public class SubqueryNode extends ValueNode
Modifier and Type | Class and Description |
---|---|
static class |
SubqueryNode.SubqueryType |
AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX
Constructor and Description |
---|
SubqueryNode() |
Modifier and Type | Method and Description |
---|---|
void |
copyFrom(QueryTreeNode node)
Fill this node with a deep copy of the given node.
|
ValueNode |
getFetchFirst()
Get FETCH FIRST (used to construct FROM only), cf.
|
ValueNode |
getLeftOperand() |
ValueNode |
getOffset()
Get OFFSET (used to construct FROM only), cf.
|
OrderByList |
getOrderByList()
Get ORDER BY list (used to construct FROM only), cf.
|
ResultSetNode |
getResultSet()
Return the resultSet for this SubqueryNode.
|
SubqueryNode.SubqueryType |
getSubqueryType()
Return the type of this subquery.
|
void |
init(java.lang.Object resultSet,
java.lang.Object subqueryType,
java.lang.Object leftOperand,
java.lang.Object orderCols,
java.lang.Object offset,
java.lang.Object fetchFirst)
Initializer.
|
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 |
setResultSet(ResultSetNode resultSet) |
void |
setSubqueryType(SubqueryNode.SubqueryType subqueryType)
Set the type of this subquery.
|
java.lang.String |
toString()
Convert this object to a String.
|
getColumnName, getSchemaName, getSourceResultColumn, getTableName, getType, getTypeId, init, isBinaryEqualsOperatorNode, isBooleanFalse, isBooleanTrue, isConstantExpression, 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, init, isInstanceOf, makeTableName, makeTableName, nodeHeader, printLabel, setBeginOffset, setDebugOutput, setEndOffset, setNodeType, setParserContext, setUserData, stackPrint, treePrint, treePrint, treePrint
public void init(java.lang.Object resultSet, java.lang.Object subqueryType, java.lang.Object leftOperand, java.lang.Object orderCols, java.lang.Object offset, java.lang.Object fetchFirst)
init
in class QueryTreeNode
resultSet
- The ResultSetNode for the subquerysubqueryType
- The type of the subqueryleftOperand
- The left operand, if any, of the subqueryorderCols
- ORDER BY listoffset
- OFFSET n ROWSfetchFirst
- FETCH FIRST n ROWS ONLYpublic void copyFrom(QueryTreeNode node) throws StandardException
copyFrom
in class ValueNode
StandardException
public java.lang.String toString()
public void printSubNodes(int depth)
printSubNodes
in class QueryTreeNode
depth
- The depth of this node in the treepublic ResultSetNode getResultSet()
public void setResultSet(ResultSetNode resultSet)
public SubqueryNode.SubqueryType getSubqueryType()
public void setSubqueryType(SubqueryNode.SubqueryType subqueryType)
subqueryType
- of this subquery.protected boolean isEquivalent(ValueNode o)
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.public OrderByList getOrderByList()
public ValueNode getOffset()
public ValueNode getFetchFirst()
public ValueNode getLeftOperand()
Copyright © 2013. All Rights Reserved.