com.espertech.esper.epl.join.plan

Class QueryPlanIndex

java.lang.Object

com.espertech.esper.epl.join.plan.QueryPlanIndex

public class QueryPlanIndex
extends Object

Specifies an index to build as part of an overall query plan.

Constructor Summary

Constructors

Constructor and Description
QueryPlanIndex(Map<TableLookupIndexReqKey,QueryPlanIndexItem> items)

Method Summary

Modifier and Type	Method and Description
String	addIndex(String[] indexProperties, Class[] coercionTypes) Add an index specification element.
Class[]	getCoercionTypes(String[] indexProperties) Returns a list of coercion types for a given index.
protected TableLookupIndexReqKey	getFirstIndexNum()
protected Pair<TableLookupIndexReqKey,int[]>	getIndexNum(String[] indexProps, String[] rangeProps) Find a matching index for the property names supplied.
String[][]	getIndexProps() For testing - Returns property names of all indexes.
Map<TableLookupIndexReqKey,QueryPlanIndexItem>	getItems()
static QueryPlanIndex	makeIndex(List<QueryPlanIndexItem> indexesSet)
static QueryPlanIndex	makeIndex(QueryPlanIndexItem... items)
static QueryPlanIndex	makeIndexTableAccess(TableLookupIndexReqKey indexName)
static String	print(QueryPlanIndex[] indexSpecs) Print index specifications in readable format.
void	setCoercionTypes(String[] indexProperties, Class[] coercionTypes) Sets the coercion types for a given index.
String	toString()

Methods inherited from class java.lang.Object

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

Constructor Detail

QueryPlanIndex

public QueryPlanIndex(Map<TableLookupIndexReqKey,QueryPlanIndexItem> items)

Method Detail

getItems

public Map<TableLookupIndexReqKey,QueryPlanIndexItem> getItems()

makeIndex

public static QueryPlanIndex makeIndex(QueryPlanIndexItem... items)

makeIndex

public static QueryPlanIndex makeIndex(List<QueryPlanIndexItem> indexesSet)

getIndexNum

protected Pair<TableLookupIndexReqKey,int[]> getIndexNum(String[] indexProps,
                                                         String[] rangeProps)

Find a matching index for the property names supplied.

Parameters:

indexProps - - property names to search for

rangeProps - - range props

Returns:

-1 if not found, or offset within indexes if found

getFirstIndexNum

protected TableLookupIndexReqKey getFirstIndexNum()

addIndex

public String addIndex(String[] indexProperties,
                       Class[] coercionTypes)

Add an index specification element.

Parameters:

indexProperties - - list of property names to index

coercionTypes - - list of coercion types if required, or null if no coercion required

Returns:

number indicating position of index that was added

getIndexProps

public String[][] getIndexProps()

For testing - Returns property names of all indexes.

Returns:

property names array

getCoercionTypes

public Class[] getCoercionTypes(String[] indexProperties)

Returns a list of coercion types for a given index.

Parameters:

indexProperties - is the index field names

Returns:

coercion types, or null if no coercion is required

setCoercionTypes

public void setCoercionTypes(String[] indexProperties,
                             Class[] coercionTypes)

Sets the coercion types for a given index.

Parameters:

indexProperties - is the index property names

coercionTypes - is the coercion types

toString

public String toString()

Overrides:

toString in class Object

print

public static String print(QueryPlanIndex[] indexSpecs)

Print index specifications in readable format.

Parameters:

indexSpecs - - define indexes

Returns:

readable format of index info

makeIndexTableAccess

public static QueryPlanIndex makeIndexTableAccess(TableLookupIndexReqKey indexName)