com.taosdata.jdbc

类 TSDBJNIConnector

java.lang.Object

com.taosdata.jdbc.TSDBJNIConnector

public class TSDBJNIConnector
extends Object

构造器概要

构造器

构造器和说明
TSDBJNIConnector()

方法概要

限定符和类型	方法和说明
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
long	executeQuery(String sql) Execute DML/DDL operation
int	fetchBlock(long resultSet, TSDBResultSetBlockData blockData)
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(long pSql) Get affected rows count
int	getErrCode(long pSql) Get recent error code by connection
String	getErrMsg(long pSql) 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
boolean	isUpdateQuery(long pSql)
static int	setOptions(int optionIndex, String optionValue)
boolean	validateCreateTableSql(String sql) Validate if a create table sql statement is correct without actually creating that table

从类继承的方法 java.lang.Object

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

构造器详细资料

TSDBJNIConnector

public TSDBJNIConnector()

方法详细资料

isClosed

public boolean isClosed()

Whether the connection is closed

isResultsetClosed

public boolean isResultsetClosed()

Returns the status of last result set in current connection

init

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

Initialize static variables in JNI to optimize performance

抛出:

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

抛出:

SQLException

executeQuery

public long executeQuery(String sql)
                  throws SQLException

Execute DML/DDL operation

抛出:

SQLException

getErrCode

public int getErrCode(long pSql)

Get recent error code by connection

getErrMsg

public String getErrMsg(long pSql)

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

isUpdateQuery

public boolean isUpdateQuery(long pSql)

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.

getAffectedRows

public int getAffectedRows(long pSql)

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

fetchBlock

public int fetchBlock(long resultSet,
                      TSDBResultSetBlockData blockData)

closeConnection

public void closeConnection()
                     throws SQLException

Execute close operation from C to release connection pointer by JNI

抛出:

SQLException

validateCreateTableSql

public boolean validateCreateTableSql(String sql)

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