org.apache.drill.exec.store.ischema

Class InfoSchemaStoragePlugin

java.lang.Object

org.apache.drill.exec.store.AbstractStoragePlugin

org.apache.drill.exec.store.ischema.InfoSchemaStoragePlugin

All Implemented Interfaces:

AutoCloseable, SchemaFactory, StoragePlugin

public class InfoSchemaStoragePlugin
extends AbstractStoragePlugin

Constructor Summary

Constructors

Constructor and Description
InfoSchemaStoragePlugin(InfoSchemaConfig config, DrillbitContext context, String name)

Method Summary

Methods

Modifier and Type	Method and Description
StoragePluginConfig	getConfig() Method returns a Jackson serializable object that extends a StoragePluginConfig
Set<StoragePluginOptimizerRule>	getPhysicalOptimizerRules(OptimizerRulesContext optimizerRulesContext)
InfoSchemaGroupScan	getPhysicalScan(String userName, JSONOptions selection, List<SchemaPath> columns) Get the physical scan operator for the particular GroupScan (read) node.
void	registerSchemas(SchemaConfig schemaConfig, org.apache.calcite.schema.SchemaPlus parent) Register the schemas provided by this SchemaFactory implementation under the given parent schema.
boolean	supportsRead() Indicates if Drill can read the table from this format.

Methods inherited from class org.apache.drill.exec.store.AbstractStoragePlugin

close, getLogicalOptimizerRules, getOptimizerRules, getOptimizerRules, getPhysicalScan, start, supportsWrite

Methods inherited from class java.lang.Object

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

Constructor Detail

InfoSchemaStoragePlugin

public InfoSchemaStoragePlugin(InfoSchemaConfig config,
                       DrillbitContext context,
                       String name)

Method Detail

supportsRead

public boolean supportsRead()

Description copied from interface: StoragePlugin

Indicates if Drill can read the table from this format.

Specified by:

supportsRead in interface StoragePlugin

Overrides:

supportsRead in class AbstractStoragePlugin

getPhysicalScan

public InfoSchemaGroupScan getPhysicalScan(String userName,
                                  JSONOptions selection,
                                  List<SchemaPath> columns)
                                    throws IOException

Description copied from interface: StoragePlugin

Get the physical scan operator for the particular GroupScan (read) node.

Specified by:

getPhysicalScan in interface StoragePlugin

Overrides:

getPhysicalScan in class AbstractStoragePlugin

Parameters:

userName - User whom to impersonate when when reading the contents as part of Scan.

selection - The configured storage engine specific selection.

columns - (optional) The list of column names to scan from the data source.

Returns:

Throws:

IOException

getConfig

public StoragePluginConfig getConfig()

Description copied from interface: StoragePlugin

Method returns a Jackson serializable object that extends a StoragePluginConfig

Returns:

an extension of StoragePluginConfig

registerSchemas

public void registerSchemas(SchemaConfig schemaConfig,
                   org.apache.calcite.schema.SchemaPlus parent)
                     throws IOException

Description copied from interface: SchemaFactory

Register the schemas provided by this SchemaFactory implementation under the given parent schema.

Parameters:

schemaConfig - Configuration for schema objects.

parent - Reference to parent schema.

Throws:

IOException

getPhysicalOptimizerRules

public Set<StoragePluginOptimizerRule> getPhysicalOptimizerRules(OptimizerRulesContext optimizerRulesContext)

Overrides:

getPhysicalOptimizerRules in class AbstractStoragePlugin