NumericConstantNode (Apache Derby V10.14 Internals)

java.lang.Object
- org.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.NumericConstantNode

All Implemented Interfaces:: Visitable

public final class NumericConstantNode
extends ConstantNode

Field Summary

Fields
Modifier and Type	Field	Description
`(package private) static int`	`K_BIGINT`
`(package private) static int`	`K_DECIMAL`
`(package private) static int`	`K_DOUBLE`
`(package private) static int`	`K_INT`
`(package private) static int`	`K_REAL`
`(package private) static int`	`K_SMALLINT`
`(package private) static int`	`K_TINYINT`
`(package private) int`	`kind`	This class is used to hold logically different objects for space efficiency.

Fields inherited from class org.apache.derby.impl.sql.compile.ConstantNode
value

Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode
transformed

Constructor Summary

Constructors
Constructor	Description
`NumericConstantNode(TypeId t, java.lang.Number value, ContextManager cm)`
`NumericConstantNode(TypeId t, ContextManager cm)`	Constructor for a typed null node

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`(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.
`private int`	`getKind(TypeId t)`
`private int`	`getMaxWidth(TypeId t, java.lang.Object val)`
`private int`	`getPrecision(TypeId t, java.lang.Number val)`
`private int`	`getScale(TypeId t, java.lang.Object val)`
`(package private) boolean`	`isSameNodeKind(ValueNode o)`	Some node classes represent several logical node types (to reduce footprint), which we call kinds.
`private void`	`setValue(TypeId t, java.lang.Number value)`

Methods inherited from class org.apache.derby.impl.sql.compile.ConstantNode
bindExpression, constantExpression, generateExpression, getClone, getOrderableVariantType, getValue, isCloneable, isConstantExpression, isEquivalent, isNull, setValue, toString

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode
accept, acceptChildren, addTag, addUDTUsagePriv, addUDTUsagePriv, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, convertDefaultNode, copyTagsFrom, createTypeDependency, debugFlush, debugPrint, disablePrivilegeCollection, formatNodeString, generateAuthorizeCheck, getBeginOffset, getClassFactory, getCompilerContext, getContext, getContextManager, getDataDictionary, getDependencyManager, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getIntProperty, getLanguageConnectionContext, getLongProperty, getNullNode, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getSchemaDescriptor, getSchemaDescriptor, getStatementType, getTableDescriptor, getTypeCompiler, getUDTDesc, isAtomic, isPrivilegeCollectionRequired, isSessionSchema, isSessionSchema, makeConstantAction, makeTableName, makeTableName, nodeHeader, optimizerTracingIsOn, orReliability, parseSearchCondition, parseStatement, printLabel, printSubNodes, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist

Methods inherited from class org.apache.derby.impl.sql.compile.ValueNode
bindExpression, categorize, changeToCNF, checkIsBoolean, checkTopPredicatesForEqualsConditions, copyFields, eliminateNots, evaluateConstantExpressions, genEqualsFalseTree, generate, genIsNullTree, genSQLJavaSQLTree, getColumnName, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isInListProbeNode, isParameterNode, isRelationalOperator, optimizableEqualityNode, preprocess, putAndsOnTop, remapColumnReferencesToExpressions, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop

- Field Detail
  - K_TINYINT
```
static final int K_TINYINT
```
    See Also:
    
    Constant Field Values
  - K_SMALLINT
```
static final int K_SMALLINT
```
    See Also:
    
    Constant Field Values
  - K_INT
```
static final int K_INT
```
    See Also:
    
    Constant Field Values
  - K_BIGINT
```
static final int K_BIGINT
```
    See Also:
    
    Constant Field Values
  - K_DECIMAL
```
static final int K_DECIMAL
```
    See Also:
    
    Constant Field Values
  - K_DOUBLE
```
static final int K_DOUBLE
```
    See Also:
    
    Constant Field Values
  - K_REAL
```
static final int K_REAL
```
    See Also:
    
    Constant Field Values
  - kind
```
final int kind
```
    This class is used to hold logically different objects for space efficiency. kind represents the logical object type. See also ValueNode.isSameNodeKind(org.apache.derby.impl.sql.compile.ValueNode).
- Constructor Detail
  - NumericConstantNode
```
NumericConstantNode(TypeId t,
                    ContextManager cm)
             throws StandardException
```
    Constructor for a typed null node
    
    Parameters:
    
    t - type
    
    cm - context manager
    
    Throws:
    
    StandardException
  - NumericConstantNode
```
NumericConstantNode(TypeId t,
                    java.lang.Number value,
                    ContextManager cm)
             throws StandardException
```
    Parameters:
    
    value - An object containing the value of the constant.
    
    cm - context manager
    
    Throws:
    
    StandardException
- Method Detail
  - getPrecision
```
private int getPrecision(TypeId t,
                         java.lang.Number val)
                  throws StandardException
```
    Throws:
    
    StandardException
  - getScale
```
private int getScale(TypeId t,
                     java.lang.Object val)
              throws StandardException
```
    Throws:
    
    StandardException
  - getMaxWidth
```
private int getMaxWidth(TypeId t,
                        java.lang.Object val)
                 throws StandardException
```
    Throws:
    
    StandardException
  - getKind
```
private int getKind(TypeId t)
```
  - setValue
```
private void setValue(TypeId t,
                      java.lang.Number value)
               throws StandardException
```
    Throws:
    
    StandardException
  - getConstantValueAsObject
```
java.lang.Object getConstantValueAsObject()
                                   throws StandardException
```
    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?
    
    Overrides:
    
    getConstantValueAsObject in class ValueNode
    
    Returns:
    
    An Object representing the bind time value of this expression tree. (null if not a bind time constant.)
    
    Throws:
    
    StandardException - Thrown on error
  - generateConstant
```
void generateConstant(ExpressionClassBuilder acb,
                      MethodBuilder mb)
               throws StandardException
```
    This generates the proper constant. It is implemented by every specific constant node (e.g. IntConstantNode).
    
    Specified by:
    
    generateConstant in class ConstantNode
    
    Parameters:
    
    acb - The ExpressionClassBuilder for the class being built
    
    mb - The method the expression will go into
    
    Throws:
    
    StandardException - Thrown on error
  - isSameNodeKind
```
boolean isSameNodeKind(ValueNode o)
```
    Description copied from class: ValueNode
    
    Some node classes represent several logical node types (to reduce footprint), which we call kinds. This means that implementations of ValueNode.isEquivalent(org.apache.derby.impl.sql.compile.ValueNode) cannot always just use instanceof to check if the other node represents the same kind. Hence this method needs to be overridden by all node classes that represent several kinds. This default implementation does not look at kinds. It is only called from implementations of isEquivalent.
    
    Overrides:
    
    isSameNodeKind in class ValueNode
    
    Parameters:
    
    o - The other value node whose kind we want to compare with.
    
    Returns:
    
    true if this and o represent the same logical node type, i.e. kind.

Class NumericConstantNode

Field Summary

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

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

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

Constructor Summary

Method Summary

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

Methods inherited from class java.lang.Object

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

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

Field Detail

K_TINYINT

K_SMALLINT

K_INT

K_BIGINT

K_DECIMAL

K_DOUBLE

K_REAL

kind

Constructor Detail

NumericConstantNode

NumericConstantNode

Method Detail

getPrecision

getScale

getMaxWidth

getKind

setValue

getConstantValueAsObject

generateConstant

isSameNodeKind