Package org.apache.druid.metadata.storage.derby

Class DerbyConnector

java.lang.Object

org.apache.druid.metadata.SQLMetadataConnector

org.apache.druid.metadata.storage.derby.DerbyConnector

All Implemented Interfaces:

org.apache.druid.metadata.MetadataStorageConnector

public class DerbyConnector
extends SQLMetadataConnector

Field Summary

Fields inherited from interface org.apache.druid.metadata.MetadataStorageConnector

CONFIG_TABLE_KEY_COLUMN, CONFIG_TABLE_VALUE_COLUMN

Constructor Summary

Constructors

Constructor	Description
DerbyConnector(MetadataStorage storage, com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageConnectorConfig> config, com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageTablesConfig> dbTables)
DerbyConnector(MetadataStorage storage, com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageConnectorConfig> config, com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageTablesConfig> dbTables, org.skife.jdbi.v2.DBI dbi)

Method Summary

Modifier and Type	Method	Description
void	exportTable(String tableName, String outputPath)
org.skife.jdbi.v2.DBI	getDBI()
ResultSet	getIndexInfo(DatabaseMetaData databaseMetaData, String tableName)	Get the ResultSet for indexInfo for given table
String	getQuoteString()
String	getSerialType()	Auto-incrementing integer SQL type to use for IDs.
int	getStreamingFetchSize()	Returns the value that should be passed to statement.setFetchSize to ensure results are streamed back from the database instead of fetching the entire result set in memory.
String	getValidationQuery()
String	limitClause(int limit)
void	start()
void	stop()
boolean	tableExists(org.skife.jdbi.v2.Handle handle, String tableName)
boolean	tableHasColumn(String tableName, String columnName)	Interrogate table metadata and return true or false depending on the existance of the indicated column public visibility because DerbyConnector needs to override thanks to uppercase table and column names.

Methods inherited from class org.apache.druid.metadata.SQLMetadataConnector

alterSegmentTableAddUsedFlagLastUpdated, compareAndSwap, connectorIsTransientException, createAuditTable, createConfigTable, createConfigTable, createDataSourceTable, createDataSourceTable, createEntryTable, createIndex, createLockTable, createLogTable, createPendingSegmentsTable, createPendingSegmentsTable, createRulesTable, createRulesTable, createSegmentTable, createSegmentTable, createSupervisorsTable, createSupervisorsTable, createTable, createTaskTables, createUpgradeSegmentsTable, deleteAllRecords, getCollation, getConfig, getDatasource, getIndexOnTable, getPayloadType, inReadOnlyTransaction, insertOrUpdate, isRootCausePacketTooBigException, isTransientException, lookup, lookupWithHandle, makeDatasource, prepareTaskEntryTable, retryTransaction, retryWithHandle, retryWithHandle

Methods inherited from class java.lang.Object

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

Constructor Detail

DerbyConnector

@Inject
public DerbyConnector(MetadataStorage storage,
                      com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageConnectorConfig> config,
                      com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageTablesConfig> dbTables)

DerbyConnector

public DerbyConnector(MetadataStorage storage,
                      com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageConnectorConfig> config,
                      com.google.common.base.Supplier<org.apache.druid.metadata.MetadataStorageTablesConfig> dbTables,
                      org.skife.jdbi.v2.DBI dbi)

Method Detail

tableExists

public boolean tableExists(org.skife.jdbi.v2.Handle handle,
                           String tableName)

Specified by:

tableExists in class SQLMetadataConnector

getSerialType

public String getSerialType()

Description copied from class: SQLMetadataConnector

Auto-incrementing integer SQL type to use for IDs. The returned string is interpolated into the table creation statement as follows:

 CREATE TABLE druid_table (
   id <serial-type> NOT NULL,
   col_2 VARCHAR(255) NOT NULL,
   col_3 VARCHAR(255) NOT NULL
   ...
 )
 

Specified by:

getSerialType in class SQLMetadataConnector

Returns:

String representing auto-incrementing SQL integer type to use for IDs.

getQuoteString

public String getQuoteString()

Specified by:

getQuoteString in class SQLMetadataConnector

Returns:

the string that should be used to quote string fields

getDBI

public org.skife.jdbi.v2.DBI getDBI()

Specified by:

getDBI in class SQLMetadataConnector

getStreamingFetchSize

public int getStreamingFetchSize()

Description copied from class: SQLMetadataConnector

Returns the value that should be passed to statement.setFetchSize to ensure results are streamed back from the database instead of fetching the entire result set in memory.

Specified by:

getStreamingFetchSize in class SQLMetadataConnector

Returns:

optimal fetch size to stream results back

getValidationQuery

public String getValidationQuery()

Overrides:

getValidationQuery in class SQLMetadataConnector

limitClause

public String limitClause(int limit)

Specified by:

limitClause in class SQLMetadataConnector

exportTable

public void exportTable(String tableName,
                        String outputPath)

getIndexInfo

public ResultSet getIndexInfo(DatabaseMetaData databaseMetaData,
                              String tableName)
                       throws SQLException

Get the ResultSet for indexInfo for given table

Overrides:

getIndexInfo in class SQLMetadataConnector

Parameters:

databaseMetaData - DatabaseMetaData

tableName - Name of table

Returns:

ResultSet with index info

Throws:

SQLException

tableHasColumn

public boolean tableHasColumn(String tableName,
                              String columnName)

Interrogate table metadata and return true or false depending on the existance of the indicated column public visibility because DerbyConnector needs to override thanks to uppercase table and column names.

Overrides:

tableHasColumn in class SQLMetadataConnector

Parameters:

tableName - The table being interrogated

columnName - The column being looked for

Returns:

boolean indicating the existence of the column in question

start

public void start()

stop

public void stop()