com.foundationdb.sql.parser

Class UnionNode

java.lang.Object

com.foundationdb.sql.parser.QueryTreeNode

com.foundationdb.sql.parser.ResultSetNode

com.foundationdb.sql.parser.FromTable

com.foundationdb.sql.parser.SetOperatorNode

com.foundationdb.sql.parser.UnionNode

All Implemented Interfaces:

Visitable

public class UnionNode
extends SetOperatorNode

A UnionNode represents a UNION in a DML statement. It contains a boolean telling whether the union operation should eliminate duplicate rows.

Field Summary

Fields

Modifier and Type	Field and Description
protected ResultSetNode	leftResultSet
protected ResultSetNode	rightResultSet

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
UnionNode()

Method Summary

Methods

Modifier and Type	Method and Description
void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
String	getExposedName() Return the exposed name for this table, which is the name that can be used to refer to this table in the rest of the query.
ResultSetNode	getLeftmostResultSet()
ResultSetNode	getLeftResultSet() Get the leftResultSet from this node.
ResultSetNode	getRightResultSet() Get the rightResultSet from this node.
void	init(Object leftResultSet, Object rightResultSet, Object tableProperties) Initializer for a TableOperatorNode.
void	init(Object leftResult, Object rightResult, Object all, Object tableConstructor, Object tableProperties) Initializer for a UnionNode.
void	markTopTableConstructor() Mark this as the top node of a table constructor.
void	setLeftmostResultSet(ResultSetNode newLeftResultSet)
void	setLeftResultSet(ResultSetNode leftResultSet)
void	setNestedInParens(boolean nestedInParens) Mark whether or not this node is nested in parens.
void	setRightResultSet(ResultSetNode rightResultSet)
String	toString() Convert this object to a String.

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

copyResultColumnsFromLeft, init, isAll, printSubNodes

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

getCorrelationName, getOrigTableName, getTableName, init, setCorrelationName, setOrigTableName

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, 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

Field Detail

leftResultSet

protected ResultSetNode leftResultSet

rightResultSet

protected ResultSetNode rightResultSet

Constructor Detail

UnionNode

public UnionNode()

Method Detail

init

public void init(Object leftResult,
        Object rightResult,
        Object all,
        Object tableConstructor,
        Object tableProperties)
          throws StandardException

Initializer for a UnionNode.

Overrides:

init in class QueryTreeNode

Parameters:

leftResult - The ResultSetNode on the left side of this union

rightResult - The ResultSetNode on the right side of this union

all - Whether or not this is a UNION ALL.

tableConstructor - Whether or not this is from a table constructor.

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.

Overrides:

copyFrom in class SetOperatorNode

Throws:

StandardException

markTopTableConstructor

public void markTopTableConstructor()

Mark this as the top node of a table constructor.

toString

public 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 SetOperatorNode

Returns:

This object as a String

init

public void init(Object leftResultSet,
        Object rightResultSet,
        Object tableProperties)
          throws StandardException

Initializer for a TableOperatorNode.

Overrides:

init in class QueryTreeNode

Parameters:

leftResultSet - The ResultSetNode on the left side of this node

rightResultSet - The ResultSetNode on the right side of this node

tableProperties - Properties list associated with the table

Throws:

StandardException - Thrown on error

getLeftResultSet

public ResultSetNode getLeftResultSet()

Get the leftResultSet from this node.

Returns:

ResultSetNode The leftResultSet from this node.

getRightResultSet

public ResultSetNode getRightResultSet()

Get the rightResultSet from this node.

Returns:

ResultSetNode The rightResultSet from this node.

setLeftResultSet

public void setLeftResultSet(ResultSetNode leftResultSet)

setRightResultSet

public void setRightResultSet(ResultSetNode rightResultSet)

getLeftmostResultSet

public ResultSetNode getLeftmostResultSet()

setLeftmostResultSet

public void setLeftmostResultSet(ResultSetNode newLeftResultSet)

getExposedName

public String getExposedName()

Return the exposed name for this table, which is the name that can be used to refer to this table in the rest of the query.

Overrides:

getExposedName in class FromTable

Returns:

The exposed name for this table.

setNestedInParens

public void setNestedInParens(boolean nestedInParens)

Mark whether or not this node is nested in parens. (Useful to parser since some trees get created left deep and others right deep.) The resulting state of this cal was never used so its field was removed to save runtimespace for this node. Further cleanup can be done including parser changes if this call is really nor required.

Parameters:

nestedInParens - Whether or not this node is nested in parens.