Connection接口用于建立JDBC客户端到数据库的连接，通过DriverManager.getConnection(url, user, password) 方法获取。

YashanDB JDBC驱动对connection接口已支持功能（单机部署/共享集群/分布式集群部署）：

返回类型	方法	备注
Statement	createStatement()	-
Clob	createClob()	-
Blob	createBlob()	-
Statement	createStatement(int resultSetType, int resultSetConcurrency)	-
Statement	createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)	-
PreparedStatement	prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)	-
PreparedStatement	prepareStatement(String sql)	-
PreparedStatement	prepareStatement(String sql, int resultSetType,int resultSetConcurrency)	-
PreparedStatement	prepareStatement(String sql, int autoGeneratedKeys)	-
PreparedStatement	PreparedStatement prepareStatement(String sql, int columnIndexes[])	-
PreparedStatement	PreparedStatement prepareStatement(String sql, String columnNames[])	-
Properties	getClientInfo()	-
CallableStatement	prepareCall(String sql)	-
void	setAutoCommit(boolean autoCommit)	-
boolean	getAutoCommit()	-
void	commit()	-
void	rollback()	-
void	close()	-
void	setClientInfo(String name, String value)
void	setClientInfo(Properties properties)
String	getClientInfo(String name)
boolean	isClosed()	-
DatabaseMetaData	getMetaData()	-
boolean	isReadOnly()	-
void	setTransactionIsolation(int level)	支持以下三个值： Connection.TRANSACTION_READ_COMMITTED = 2 Connection.TRANSACTION_SERIALIZABLE = 8 YasConnection.TRANSACTION_READ_CURRENT_COMMITTED = 3
int	getTransactionIsolation()	-
java.util.Map<String,Class<?>>	getTypeMap()	-
void	setTypeMap(java.util.Map<String,Class<?>> map)	-
int	getHoldability()	-
Savepoint	setSavepoint()	-
Savepoint	setSavepoint(String name)	-
Struct	createStruct(String typeName, Object[] attributes)	-
void	rollback(Savepoint savepoint)	-
boolean	isValid(int timeout)	-
void	setSchema(String schema)	-
String	getSchema()	-
Struct	createStruct(String typeName, Object[] attributes)	-
void	abort(Executor executor)	-
void	setNetworkTimeout(Executor executor, int milliseconds)	-
int	getNetworkTimeout()	-
CallableStatement	prepareCall(String sql, int resultSetType, int resultSetConcurrency)	-
CallableStatement	prepareCall(String sql, int resultSetType, int resultSetConcurrency,int resultSetHoldability)	-
SQLXML	createSQLXML()	-
void	releaseSavepoint(Savepoint savepoint)	-

YashanDB JDBC驱动对connection接口已支持功能（存算一体分布式集群部署）：

返回类型	方法	备注
Statement	createStatement()	-
Statement	createStatement(int resultSetType, int resultSetConcurrency)	-
Statement	createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)	-
PreparedStatement	prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability)	-
CallableStatement	prepareCall(String sql)	-
CallableStatement	prepareCall(String sql, int resultSetType, int resultSetConcurrency)	-
CallableStatement	prepareCall(String sql, int resultSetType, int resultSetConcurrency,int resultSetHoldability)	-
PreparedStatement	prepareStatement(String sql, int resultSetType,int resultSetConcurrency)	-
PreparedStatement	prepareStatement(String sql)	-
Properties	getClientInfo()	-
void	setAutoCommit(boolean autoCommit)	-
boolean	getAutoCommit()	-
void	commit()	-
void	rollback()	-
void	close()	-
void	setClientInfo(String name, String value)	-
void	setClientInfo(Properties properties)	-
String	getClientInfo(String name)	-
boolean	isClosed()	-
DatabaseMetaData	getMetaData()	-
boolean	isReadOnly()	-
java.util.Map<String,Class<?>>	getTypeMap()	-
void	setTypeMap(java.util.Map<String,Class<?>> map)	-
int	getHoldability()	-
boolean	isValid(int timeout)	-
void	setSchema(String schema)	-
String	getSchema()	-
void	abort(Executor executor)	-
void	setNetworkTimeout(Executor executor, int milliseconds)	-
int	getNetworkTimeout()	-
Clob	createClob()	-
Blob	createBlob()	-
Savepoint	setSavepoint()	-
Savepoint	setSavepoint(String name)	-
Struct	createStruct(String typeName, Object[] attributes)	-
void	rollback(Savepoint savepoint)	-
SQLXML	createSQLXML()	-
void	setHoldability(int holdability)	-
void	setTransactionIsolation(int level)	只支持一个取值：Connection.TRANSACTION_READ_COMMITTED = 2
int	getTransactionIsolation()	-
void	releaseSavepoint(Savepoint savepoint)	-

未支持功能（单机部署/共享集群/分布式集群部署）：

返回类型	方法
String	nativeSQL(String sql)
void	setReadOnly(boolean readOnly)
SQLWarning	getWarnings()
void	clearWarnings()
void	setHoldability(int holdability)
NClob	createNClob()
Array	createArrayOf(String typeName, Object[] elements)
void	setCatalog(String catalog)
String	getCatalog()

未支持功能（存算一体分布式集群部署）：

返回类型	方法
void	setReadOnly(boolean readOnly)
String	nativeSQL(String sql)
SQLWarning	getWarnings()
void	clearWarnings()
PreparedStatement	prepareStatement(String sql, int autoGeneratedKeys)
PreparedStatement	prepareStatement(String sql, int columnIndexes[])
PreparedStatement	prepareStatement(String sql, String columnNames[])
NClob	createNClob()
Array	createArrayOf(String typeName, Object[] elements)
void	setCatalog(String catalog)
String	getCatalog()

YashanDB JDBC驱动YasConnection扩展接口功能：

返回类型	方法	说明
void	setClientPrepare(boolean clientPrepare)	表示对于绑定参数执行场景，是否开启直接执行；默认不开启，JDBC客户端会先向服务端发送prepare命令然后发送绑定参数执行；若开启，则会将prepareStatement的SQL语句和要绑定的参数一次性发给服务端，减少交互次数。 示例： Connection conn = getConnection("sales", "sales"); ((YasConnection)conn).setClientPrepare(true);
void	registerTAFCallback(YasFailover yasFailover, Object ctxt)	注册TAF回调函数的实现类，如果注册了回调函数，failoverRetries和failoverDelay参数不生效，TAF链接失败时不会尝试进行重连。详细见TAF相关接口
Array	createArray(String typeName, Object[] elements)	根据Array的Name创建Array对象，用来替代createArrayOf接口
boolean	getClientPrepare();	是否开启直接执行。
int	getDefaultFetchSize()	-
void	setDefaultFetchSize(int fetchSize)	-
string	getSessionTimeZoneOffset()	获取当前连接的时区偏移量。
void	setSessionTimeZoneOffset(String timeZone)	设置当前连接的时区偏移量。