Package org.apache.hadoop.hive.metastore

Interface Summary

Interface	Description
AlterHandler	Interface for Alter Table and Alter Partition code
IExtrapolatePartStatus
IHMSHandler	An interface wrapper for HMSHandler.
IMetaStoreIncompatibleChangeHandler	This interface defines an API which can be used to process incompatible changes to tables in the HiveAlterHandler
IMetaStoreMetadataTransformer	This interface provides a way for users to implement a custom metadata transformer for tables/partitions.
IMetaStoreSchemaInfo	Defines the method which must be implemented to be used using schema tool to support metastore schema upgrades.
MetaStoreThread	A thread that runs in the metastore, separate from the threads in the thrift service.
RawStore

Class Summary

Class	Description
AbstractHMSHandlerProxy
AcidEventListener	It handles cleanup of dropped partition/table/database in ACID related metastore tables
AggregateStatsCache
AggregateStatsCache.AggrColStats
AuthConstants
AuthFactory	This class helps in some aspects of authentication.
Batchable<I,R>	Base class to add the batch process for DirectSQL or RawStore queries.
DatabaseProduct	Database product inferred via JDBC.
Deadline	This class is used to monitor long running methods in a thread.
DefaultIncompatibleTableChangeHandler	Default incompatible table change handler.
DefaultPartitionExpressionProxy	Default implementation of PartitionExpressionProxy.
DefaultStorageSchemaReader	Default StorageSchemaReader.
ExceptionHandler	Provides a simplified way of handling complex exceptions instead of catching the targeted exceptions differently for some transformations of exceptions.
FileMetadataManager
HiveAlterHandler	Hive specific implementation of alter
HiveMetaStore	TODO:pc remove application logic to a separate interface.
HiveMetaStore.HiveMetastoreCli	HiveMetaStore specific CLI
HiveMetaStoreChecker	Verify that the information in the metastore matches what is on the filesystem.
HiveMetaStoreFsImpl
HMSHandler	Default handler for all Hive Metastore methods.
HMSHandlerContext	When one hms client connects in, we create a handler context for it.
HMSHandlerProxyFactory
HMSMetricsListener	Report metrics of metadata added, deleted by this Hive Metastore.
HmsThriftHttpServlet
JdoPropertyStore	Implementation of the property store delegating persistence to a (jdo) raw store.
LinearExtrapolatePartStatus
MaterializationsRebuildLockCleanerTask	Cleaner for the MaterializationsRebuildLockHandler.
MaterializationsRebuildLockHandler	This is a lock handler implementation for the materializations rebuild.
MetastoreDefaultTransformer
MetaStoreEndFunctionContext	Base class which provides context to implementations of MetaStoreEndFunctionListener
MetaStoreEndFunctionListener	This abstract class needs to be extended to provide implementation of actions that need to be performed when a function ends.
MetaStoreEventListener	This abstract class needs to be extended to provide implementation of actions that needs to be performed when a particular event occurs on a metastore.
MetaStoreEventListenerConstants	Keeps a list of reserved keys used by Hive listeners when updating the ListenerEvent parameters.
MetaStoreInit	MetaStoreInit defines functions to init/update MetaStore connection url.
MetaStoreInitContext	Base class which provides context to implementations of MetaStoreInitListener
MetaStoreInitListener	This abstract class needs to be extended to provide implementation of actions that needs to be performed when HMSHandler is initialized
MetaStoreListenerNotifier	This class is used to notify a list of listeners about specific MetaStore events.
MetaStorePreEventListener	This abstract class needs to be extended to provide implementation of actions that needs to be performed before a particular event occurs on a metastore.
MetaStoreSchemaInfo
MetaStoreSchemaInfoFactory	Factory class implementation to create instances of IMetaStoreSchemaInfo based on the provided configuration
Msck	Msck repairs table metadata specifically related to partition information to be in-sync with directories in table location.
MsckInfo	Metadata related to Msck.
MsckPartitionExpressionProxy
ObjectStore	This class is the interface between the application logic and the database store that contains the objects.
ObjectStoreTestHook
PartFilterExprUtil	Utility functions for working with partition filter expressions
PartitionIterable	PartitionIterable - effectively a lazy Iterable<Partition> Sometimes, we have a need for iterating through a list of partitions, but the list of partitions can be too big to fetch as a single object.
PartitionManagementTask	Partition management task is primarily responsible for partition retention and discovery based on table properties.
PartitionProjectionEvaluator	Evaluator for partition projection filters which specify parts of the partition that should be used using dot notation for fields.
PersistenceManagerProvider	This class is a wrapper class around PersistenceManagerFactory and its properties These objects are static and need to be carefully modified together such that there are no race-conditions when updating them.
PropertyServlet	The property-maps servlet.
QueryWrapper	A wrapper around Query objects where the AutoCloseable.close() method is delegated to the wrapped object's Query.closeAll() method.
RawStoreProxy
ReplicationMetricsMaintTask	Metastore task to remove old replication metrics.
RetryingHMSHandler
RuntimeStatsCleanerTask	Metastore task to handle RuntimeStat related expiration.
ScheduledQueryExecutionsMaintTask	Metastore task to remove old scheduled query executions.
ServletSecurity	Secures servlet processing.
SessionPropertiesListener	It handles the changed properties in the change event.
StatObjectConverter	This class contains conversion logic that creates Thrift stat objects from JDO stat objects and plain arrays from DirectSQL.
TableFields
ThreadPool	Utility singleton class to manage all the threads.
TransactionalMetaStoreEventListener	Special type of MetaStoreEventListener which should only be called in a transactional context and only if the transaction is successful.
TransactionalValidationListener
TServerSocketKeepAlive	TServerSocketKeepAlive - like TServerSocket, but will enable keepalive for accepted sockets.
TSetIpAddressProcessor<I extends ThriftHiveMetastore.Iface>	TSetIpAddressProcessor passes the IP address of the Thrift client to the HMSHandler.
TUGIBasedProcessor<I extends ThriftHiveMetastore.Iface>	TUGIBasedProcessor is used in unsecure mode for thrift metastore client server communication.

Enum Summary

Enum	Description
AuthConstants.AuthTypes
DatabaseProduct.DbType
IExtrapolatePartStatus.AggrType	The sequence of aggregation function on colStats.
IExtrapolatePartStatus.ColStatType	The sequence of colStatTypes.

Exception Summary

Exception	Description
DeadlineException	Thrown when a long running method timeout is checked.

Annotation Types Summary

Annotation Type	Description
RawStore.CanNotRetry	Annotation to skip retries