AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
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ParameterNode() |
Modifier and Type | Method and Description |
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void |
copyFrom(QueryTreeNode node)
Fill this node with a deep copy of the given node.
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int |
getParameterNumber()
Get the parameter number
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void |
init(java.lang.Object parameterNumber,
java.lang.Object defaultValue)
Initializer for a ParameterNode.
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protected boolean |
isEquivalent(ValueNode o)
Tests if this node is equivalent to the specified ValueNode.
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boolean |
isParameterNode()
Returns TRUE if this is a parameter node.
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boolean |
isReturnOutputParam()
Is this as a return output parameter (e.g.
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void |
setReturnOutputParam(ValueNode valueNode)
Mark this as a return output parameter (e.g.
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java.lang.String |
toString()
Convert this object to a String.
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getColumnName, getSchemaName, getSourceResultColumn, getTableName, getType, getTypeId, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isConstantExpression, isInListProbeNode, 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, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, printSubNodes, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint
public void init(java.lang.Object parameterNumber, java.lang.Object defaultValue)
init
in class QueryTreeNode
parameterNumber
- The number of this parameter,
(unique per query starting at 0)defaultValue
- The default value for this parameterpublic void copyFrom(QueryTreeNode node) throws StandardException
copyFrom
in class ValueNode
StandardException
public int getParameterNumber()
public void setReturnOutputParam(ValueNode valueNode)
public boolean isReturnOutputParam()
public boolean isParameterNode()
ValueNode
isParameterNode
in class ValueNode
ValueNode.isParameterNode()
protected boolean isEquivalent(ValueNode o)
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.Copyright © 2013. All Rights Reserved.