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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.BinaryOperatorNode
public class BinaryOperatorNode
A BinaryOperatorNode represents a built-in binary operator as defined by the ANSI/ISO SQL standard. This covers operators like +, -, *, /, =, <, etc. 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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static int |
AND
|
(package private) static java.lang.String[][] |
BinaryArgTypes
|
(package private) static java.lang.String[] |
BinaryMethodNames
|
(package private) static java.lang.String[] |
BinaryOperators
|
(package private) static java.lang.String[] |
BinaryResultTypes
|
static int |
CONCATENATE
|
static int |
DIVIDE
|
static int |
EQ
|
static int |
GE
|
static int |
GT
|
static int |
LE
|
(package private) java.lang.String |
leftInterfaceType
|
(package private) ValueNode |
leftOperand
|
static int |
LIKE
|
static int |
LT
|
(package private) java.lang.String |
methodName
|
static int |
MINUS
|
static int |
NE
|
(package private) java.lang.String |
operator
|
(package private) int |
operatorType
|
static int |
OR
|
static int |
PLUS
|
(package private) ValueNode |
receiver
|
(package private) java.lang.String |
resultInterfaceType
|
(package private) java.lang.String |
rightInterfaceType
|
(package private) ValueNode |
rightOperand
|
private SqlXmlUtil |
sqlxUtil
|
static int |
TIMES
|
static int |
XMLEXISTS_OP
|
static int |
XMLQUERY_OP
|
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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BinaryOperatorNode()
|
Method Summary | |
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(package private) void |
acceptChildren(Visitor v)
Accept the visitor for all visitable children of this node. |
private int |
addXmlOpMethodParams(ExpressionClassBuilder acb,
MethodBuilder mb)
Push the fields necessary to generate an instance of SqlXmlExecutor, which will then be used at execution time to retrieve the compiled XML query expression, along with any other XML-specific objects. |
ValueNode |
bindExpression(FromList fromList,
SubqueryList subqueryList,
java.util.Vector aggregateVector)
Bind this expression. |
ValueNode |
bindXMLQuery()
Bind an XMLEXISTS or XMLQUERY operator. |
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 binary operator. |
ValueNode |
genSQLJavaSQLTree()
generate a SQL->Java->SQL conversion tree above the left and right operand of this Binary Operator Node if needed. |
ValueNode |
getLeftOperand()
Get the leftOperand |
protected int |
getOrderableVariantType()
Return the variant type for the underlying expression. |
java.lang.String |
getReceiverInterfaceName()
Determine the type the binary method is called on. |
ValueNode |
getRightOperand()
Get the rightOperand |
void |
init(java.lang.Object leftOperand,
java.lang.Object rightOperand,
java.lang.Object opType)
Initializer for a BinaryOperatorNode |
void |
init(java.lang.Object leftOperand,
java.lang.Object rightOperand,
java.lang.Object leftInterfaceType,
java.lang.Object rightInterfaceType)
Initialize a query tree node. |
void |
init(java.lang.Object leftOperand,
java.lang.Object rightOperand,
java.lang.Object operator,
java.lang.Object methodName,
java.lang.Object leftInterfaceType,
java.lang.Object rightInterfaceType)
Initializer for a BinaryOperatorNode |
protected void |
initializeResultField(ExpressionClassBuilder acb,
MethodBuilder mb,
LocalField resultField)
|
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 |
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 |
void |
setLeftRightInterfaceType(java.lang.String iType)
Set the interface type for the left and right arguments. |
(package private) void |
setMethodName(java.lang.String methodName)
Set the methodName. |
(package private) void |
setOperator(java.lang.String operator)
Set the operator. |
void |
setRightOperand(ValueNode newRightOperand)
Set the rightOperand to the specified ValueNode |
java.lang.String |
toString()
Convert this object to a String. |
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
ValueNode receiver
public static final int PLUS
public static final int MINUS
public static final int TIMES
public static final int DIVIDE
public static final int CONCATENATE
public static final int EQ
public static final int NE
public static final int GT
public static final int GE
public static final int LT
public static final int LE
public static final int AND
public static final int OR
public static final int LIKE
ValueNode leftOperand
ValueNode rightOperand
java.lang.String leftInterfaceType
java.lang.String rightInterfaceType
java.lang.String resultInterfaceType
int operatorType
public static final int XMLEXISTS_OP
public static final int XMLQUERY_OP
static final java.lang.String[] BinaryOperators
static final java.lang.String[] BinaryMethodNames
static final java.lang.String[] BinaryResultTypes
static final java.lang.String[][] BinaryArgTypes
private SqlXmlUtil sqlxUtil
Constructor Detail |
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public BinaryOperatorNode()
Method Detail |
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public void init(java.lang.Object leftOperand, java.lang.Object rightOperand, java.lang.Object operator, java.lang.Object methodName, java.lang.Object leftInterfaceType, java.lang.Object rightInterfaceType)
init
in class QueryTreeNode
leftOperand
- The left operand of the noderightOperand
- The right operand of the nodeoperator
- The name of the operatormethodName
- The name of the method to call for this operatorleftInterfaceType
- The name of the interface for the left operandrightInterfaceType
- The name of the interface for the right
operandpublic void init(java.lang.Object leftOperand, java.lang.Object rightOperand, java.lang.Object leftInterfaceType, java.lang.Object rightInterfaceType)
QueryTreeNode
init
in class QueryTreeNode
public void init(java.lang.Object leftOperand, java.lang.Object rightOperand, java.lang.Object opType)
init
in class QueryTreeNode
leftOperand
- The left operand of the noderightOperand
- The right operand of the nodeopType
- An Integer holding the operatorType
for this operator.public java.lang.String toString()
toString
in class ValueNode
void setOperator(java.lang.String operator)
operator
- The operator.void setMethodName(java.lang.String methodName)
methodName
- The methodName.public void setLeftRightInterfaceType(java.lang.String iType)
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 bindXMLQuery() throws StandardException
StandardException
- Thrown on errorpublic ValueNode genSQLJavaSQLTree() throws StandardException
genSQLJavaSQLTree
in class ValueNode
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 code to place the code
StandardException
- Thrown on errorprotected void initializeResultField(ExpressionClassBuilder acb, MethodBuilder mb, LocalField resultField) throws StandardException
StandardException
public 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)
public java.lang.String getReceiverInterfaceName() throws StandardException
StandardException
- Thrown on errorprotected int getOrderableVariantType() throws StandardException
getOrderableVariantType
in class ValueNode
StandardException
- thrown on errorvoid acceptChildren(Visitor v) throws StandardException
acceptChildren
in class QueryTreeNode
v
- the visitor
StandardException
- on errorprotected 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
private int addXmlOpMethodParams(ExpressionClassBuilder acb, MethodBuilder mb) throws StandardException
acb
- The ExpressionClassBuilder for the class we're generatingmb
- The method the code to place the code
StandardException
|
Built on Thu 2012-03-29 21:53:33+0000, from revision ??? | ||||||||
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