change

src/connector/jdbc/src/main/java/com/taosdata/jdbc/AbstractConnection.java

+package com.taosdata.jdbc;
+
+import java.sql.*;
+import java.util.Enumeration;
+import java.util.Map;
+import java.util.Properties;
+import java.util.concurrent.Executor;
+
+public abstract class AbstractConnection extends WrapperImpl implements Connection {
+
+    protected volatile boolean isClosed;
+    protected volatile String catalog;
+    protected volatile Properties clientInfoProps = new Properties();
+
+    @Override
+    public abstract Statement createStatement() throws SQLException;
+
+    @Override
+    public abstract PreparedStatement prepareStatement(String sql) throws SQLException;
+
+    @Override
+    public CallableStatement prepareCall(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public String nativeSQL(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        // do nothing
+        return sql;
+    }
+
+    @Override
+    public void setAutoCommit(boolean autoCommit) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        //do nothing
+    }
+
+    @Override
+    public boolean getAutoCommit() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return true;
+    }
+
+    @Override
+    public void commit() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        // do nothing
+    }
+
+    @Override
+    public void rollback() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        // do nothing
+    }
+
+    @Override
+    public abstract void close() throws SQLException;
+
+    @Override
+    public abstract boolean isClosed() throws SQLException;
+
+    @Override
+    public abstract DatabaseMetaData getMetaData() throws SQLException;
+
+    @Override
+    public void setReadOnly(boolean readOnly) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        //do nothing
+    }
+
+    @Override
+    public boolean isReadOnly() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        return true;
+    }
+
+    @Override
+    public void setCatalog(String catalog) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        this.catalog = catalog;
+    }
+
+    @Override
+    public String getCatalog() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return this.catalog;
+    }
+
+    @Override
+    public void setTransactionIsolation(int level) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        //do nothing
+    }
+
+    @Override
+    public int getTransactionIsolation() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return Connection.TRANSACTION_NONE;
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return null;
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        // do nothing
+    }
+
+    @Override
+    public abstract Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException;
+
+    @Override
+    public abstract PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency) throws SQLException;
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public Map<String, Class<?>> getTypeMap() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public void setHoldability(int holdability) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        //do nothing
+    }
+
+    @Override
+    public int getHoldability() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return ResultSet.HOLD_CURSORS_OVER_COMMIT;
+    }
+
+    @Override
+    public Savepoint setSavepoint() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public Savepoint setSavepoint(String name) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public void rollback(Savepoint savepoint) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public abstract Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException;
+
+    @Override
+    public abstract PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException;
+
+    @Override
+    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        switch (autoGeneratedKeys) {
+            case Statement.RETURN_GENERATED_KEYS:
+                throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+            case Statement.NO_GENERATED_KEYS:
+                break;
+        }
+
+        return prepareStatement(sql, ResultSet.TYPE_FORWARD_ONLY, ResultSet.CONCUR_READ_ONLY);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public Clob createClob() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public Blob createBlob() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public NClob createNClob() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public SQLXML createSQLXML() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public abstract boolean isValid(int timeout) throws SQLException;
+
+    @Override
+    public void setClientInfo(String name, String value) throws SQLClientInfoException {
+        if (isClosed)
+            throw TSDBError.createSQLClientInfoException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        if (clientInfoProps == null)
+            clientInfoProps = new Properties();
+        clientInfoProps.setProperty(name, value);
+    }
+
+    @Override
+    public void setClientInfo(Properties properties) throws SQLClientInfoException {
+        if (isClosed)
+            throw TSDBError.createSQLClientInfoException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        for (Enumeration<Object> enumer = properties.keys(); enumer.hasMoreElements(); ) {
+            String name = (String) enumer.nextElement();
+            clientInfoProps.put(name, properties.getProperty(name));
+        }
+    }
+
+    @Override
+    public String getClientInfo(String name) throws SQLException {
+        if (isClosed)
+            throw TSDBError.createSQLClientInfoException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return clientInfoProps.getProperty(name);
+    }
+
+    @Override
+    public Properties getClientInfo() throws SQLException {
+        if (isClosed)
+            throw TSDBError.createSQLClientInfoException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return clientInfoProps;
+    }
+
+    @Override
+    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public void setSchema(String schema) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        //do nothing
+    }
+
+    @Override
+    public String getSchema() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        return null;
+    }
+
+    @Override
+    public void abort(Executor executor) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        // do nothing
+    }
+
+    @Override
+    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+        if (milliseconds < 0)
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public int getNetworkTimeout() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/AbstractDatabaseMetaData.java

@@ -1067,6 +1067,7 @@ public abstract class AbstractDatabaseMetaData implements DatabaseMetaData, Wrap
     }
 
     public ResultSet getClientInfoProperties() throws SQLException {
+        //TODO: see https://docs.oracle.com/javase/8/docs/api/java/sql/Connection.html#setClientInfo-java.lang.String-java.lang.String-
         return getEmptyResultSet();
     }
 

src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBConnection.java

@@ -14,41 +14,17 @@
  *****************************************************************************/
 package com.taosdata.jdbc;
 
-import java.sql.Array;
-import java.sql.Blob;
-import java.sql.CallableStatement;
-import java.sql.Clob;
-import java.sql.Connection;
-import java.sql.DatabaseMetaData;
-import java.sql.NClob;
-import java.sql.PreparedStatement;
-import java.sql.ResultSet;
-import java.sql.SQLClientInfoException;
-import java.sql.SQLException;
-import java.sql.SQLWarning;
-import java.sql.SQLXML;
-import java.sql.Savepoint;
-import java.sql.Statement;
-import java.sql.Struct;
-import java.util.*;
-import java.util.concurrent.Executor;
+import java.sql.*;
+import java.util.Properties;
 
-public class TSDBConnection implements Connection {
+public class TSDBConnection extends AbstractConnection {
 
-    private TSDBJNIConnector connector = null;
-
-    private String catalog = null;
-
-    private TSDBDatabaseMetaData dbMetaData;
-
-    private Properties clientInfoProps = new Properties();
-
-    private int timeoutMilliseconds = 0;
-
-    private boolean batchFetch = false;
+    private TSDBJNIConnector connector;
+    private TSDBDatabaseMetaData databaseMetaData;
+    private boolean batchFetch;
 
     public TSDBConnection(Properties info, TSDBDatabaseMetaData meta) throws SQLException {
-        this.dbMetaData = meta;
+        this.databaseMetaData = meta;
         connect(info.getProperty(TSDBDriver.PROPERTY_KEY_HOST),
                 Integer.parseInt(info.getProperty(TSDBDriver.PROPERTY_KEY_PORT, "0")),
                 info.getProperty(TSDBDriver.PROPERTY_KEY_DBNAME),
@@ -64,8 +40,8 @@ public class TSDBConnection implements Connection {
     private void connect(String host, int port, String dbName, String user, String password) throws SQLException {
         this.connector = new TSDBJNIConnector();
         this.connector.connect(host, port, dbName, user, password);
-        this.setCatalog(dbName);
-        this.dbMetaData.setConnection(this);
+        this.catalog = dbName;
+        this.databaseMetaData.setConnection(this);
     }
 
     public TSDBJNIConnector getConnection() {
@@ -102,52 +78,11 @@ public class TSDBConnection implements Connection {
         return new TSDBPreparedStatement(this, this.connector, sql);
     }
 
-    public CallableStatement prepareCall(String sql) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public String nativeSQL(String sql) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void setAutoCommit(boolean autoCommit) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-
-    }
-
-    public boolean getAutoCommit() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-
-        return true;
-    }
-
-    public void commit() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-    }
-
-    public void rollback() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
     public void close() throws SQLException {
         if (isClosed()) {
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
         }
+        this.isClosed = true;
         this.connector.closeConnection();
     }
 
@@ -155,105 +90,11 @@ public class TSDBConnection implements Connection {
         return this.connector != null && this.connector.isClosed();
     }
 
-    /**
-     * A connection's database is able to provide information describing its tables,
-     * its supported SQL grammar, its stored procedures, the capabilities of this
-     * connection, etc. This information is made available through a
-     * DatabaseMetaData object.
-     *
-     * @return a DatabaseMetaData object for this connection
-     * @throws SQLException if a database access error occurs
-     */
     public DatabaseMetaData getMetaData() throws SQLException {
         if (isClosed()) {
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
         }
-        return this.dbMetaData;
-    }
-
-    /**
-     * This readOnly option is not supported by TDengine. However, the method is intentionally left blank here to
-     * support HikariCP connection.
-     *
-     * @param readOnly
-     * @throws SQLException
-     */
-    public void setReadOnly(boolean readOnly) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-    }
-
-    public boolean isReadOnly() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return true;
-    }
-
-    public void setCatalog(String catalog) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        this.catalog = catalog;
-    }
-
-    public String getCatalog() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return this.catalog;
-    }
-
-    /**
-     * The transaction isolation level option is not supported by TDengine.
-     * This method is intentionally left empty to support HikariCP connection.
-     *
-     * @param level
-     * @throws SQLException
-     */
-    public void setTransactionIsolation(int level) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        switch (level) {
-            case Connection.TRANSACTION_NONE:
-            case Connection.TRANSACTION_READ_COMMITTED:
-            case Connection.TRANSACTION_READ_UNCOMMITTED:
-            case Connection.TRANSACTION_REPEATABLE_READ:
-            case Connection.TRANSACTION_SERIALIZABLE:
-                break;
-            default:
-                throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
-        }
-    }
-
-    /**
-     * The transaction isolation level option is not supported by TDengine.
-     *
-     * @return
-     * @throws SQLException
-     */
-    public int getTransactionIsolation() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return Connection.TRANSACTION_NONE;
-    }
-
-    public SQLWarning getWarnings() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        //todo: implement getWarnings according to the warning messages returned from TDengine
-        return null;
-    }
-
-    public void clearWarnings() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        //todo: implement clearWarnings according to the warning messages returned from TDengine
+        return this.databaseMetaData;
     }
 
     public Statement createStatement(int resultSetType, int resultSetConcurrency) throws SQLException {
@@ -285,74 +126,6 @@ public class TSDBConnection implements Connection {
         this.batchFetch = batchFetch;
     }
 
-    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public Map<String, Class<?>> getTypeMap() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void setTypeMap(Map<String, Class<?>> map) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void setHoldability(int holdability) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-    }
-
-    /**
-     * the transaction is not supported by TDengine, so the opened ResultSet Objects will remain open
-     *
-     * @return
-     * @throws SQLException
-     */
-    public int getHoldability() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return ResultSet.HOLD_CURSORS_OVER_COMMIT;
-    }
-
-    public Savepoint setSavepoint() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public Savepoint setSavepoint(String name) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void rollback(Savepoint savepoint) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void releaseSavepoint(Savepoint savepoint) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
     public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability)
             throws SQLException {
         if (isClosed()) {
@@ -369,147 +142,8 @@ public class TSDBConnection implements Connection {
         throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
-    public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency,
-                                         int resultSetHoldability) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public Clob createClob() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public Blob createBlob() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public NClob createNClob() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public SQLXML createSQLXML() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
     public boolean isValid(int timeout) throws SQLException {
         return !this.isClosed();
     }
 
-    public void setClientInfo(String name, String value) throws SQLClientInfoException {
-        clientInfoProps.setProperty(name, value);
-    }
-
-    public void setClientInfo(Properties properties) throws SQLClientInfoException {
-        for (Enumeration<Object> enumer = properties.keys(); enumer.hasMoreElements(); ) {
-            String name = (String) enumer.nextElement();
-            clientInfoProps.put(name, properties.getProperty(name));
-        }
-    }
-
-    public String getClientInfo(String name) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return clientInfoProps.getProperty(name);
-    }
-
-    public Properties getClientInfo() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return clientInfoProps;
-    }
-
-    public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void setSchema(String schema) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public String getSchema() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void abort(Executor executor) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-    }
-
-    public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
-        this.timeoutMilliseconds = milliseconds;
-    }
-
-    public int getNetworkTimeout() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_CONNECTION_CLOSED);
-        }
-        return this.timeoutMilliseconds;
-    }
-
-    public <T> T unwrap(Class<T> iface) throws SQLException {
-        try {
-            return iface.cast(this);
-        } catch (ClassCastException cce) {
-            throw new SQLException("Unable to unwrap to " + iface.toString());
-        }
-    }
-
-    public boolean isWrapperFor(Class<?> iface) throws SQLException {
-        return iface.isInstance(this);
-    }
 }

src/connector/jdbc/src/main/java/com/taosdata/jdbc/TSDBError.java

 package com.taosdata.jdbc;
 
+import java.sql.SQLClientInfoException;
 import java.sql.SQLException;
 import java.sql.SQLFeatureNotSupportedException;
 import java.util.HashMap;
@@ -58,4 +59,8 @@ public class TSDBError {
         // JNI exception's error number is large than 0x2350
         return new SQLException("TDengine ERROR (" + Integer.toHexString(errorNumber) + "): " + message);
     }
+
+    public static SQLClientInfoException createSQLClientInfoException(int errorNumber) {
+        return new SQLClientInfoException();
+    }
 }

src/connector/jdbc/src/test/java/com/taosdata/jdbc/TSDBConnectionTest.java

+package com.taosdata.jdbc;
+
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.sql.Connection;
+import java.sql.Driver;
+import java.sql.DriverManager;
+import java.sql.SQLException;
+import java.util.Properties;
+
+import static org.junit.Assert.*;
+
+public class TSDBConnectionTest {
+
+    private static final String host = "127.0.0.1";
+    private static Connection conn;
+
+    @Test
+    public void getConnection() {
+    }
+
+    @Test
+    public void createStatement() {
+    }
+
+    @Test
+    public void subscribe() {
+    }
+
+    @Test
+    public void prepareStatement() {
+    }
+
+    @Test
+    public void prepareCall() {
+    }
+
+    @Test
+    public void nativeSQL() {
+    }
+
+    @Test
+    public void setAutoCommit() {
+    }
+
+    @Test
+    public void getAutoCommit() {
+    }
+
+    @Test
+    public void commit() {
+    }
+
+    @Test
+    public void rollback() {
+    }
+
+    @Test
+    public void close() {
+    }
+
+    @Test
+    public void isClosed() {
+    }
+
+    @Test
+    public void getMetaData() {
+    }
+
+    @Test
+    public void setReadOnly() {
+    }
+
+    @Test
+    public void isReadOnly() {
+    }
+
+    @Test
+    public void setCatalog() {
+    }
+
+    @Test
+    public void getCatalog() {
+    }
+
+    @Test
+    public void setTransactionIsolation() {
+    }
+
+    @Test
+    public void getTransactionIsolation() {
+    }
+
+    @Test
+    public void getWarnings() {
+    }
+
+    @Test
+    public void clearWarnings() {
+    }
+
+    @Test
+    public void testCreateStatement() {
+    }
+
+    @Test
+    public void testPrepareStatement() {
+    }
+
+    @Test
+    public void getBatchFetch() {
+    }
+
+    @Test
+    public void setBatchFetch() {
+    }
+
+    @Test
+    public void testPrepareCall() {
+    }
+
+    @Test
+    public void getTypeMap() {
+    }
+
+    @Test
+    public void setTypeMap() {
+    }
+
+    @Test
+    public void setHoldability() {
+    }
+
+    @Test
+    public void getHoldability() {
+    }
+
+    @Test
+    public void setSavepoint() {
+    }
+
+    @Test
+    public void testSetSavepoint() {
+    }
+
+    @Test
+    public void testRollback() {
+    }
+
+    @Test
+    public void releaseSavepoint() {
+    }
+
+    @Test
+    public void testCreateStatement1() {
+    }
+
+    @Test
+    public void testPrepareStatement1() {
+    }
+
+    @Test
+    public void testPrepareCall1() {
+    }
+
+    @Test
+    public void testPrepareStatement2() {
+    }
+
+    @Test
+    public void testPrepareStatement3() {
+    }
+
+    @Test
+    public void testPrepareStatement4() {
+    }
+
+    @Test
+    public void createClob() {
+    }
+
+    @Test
+    public void createBlob() {
+    }
+
+    @Test
+    public void createNClob() {
+    }
+
+    @Test
+    public void createSQLXML() {
+    }
+
+    @Test
+    public void isValid() {
+    }
+
+    @Test
+    public void setClientInfo() {
+    }
+
+    @Test
+    public void testSetClientInfo() {
+    }
+
+    @Test
+    public void getClientInfo() {
+    }
+
+    @Test
+    public void testGetClientInfo() {
+    }
+
+    @Test
+    public void createArrayOf() {
+    }
+
+    @Test
+    public void createStruct() {
+    }
+
+    @Test
+    public void setSchema() {
+    }
+
+    @Test
+    public void getSchema() {
+    }
+
+    @Test
+    public void abort() {
+    }
+
+    @Test
+    public void setNetworkTimeout() {
+    }
+
+    @Test
+    public void getNetworkTimeout() {
+    }
+
+    @Test
+    public void unwrap() {
+        try {
+            TSDBConnection tsdbConnection = conn.unwrap(TSDBConnection.class);
+            Assert.assertNotNull(tsdbConnection);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void isWrapperFor() throws SQLException {
+        Assert.assertTrue(conn.isWrapperFor(TSDBConnection.class));
+    }
+
+    @BeforeClass
+    public static void beforeClass() {
+        try {
+            Class.forName("com.taosdata.jdbc.TSDBDriver");
+            Properties properties = new Properties();
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_CHARSET, "UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_LOCALE, "en_US.UTF-8");
+            properties.setProperty(TSDBDriver.PROPERTY_KEY_TIME_ZONE, "UTC-8");
+            conn = DriverManager.getConnection("jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata", properties);
+        } catch (ClassNotFoundException | SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        try {
+            if (conn != null)
+                conn.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+}
\ No newline at end of file