org.apache.hadoop.hive.ql.metadata

Class MaterializedViewsCache

java.lang.Object

org.apache.hadoop.hive.ql.metadata.MaterializedViewsCache

public class MaterializedViewsCache
extends Object

Collection for storing HiveRelOptMaterializations. Materialization can be lookup by - the Materialized View fully qualified name - query text. This implementation contains two ConcurrentHashMap one for name based and one for query text based lookup. The map contents are synchronized during each dml operation: Dml operations are performed initially on the map which provides name based lookup. The map which provides query text based lookup is updated by lambda expressions passed to ConcurrentHashMap.compute(Object, BiFunction).

Constructor Summary

Constructors

Constructor and Description
MaterializedViewsCache()

Method Summary

Modifier and Type	Method and Description
List<HiveRelOptMaterialization>	get(ASTNode astNode)
boolean	isEmpty()
void	putIfAbsent(Table materializedViewTable, HiveRelOptMaterialization materialization)
void	refresh(Table oldMaterializedViewTable, Table materializedViewTable, HiveRelOptMaterialization newMaterialization)
void	remove(String dbName, String tableName)
void	remove(Table materializedViewTable)
List<HiveRelOptMaterialization>	values()

Methods inherited from class java.lang.Object

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

Constructor Detail

MaterializedViewsCache

public MaterializedViewsCache()

Method Detail

putIfAbsent

public void putIfAbsent(Table materializedViewTable,
                        HiveRelOptMaterialization materialization)

refresh

public void refresh(Table oldMaterializedViewTable,
                    Table materializedViewTable,
                    HiveRelOptMaterialization newMaterialization)

remove

public void remove(Table materializedViewTable)

remove

public void remove(String dbName,
                   String tableName)

values

public List<HiveRelOptMaterialization> values()

get

public List<HiveRelOptMaterialization> get(ASTNode astNode)

isEmpty

public boolean isEmpty()