com.taosdata.jdbc

Class TSDBJNIConnector

java.lang.Object

com.taosdata.jdbc.TSDBJNIConnector

public class TSDBJNIConnector
extends Object

Constructor Summary

Constructors

Constructor and Description
TSDBJNIConnector()

Method Summary

Modifier and Type	Method and Description
void	closeConnection() Execute close operation from C to release connection pointer by JNI
boolean	connect(String host, int port, String dbName, String user, String password) Get connection pointer
TSDBResultSetRowData	consume(long subscription) Consume a subscribed table
int	executeQuery(String sql) Execute DML/DDL operation
int	fetchRow(long resultSet, TSDBResultSetRowData rowData) Get one row data
int	freeResultSet() Close the open result set which is associated to the current connection.
int	freeResultSet(long result) Free resultset operation from C to release resultset pointer by JNI
int	getAffectedRows() Get affected rows count
int	getErrCode() Get recent error code by connection
String	getErrMsg() Get recent error message by connection
long	getResultSet() Get resultset pointer Each connection should have a single open result set at a time
int	getSchemaMetaData(long resultSet, List<ColumnMetaData> columnMetaData) Get schema metadata
static String	getTsCharset()
static void	init(String configDir, String locale, String charset, String timezone) Initialize static variables in JNI to optimize performance
static void	initImp(String configDir)
boolean	isClosed() Whether the connection is closed
boolean	isResultsetClosed() Returns the status of last result set in current connection
static int	setOptions(int optionIndex, String optionValue)
long	subscribe(String host, String user, String password, String database, String table, long time, int period) Subscribe to a table in TSDB
void	unsubscribe(long subscription) Unsubscribe a table
boolean	validateCreateTableSql(String sql) Validate if a create table sql statement is correct without actually creating that table

Methods inherited from class java.lang.Object

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

Constructor Detail

TSDBJNIConnector

public TSDBJNIConnector()

Method Detail

isClosed

public boolean isClosed()

Whether the connection is closed

isResultsetClosed

public boolean isResultsetClosed()

Returns the status of last result set in current connection

Returns:

init

public static void init(String configDir,
                        String locale,
                        String charset,
                        String timezone)
                 throws SQLWarning

Initialize static variables in JNI to optimize performance

Throws:

SQLWarning

initImp

public static void initImp(String configDir)

setOptions

public static int setOptions(int optionIndex,
                             String optionValue)

getTsCharset

public static String getTsCharset()

connect

public boolean connect(String host,
                       int port,
                       String dbName,
                       String user,
                       String password)
                throws SQLException

Get connection pointer

Throws:

SQLException

executeQuery

public int executeQuery(String sql)
                 throws SQLException

Execute DML/DDL operation

Throws:

SQLException

getErrCode

public int getErrCode()

Get recent error code by connection

getErrMsg

public String getErrMsg()

Get recent error message by connection

getResultSet

public long getResultSet()

Get resultset pointer Each connection should have a single open result set at a time

freeResultSet

public int freeResultSet(long result)

Free resultset operation from C to release resultset pointer by JNI

freeResultSet

public int freeResultSet()

Close the open result set which is associated to the current connection. If the result set is already closed, return 0 for success.

Returns:

getAffectedRows

public int getAffectedRows()

Get affected rows count

getSchemaMetaData

public int getSchemaMetaData(long resultSet,
                             List<ColumnMetaData> columnMetaData)

Get schema metadata

fetchRow

public int fetchRow(long resultSet,
                    TSDBResultSetRowData rowData)

Get one row data

closeConnection

public void closeConnection()
                     throws SQLException

Execute close operation from C to release connection pointer by JNI

Throws:

SQLException

subscribe

public long subscribe(String host,
                      String user,
                      String password,
                      String database,
                      String table,
                      long time,
                      int period)

Subscribe to a table in TSDB

consume

public TSDBResultSetRowData consume(long subscription)

Consume a subscribed table

unsubscribe

public void unsubscribe(long subscription)

Unsubscribe a table

Parameters:

subscription -

validateCreateTableSql

public boolean validateCreateTableSql(String sql)

Validate if a create table sql statement is correct without actually creating that table