Package org.apache.drill.exec.store

Interface Summary

Interface	Description
ColumnExplorer.ImplicitFileColumn
ConnectorLocator	Locates storage plugins.
PartitionExplorer	Exposes partition information to UDFs to allow queries to limit reading partitions dynamically.
PluginBootstrapLoader	Generalized interface for bootstraping or upgrading the plugin persistent store.
PluginRegistryContext	Provides a loose coupling of the plugin registry to the resources it needs from elsewhere.
PluginRulesProvider	Provides rules required for adding support of specific operator pushdown for storage plugin.
RecordReader
RecordWriter	RecordWriter interface.
SchemaConfig.SchemaConfigInfoProvider	Interface to implement to provide required info for SchemaConfig
SchemaFactory	Storage plugins implements this interface to register the schemas they provide.
SchemaPartitionExplorer	Exposes partition information for a particular schema.
StatisticsRecordCollector	Interface for collecting and obtaining statistics.
StatisticsRecordWriter
StoragePlugin	Interface for all implementations of the storage plugins.
StoragePluginRegistry
StoragePluginStore	Interface to the storage mechanism used to store storage plugin configurations, typically in JSON format.

Class Summary

Class	Description
AbstractRecordReader
AbstractRecordWriter
AbstractSchema
AbstractSchemaFactory	Abstract implementation of SchemaFactory, ensures that given schema name is always converted is lower case.
AbstractStoragePlugin	Abstract class for StorePlugin implementations.
ClassicConnectorLocator	Plugin locator for the "classic" class-path method of locating connectors.
ClassPathFileSystem
ColumnExplorer
CommonParquetRecordReader
ConnectorHandle	Defines a storage connector: a storage plugin config along with the locator which can create a plugin instance given an instance of the config.
DrillbitPluginRegistryContext	Implementation of the storage registry context which obtains the needed resources from the DrillbitContext.
DrillSchemaFactory
EventBasedRecordWriter	Reads records from the RecordValueAccessor and writes into RecordWriter.
EventBasedRecordWriter.FieldConverter
ImplicitColumnUtils
ImplicitColumnUtils.ImplicitColumn
ImplicitColumnUtils.ImplicitColumns	This class represents an implicit column in a dataset.
JSONBaseStatisticsRecordWriter	Abstract implementation of StatisticsRecordWriter interface which exposes interface: #writeHeader(List) #addField(int,String) to output the data in string format instead of implementing addField for each type holder.
JSONOutputRecordWriter	Abstract implementation of RecordWriter interface which exposes interface: #writeHeader(List) #addField(int,String) to output the data in string format instead of implementing addField for each type holder.
LocalSyncableFileSystem	A syncable local extension of the Hadoop FileSystem
ParquetOutputRecordWriter	Abstract implementation of RecordWriter interface which exposes interface: #writeHeader(List) #addField(int,String) to output the data in string format instead of implementing addField for each type holder.
PartitionExplorerImpl
PluginBootstrapLoaderImpl	Loads the set of bootstrap plugin configurations for new systems.
PluginHandle	Represents a storage plugin, defined by a (name, config) pair.
PluginRulesProviderImpl
RecordDataType	Defines names and data types of columns in a static drill table.
ResourceInputStream
SchemaConfig	Contains information needed by AbstractSchema implementations.
SchemaConfig.Builder
SchemaTreeProvider	Creates new schema trees.
StatisticsRecordWriterImpl	Reads records from the RecordValueAccessor and writes into StatisticsRecordCollector.
StoragePluginOptimizerRule
StoragePluginRegistryImpl	Plugin registry.
StoragePluginRulesSupplier	Helper class that can be used to obtain rules required for pushing down operators that specific plugin supports configured using StoragePluginRulesSupplier.StoragePluginRulesSupplierBuilder.
StoragePluginRulesSupplier.StoragePluginRulesSupplierBuilder
StoragePluginStoreImpl	Concrete storage plugin (configuration) store based on the PersistentStore abstraction.
StorageStrategy	Contains list of parameters that will be used to store path / files on file system.
StringOutputRecordWriter	Abstract implementation of RecordWriter interface which exposes interface: StringOutputRecordWriter.startNewSchema(BatchSchema) StringOutputRecordWriter.addField(int,String) to output the data in string format instead of implementing addField for each type holder.
SubSchemaWrapper
SubsetRemover	Removes RelSubset nodes from the plan.
SystemPluginLocator	Locates system storage plugins.
TimedCallable<V>	Allows parallel executions of tasks in a simplified way.

Enum Summary

Enum	Description
ColumnExplorer.ImplicitFileColumns	Columns that give information from where file data comes from.
ColumnExplorer.ImplicitInternalFileColumns	Columns that give internal information about file or its parts.
CommonParquetRecordReader.Metric
StoragePluginRegistry.PluginFilter

Exception Summary

Exception	Description
PartitionNotFoundException
StoragePluginRegistry.PluginEncodingException	Indicates an error when decoding a plugin from JSON.
StoragePluginRegistry.PluginException
StoragePluginRegistry.PluginNotFoundException	Indicates the requested plugin was not found.

Annotation Types Summary

Annotation Type	Description
PrivatePlugin	Indicates private plugins which will be excluded from automatic plugin discovery.
SystemPlugin	Indicates system plugins which will be dynamically initialized during storage plugin registry init stage.