org.apache.derby.impl.sql.compile

Class ResultSetNode

java.lang.Object

org.apache.derby.impl.sql.compile.QueryTreeNode

org.apache.derby.impl.sql.compile.ResultSetNode

All Implemented Interfaces:

Visitable

Direct Known Subclasses:

CurrentOfNode, IntersectOrExceptNode, RowCountNode

public abstract class ResultSetNode
extends QueryTreeNode

A ResultSetNode represents a result set, that is, a set of rows. It is analogous to a ResultSet in the LanguageModuleExternalInterface. In fact, code generation for a a ResultSetNode will create a "new" call to a constructor for a ResultSet.

Method Summary

Modifier and Type	Method and Description
JBitSet	getReferencedTableMap() Get the referencedTableMap for this ResultSetNode.
int	getResultSetNumber() Get the resultSetNumber in this ResultSetNode.
ResultDescription	makeResultDescription() Make a ResultDescription for use in a ResultSet.
ValueNode	parseDefault(java.lang.String defaultText) Parse a default and turn it into a query tree.
java.lang.String	toString() Convert this object to a String.

Methods inherited from class org.apache.derby.impl.sql.compile.QueryTreeNode

accept, addTag, bindOffsetFetch, bindRowMultiSet, bindUserCatalogType, bindUserType, checkReliability, checkReliability, createTypeDependency, getBeginOffset, getDataDictionary, getEndOffset, getExecutionFactory, getGenericConstantActionFactory, getOffsetOrderedNodes, getOptimizerFactory, getOptimizerTracer, getParameterTypes, getUDTDesc, isAtomic, makeConstantAction, makeTableName, makeTableName, optimizerTracingIsOn, orReliability, referencesSessionSchema, setBeginOffset, setEndOffset, taggedWith, treePrint

Methods inherited from class java.lang.Object

equals, getClass, hashCode, notify, notifyAll, wait, wait, wait

Method Detail

toString

public java.lang.String toString()

Convert this object to a String. See comments in QueryTreeNode.java for how this should be done for tree printing.

Overrides:

toString in class QueryTreeNode

Returns:

This object as a String

getResultSetNumber

public int getResultSetNumber()

Get the resultSetNumber in this ResultSetNode. Expected to be set during generate(). Must be public in order to satisfy the Optimizable contract.

Returns:

int The resultSetNumber.

getReferencedTableMap

public JBitSet getReferencedTableMap()

Get the referencedTableMap for this ResultSetNode. Must be public in order to satisfy the Optimizable contract.

Returns:

JBitSet Referenced table map for this ResultSetNode

parseDefault

public ValueNode parseDefault(java.lang.String defaultText)
                       throws StandardException

Parse a default and turn it into a query tree.

Parameters:

defaultText - Text of Default.

Returns:

The parsed default as a query tree.

Throws:

StandardException - Thrown on failure

makeResultDescription

public ResultDescription makeResultDescription()

Make a ResultDescription for use in a ResultSet. This is useful when generating/executing a NormalizeResultSet, since it can appear anywhere in the tree.

Returns:

A ResultDescription for this ResultSetNode.