org.teiid.query.optimizer.relational.rules

Class RuleDecomposeJoin

java.lang.Object

org.teiid.query.optimizer.relational.rules.RuleDecomposeJoin

All Implemented Interfaces:

OptimizerRule

public class RuleDecomposeJoin
extends Object
implements OptimizerRule

Perform the optimization:

                  source
 inner join         union all
   source             inner join
     union all  =>      source
       a                  a
       b                source
   source                 c
     union all        inner join
       c                source
       d                  b
                        source
                          d
 

Field Summary

Fields

Modifier and Type	Field and Description
static String	IMPLICIT_PARTITION_COLUMN_NAME

Constructor Summary

Constructors

Constructor and Description
RuleDecomposeJoin()

Method Summary

Modifier and Type	Method and Description
PlanNode	decomposeJoin(PlanNode joinNode, PlanNode root, QueryMetadataInterface metadata, CommandContext context)
PlanNode	execute(PlanNode plan, QueryMetadataInterface metadata, CapabilitiesFinder capabilitiesFinder, RuleStack rules, AnalysisRecord analysisRecord, CommandContext context)
String	toString()

Methods inherited from class java.lang.Object

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

Field Detail

IMPLICIT_PARTITION_COLUMN_NAME

public static final String IMPLICIT_PARTITION_COLUMN_NAME

See Also:

Constant Field Values

Constructor Detail

RuleDecomposeJoin

public RuleDecomposeJoin()

Method Detail

execute

public PlanNode execute(PlanNode plan,
                        QueryMetadataInterface metadata,
                        CapabilitiesFinder capabilitiesFinder,
                        RuleStack rules,
                        AnalysisRecord analysisRecord,
                        CommandContext context)
                 throws QueryPlannerException,
                        QueryMetadataException,
                        TeiidComponentException

Specified by:

execute in interface OptimizerRule

Throws:

QueryPlannerException

QueryMetadataException

TeiidComponentException

decomposeJoin

public PlanNode decomposeJoin(PlanNode joinNode,
                              PlanNode root,
                              QueryMetadataInterface metadata,
                              CommandContext context)
                       throws TeiidComponentException,
                              QueryPlannerException

Throws:

TeiidComponentException

QueryPlannerException

toString

public String toString()

Overrides:

toString in class Object