Package io.trino.plugin.accumulo

Class AccumuloClient

java.lang.Object

io.trino.plugin.accumulo.AccumuloClient

public class AccumuloClient
extends Object

This class is the main access point for the Trino connector to interact with Accumulo. It is responsible for creating tables, dropping tables, retrieving table metadata, and getting the ConnectorSplits from a table.

Constructor Summary

Constructors

Constructor	Description
AccumuloClient(org.apache.accumulo.core.client.Connector connector, AccumuloConfig config, ZooKeeperMetadataManager metaManager, AccumuloTableManager tableManager, IndexLookup indexLookup)

Method Summary

Modifier and Type	Method	Description
void	createOrReplaceView(SchemaTableName viewName, String viewData)
void	createSchema(String schemaName)
AccumuloTable	createTable(ConnectorTableMetadata meta)
void	createView(SchemaTableName viewName, String viewData)
void	dropSchema(String schemaName)
void	dropTable(AccumuloTable table)
void	dropView(SchemaTableName viewName)
static Collection<org.apache.accumulo.core.data.Range>	getRangesFromDomain(Optional<Domain> domain, AccumuloRowSerializer serializer)	Gets a collection of Accumulo Range objects from the given Trino domain.
Set<String>	getSchemaNames()
AccumuloTable	getTable(SchemaTableName table)
Set<String>	getTableNames(String schema)
List<TabletSplitMetadata>	getTabletSplits(ConnectorSession session, String schema, String table, Optional<Domain> rowIdDomain, List<AccumuloColumnConstraint> constraints, AccumuloRowSerializer serializer)	Fetches the TabletSplitMetadata for a query against an Accumulo table.
AccumuloView	getView(SchemaTableName viewName)
Set<String>	getViewNames(String schema)
void	renameColumn(AccumuloTable table, String source, String target)
void	renameTable(SchemaTableName oldName, SchemaTableName newName)

Methods inherited from class java.lang.Object

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

Constructor Details

AccumuloClient

@Inject
public AccumuloClient(org.apache.accumulo.core.client.Connector connector,
 AccumuloConfig config,
 ZooKeeperMetadataManager metaManager,
 AccumuloTableManager tableManager,
 IndexLookup indexLookup)
               throws org.apache.accumulo.core.client.AccumuloException,
org.apache.accumulo.core.client.AccumuloSecurityException

Throws:

org.apache.accumulo.core.client.AccumuloException

org.apache.accumulo.core.client.AccumuloSecurityException

Method Details

createSchema

public void createSchema(String schemaName)

dropSchema

public void dropSchema(String schemaName)

createTable

public AccumuloTable createTable(ConnectorTableMetadata meta)

dropTable

public void dropTable(AccumuloTable table)

renameTable

public void renameTable(SchemaTableName oldName,
 SchemaTableName newName)

createView

public void createView(SchemaTableName viewName,
 String viewData)

createOrReplaceView

public void createOrReplaceView(SchemaTableName viewName,
 String viewData)

dropView

public void dropView(SchemaTableName viewName)

renameColumn

public void renameColumn(AccumuloTable table,
 String source,
 String target)

getSchemaNames

public Set<String> getSchemaNames()

getTableNames

public Set<String> getTableNames(String schema)

getTable

public AccumuloTable getTable(SchemaTableName table)

getViewNames

public Set<String> getViewNames(String schema)

getView

public AccumuloView getView(SchemaTableName viewName)

getTabletSplits

public List<TabletSplitMetadata> getTabletSplits(ConnectorSession session,
 String schema,
 String table,
 Optional<Domain> rowIdDomain,
 List<AccumuloColumnConstraint> constraints,
 AccumuloRowSerializer serializer)

Fetches the TabletSplitMetadata for a query against an Accumulo table.

Does a whole bunch of fun stuff! Splitting on row ID ranges, applying secondary indexes, column pruning, all sorts of sweet optimizations. What you have here is an important method.

Parameters:

session - Current session

schema - Schema name

table - Table Name

rowIdDomain - Domain for the row ID

constraints - Column constraints for the query

serializer - Instance of a row serializer

Returns:

List of TabletSplitMetadata objects for Trino

getRangesFromDomain

public static Collection<org.apache.accumulo.core.data.Range> getRangesFromDomain(Optional<Domain> domain,
 AccumuloRowSerializer serializer)
                                                                           throws TableNotFoundException

Gets a collection of Accumulo Range objects from the given Trino domain. This maps the column constraints of the given Domain to an Accumulo Range scan.

Parameters:

domain - Domain, can be null (returns (-inf, +inf) Range)

serializer - Instance of an AccumuloRowSerializer

Returns:

A collection of Accumulo Range objects

Throws:

TableNotFoundException - If the Accumulo table is not found