Modifier and Type | Field and Description |
---|---|
private boolean |
assignmentSemantics
Method calls:
Argument type has the same semantics as assignment:
Section 9.2 (Store assignment).
|
(package private) ValueNode |
castOperand |
private boolean |
externallyGeneratedCastNode
This variable gets set by the parser to indicate that this CAST node
has been generated by the parser.
|
private boolean |
forDataTypeFunction |
(package private) TypeId |
sourceCTI |
private int |
targetCharType |
private DataTypeDescriptor |
targetUDT
The original, unbound descriptor for the target type, if it is a UDT.
|
private TableName |
udtTargetName
The name of the target type if it's a UDT.
|
transformed
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_CYCLE, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
CastNode(ValueNode castOperand,
DataTypeDescriptor castTarget,
ContextManager cm)
Constructor for a CastNode
|
CastNode(ValueNode castOperand,
int charType,
int charLength,
ContextManager cm)
Constructor for a CastNode
|
Modifier and Type | Method and Description |
---|---|
(package private) void |
acceptChildren(Visitor v)
Accept the visitor for all visitable children of this node.
|
(package private) void |
bindCastNodeOnly()
Bind this node but not its child.
|
(package private) ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.List<AggregateNode> aggregates)
Bind this expression.
|
(package private) boolean |
categorize(JBitSet referencedTabs,
boolean simplePredsOnly)
Categorize this predicate.
|
(package private) boolean |
constantExpression(PredicateList whereClause)
Return whether or not this expression tree represents a constant value.
|
private void |
genDataValueConversion(ExpressionClassBuilder acb,
MethodBuilder mb) |
(package private) void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
Do code generation for this unary operator.
|
private ValueNode |
getCastFromCharConstant(int destJDBCTypeId)
Get a constant representing the cast from a CHAR to another
type.
|
private ValueNode |
getCastFromIntegralType(long longValue,
int destJDBCTypeId)
Get a constant representing the cast from an integral type to another
type.
|
private ValueNode |
getCastFromNumericType(DataValueDescriptor constantValue,
int destJDBCTypeId)
Get a constant representing the cast from a non-integral type to another
type.
|
(package private) java.lang.Object |
getConstantValueAsObject()
Return an Object representing the bind time value of this
expression tree.
|
protected int |
getOrderableVariantType()
Return the variant type for the underlying expression.
|
(package private) boolean |
isConstantExpression()
Return whether or not this expression tree represents a constant expression.
|
(package private) boolean |
isEquivalent(ValueNode o)
Tests if this node is equivalent to the specified ValueNode.
|
(package private) ValueNode |
preprocess(int numTables,
FromList outerFromList,
SubqueryList outerSubqueryList,
PredicateList outerPredicateList)
Preprocess an expression tree.
|
(package private) void |
printSubNodes(int depth)
Prints the sub-nodes of this object.
|
(package private) ValueNode |
remapColumnReferencesToExpressions()
Remap all ColumnReferences in this tree to be clones of the
underlying expression.
|
(package private) void |
setAssignmentSemantics()
Set assignmentSemantics to true.
|
(package private) void |
setForDataTypeFunction(boolean b)
set this to be a dataTypeScalarFunction
|
(package private) void |
setForExternallyGeneratedCASTnode()
This method gets called by the parser to indiciate that this CAST node
has been generated by the parser.
|
(package private) void |
setTargetUDTName(TableName name)
Set the target type name if this is a cast to a UDT.
|
java.lang.String |
toString()
Convert this object to a String.
|
bindExpression, changeToCNF, checkIsBoolean, checkTopPredicatesForEqualsConditions, copyFields, eliminateNots, evaluateConstantExpressions, genEqualsFalseTree, generate, genIsNullTree, genSQLJavaSQLTree, getClone, getColumnName, getDataValueFactory, getSchemaName, getSourceResultColumn, getTableName, getTablesReferenced, getTransformed, getTypeCompiler, getTypeId, getTypeServices, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isCloneable, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeKind, optimizableEqualityNode, putAndsOnTop, requiresTypeFromContext, selectivity, setCollationInfo, setCollationInfo, setCollationUsingCompilationSchema, setCollationUsingCompilationSchema, setNullability, setTransformed, setType, setType, setType, updatableByCursor, verifyChangeToCNF, verifyEliminateNots, verifyPutAndsOnTop
accept, 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, referencesSessionSchema, resolveTableToSynonym, setBeginOffset, setEndOffset, setRefActionInfo, stackPrint, taggedWith, treePrint, treePrint, verifyClassExist
ValueNode castOperand
private int targetCharType
TypeId sourceCTI
private boolean forDataTypeFunction
private DataTypeDescriptor targetUDT
private boolean externallyGeneratedCastNode
private boolean assignmentSemantics
private TableName udtTargetName
CastNode(ValueNode castOperand, DataTypeDescriptor castTarget, ContextManager cm) throws StandardException
castOperand
- The operand of the nodecastTarget
- DataTypeServices (target type of cast)cm
- The context managerStandardException
- Thrown on errorCastNode(ValueNode castOperand, int charType, int charLength, ContextManager cm) throws StandardException
castOperand
- The operand of the nodecharType
- CHAR or VARCHAR JDBC type as targetcharLength
- target type lengthcm
- The context managerStandardException
- Thrown on errorpublic java.lang.String toString()
void printSubNodes(int depth)
printSubNodes
in class QueryTreeNode
depth
- The depth of this node in the treeprotected int getOrderableVariantType() throws StandardException
ValueNode
getOrderableVariantType
in class ValueNode
StandardException
- Thrown on errorValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.List<AggregateNode> aggregates) throws StandardException
bindExpression
in class ValueNode
fromList
- The FROM list for the query this
expression is in, for binding columns.subqueryList
- The subquery list being built as we find SubqueryNodesaggregates
- The aggregate list being built as we find AggregateNodesStandardException
- Thrown on errorvoid bindCastNodeOnly() throws StandardException
StandardException
- Thrown on errorprivate ValueNode getCastFromCharConstant(int destJDBCTypeId) throws StandardException
destJDBCTypeId
- The destination JDBC TypeIdStandardException
- Thrown on errorprivate ValueNode getCastFromIntegralType(long longValue, int destJDBCTypeId) throws StandardException
longValue
- integral type as a long to cast fromdestJDBCTypeId
- The destination JDBC TypeIdStandardException
- Thrown on errorprivate ValueNode getCastFromNumericType(DataValueDescriptor constantValue, int destJDBCTypeId) throws StandardException
constantValue
- non-integral type a a double to cast fromdestJDBCTypeId
- The destination JDBC TypeIdStandardException
- Thrown on errorValueNode preprocess(int numTables, FromList outerFromList, SubqueryList outerSubqueryList, PredicateList outerPredicateList) throws StandardException
preprocess
in class ValueNode
numTables
- Number of tables in the DML StatementouterFromList
- FromList from outer query blockouterSubqueryList
- SubqueryList from outer query blockouterPredicateList
- PredicateList from outer query blockStandardException
- Thrown on errorboolean categorize(JBitSet referencedTabs, boolean simplePredsOnly) throws StandardException
categorize
in class ValueNode
referencedTabs
- JBitSet with bit map of referenced FromTablessimplePredsOnly
- Whether or not to consider method
calls, field references and conditional nodes
when building bit mapStandardException
- Thrown on errorValueNode remapColumnReferencesToExpressions() throws StandardException
remapColumnReferencesToExpressions
in class ValueNode
StandardException
- Thrown on errorboolean isConstantExpression()
isConstantExpression
in class ValueNode
boolean constantExpression(PredicateList whereClause)
ValueNode
constantExpression
in class ValueNode
ValueNode.constantExpression(org.apache.derby.impl.sql.compile.PredicateList)
java.lang.Object getConstantValueAsObject() throws StandardException
getConstantValueAsObject
in class ValueNode
StandardException
- Thrown on errorvoid generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
generateExpression
in class ValueNode
acb
- The ExpressionClassBuilder for the class we're generatingmb
- The method the code to place the codeStandardException
- Thrown on errorprivate void genDataValueConversion(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
StandardException
void acceptChildren(Visitor v) throws StandardException
acceptChildren
in class QueryTreeNode
v
- the visitorStandardException
- on errorvoid setForExternallyGeneratedCASTnode()
void setForDataTypeFunction(boolean b)
b
- true to use function conversion rulesvoid setAssignmentSemantics()
boolean isEquivalent(ValueNode o) throws StandardException
This method provides basic expression matching facility for the derived class of ValueNode and it is used by the language layer to compare the node structural form of the two expressions for equivalence at bind phase.
Note that it is not comparing the actual row values at runtime to produce a result; hence, when comparing SQL NULLs, they are considered to be equivalent and not unknown.
One usage case of this method in this context is to compare the select column expression against the group by expression to check if they are equivalent. e.g.:
SELECT c1+c2 FROM t1 GROUP BY c1+c2
In general, node equivalence is determined by the derived class of ValueNode. But they generally abide to the rules below:
isEquivalent
in class ValueNode
o
- the node to compare this ValueNode against.true
if the two nodes are equivalent,
false
otherwise.StandardException
void setTargetUDTName(TableName name)
name
- the name of the target typeApache Derby V10.13 Internals - Copyright © 2004,2016 The Apache Software Foundation. All Rights Reserved.