Class VarbitConstantNode

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.BitConstantNode

org.apache.derby.impl.sql.compile.VarbitConstantNode

All Implemented Interfaces:

Visitable

public final class VarbitConstantNode
extends BitConstantNode

Field Summary

Fields

Modifier and Type	Field	Description
(package private) static final int	K_BLOB
(package private) static final int	K_LONGVAR
(package private) static final int	K_VAR
(package private) final int	kind	This class is used to hold logically different objects for space efficiency.

Fields inherited from class ConstantNode

value

Fields inherited from class ValueNode

transformed

Fields inherited from class QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor	Description
VarbitConstantNode(String hexValue, int bitLength, ContextManager cm)
VarbitConstantNode(TypeId t, ContextManager cm)	Construct constant node for one of VARBINARY, LONG VARBINARY and BLOB types.

Method Summary

Modifier and Type	Method	Description
(package private) boolean	isSameNodeKind(ValueNode o)	Some node classes represent several logical node types (to reduce footprint), which we call kinds.

Methods inherited from class BitConstantNode

generateConstant, getConstantValueAsObject

Methods inherited from class ConstantNode

bindExpression, constantExpression, generateExpression, getClone, getOrderableVariantType, getValue, isCloneable, isConstantExpression, isEquivalent, isNull, setValue, toString

Methods inherited from class 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

Methods inherited from class 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 Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Field Details

K_VAR

static final int K_VAR

See Also:

• Constant Field Values

K_LONGVAR

static final int K_LONGVAR

See Also:

• Constant Field Values

K_BLOB

static final int K_BLOB

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(ValueNode).

Constructor Details

VarbitConstantNode

VarbitConstantNode(TypeId t,
 ContextManager cm)
            throws StandardException

Construct constant node for one of VARBINARY, LONG VARBINARY and BLOB types.

Parameters:

t - the type for which we want a constant node

cm - context manager

Throws:

StandardException

VarbitConstantNode

VarbitConstantNode(String hexValue,
 int bitLength,
 ContextManager cm)
            throws StandardException

Throws:

StandardException

Method Details

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(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.