org.teiid.query.optimizer.relational.rules

Class FrameUtil

java.lang.Object

org.teiid.query.optimizer.relational.rules.FrameUtil

public class FrameUtil
extends Object

Constructor Summary

Constructors

Constructor and Description
FrameUtil()

Method Summary

Modifier and Type	Method and Description
static LinkedHashMap<ElementSymbol,Expression>	buildSymbolMap(GroupSymbol oldGroup, GroupSymbol newGroup, QueryMetadataInterface metadata) creates a symbol map of elements in oldGroup mapped to corresponding elements in newGroup if newGroup is null, then a mapping of oldGroup elements to null constants will be returned
static void	convertFrame(PlanNode startNode, GroupSymbol oldGroup, Set<GroupSymbol> newGroups, Map symbolMap, QueryMetadataInterface metadata)
static PlanNode	findJoinSourceNode(PlanNode root) Find the ACCESS, SOURCE, SET_OP, JOIN, or NULL node that originates the given groups, but will stop at the first join node rather than searching for the best fit.
static ProcessorPlan	getNestedPlan(PlanNode accessNode) Look for SOURCE node either one or two steps below the access node.
static boolean	isOrderedOrStrictLimit(PlanNode node)

Methods inherited from class java.lang.Object

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

Constructor Detail

FrameUtil

public FrameUtil()

Method Detail

convertFrame

public static void convertFrame(PlanNode startNode,
                                GroupSymbol oldGroup,
                                Set<GroupSymbol> newGroups,
                                Map symbolMap,
                                QueryMetadataInterface metadata)
                         throws QueryPlannerException

Throws:

QueryPlannerException

buildSymbolMap

public static LinkedHashMap<ElementSymbol,Expression> buildSymbolMap(GroupSymbol oldGroup,
                                                                     GroupSymbol newGroup,
                                                                     QueryMetadataInterface metadata)
                                                              throws QueryMetadataException,
                                                                     TeiidComponentException

creates a symbol map of elements in oldGroup mapped to corresponding elements in newGroup if newGroup is null, then a mapping of oldGroup elements to null constants will be returned

Parameters:

oldGroup -

newGroup -

metadata -

Returns:

Throws:

QueryMetadataException

TeiidComponentException

findJoinSourceNode

public static PlanNode findJoinSourceNode(PlanNode root)

Find the ACCESS, SOURCE, SET_OP, JOIN, or NULL node that originates the given groups, but will stop at the first join node rather than searching for the best fit. Returns null if the originating node cannot be found.

Parameters:

root -

groups -

Returns:

getNestedPlan

public static ProcessorPlan getNestedPlan(PlanNode accessNode)

Look for SOURCE node either one or two steps below the access node. Typically these options look like ACCESS-SOURCE or ACCESS-PROJECT-SOURCE.

Parameters:

accessNode -

Returns:

isOrderedOrStrictLimit

public static boolean isOrderedOrStrictLimit(PlanNode node)