Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.printSubNodes. Prints the sub-nodes of this object.
pack-priv ValueNode	Returns: ValueNode The remapped expression tree. remapColumnReferencesToExpressions() Overrides org.apache.derby.impl.sql.compile.ValueNode.remapColumnReferencesToExpressions. Remap all ColumnReferences in this tree to be clones of the underlying expression.
pack-priv void	setLeftOperand(ValueNode The new leftOperand newLeftOperand) Set the leftOperand to the specified ValueNode
pack-priv void	setRightOperandList(ValueNodeList The new rightOperandList newRightOperandList) Set the rightOperandList to the specified ValueNodeList
public String	Returns: This object as a String toString() Overrides org.apache.derby.impl.sql.compile.ValueNode.toString. Convert this object to a String.

Inherited from org.apache.derby.impl.sql.compile.ValueNode:: bindExpression changeToCNF checkIsBoolean checkTopPredicatesForEqualsConditions copyFields eliminateNots evaluateConstantExpressions genEqualsFalseTree generate generateExpression genIsNullTree genSQLJavaSQLTree getClone getColumnName getConstantValueAsObject getDataValueFactory getSchemaName getSourceResultColumn getTableName getTablesReferenced getTransformed getTypeCompiler getTypeId getTypeServices isBinaryEqualsOperatorNode isBooleanFalse isBooleanTrue isCloneable isInListProbeNode isParameterNode isRelationalOperator isSameNodeKind optimizableEqualityNode putAndsOnTop requiresTypeFromContext selectivity setCollationInfo setCollationInfo setCollationUsingCompilationSchema setCollationUsingCompilationSchema setNullability setTransformed setType setType setType updatableByCursor verifyChangeToCNF verifyEliminateNots verifyPutAndsOnTop

leftOperand	back to summary
pack-priv ValueNode leftOperand

methodName	back to summary
pack-priv String methodName

operator	back to summary
pack-priv String operator

rightOperandList	back to summary
pack-priv ValueNodeList rightOperandList

BinaryListOperatorNode	back to summary
pack-priv BinaryListOperatorNode(ValueNode leftOperand, ValueNodeList rightOperandList, String operator, String methodName, ContextManager cm)

Method Detail

acceptChildren	back to summary
pack-priv void acceptChildren(Visitor v) throws StandardException Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.acceptChildren. Accept the visitor for all visitable children of this node. Parameters v:Visitor the visitor Annotations @Override Exceptions StandardException: on error

acceptChildren

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pack-priv void acceptChildren(Visitor v) throws StandardException

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

Accept the visitor for all visitable children of this node.

Parameters

v:Visitor: the visitor

Annotations

@Override

Exceptions

StandardException:: on error

bindComparisonOperator	back to summary
pack-priv void bindComparisonOperator() throws StandardException Test the type compatability of the operands and set the type info for this node. This method is useful both during binding and when we generate nodes within the language module outside of the parser. Exceptions StandardException: Thrown on error

bindComparisonOperator

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pack-priv void bindComparisonOperator() throws StandardException

Test the type compatability of the operands and set the type info for this node. This method is useful both during binding and when we generate nodes within the language module outside of the parser.

Exceptions

StandardException:: Thrown on error

bindExpression	back to summary
pack-priv ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates) throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.bindExpression. Bind this expression. This means binding the sub-expressions, as well as figuring out what the return type is for this expression. Parameters fromList:FromList The FROM list for the query this expression is in, for binding columns. subqueryList:SubqueryList The subquery list being built as we find SubqueryNodes aggregates:List<AggregateNode> The aggregate list being built as we find AggregateNodes Returns:ValueNode The new top of the expression tree. Annotations @Override Exceptions StandardException: Thrown on error

bindExpression

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pack-priv ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, List<AggregateNode> aggregates) throws StandardException

Overrides org.apache.derby.impl.sql.compile.ValueNode.bindExpression.

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

Parameters

fromList:FromList: The FROM list for the query this expression is in, for binding columns.
subqueryList:SubqueryList: The subquery list being built as we find SubqueryNodes
aggregates:List<AggregateNode>: The aggregate list being built as we find AggregateNodes

Returns:ValueNode

The new top of the expression tree.

Annotations

@Override

Exceptions

StandardException:: Thrown on error

categorize	back to summary
pack-priv boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly) throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.categorize. 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. Parameters referencedTabs:JBitSet JBitSet with bit map of referenced FromTables simplePredsOnly:boolean Whether or not to consider method calls, field references and conditional nodes when building bit map Returns:boolean boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode. Annotations @Override Exceptions StandardException: Thrown on error

categorize

back to summary

pack-priv boolean categorize(JBitSet referencedTabs, boolean simplePredsOnly) throws StandardException

Overrides org.apache.derby.impl.sql.compile.ValueNode.categorize.

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.

Parameters

referencedTabs:JBitSet: JBitSet with bit map of referenced FromTables
simplePredsOnly:boolean: Whether or not to consider method calls, field references and conditional nodes when building bit map

Returns:boolean

boolean Whether or not source.expression is a ColumnReference or a VirtualColumnNode.

Annotations

@Override

Exceptions

StandardException:: Thrown on error

constantExpression back to summary

constantExpression	back to summary
pack-priv boolean constantExpression(PredicateList whereClause) Overrides org.apache.derby.impl.sql.compile.ValueNode.constantExpression. Doc from org.apache.derby.impl.sql.compile.ValueNode.constantExpression. Return whether or not this expression tree represents a constant value. In this case, "constant" means that it will always evaluate to the same thing, even if it includes columns. A column is constant if it is compared to a constant expression. Returns:boolean True means this expression tree represents a constant value. Annotations @Override See Also `ValueNode#constantExpression`

pack-priv boolean constantExpression(PredicateList whereClause)

Overrides org.apache.derby.impl.sql.compile.ValueNode.constantExpression.

Doc from org.apache.derby.impl.sql.compile.ValueNode.constantExpression.

Return whether or not this expression tree represents a constant value. In this case, "constant" means that it will always evaluate to the same thing, even if it includes columns. A column is constant if it is compared to a constant expression.

Returns:boolean

True means this expression tree represents a constant value.

Annotations

@Override

See Also

ValueNode#constantExpression

getLeftOperand	back to summary
pack-priv ValueNode getLeftOperand() Get the leftOperand Returns:ValueNode The current leftOperand.

getLeftOperand

back to summary

pack-priv ValueNode getLeftOperand()

Get the leftOperand

Returns:ValueNode: The current leftOperand.

getOrderableVariantType	back to summary
protected int getOrderableVariantType() throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.getOrderableVariantType. 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 - immutable Returns:int The variant type for the underlying expression. Annotations @Override Exceptions StandardException: thrown on error

getOrderableVariantType

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protected int getOrderableVariantType() throws StandardException

Overrides org.apache.derby.impl.sql.compile.ValueNode.getOrderableVariantType.

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 - immutable

Returns:int

The variant type for the underlying expression.

Annotations

@Override

Exceptions

StandardException:: thrown on error

getRightOperandList	back to summary
pack-priv ValueNodeList getRightOperandList() Get the rightOperandList Returns:ValueNodeList The current rightOperandList.

getRightOperandList

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pack-priv ValueNodeList getRightOperandList()

Get the rightOperandList

Returns:ValueNodeList: The current rightOperandList.

isConstantExpression	back to summary
pack-priv boolean isConstantExpression() Overrides org.apache.derby.impl.sql.compile.ValueNode.isConstantExpression. Return whether or not this expression tree represents a constant expression. Returns:boolean Whether or not this expression tree represents a constant expression. Annotations @Override

isConstantExpression

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pack-priv boolean isConstantExpression()

Overrides org.apache.derby.impl.sql.compile.ValueNode.isConstantExpression.

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

Returns:boolean

Whether or not this expression tree represents a constant expression.

Annotations

@Override

isEquivalent back to summary

isEquivalent	back to summary
pack-priv boolean isEquivalent(ValueNode o) throws StandardException Implements abstract org.apache.derby.impl.sql.compile.ValueNode.isEquivalent. Doc from org.apache.derby.impl.sql.compile.ValueNode.isEquivalent. Tests if this node is equivalent to the specified ValueNode. Two ValueNodes are considered equivalent if they will evaluate to the same value during query execution. This method provides basic expression matching facility for the derived class of ValueNode and it is used by the language layer to compare the node structural form of the two expressions for equivalence at bind phase. Note that it is not comparing the actual row values at runtime to produce a result; hence, when comparing SQL NULLs, they are considered to be equivalent and not unknown. One usage case of this method in this context is to compare the select column expression against the group by expression to check if they are equivalent. e.g.: SELECT c1+c2 FROM t1 GROUP BY c1+c2 In general, node equivalence is determined by the derived class of ValueNode. But they generally abide to the rules below: The two ValueNodes must be of the same node type to be considered equivalent. e.g.: CastNode vs. CastNode - equivalent (if their args also match), ColumnReference vs CastNode - not equivalent. If node P contains other ValueNode(s) and so on, those node(s) must also be of the same node type to be considered equivalent. If node P takes a parameter list, then the number of arguments and its arguments for the two nodes must also match to be considered equivalent. e.g.: CAST(c1 as INTEGER) vs CAST(c1 as SMALLINT), they are not equivalent. When comparing SQL NULLs in this context, they are considered to be equivalent. If this does not apply or it is determined that the two nodes are not equivalent then the derived class of this method should return false; otherwise, return true. Parameters o:ValueNode the node to compare this ValueNode against. Returns:boolean `true` if the two nodes are equivalent, `false` otherwise.

pack-priv boolean isEquivalent(ValueNode o) throws StandardException

Implements abstract org.apache.derby.impl.sql.compile.ValueNode.isEquivalent.

Doc from org.apache.derby.impl.sql.compile.ValueNode.isEquivalent.

Tests if this node is equivalent to the specified ValueNode. Two ValueNodes are considered equivalent if they will evaluate to the same value during query execution.

This method provides basic expression matching facility for the derived class of ValueNode and it is used by the language layer to compare the node structural form of the two expressions for equivalence at bind phase.

Note that it is not comparing the actual row values at runtime to produce a result; hence, when comparing SQL NULLs, they are considered to be equivalent and not unknown.

One usage case of this method in this context is to compare the select column expression against the group by expression to check if they are equivalent. e.g.:

SELECT c1+c2 FROM t1 GROUP BY c1+c2

In general, node equivalence is determined by the derived class of ValueNode. But they generally abide to the rules below:

The two ValueNodes must be of the same node type to be considered equivalent. e.g.: CastNode vs. CastNode - equivalent (if their args also match), ColumnReference vs CastNode - not equivalent.
If node P contains other ValueNode(s) and so on, those node(s) must also be of the same node type to be considered equivalent.
If node P takes a parameter list, then the number of arguments and its arguments for the two nodes must also match to be considered equivalent. e.g.: CAST(c1 as INTEGER) vs CAST(c1 as SMALLINT), they are not equivalent.
When comparing SQL NULLs in this context, they are considered to be equivalent.
If this does not apply or it is determined that the two nodes are not equivalent then the derived class of this method should return false; otherwise, return true.

Parameters

o:ValueNode: the node to compare this ValueNode against.

Returns:boolean

true if the two nodes are equivalent, false otherwise.

preprocess	back to summary
pack-priv ValueNode preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.preprocess. Preprocess an expression tree. We do a number of transformations here (including subqueries, IN lists, LIKE and BETWEEN) plus subquery flattening. Note This is done before the outer ResultSetNode is preprocessed. Parameters numTables:int Number of tables in the DML Statement outerFromList:FromList FromList from outer query block outerSubqueryList:SubqueryList SubqueryList from outer query block outerPredicateList:PredicateList PredicateList from outer query block Returns:ValueNode The modified expression Annotations @Override Exceptions StandardException: Thrown on error

preprocess

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pack-priv ValueNode preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException

Overrides org.apache.derby.impl.sql.compile.ValueNode.preprocess.

Preprocess an expression tree. We do a number of transformations here (including subqueries, IN lists, LIKE and BETWEEN) plus subquery flattening.

Note

This is done before the outer ResultSetNode is preprocessed.

Parameters

numTables:int: Number of tables in the DML Statement
outerFromList:FromList: FromList from outer query block
outerSubqueryList:SubqueryList: SubqueryList from outer query block
outerPredicateList:PredicateList: PredicateList from outer query block

Returns:ValueNode

The modified expression

Annotations

@Override

Exceptions

StandardException:: Thrown on error

printSubNodes	back to summary
pack-priv void printSubNodes(int depth) Overrides org.apache.derby.impl.sql.compile.QueryTreeNode.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

printSubNodes

back to summary

pack-priv void printSubNodes(int depth)

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

remapColumnReferencesToExpressions	back to summary
pack-priv ValueNode remapColumnReferencesToExpressions() throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.remapColumnReferencesToExpressions. Remap all ColumnReferences in this tree to be clones of the underlying expression. Returns:ValueNode ValueNode The remapped expression tree. Annotations @Override Exceptions StandardException: Thrown on error

remapColumnReferencesToExpressions

back to summary

pack-priv ValueNode remapColumnReferencesToExpressions() throws StandardException

Overrides org.apache.derby.impl.sql.compile.ValueNode.remapColumnReferencesToExpressions.

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

Returns:ValueNode

ValueNode The remapped expression tree.

Annotations

@Override

Exceptions

StandardException:: Thrown on error

setLeftOperand	back to summary
pack-priv void setLeftOperand(ValueNode newLeftOperand) Set the leftOperand to the specified ValueNode Parameters newLeftOperand:ValueNode The new leftOperand

setLeftOperand

back to summary

pack-priv void setLeftOperand(ValueNode newLeftOperand)

Set the leftOperand to the specified ValueNode

Parameters

newLeftOperand:ValueNode: The new leftOperand

setRightOperandList	back to summary
pack-priv void setRightOperandList(ValueNodeList newRightOperandList) Set the rightOperandList to the specified ValueNodeList Parameters newRightOperandList:ValueNodeList The new rightOperandList

setRightOperandList

back to summary

pack-priv void setRightOperandList(ValueNodeList newRightOperandList)

Set the rightOperandList to the specified ValueNodeList

Parameters

newRightOperandList:ValueNodeList: The new rightOperandList

toString	back to summary
public String toString() Overrides org.apache.derby.impl.sql.compile.ValueNode.toString. Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing. Returns:String This object as a String Annotations @Override

toString

back to summary

public String toString()

Overrides org.apache.derby.impl.sql.compile.ValueNode.toString.

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Returns:String

This object as a String

Annotations

@Override

public abstract Class BinaryListOperatorNode

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Method Detail