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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.CastNode
An CastNode represents a cast expressionr.
Field Summary | |
(package private) ValueNode |
castOperand
|
(package private) DataTypeDescriptor |
castTarget
|
(package private) TypeId |
destCTI
|
(package private) boolean |
forDataTypeFunction
|
(package private) TypeId |
sourceCTI
|
(package private) int |
targetCharType
|
Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode |
clause, dataTypeServices, IN_HAVING_CLAUSE, IN_SELECT_LIST, IN_UNKNOWN_CLAUSE, IN_WHERE_CLAUSE, transformed |
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode |
AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, beginOffset, endOffset |
Constructor Summary | |
CastNode()
|
Method Summary | |
Visitable |
accept(Visitor v)
Accept a visitor, and call v.visit() on child nodes as necessary. |
void |
bindCastNodeOnly()
Bind this node but not its child. |
ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.Vector aggregateVector)
Bind this expression. |
(package private) void |
bindParameter()
By default unary operators don't accept ? |
boolean |
categorize(JBitSet referencedTabs,
boolean simplePredsOnly)
Categorize this predicate. |
boolean |
constantExpression(PredicateList whereClause)
Return whether or not this expression tree represents a constant value. |
private void |
genDataValueConversion(ExpressionClassBuilder acb,
MethodBuilder mb)
|
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 |
getCastFromNonIntegralType(double doubleValue,
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. |
boolean |
getForDataTypeFunction()
is this a cast node for a data type scalar function? |
protected int |
getOrderableVariantType()
Return the variant type for the underlying expression. |
void |
init(java.lang.Object castOperand,
java.lang.Object castTarget)
Initializer for a CastNode |
void |
init(java.lang.Object castOperand,
java.lang.Object charType,
java.lang.Object charLength)
Initializer for a CastNode |
boolean |
isConstantExpression()
Return whether or not this expression tree represents a constant expression. |
ValueNode |
preprocess(int numTables,
FromList outerFromList,
SubqueryList outerSubqueryList,
PredicateList outerPredicateList)
Preprocess an expression tree. |
void |
printSubNodes(int depth)
Prints the sub-nodes of this object. |
ValueNode |
remapColumnReferencesToExpressions()
Remap all ColumnReferences in this tree to be clones of the underlying expression. |
void |
setClause(int clause)
Set the clause that this node appears in. |
void |
setForDataTypeFunction(boolean b)
set this to be a dataTypeScalarFunction |
java.lang.String |
toString()
Convert this object to a String. |
Methods inherited from class java.lang.Object |
clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
DataTypeDescriptor castTarget
ValueNode castOperand
int targetCharType
TypeId destCTI
TypeId sourceCTI
boolean forDataTypeFunction
Constructor Detail |
public CastNode()
Method Detail |
public void init(java.lang.Object castOperand, java.lang.Object castTarget) throws StandardException
init
in class QueryTreeNode
castOperand
- The operand of the nodecastTarget
- DataTypeServices (target type of cast)
StandardException
- Thrown on errorpublic void init(java.lang.Object castOperand, java.lang.Object charType, java.lang.Object charLength) throws StandardException
init
in class QueryTreeNode
castOperand
- The operand of the nodecharType
- CHAR or VARCHAR JDBC type as targetcharLength
- target type length
StandardException
- Thrown on errorpublic java.lang.String toString()
toString
in class ValueNode
public void printSubNodes(int depth)
printSubNodes
in class QueryTreeNode
depth
- The depth of this node in the tree
protected int getOrderableVariantType() throws StandardException
ValueNode
getOrderableVariantType
in class ValueNode
StandardException
- Thrown on errorpublic void setClause(int clause)
setClause
in class ValueNode
clause
- The clause that this node appears in.
public ValueNode bindExpression(FromList fromList, SubqueryList subqueryList, java.util.Vector aggregateVector) 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 SubqueryNodesaggregateVector
- The aggregate vector being built as we find AggregateNodes
StandardException
- Thrown on errorpublic void bindCastNodeOnly() throws StandardException
StandardException
- Thrown on errorprivate ValueNode getCastFromCharConstant(int destJDBCTypeId) throws StandardException
destJDBCTypeId
- The destination JDBC TypeId
StandardException
- Thrown on errorprivate ValueNode getCastFromIntegralType(long longValue, int destJDBCTypeId) throws StandardException
longValue
- integral type as a long to cast fromdestJDBCTypeId
- The destination JDBC TypeId
StandardException
- Thrown on errorprivate ValueNode getCastFromNonIntegralType(double doubleValue, int destJDBCTypeId) throws StandardException
doubleValue
- non-integral type a a double to cast fromdestJDBCTypeId
- The destination JDBC TypeId
StandardException
- Thrown on errorpublic ValueNode 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 block
StandardException
- Thrown on errorpublic boolean 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 map
StandardException
- Thrown on errorpublic ValueNode remapColumnReferencesToExpressions() throws StandardException
remapColumnReferencesToExpressions
in class ValueNode
StandardException
- Thrown on errorpublic boolean isConstantExpression()
isConstantExpression
in class ValueNode
public boolean constantExpression(PredicateList whereClause)
ValueNode
constantExpression
in class ValueNode
ValueNode.constantExpression(org.apache.derby.impl.sql.compile.PredicateList)
void bindParameter() throws StandardException
StandardException
- Always thrown to indicate a
? parameter where it isn't allowed.java.lang.Object getConstantValueAsObject() throws StandardException
getConstantValueAsObject
in class ValueNode
StandardException
- Thrown on errorpublic void 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 code
StandardException
- Thrown on errorprivate void genDataValueConversion(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
StandardException
public Visitable accept(Visitor v) throws StandardException
accept
in interface Visitable
accept
in class QueryTreeNode
v
- the visitor
StandardException
- on errorpublic void setForDataTypeFunction(boolean b)
b
- true to use function conversion rulespublic boolean getForDataTypeFunction()
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