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

Modifier and Type	Field and Description
pack-priv boolean	booleanValue
pack-priv boolean	unknownValue

Access	Constructor and Description
pack-priv	BooleanConstantNode(ContextManager context manager cm)
pack-priv	BooleanConstantNode(boolean value, ContextManager cm)
pack-priv	BooleanConstantNode(TypeId t, ContextManager cm)

Method Summary

Modifier and Type	Method and Description
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.
pack-priv void	generateConstant(ExpressionClassBuilder The ExpressionClassBuilder for the class being built acb, MethodBuilder The method the code to place the code mb) Implements abstract org.apache.derby.impl.sql.compile.ConstantNode.generateConstant. This generates the proper constant.
pack-priv Object	Returns: An Object representing the bind time value of this expression tree. (null if not a bind time constant.) getConstantValueAsObject() Overrides org.apache.derby.impl.sql.compile.ValueNode.getConstantValueAsObject. Return an Object representing the bind time value of this expression tree.
pack-priv String	Returns: The value as a string. getValueAsString() Return the value as a string.
pack-priv boolean	Returns: Whether or not this node represents a false constant. isBooleanFalse() Overrides org.apache.derby.impl.sql.compile.ValueNode.isBooleanFalse. Does this represent a false constant.
pack-priv boolean	Returns: Whether or not this node represents a true constant. isBooleanTrue() Overrides org.apache.derby.impl.sql.compile.ValueNode.isBooleanTrue. Does this represent a true constant.
public double	selectivity(Optimizable optTable) Overrides org.apache.derby.impl.sql.compile.ValueNode.selectivity. The default selectivity for value nodes is 50%.
pack-priv void	setValue(DataValueDescriptor value) Overrides org.apache.derby.impl.sql.compile.ConstantNode.setValue. Set the value in this ConstantNode.

Inherited from org.apache.derby.impl.sql.compile.ConstantNode:: bindExpression constantExpression generateExpression getClone getOrderableVariantType getValue isCloneable isConstantExpression isEquivalent isNull toString

booleanValue	back to summary
pack-priv boolean booleanValue

unknownValue	back to summary
pack-priv boolean unknownValue

BooleanConstantNode	back to summary
pack-priv BooleanConstantNode(ContextManager cm) throws StandardException Parameters cm:ContextManager context manager

BooleanConstantNode	back to summary
pack-priv BooleanConstantNode(boolean value, ContextManager cm) throws StandardException

BooleanConstantNode	back to summary
pack-priv BooleanConstantNode(TypeId t, ContextManager cm) throws StandardException

Method Detail

eliminateNots	back to summary
pack-priv ValueNode eliminateNots(boolean underNotNode) 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

eliminateNots

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pack-priv ValueNode eliminateNots(boolean underNotNode)

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

generateConstant	back to summary
pack-priv void generateConstant(ExpressionClassBuilder acb, MethodBuilder mb) Implements abstract org.apache.derby.impl.sql.compile.ConstantNode.generateConstant. This generates the proper constant. It is implemented by every specific constant node (e.g. IntConstantNode). Parameters acb:ExpressionClassBuilder The ExpressionClassBuilder for the class being built mb:MethodBuilder The method the code to place the code

generateConstant

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pack-priv void generateConstant(ExpressionClassBuilder acb, MethodBuilder mb)

Implements abstract org.apache.derby.impl.sql.compile.ConstantNode.generateConstant.

This generates the proper constant. It is implemented by every specific constant node (e.g. IntConstantNode).

Parameters

acb:ExpressionClassBuilder: The ExpressionClassBuilder for the class being built
mb:MethodBuilder: The method the code to place the code

getConstantValueAsObject	back to summary
pack-priv Object getConstantValueAsObject() Overrides org.apache.derby.impl.sql.compile.ValueNode.getConstantValueAsObject. Return an Object representing the bind time value of this expression tree. If the expression tree does not evaluate to a constant at bind time then we return null. This is useful for bind time resolution of VTIs. Resolve What do we do for primitives? Returns:Object An Object representing the bind time value of this expression tree. (null if not a bind time constant.) Annotations @Override

getConstantValueAsObject

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pack-priv Object getConstantValueAsObject()

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

Return an Object representing the bind time value of this expression tree. If the expression tree does not evaluate to a constant at bind time then we return null. This is useful for bind time resolution of VTIs.

Resolve

What do we do for primitives?

Returns:Object

An Object representing the bind time value of this expression tree. (null if not a bind time constant.)

Annotations

@Override

getValueAsString	back to summary
pack-priv String getValueAsString() Return the value as a string. Returns:String The value as a string.

getValueAsString

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pack-priv String getValueAsString()

Return the value as a string.

Returns:String: The value as a string.

isBooleanFalse	back to summary
pack-priv boolean isBooleanFalse() Overrides org.apache.derby.impl.sql.compile.ValueNode.isBooleanFalse. Does this represent a false constant. Returns:boolean Whether or not this node represents a false constant. Annotations @Override

isBooleanFalse

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pack-priv boolean isBooleanFalse()

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

Does this represent a false constant.

Returns:boolean

Whether or not this node represents a false constant.

Annotations

@Override

isBooleanTrue	back to summary
pack-priv boolean isBooleanTrue() Overrides org.apache.derby.impl.sql.compile.ValueNode.isBooleanTrue. Does this represent a true constant. Returns:boolean Whether or not this node represents a true constant. Annotations @Override

isBooleanTrue

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pack-priv boolean isBooleanTrue()

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

Does this represent a true constant.

Returns:boolean

Whether or not this node represents a true constant.

Annotations

@Override

selectivity	back to summary
public double selectivity(Optimizable optTable) Overrides org.apache.derby.impl.sql.compile.ValueNode.selectivity. The default selectivity for value nodes is 50%. This is overridden in specific cases, such as the RelationalOperators. Annotations @Override

selectivity

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public double selectivity(Optimizable optTable)

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

The default selectivity for value nodes is 50%. This is overridden in specific cases, such as the RelationalOperators.

Annotations

@Override

setValue	back to summary
pack-priv void setValue(DataValueDescriptor value) Overrides org.apache.derby.impl.sql.compile.ConstantNode.setValue. Set the value in this ConstantNode. Annotations @Override

setValue

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pack-priv void setValue(DataValueDescriptor value)

Overrides org.apache.derby.impl.sql.compile.ConstantNode.setValue.

Set the value in this ConstantNode.

Annotations

@Override

public final Class BooleanConstantNode

Field Summary

Constructor Summary

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Field Detail

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Method Detail