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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.TernaryOperatorNode
public class TernaryOperatorNode
A TernaryOperatorNode represents a built-in ternary operators. This covers built-in functions like substr(). Java operators are not represented here: the JSQL language allows Java methods to be called from expressions, but not Java operators.
Field Summary | |
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(package private) java.lang.String |
leftInterfaceType
|
(package private) ValueNode |
leftOperand
|
static int |
LIKE
|
static int |
LOCATE
|
(package private) java.lang.String |
methodName
|
(package private) java.lang.String |
operator
|
(package private) int |
operatorType
|
(package private) ValueNode |
receiver
|
(package private) java.lang.String |
receiverInterfaceType
|
(package private) java.lang.String |
resultInterfaceType
|
(package private) java.lang.String |
rightInterfaceType
|
(package private) ValueNode |
rightOperand
|
static int |
SUBSTRING
|
(package private) static java.lang.String[][] |
TernaryArgType
|
(package private) static java.lang.String[] |
TernaryMethodNames
|
(package private) static java.lang.String[] |
TernaryOperators
|
(package private) static java.lang.String[] |
TernaryResultType
|
static int |
TIMESTAMPADD
|
static int |
TIMESTAMPDIFF
|
static int |
TRIM
|
(package private) int |
trimType
|
Fields inherited from class org.apache.derby.impl.sql.compile.ValueNode |
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transformed |
Fields inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode |
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AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX, isPrivilegeCollectionRequired |
Constructor Summary | |
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TernaryOperatorNode()
|
Method Summary | |
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(package private) void |
acceptChildren(Visitor v)
Accept the visitor for all visitable children of this node. |
private void |
bindDateTimeArg(ValueNode arg,
int argNumber)
|
ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.Vector aggregateVector)
Bind this expression. |
private boolean |
bindParameter(ValueNode arg,
int jdbcType)
This method gets called for non-character string types and hence no need to set any collation info. |
protected void |
bindToBuiltIn()
|
protected ValueNode |
castArgToString(ValueNode vn)
|
boolean |
categorize(JBitSet referencedTabs,
boolean simplePredsOnly)
Categorize this predicate. |
boolean |
constantExpression(PredicateList whereClause)
Return whether or not this expression tree represents a constant value. |
void |
generateExpression(ExpressionClassBuilder acb,
MethodBuilder mb)
Do code generation for this ternary operator. |
ValueNode |
getLeftOperand()
Get the leftOperand |
ValueNode |
getReceiver()
|
ValueNode |
getRightOperand()
Get the rightOperand |
private DataTypeDescriptor |
getVarcharDescriptor()
|
void |
init(java.lang.Object receiver,
java.lang.Object leftOperand,
java.lang.Object rightOperand,
java.lang.Object operatorType,
java.lang.Object trimType)
Initializer for a TernaryOperatorNode |
boolean |
isConstantExpression()
Return whether or not this expression tree represents a constant expression. |
protected boolean |
isEquivalent(ValueNode o)
Tests if this node is equivalent to the specified ValueNode. |
ValueNode |
locateBind()
Bind locate operator The variable receiver is the string which will searched The variable leftOperand is the search character that will looked in the receiver variable. |
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 |
setLeftOperand(ValueNode newLeftOperand)
Set the leftOperand to the specified ValueNode |
private void |
setResultType(TypeId resultType)
|
void |
setRightOperand(ValueNode newRightOperand)
Set the rightOperand to the specified ValueNode |
ValueNode |
substrBind()
Bind substr expression. |
private void |
throwBadType(java.lang.String funcName,
java.lang.String type)
|
private ValueNode |
timestampAddBind()
Bind TIMESTAMPADD expression. |
private ValueNode |
timestampDiffBind()
Bind TIMESTAMPDIFF expression. |
java.lang.String |
toString()
Convert this object to a String. |
private ValueNode |
trimBind()
Bind trim expression. |
Methods inherited from class java.lang.Object |
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clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait |
Field Detail |
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java.lang.String operator
java.lang.String methodName
int operatorType
ValueNode receiver
ValueNode leftOperand
ValueNode rightOperand
java.lang.String resultInterfaceType
java.lang.String receiverInterfaceType
java.lang.String leftInterfaceType
java.lang.String rightInterfaceType
int trimType
public static final int TRIM
public static final int LOCATE
public static final int SUBSTRING
public static final int LIKE
public static final int TIMESTAMPADD
public static final int TIMESTAMPDIFF
static final java.lang.String[] TernaryOperators
static final java.lang.String[] TernaryMethodNames
static final java.lang.String[] TernaryResultType
static final java.lang.String[][] TernaryArgType
Constructor Detail |
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public TernaryOperatorNode()
Method Detail |
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public void init(java.lang.Object receiver, java.lang.Object leftOperand, java.lang.Object rightOperand, java.lang.Object operatorType, java.lang.Object trimType)
init
in class ValueNode
receiver
- The receiver (eg, string being operated on in substr())leftOperand
- The left operand of the noderightOperand
- The right operand of the nodeoperatorType
- The type of the operandtrimType
- The maximum width of this new nodepublic 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 treepublic 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 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 void generateExpression(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
generateExpression
in class ValueNode
acb
- The ExpressionClassBuilder for the class we're generatingmb
- The method the expression will go into
StandardException
- Thrown on errorpublic void setLeftOperand(ValueNode newLeftOperand)
newLeftOperand
- The new leftOperandpublic ValueNode getLeftOperand()
public void setRightOperand(ValueNode newRightOperand)
newRightOperand
- The new rightOperandpublic ValueNode getRightOperand()
public 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 acceptChildren(Visitor v) throws StandardException
acceptChildren
in class QueryTreeNode
v
- the visitor
StandardException
- on errorprivate ValueNode trimBind() throws StandardException
StandardException
- Thrown on errorprivate void setResultType(TypeId resultType) throws StandardException
StandardException
public ValueNode locateBind() throws StandardException
StandardException
- Thrown on errorprotected ValueNode castArgToString(ValueNode vn) throws StandardException
StandardException
public ValueNode substrBind() throws StandardException
StandardException
- Thrown on errorprivate ValueNode timestampAddBind() throws StandardException
StandardException
- Thrown on errorprivate ValueNode timestampDiffBind() throws StandardException
StandardException
- Thrown on errorprivate void bindDateTimeArg(ValueNode arg, int argNumber) throws StandardException
StandardException
private boolean bindParameter(ValueNode arg, int jdbcType) throws StandardException
arg
- Check if arg is a ? param and if yes, then set it's type to
jdbcType if arg doesn't have a type associated with it.jdbcType
- Associate this type with arg if arg is a ? param with no
type associated with it
StandardException
public ValueNode getReceiver()
private void throwBadType(java.lang.String funcName, java.lang.String type) throws StandardException
StandardException
protected void bindToBuiltIn() throws StandardException
StandardException
private DataTypeDescriptor getVarcharDescriptor()
protected boolean isEquivalent(ValueNode o) throws StandardException
ValueNode
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
|
Built on Thu 2012-03-29 21:53:33+0000, from revision ??? | ||||||||
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