org.apache.derby.impl.sql.compile

Class BitConstantNode

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

All Implemented Interfaces:

Visitable

Direct Known Subclasses:

VarbitConstantNode

class BitConstantNode
extends ConstantNode

Field Summary

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

value

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

transformed

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

Constructor Summary

Constructors

Constructor and Description
BitConstantNode(java.lang.String hexString, int bitLength, ContextManager cm)
BitConstantNode(TypeId t, ContextManager cm)

Method Summary

Modifier and Type	Method and 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.

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 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, isSameNodeKind, optimizableEqualityNode, preprocess, putAndsOnTop, remapColumnReferencesToExpressions, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop

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 java.lang.Object

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

Constructor Detail

BitConstantNode

BitConstantNode(TypeId t,
                ContextManager cm)
         throws StandardException

Parameters:

t - The TypeId for the type of the node

cm - context manager

Throws:

StandardException

BitConstantNode

BitConstantNode(java.lang.String hexString,
                int bitLength,
                ContextManager cm)
         throws StandardException

Parameters:

hexString - hexadecimally coded bit string

bitLength - desired length of the bit string

cm - context manager

Throws:

StandardException

Method Detail

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 code to place the code

Throws:

StandardException - Thrown on error