com.foundationdb.sql.parser

Class SetOperatorNode

java.lang.Object

com.foundationdb.sql.parser.QueryTreeNode

com.foundationdb.sql.parser.ResultSetNode

com.foundationdb.sql.parser.FromTable

com.foundationdb.sql.parser.SetOperatorNode

All Implemented Interfaces:

Visitable

Direct Known Subclasses:

IntersectOrExceptNode, UnionNode

public abstract class SetOperatorNode
extends FromTable

A SetOperatorNode represents a UNION, INTERSECT, or EXCEPT in a DML statement. Binding and optimization preprocessing is the same for all of these operations, so they share bind methods in this abstract class. The class contains a boolean telling whether the 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
SetOperatorNode()

Method Summary

Methods

Modifier and Type	Method and Description
void	copyFrom(QueryTreeNode node) Fill this node with a deep copy of the given node.
ResultColumnList	copyResultColumnsFromLeft() Deep copy of the left result ResultColumnList.
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 tableProperties) Initializer for a SetOperatorNode.
boolean	isAll()
void	printSubNodes(int depth) Prints the sub-nodes of this object.
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.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, 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

SetOperatorNode

public SetOperatorNode()

Method Detail

init

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

Initializer for a SetOperatorNode.

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 an ALL.

tableProperties - Properties list associated with the table

Throws:

StandardException - Thrown on error

copyResultColumnsFromLeft

public ResultColumnList copyResultColumnsFromLeft()
                                           throws StandardException

Deep copy of the left result ResultColumnList.

Returns:

Throws:

StandardException

copyFrom

public void copyFrom(QueryTreeNode node)
              throws StandardException

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

Throws:

StandardException

toString

public String toString()

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

Returns:

This object as a String

printSubNodes

public void printSubNodes(int depth)

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

Parameters:

depth - The depth of this node in the tree

isAll

public boolean isAll()

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.