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java.lang.Objectorg.apache.derby.impl.sql.compile.QueryTreeNode
org.apache.derby.impl.sql.compile.ValueNode
org.apache.derby.impl.sql.compile.ConstantNode
org.apache.derby.impl.sql.compile.BooleanConstantNode
public final class BooleanConstantNode
Field Summary | |
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(package private) boolean |
booleanValue
|
(package private) boolean |
unknownValue
|
Fields inherited from class org.apache.derby.impl.sql.compile.ConstantNode |
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value |
Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode |
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transformed |
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode |
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AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, isPrivilegeCollectionRequired |
Constructor Summary | |
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BooleanConstantNode()
|
Method Summary | |
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(package private) ValueNode |
eliminateNots(boolean underNotNode)
Eliminate NotNodes in the current query block. |
(package private) void |
generateConstant(ExpressionClassBuilder acb,
MethodBuilder mb)
This generates the proper constant. |
(package private) java.lang.Object |
getConstantValueAsObject()
Return an Object representing the bind time value of this expression tree. |
(package private) java.lang.String |
getValueAsString()
Return the value as a string. |
void |
init(java.lang.Object arg1)
Initializer for a BooleanConstantNode. |
(package private) boolean |
isBooleanFalse()
Does this represent a false constant. |
(package private) boolean |
isBooleanTrue()
Does this represent a true constant. |
double |
selectivity(Optimizable optTable)
The default selectivity for value nodes is 50%. |
void |
setValue(DataValueDescriptor value)
Set the value in this ConstantNode. |
Methods inherited from class org.apache.derby.impl.sql.compile.ConstantNode |
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bindExpression, constantExpression, generateExpression, getClone, getOrderableVariantType, getValue, init, isCloneable, isConstantExpression, isEquivalent, isNull, toString |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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boolean booleanValue
boolean unknownValue
Constructor Detail |
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public BooleanConstantNode()
Method Detail |
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public void init(java.lang.Object arg1) throws StandardException
init
in class QueryTreeNode
arg1
- A boolean containing the value of the constant OR The TypeId for the type of the node
StandardException
java.lang.Object getConstantValueAsObject()
getConstantValueAsObject
in class ValueNode
java.lang.String getValueAsString()
boolean isBooleanTrue()
isBooleanTrue
in class ValueNode
boolean isBooleanFalse()
isBooleanFalse
in class ValueNode
public double selectivity(Optimizable optTable)
selectivity
in class ValueNode
ValueNode eliminateNots(boolean underNotNode)
eliminateNots
in class ValueNode
underNotNode
- Whether or not we are under a NotNode.
void generateConstant(ExpressionClassBuilder acb, MethodBuilder mb)
generateConstant
in class ConstantNode
acb
- The ExpressionClassBuilder for the class being builtmb
- The method the code to place the codepublic void setValue(DataValueDescriptor value)
setValue
in class ConstantNode
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Built on Thu 2011-03-10 11:54:14+0000, from revision ??? | ||||||||
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