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

Access	Constructor and Description
pack-priv	UnaryComparisonOperatorNode(ValueNode operator, ContextManager cm)

Method Summary

Modifier and Type	Method and Description
pack-priv void	bindComparisonOperator() Set the type info for this node.
pack-priv ValueNode	Returns: The new top of the expression tree. bindExpression(FromList The query's FROM list 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.UnaryOperatorNode.bindExpression. Bind this comparison operator.
pack-priv ValueNode	Returns: The modified expression eliminateNots(boolean Whether or not we are under a NotNode. underNotNode) Overrides org.apache.derby.impl.sql.compile.ValueNode.eliminateNots. Eliminate NotNodes in the current query block.
public void	generateAbsoluteColumnId(MethodBuilder mb, Optimizable optTable)
public void	generateExpressionOperand(Optimizable optTable, int columnPosition, ExpressionClassBuilderInterface acbi, MethodBuilder mb)
public void	generateOrderedNulls(MethodBuilder mb)
public void	generateQualMethod(ExpressionClassBuilderInterface acbi, MethodBuilder mb, Optimizable optTable)
public void	generateRelativeColumnId(MethodBuilder mb, Optimizable optTable)
private int	Returns: The absolute 0-based column position of the ColumnReference getAbsoluteColumnPosition(Optimizable The Optimizable optTable) Get the absolute 0-based column position of the ColumnReference from the conglomerate for this Optimizable.
public ColumnReference	getColumnOperand(Optimizable optTable, int columnPosition)
public ColumnReference	getColumnOperand(Optimizable optTable)
public ValueNode	getExpressionOperand(int tableNumber, int columnNumber, Optimizable ft)
pack-priv abstract UnaryOperatorNode	Returns: BinaryOperatorNode The negated expression getNegation(ValueNode The operand of the comparison operator operand) Negate the comparison.
public ValueNode	getOperand(ColumnReference cRef, int refSetSize, boolean otherSide)
public int	getOrderableVariantType(Optimizable optTable)
public int	getStartOperator(Optimizable optTable)
public int	getStopOperator(Optimizable optTable)
public boolean	isQualifier(Optimizable optTable, boolean forPush)
public boolean	orderedNulls()
public boolean	selfComparison(ColumnReference cr)

UnaryComparisonOperatorNode	back to summary
pack-priv UnaryComparisonOperatorNode(ValueNode operator, ContextManager cm) throws StandardException

Method Detail

bindComparisonOperator	back to summary
pack-priv void bindComparisonOperator() throws StandardException 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

back to summary

pack-priv void bindComparisonOperator() throws StandardException

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.UnaryOperatorNode.bindExpression. Bind this comparison operator. All that has to be done for binding a comparison operator is to bind the operand and set the result type to SQLBoolean. Parameters fromList:FromList The query's FROM list 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

back to summary

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

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

Bind this comparison operator. All that has to be done for binding a comparison operator is to bind the operand and set the result type to SQLBoolean.

Parameters

fromList:FromList: The query's FROM list
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

eliminateNots	back to summary
pack-priv ValueNode eliminateNots(boolean underNotNode) throws StandardException Overrides org.apache.derby.impl.sql.compile.ValueNode.eliminateNots. Eliminate NotNodes in the current query block. We traverse the tree, inverting ANDs and ORs and eliminating NOTs as we go. We stop at ComparisonOperators and boolean expressions. We invert ComparisonOperators and replace boolean expressions with boolean expression = false. Note Since we do not recurse under ComparisonOperators, there still could be NotNodes left in the tree. Parameters underNotNode:boolean Whether or not we are under a NotNode. Returns:ValueNode The modified expression Annotations @Override Exceptions StandardException: Thrown on error

eliminateNots

back to summary

pack-priv ValueNode eliminateNots(boolean underNotNode) throws StandardException

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

Eliminate NotNodes in the current query block. We traverse the tree, inverting ANDs and ORs and eliminating NOTs as we go. We stop at ComparisonOperators and boolean expressions. We invert ComparisonOperators and replace boolean expressions with boolean expression = false.

Note

Since we do not recurse under ComparisonOperators, there still could be NotNodes left in the tree.

Parameters

underNotNode:boolean: Whether or not we are under a NotNode.

Returns:ValueNode

The modified expression

Annotations

@Override

Exceptions

StandardException:: Thrown on error

generateAbsoluteColumnId	back to summary
public void generateAbsoluteColumnId(MethodBuilder mb, Optimizable optTable) See Also `RelationalOperator#generateAbsoluteColumnId`

generateExpressionOperand	back to summary
public void generateExpressionOperand(Optimizable optTable, int columnPosition, ExpressionClassBuilderInterface acbi, MethodBuilder mb) throws StandardException Exceptions StandardException: Thrown on error See Also `RelationalOperator#generateExpressionOperand`

generateOrderedNulls	back to summary
public void generateOrderedNulls(MethodBuilder mb) See Also `RelationalOperator#generateOrderedNulls`

generateQualMethod	back to summary
public void generateQualMethod(ExpressionClassBuilderInterface acbi, MethodBuilder mb, Optimizable optTable) throws StandardException Exceptions StandardException: Thrown on error See Also `RelationalOperator#generateQualMethod`

generateRelativeColumnId	back to summary
public void generateRelativeColumnId(MethodBuilder mb, Optimizable optTable) See Also `RelationalOperator#generateRelativeColumnId`

getAbsoluteColumnPosition	back to summary
private int getAbsoluteColumnPosition(Optimizable optTable) Get the absolute 0-based column position of the ColumnReference from the conglomerate for this Optimizable. Parameters optTable:Optimizable The Optimizable Returns:int The absolute 0-based column position of the ColumnReference

getAbsoluteColumnPosition

back to summary

private int getAbsoluteColumnPosition(Optimizable optTable)

Get the absolute 0-based column position of the ColumnReference from the conglomerate for this Optimizable.

Parameters

optTable:Optimizable: The Optimizable

Returns:int

The absolute 0-based column position of the ColumnReference

getColumnOperand	back to summary
public ColumnReference getColumnOperand(Optimizable optTable, int columnPosition) See Also `RelationalOperator#getColumnOperand`

getColumnOperand	back to summary
public ColumnReference getColumnOperand(Optimizable optTable) See Also `RelationalOperator#getColumnOperand`

getExpressionOperand	back to summary
public ValueNode getExpressionOperand(int tableNumber, int columnNumber, Optimizable ft) See Also `RelationalOperator#getExpressionOperand`

getNegation	back to summary
pack-priv abstract UnaryOperatorNode getNegation(ValueNode operand) throws StandardException Negate the comparison. Parameters operand:ValueNode The operand of the comparison operator Returns:UnaryOperatorNode BinaryOperatorNode The negated expression Exceptions StandardException: Thrown on error

getNegation

back to summary

pack-priv abstract UnaryOperatorNode getNegation(ValueNode operand) throws StandardException

Negate the comparison.

Parameters

operand:ValueNode: The operand of the comparison operator

Returns:UnaryOperatorNode

BinaryOperatorNode The negated expression

Exceptions

StandardException:: Thrown on error

getOperand	back to summary
public ValueNode getOperand(ColumnReference cRef, int refSetSize, boolean otherSide) See Also `RelationalOperator#getOperand`

getOrderableVariantType	back to summary
public int getOrderableVariantType(Optimizable optTable) throws StandardException Exceptions StandardException: thrown on error See Also `RelationalOperator#getOrderableVariantType`

getStartOperator	back to summary
public int getStartOperator(Optimizable optTable) See Also `RelationalOperator#getStartOperator`

getStopOperator	back to summary
public int getStopOperator(Optimizable optTable) See Also `RelationalOperator#getStopOperator`

isQualifier	back to summary
public boolean isQualifier(Optimizable optTable, boolean forPush) See Also `RelationalOperator#isQualifier`

orderedNulls	back to summary
public boolean orderedNulls() See Also `RelationalOperator#orderedNulls`

selfComparison	back to summary
public boolean selfComparison(ColumnReference cr) See Also `RelationalOperator#selfComparison`

public abstract Class UnaryComparisonOperatorNode

Field Summary

Constructor Summary

Method Summary

Constructor Detail

Method Detail