public class BinaryOperatorNode extends ValueNode
Modifier and Type | Class and Description |
---|---|
static class |
BinaryOperatorNode.OperatorType |
Modifier and Type | Field and Description |
---|---|
protected java.lang.String |
leftInterfaceType |
protected ValueNode |
leftOperand |
protected java.lang.String |
methodName |
protected java.lang.String |
operator |
protected java.lang.String |
resultInterfaceType |
protected java.lang.String |
rightInterfaceType |
protected ValueNode |
rightOperand |
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
BinaryOperatorNode() |
Modifier and Type | Method and Description |
---|---|
void |
copyFrom(QueryTreeNode node)
Fill this node with a deep copy of the given node.
|
ValueNode |
getLeftOperand()
Get the leftOperand
|
java.lang.String |
getMethodName() |
java.lang.String |
getOperator() |
ValueNode |
getRightOperand()
Get the rightOperand
|
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
|
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.
|
void |
printSubNodes(int depth)
Prints the sub-nodes of this object.
|
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.
|
void |
setRightOperand(ValueNode newRightOperand)
Set the rightOperand to the specified ValueNode
|
java.lang.String |
toString()
Convert this object to a String.
|
getColumnName, getSchemaName, getSourceResultColumn, getTableName, getType, getTypeId, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isInListProbeNode, isParameterNode, isRelationalOperator, isSameNodeType, setNullability, setType
accept, convertDefaultNode, debugFlush, debugPrint, formatNodeString, getBeginOffset, getDebugOutput, getEndOffset, getNodeFactory, getNodeType, getNullNode, getParserContext, getStatementType, getUserData, init, init, init, init, init, init, init, init, init, init, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint
protected java.lang.String operator
protected java.lang.String methodName
protected ValueNode leftOperand
protected ValueNode rightOperand
protected java.lang.String leftInterfaceType
protected java.lang.String rightInterfaceType
protected java.lang.String resultInterfaceType
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 copyFrom(QueryTreeNode node) throws StandardException
copyFrom
in class ValueNode
StandardException
public java.lang.String toString()
public java.lang.String getOperator()
public java.lang.String getMethodName()
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 void setLeftOperand(ValueNode newLeftOperand)
newLeftOperand
- The new leftOperandpublic ValueNode getLeftOperand()
public void setRightOperand(ValueNode newRightOperand)
newRightOperand
- The new rightOperandpublic ValueNode getRightOperand()
public boolean isConstantExpression()
isConstantExpression
in class ValueNode
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
Copyright © 2013. All Rights Reserved.