org.verdictdb.connection

Class CachedDbmsConnection

java.lang.Object

org.verdictdb.connection.CachedMetaDataProvider

org.verdictdb.connection.CachedDbmsConnection

All Implemented Interfaces:

DbmsConnection, MetaDataProvider

public class CachedDbmsConnection
extends CachedMetaDataProvider
implements DbmsConnection

Offers the same functionality as DbmsConnection; however, returns cached metadata whenever possible to speed up query processing.

Author:

Yongjoo Park

Constructor Summary

Constructors

Constructor and Description
CachedDbmsConnection(DbmsConnection conn)

Method Summary

Modifier and Type	Method and Description
void	close()
DbmsConnection	copy()
DbmsQueryResult	execute(String query) Executes a query (or queries).
DbmsConnection	getOriginalConnection()
SqlSyntax	getSyntax()

Methods inherited from class org.verdictdb.connection.CachedMetaDataProvider

getColumns, getDefaultSchema, getPartitionColumns, getSchemas, getTables, setDefaultSchema

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.verdictdb.connection.MetaDataProvider

getColumns, getDefaultSchema, getPartitionColumns, getSchemas, getTables, setDefaultSchema

Constructor Detail

CachedDbmsConnection

public CachedDbmsConnection(DbmsConnection conn)

Method Detail

execute

public DbmsQueryResult execute(String query)
                        throws VerdictDBDbmsException

Description copied from interface: DbmsConnection

Executes a query (or queries). If the result exists, return it.

If a query includes multiple queries separated by semicolons, issue them separately in order.

Specified by:

execute in interface DbmsConnection

Returns:

Throws:

VerdictDBDbmsException

getSyntax

public SqlSyntax getSyntax()

Specified by:

getSyntax in interface DbmsConnection

close

public void close()

Specified by:

close in interface DbmsConnection

getOriginalConnection

public DbmsConnection getOriginalConnection()

copy

public DbmsConnection copy()

Specified by:

copy in interface DbmsConnection