com.foundationdb.sql.parser

Class DistinctNode

java.lang.Object

com.foundationdb.sql.parser.QueryTreeNode

com.foundationdb.sql.parser.ResultSetNode

com.foundationdb.sql.parser.FromTable

com.foundationdb.sql.parser.DistinctNode

All Implemented Interfaces:

Visitable

public class DistinctNode
extends FromTable

A DistinctNode represents a result set for a disinct operation on a select. It has the same description as its input result set. For the most part, it simply delegates operations to its childResultSet, which is currently expected to be a ProjectRestrictResultSet generated for a SelectNode. NOTE: A DistinctNode extends FromTable since it can exist in a FromList.

Field Summary

Fields inherited from class com.foundationdb.sql.parser.FromTable

correlationName, origTableName, tableProperties

Fields inherited from class com.foundationdb.sql.parser.QueryTreeNode

AUTOINCREMENT_CREATE_MODIFY, AUTOINCREMENT_INC_INDEX, AUTOINCREMENT_IS_AUTOINCREMENT_INDEX, AUTOINCREMENT_START_INDEX

Constructor Summary

Constructors

Constructor and Description
DistinctNode()

Method Summary

Methods

Modifier and Type	Method and Description
void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
ResultSetNode	getChildResult() Return the childResult from this node.
void	init(Object childResult, Object tableProperties) Initialilzer for a SingleChildResultSetNode.
void	init(Object childResult, Object inSortedOrder, Object tableProperties) Initializer for a DistinctNode.
void	printSubNodes(int depth) Prints the sub-nodes of this object.

Methods inherited from class com.foundationdb.sql.parser.FromTable

getCorrelationName, getExposedName, getOrigTableName, getTableName, setCorrelationName, setOrigTableName, toString

Methods inherited from class com.foundationdb.sql.parser.ResultSetNode

getResultColumns, setInsertSource, setResultColumns

Methods inherited from class com.foundationdb.sql.parser.QueryTreeNode

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

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, wait, wait, wait

Constructor Detail

DistinctNode

public DistinctNode()

Method Detail

init

public void init(Object childResult,
        Object inSortedOrder,
        Object tableProperties)
          throws StandardException

Initializer for a DistinctNode.

Overrides:

init in class QueryTreeNode

Parameters:

childResult - The child ResultSetNode

inSortedOrder - Whether or not the child ResultSetNode returns its output in sorted order.

tableProperties - Properties list associated with the table

Throws:

StandardException - Thrown on error

copyFrom

public void copyFrom(QueryTreeNode node)
              throws StandardException

Fill this node with a deep copy of the given node.

Throws:

StandardException

init

public void init(Object childResult,
        Object tableProperties)

Initialilzer for a SingleChildResultSetNode.

Overrides:

init in class FromTable

Parameters:

childResult - The child ResultSetNode

tableProperties - Properties list associated with the table

getChildResult

public ResultSetNode getChildResult()

Return the childResult from this node.

Returns:

ResultSetNode The childResult from this node.

printSubNodes

public void printSubNodes(int depth)

Prints the sub-nodes of this object. See QueryTreeNode.java for how tree printing is supposed to work.

Overrides:

printSubNodes in class ResultSetNode

Parameters:

depth - The depth of this node in the tree