Merge pull request #5177 from taosdata/feature/TD-2005

[TD-2005]<feature>: add Error Number for jdbc driver errors

cmake/install.inc

@@ -32,7 +32,7 @@ ELSEIF (TD_WINDOWS)
   #INSTALL(TARGETS taos RUNTIME DESTINATION driver)
   #INSTALL(TARGETS shell RUNTIME DESTINATION .)
   IF (TD_MVN_INSTALLED)
-    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.18-dist.jar DESTINATION connector/jdbc)
+    INSTALL(FILES ${LIBRARY_OUTPUT_PATH}/taos-jdbcdriver-2.0.19-dist.jar DESTINATION connector/jdbc)
   ENDIF ()
 ELSEIF (TD_DARWIN)
   SET(TD_MAKE_INSTALL_SH "${TD_COMMUNITY_DIR}/packaging/tools/make_install.sh")

src/connector/jdbc/CMakeLists.txt

@@ -8,7 +8,7 @@ IF (TD_MVN_INSTALLED)
   ADD_CUSTOM_COMMAND(OUTPUT ${JDBC_CMD_NAME}
     POST_BUILD
     COMMAND mvn -Dmaven.test.skip=true install -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
-    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.18-dist.jar ${LIBRARY_OUTPUT_PATH}
+    COMMAND ${CMAKE_COMMAND} -E copy ${CMAKE_CURRENT_SOURCE_DIR}/target/taos-jdbcdriver-2.0.19-dist.jar ${LIBRARY_OUTPUT_PATH}
     COMMAND mvn -Dmaven.test.skip=true clean -f ${CMAKE_CURRENT_SOURCE_DIR}/pom.xml
     COMMENT "build jdbc driver")
   ADD_CUSTOM_TARGET(${JDBC_TARGET_NAME} ALL WORKING_DIRECTORY ${EXECUTABLE_OUTPUT_PATH} DEPENDS ${JDBC_CMD_NAME})

src/connector/jdbc/deploy-pom.xml

@@ -5,7 +5,7 @@
 
   <groupId>com.taosdata.jdbc</groupId>
   <artifactId>taos-jdbcdriver</artifactId>
-  <version>2.0.18</version>
+  <version>2.0.19</version>
   <packaging>jar</packaging>
 
   <name>JDBCDriver</name>

src/connector/jdbc/pom.xml

@@ -3,7 +3,7 @@
     <modelVersion>4.0.0</modelVersion>
     <groupId>com.taosdata.jdbc</groupId>
     <artifactId>taos-jdbcdriver</artifactId>
-    <version>2.0.18</version>
+    <version>2.0.19</version>
     <packaging>jar</packaging>
     <name>JDBCDriver</name>
     <url>https://github.com/taosdata/TDengine/tree/master/src/connector/jdbc</url>
@@ -81,8 +81,6 @@
             <artifactId>commons-dbcp2</artifactId>
             <version>2.7.0</version>
         </dependency>
-
-
     </dependencies>
 
     <build>
@@ -132,6 +130,7 @@
                         <exclude>**/AppMemoryLeakTest.java</exclude>
                         <exclude>**/TaosInfoMonitorTest.java</exclude>
                         <exclude>**/FailOverTest.java</exclude>
+                        <exclude>**/InvalidResultSetPointerTest.java</exclude>
                     </excludes>
                     <testFailureIgnore>true</testFailureIgnore>
                 </configuration>

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

@@ -8,7 +8,7 @@ import java.util.List;
 import java.util.Properties;
 import java.util.StringTokenizer;
 
-public abstract class AbstractTaosDriver implements Driver {
+public abstract class AbstractDriver implements Driver {
 
     private static final String TAOS_CFG_FILENAME = "taos.cfg";
 

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

@@ -0,0 +1,249 @@
+package com.taosdata.jdbc;
+
+import java.sql.*;
+
+public abstract class AbstractStatement extends WrapperImpl implements Statement {
+
+    private volatile boolean closeOnCompletion;
+    private int fetchSize;
+
+    @Override
+    public abstract ResultSet executeQuery(String sql) throws SQLException;
+
+    @Override
+    public abstract int executeUpdate(String sql) throws SQLException;
+
+    @Override
+    public abstract void close() throws SQLException;
+
+    @Override
+    public int getMaxFieldSize() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return TSDBConstants.maxFieldSize;
+    }
+
+    @Override
+    public void setMaxFieldSize(int max) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (max < 0)
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
+        // nothing to do
+    }
+
+    @Override
+    public int getMaxRows() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return 0;
+    }
+
+    @Override
+    public void setMaxRows(int max) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (max < 0)
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
+        // nothing to do
+    }
+
+    @Override
+    public void setEscapeProcessing(boolean enable) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+    }
+
+    @Override
+    public int getQueryTimeout() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return 0;
+    }
+
+    @Override
+    public void setQueryTimeout(int seconds) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (seconds < 0)
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
+    }
+
+    @Override
+    public void cancel() throws SQLException {
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public SQLWarning getWarnings() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return null;
+    }
+
+    @Override
+    public void clearWarnings() throws SQLException {
+        // nothing to do
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+    }
+
+    @Override
+    public void setCursorName(String name) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
+    }
+
+    @Override
+    public abstract boolean execute(String sql) throws SQLException;
+
+    @Override
+    public abstract ResultSet getResultSet() throws SQLException;
+
+    @Override
+    public abstract int getUpdateCount() throws SQLException;
+
+    @Override
+    public boolean getMoreResults() throws SQLException {
+        return getMoreResults(CLOSE_CURRENT_RESULT);
+    }
+
+    @Override
+    public void setFetchDirection(int direction) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        //nothing to do
+    }
+
+    @Override
+    public int getFetchDirection() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return ResultSet.FETCH_FORWARD;
+    }
+
+    @Override
+    public void setFetchSize(int rows) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (rows < 0)
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
+        //nothing to do
+        this.fetchSize = rows;
+    }
+
+    @Override
+    public int getFetchSize() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return this.fetchSize;
+    }
+
+    @Override
+    public int getResultSetConcurrency() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return ResultSet.CONCUR_READ_ONLY;
+    }
+
+    @Override
+    public int getResultSetType() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return ResultSet.TYPE_FORWARD_ONLY;
+    }
+
+    @Override
+    public abstract void addBatch(String sql) throws SQLException;
+
+    @Override
+    public abstract void clearBatch() throws SQLException;
+
+    @Override
+    public abstract int[] executeBatch() throws SQLException;
+
+    @Override
+    public abstract Connection getConnection() throws SQLException;
+
+    @Override
+    public boolean getMoreResults(int current) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return false;
+    }
+
+    @Override
+    public ResultSet getGeneratedKeys() throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public boolean execute(String sql, String[] columnNames) throws SQLException {
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
+    }
+
+    @Override
+    public int getResultSetHoldability() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return ResultSet.HOLD_CURSORS_OVER_COMMIT;
+    }
+
+    @Override
+    public abstract boolean isClosed() throws SQLException;
+
+    @Override
+    public void setPoolable(boolean poolable) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        //nothing to do
+    }
+
+    @Override
+    public boolean isPoolable() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return false;
+    }
+
+    @Override
+    public void closeOnCompletion() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        this.closeOnCompletion = true;
+    }
+
+    @Override
+    public boolean isCloseOnCompletion() throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        return this.closeOnCompletion;
+    }
+
+}

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

@@ -160,12 +160,12 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public Date getDate(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Time getTime(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -176,17 +176,17 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public InputStream getAsciiStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public InputStream getUnicodeStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public InputStream getBinaryStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -256,22 +256,22 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public InputStream getAsciiStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public InputStream getUnicodeStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public InputStream getBinaryStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public SQLWarning getWarnings() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -281,7 +281,7 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public String getCursorName() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -313,12 +313,12 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public Reader getCharacterStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Reader getCharacterStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -353,22 +353,22 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public void beforeFirst() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void afterLast() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public boolean first() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public boolean last() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -383,17 +383,17 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public boolean absolute(int row) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public boolean relative(int rows) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public boolean previous() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -443,227 +443,227 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public void updateNull(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBoolean(int columnIndex, boolean x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateByte(int columnIndex, byte x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateShort(int columnIndex, short x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateInt(int columnIndex, int x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateLong(int columnIndex, long x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateFloat(int columnIndex, float x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateDouble(int columnIndex, double x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateString(int columnIndex, String x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBytes(int columnIndex, byte[] x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateDate(int columnIndex, Date x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateTime(int columnIndex, Time x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateTimestamp(int columnIndex, Timestamp x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateAsciiStream(int columnIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBinaryStream(int columnIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateCharacterStream(int columnIndex, Reader x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateObject(int columnIndex, Object x, int scaleOrLength) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateObject(int columnIndex, Object x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateNull(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBoolean(String columnLabel, boolean x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateByte(String columnLabel, byte x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateShort(String columnLabel, short x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateInt(String columnLabel, int x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateLong(String columnLabel, long x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateFloat(String columnLabel, float x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateDouble(String columnLabel, double x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBigDecimal(String columnLabel, BigDecimal x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateString(String columnLabel, String x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBytes(String columnLabel, byte[] x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateDate(String columnLabel, Date x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateTime(String columnLabel, Time x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateTimestamp(String columnLabel, Timestamp x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateAsciiStream(String columnLabel, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateBinaryStream(String columnLabel, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateCharacterStream(String columnLabel, Reader reader, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateObject(String columnLabel, Object x, int scaleOrLength) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateObject(String columnLabel, Object x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void insertRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void updateRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void deleteRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void refreshRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void cancelRowUpdates() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void moveToInsertRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void moveToCurrentRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -673,12 +673,12 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public Object getObject(int columnIndex, Map<String, Class<?>> map) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Ref getRef(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -1043,12 +1043,12 @@ public class DatabaseMetaDataResultSet implements ResultSet {
 
     @Override
     public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public <T> T getObject(String columnLabel, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override

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

@@ -20,7 +20,7 @@ import java.util.Map;
 public abstract class TSDBConstants {
 
     public static final String STATEMENT_CLOSED = "statement is closed";
-    public static final String UNSUPPORT_METHOD_EXCEPTIONZ_MSG = "this operation is NOT supported currently!";
+    public static final String UNSUPPORTED_METHOD_EXCEPTION_MSG = "this operation is NOT supported currently!";
     public static final String INVALID_VARIABLES = "invalid variables";
     public static final String RESULT_SET_IS_CLOSED = "resultSet is closed";
 
@@ -36,6 +36,7 @@ public abstract class TSDBConstants {
     public static final int JNI_NUM_OF_FIELDS_0 = -4;
     public static final int JNI_SQL_NULL = -5;
     public static final int JNI_FETCH_END = -6;
+    public static final int JNI_OUT_OF_MEMORY = -7;
 
     public static final int TSDB_DATA_TYPE_NULL = 0;
     public static final int TSDB_DATA_TYPE_BOOL = 1;

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

@@ -37,7 +37,7 @@ import java.util.logging.Logger;
  * register it with the DriverManager. This means that a user can load and
  * register a driver by doing Class.forName("foo.bah.Driver")
  */
-public class TSDBDriver extends AbstractTaosDriver {
+public class TSDBDriver extends AbstractDriver {
 
     @Deprecated
     private static final String URL_PREFIX1 = "jdbc:TSDB://";

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

@@ -1,6 +1,7 @@
 package com.taosdata.jdbc;
 
 import java.sql.SQLException;
+import java.sql.SQLFeatureNotSupportedException;
 import java.util.HashMap;
 import java.util.Map;
 
@@ -13,8 +14,23 @@ public class TSDBError {
         TSDBErrorMap.put(TSDBErrorNumbers.ERROR_INVALID_VARIABLE, "invalid variables");
         TSDBErrorMap.put(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED, "statement is closed");
         TSDBErrorMap.put(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED, "resultSet is closed");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_BATCH_IS_EMPTY, "Batch is empty!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_INVALID_WITH_EXECUTEQUERY, "Can not issue data manipulation statements with executeQuery()");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_INVALID_WITH_EXECUTEUPDATE, "Can not issue SELECT via executeUpdate()");
+
+        /**************************************************/
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_UNKNOWN, "unknown error");
         /**************************************************/
         TSDBErrorMap.put(TSDBErrorNumbers.ERROR_SUBSCRIBE_FAILED, "failed to create subscription");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_UNSUPPORTED_ENCODING, "Unsupported encoding");
+
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_TDENGINE_ERROR, "internal error of database!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_CONNECTION_NULL, "JNI connection already closed!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_RESULT_SET_NULL, "invalid JNI result set!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_NUM_OF_FIELDS_0, "invalid num of fields!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_SQL_NULL, "empty sql string!");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_FETCH_END, "fetch to the end of resultset");
+        TSDBErrorMap.put(TSDBErrorNumbers.ERROR_JNI_OUT_OF_MEMORY, "JNI alloc memory failed!");
     }
 
     public static String wrapErrMsg(String msg) {
@@ -22,10 +38,24 @@ public class TSDBError {
     }
 
     public static SQLException createSQLException(int errorNumber) {
-        // JDBC exception code is less than 0x2350
+        return createSQLException(errorNumber, null);
-        if (errorNumber <= 0x2350)
+    }
-            return new SQLException(TSDBErrorMap.get(errorNumber));
+
-        // JNI exception code is
+    public static SQLException createSQLException(int errorNumber, String message) {
-        return new SQLException(wrapErrMsg(TSDBErrorMap.get(errorNumber)));
+        if (message == null || message.isEmpty()) {
+            if (TSDBErrorNumbers.contains(errorNumber))
+                message = TSDBErrorMap.get(errorNumber);
+            else
+                message = TSDBErrorMap.get(TSDBErrorNumbers.ERROR_UNKNOWN);
+        }
+
+        if (errorNumber == TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD)
+            return new SQLFeatureNotSupportedException(message);
+
+        if (errorNumber < TSDBErrorNumbers.ERROR_UNKNOWN)
+            // JDBC exception's error number is less than 0x2350
+            return new SQLException("ERROR (" + Integer.toHexString(errorNumber) + "): " + message);
+        // JNI exception's error number is large than 0x2350
+        return new SQLException("TDengine ERROR (" + Integer.toHexString(errorNumber) + "): " + message);
     }
 }

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

@@ -1,5 +1,7 @@
 package com.taosdata.jdbc;
 
+import java.util.HashSet;
+
 public class TSDBErrorNumbers {
 
     public static final int ERROR_CONNECTION_CLOSED = 0x2301;   // connection already closed
@@ -7,9 +9,52 @@ public class TSDBErrorNumbers {
     public static final int ERROR_INVALID_VARIABLE = 0x2303;    //invalid variables
     public static final int ERROR_STATEMENT_CLOSED = 0x2304;    //statement already closed
     public static final int ERROR_RESULTSET_CLOSED = 0x2305;    //resultSet is closed
+    public static final int ERROR_BATCH_IS_EMPTY = 0x2306;      //Batch is empty!
+    public static final int ERROR_INVALID_WITH_EXECUTEQUERY = 0x2307;  //Can not issue data manipulation statements with executeQuery()
+    public static final int ERROR_INVALID_WITH_EXECUTEUPDATE = 0x2308; //Can not issue SELECT via executeUpdate()
 
-    public static final int ERROR_SUBSCRIBE_FAILED = 0x2350;    //failed to create subscription
+    public static final int ERROR_UNKNOWN = 0x2350;    //unknown error
+
+    public static final int ERROR_SUBSCRIBE_FAILED = 0x2351;    //failed to create subscription
+    public static final int ERROR_UNSUPPORTED_ENCODING = 0x2352; //Unsupported encoding
+
+    public static final int ERROR_JNI_TDENGINE_ERROR = 0x2353;
+    public static final int ERROR_JNI_CONNECTION_NULL = 0x2354;  //invalid tdengine connection!
+    public static final int ERROR_JNI_RESULT_SET_NULL = 0x2355;
+    public static final int ERROR_JNI_NUM_OF_FIELDS_0 = 0x2356;
+    public static final int ERROR_JNI_SQL_NULL = 0x2357;
+    public static final int ERROR_JNI_FETCH_END = 0x2358;
+    public static final int ERROR_JNI_OUT_OF_MEMORY = 0x2359;
+
+    private static final HashSet<Integer> errorNumbers;
+
+    static {
+        errorNumbers = new HashSet();
+        errorNumbers.add(ERROR_CONNECTION_CLOSED);
+        errorNumbers.add(ERROR_UNSUPPORTED_METHOD);
+        errorNumbers.add(ERROR_INVALID_VARIABLE);
+        errorNumbers.add(ERROR_STATEMENT_CLOSED);
+        errorNumbers.add(ERROR_RESULTSET_CLOSED);
+        errorNumbers.add(ERROR_INVALID_WITH_EXECUTEQUERY);
+        errorNumbers.add(ERROR_INVALID_WITH_EXECUTEUPDATE);
+        /*****************************************************/
+        errorNumbers.add(ERROR_SUBSCRIBE_FAILED);
+        errorNumbers.add(ERROR_UNSUPPORTED_ENCODING);
+
+        errorNumbers.add(ERROR_JNI_TDENGINE_ERROR);
+        errorNumbers.add(ERROR_JNI_CONNECTION_NULL);
+        errorNumbers.add(ERROR_JNI_RESULT_SET_NULL);
+        errorNumbers.add(ERROR_JNI_NUM_OF_FIELDS_0);
+        errorNumbers.add(ERROR_JNI_SQL_NULL);
+        errorNumbers.add(ERROR_JNI_FETCH_END);
+        errorNumbers.add(ERROR_JNI_OUT_OF_MEMORY);
+
+    }
 
     private TSDBErrorNumbers() {
     }
+
+    public static boolean contains(int errorNumber) {
+        return errorNumbers.contains(errorNumber);
+    }
 }

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

@@ -38,7 +38,7 @@ public class TSDBJNIConnector {
     /**
      * Result set pointer for the current connection
      */
-    private long taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
+//    private long taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
 
     /**
      * result set status in current connection
@@ -119,9 +119,9 @@ public class TSDBJNIConnector {
     public long executeQuery(String sql) throws SQLException {
         // close previous result set if the user forgets to invoke the
         // free method to close previous result set.
-        if (!this.isResultsetClosed) {
+//        if (!this.isResultsetClosed) {
-            freeResultSet(taosResultSetPointer);
+//            freeResultSet(taosResultSetPointer);
-        }
+//        }
 
         Long pSql = 0l;
         try {
@@ -130,21 +130,32 @@ public class TSDBJNIConnector {
         } catch (Exception e) {
             e.printStackTrace();
             this.freeResultSetImp(this.taos, pSql);
-            throw new SQLException(TSDBConstants.WrapErrMsg("Unsupported encoding"));
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_ENCODING);
+        }
+        if (pSql == TSDBConstants.JNI_CONNECTION_NULL) {
+            this.freeResultSetImp(this.taos, pSql);
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_JNI_CONNECTION_NULL);
+        }
+        if (pSql == TSDBConstants.JNI_SQL_NULL) {
+            this.freeResultSetImp(this.taos, pSql);
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_JNI_SQL_NULL);
+        }
+        if (pSql == TSDBConstants.JNI_OUT_OF_MEMORY) {
+            this.freeResultSetImp(this.taos, pSql);
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_JNI_OUT_OF_MEMORY);
         }
 
         int code = this.getErrCode(pSql);
-        if (code != 0) {
+        if (code != TSDBConstants.JNI_SUCCESS) {
             affectedRows = -1;
             String msg = this.getErrMsg(pSql);
-
             this.freeResultSetImp(this.taos, pSql);
-            throw new SQLException(TSDBConstants.WrapErrMsg(msg), "", code);
+            throw TSDBError.createSQLException(code, msg);
         }
 
         // Try retrieving result set for the executed SQL using the current connection pointer. 
-        taosResultSetPointer = this.getResultSetImp(this.taos, pSql);
+        pSql = this.getResultSetImp(this.taos, pSql);
-        isResultsetClosed = (taosResultSetPointer == TSDBConstants.JNI_NULL_POINTER);
+        isResultsetClosed = (pSql == TSDBConstants.JNI_NULL_POINTER);
 
         return pSql;
     }
@@ -173,9 +184,9 @@ public class TSDBJNIConnector {
      * Get resultset pointer
      * Each connection should have a single open result set at a time
      */
-    public long getResultSet() {
+//    public long getResultSet() {
-        return taosResultSetPointer;
+//        return taosResultSetPointer;
-    }
+//    }
 
     private native long getResultSetImp(long connection, long pSql);
 
@@ -188,16 +199,16 @@ public class TSDBJNIConnector {
     /**
      * Free resultset operation from C to release resultset pointer by JNI
      */
-    public int freeResultSet(long result) {
+    public int freeResultSet(long pSql) {
         int res = TSDBConstants.JNI_SUCCESS;
-        if (result != taosResultSetPointer && taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
+//        if (result != taosResultSetPointer && taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
-            throw new RuntimeException("Invalid result set pointer");
+//            throw new RuntimeException("Invalid result set pointer");
-        }
+//        }
 
-        if (taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
+//        if (taosResultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
-            res = this.freeResultSetImp(this.taos, result);
+            res = this.freeResultSetImp(this.taos, pSql);
-            taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
+//            taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
-        }
+//        }
 
         isResultsetClosed = true;
         return res;
@@ -207,15 +218,15 @@ public class TSDBJNIConnector {
      * Close the open result set which is associated to the current connection. If the result set is already
      * closed, return 0 for success.
      */
-    public int freeResultSet() {
+//    public int freeResultSet() {
-        int resCode = TSDBConstants.JNI_SUCCESS;
+//        int resCode = TSDBConstants.JNI_SUCCESS;
-        if (!isResultsetClosed) {
+//        if (!isResultsetClosed) {
-            resCode = this.freeResultSetImp(this.taos, this.taosResultSetPointer);
+//            resCode = this.freeResultSetImp(this.taos, this.taosResultSetPointer);
-            taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
+//            taosResultSetPointer = TSDBConstants.JNI_NULL_POINTER;
-            isResultsetClosed = true;
+//            isResultsetClosed = true;
-        }
+//        }
-        return resCode;
+//        return resCode;
-    }
+//    }
 
     private native int freeResultSetImp(long connection, long result);
 

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

@@ -264,17 +264,17 @@ public class TSDBPreparedStatement extends TSDBStatement implements PreparedStat
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setUnicodeStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -284,7 +284,7 @@ public class TSDBPreparedStatement extends TSDBStatement implements PreparedStat
 
     @Override
     public void setObject(int parameterIndex, Object x, int targetSqlType) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -321,156 +321,156 @@ public class TSDBPreparedStatement extends TSDBStatement implements PreparedStat
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader reader, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setRef(int parameterIndex, Ref x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBlob(int parameterIndex, Blob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setClob(int parameterIndex, Clob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setArray(int parameterIndex, Array x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public ResultSetMetaData getMetaData() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setDate(int parameterIndex, Date x, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setTime(int parameterIndex, Time x, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setTimestamp(int parameterIndex, Timestamp x, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNull(int parameterIndex, int sqlType, String typeName) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setURL(int parameterIndex, URL x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public ParameterMetaData getParameterMetaData() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setRowId(int parameterIndex, RowId x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNString(int parameterIndex, String value) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNCharacterStream(int parameterIndex, Reader value, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNClob(int parameterIndex, NClob value) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setClob(int parameterIndex, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBlob(int parameterIndex, InputStream inputStream, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNClob(int parameterIndex, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setSQLXML(int parameterIndex, SQLXML xmlObject) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setObject(int parameterIndex, Object x, int targetSqlType, int scaleOrLength) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setAsciiStream(int parameterIndex, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBinaryStream(int parameterIndex, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setCharacterStream(int parameterIndex, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNCharacterStream(int parameterIndex, Reader value) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setClob(int parameterIndex, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setBlob(int parameterIndex, InputStream inputStream) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void setNClob(int parameterIndex, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 }

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

@@ -14,36 +14,17 @@
  *****************************************************************************/
 package com.taosdata.jdbc;
 
-import java.io.InputStream;
-import java.io.Reader;
 import java.math.BigDecimal;
-import java.net.URL;
+import java.sql.*;
-import java.sql.Array;
-import java.sql.Blob;
-import java.sql.Clob;
-import java.sql.Date;
-import java.sql.NClob;
-import java.sql.Ref;
-import java.sql.ResultSet;
-import java.sql.ResultSetMetaData;
-import java.sql.RowId;
-import java.sql.SQLException;
-import java.sql.SQLWarning;
-import java.sql.SQLXML;
-import java.sql.Statement;
-import java.sql.Time;
-import java.sql.Timestamp;
 import java.util.ArrayList;
-import java.util.Calendar;
-import java.util.Iterator;
 import java.util.List;
-import java.util.Map;
 
-public class TSDBResultSet implements ResultSet {
+public class TSDBResultSet extends AbstractResultSet implements ResultSet {
-    private TSDBJNIConnector jniConnector = null;
+    private TSDBJNIConnector jniConnector;
 
+    private final TSDBStatement statement;
     private long resultSetPointer = 0L;
-    private List<ColumnMetaData> columnMetaDataList = new ArrayList<ColumnMetaData>();
+    private List<ColumnMetaData> columnMetaDataList = new ArrayList<>();
 
     private TSDBResultSetRowData rowData;
     private TSDBResultSetBlockData blockData;
@@ -52,24 +33,6 @@ public class TSDBResultSet implements ResultSet {
     private boolean lastWasNull = false;
     private final int COLUMN_INDEX_START_VALUE = 1;
 
-    private int rowIndex = 0;
-
-    public TSDBJNIConnector getJniConnector() {
-        return jniConnector;
-    }
-
-    public void setJniConnector(TSDBJNIConnector jniConnector) {
-        this.jniConnector = jniConnector;
-    }
-
-    public long getResultSetPointer() {
-        return resultSetPointer;
-    }
-
-    public void setResultSetPointer(long resultSetPointer) {
-        this.resultSetPointer = resultSetPointer;
-    }
-
     public void setBatchFetch(boolean batchFetch) {
         this.batchFetch = batchFetch;
     }
@@ -78,10 +41,6 @@ public class TSDBResultSet implements ResultSet {
         return this.batchFetch;
     }
 
-    public List<ColumnMetaData> getColumnMetaDataList() {
-        return columnMetaDataList;
-    }
-
     public void setColumnMetaDataList(List<ColumnMetaData> columnMetaDataList) {
         this.columnMetaDataList = columnMetaDataList;
     }
@@ -90,56 +49,25 @@ public class TSDBResultSet implements ResultSet {
         return rowData;
     }
 
-    public void setRowData(TSDBResultSetRowData rowData) {
+    public TSDBResultSet(TSDBStatement statement, TSDBJNIConnector connector, long resultSetPointer) throws SQLException {
-        this.rowData = rowData;
+        this.statement = statement;
-    }
-
-    public boolean isLastWasNull() {
-        return lastWasNull;
-    }
-
-    public void setLastWasNull(boolean lastWasNull) {
-        this.lastWasNull = lastWasNull;
-    }
-
-    public TSDBResultSet() {
-
-    }
-
-    public TSDBResultSet(TSDBJNIConnector connector, long resultSetPointer) throws SQLException {
         this.jniConnector = connector;
         this.resultSetPointer = resultSetPointer;
+
         int code = this.jniConnector.getSchemaMetaData(this.resultSetPointer, this.columnMetaDataList);
         if (code == TSDBConstants.JNI_CONNECTION_NULL) {
             throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_CONNECTION_NULL));
-        } else if (code == TSDBConstants.JNI_RESULT_SET_NULL) {
+        }
+        if (code == TSDBConstants.JNI_RESULT_SET_NULL) {
             throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_RESULT_SET_NULL));
-        } else if (code == TSDBConstants.JNI_NUM_OF_FIELDS_0) {
+        }
+        if (code == TSDBConstants.JNI_NUM_OF_FIELDS_0) {
             throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_NUM_OF_FIELDS_0));
         }
-
         this.rowData = new TSDBResultSetRowData(this.columnMetaDataList.size());
         this.blockData = new TSDBResultSetBlockData(this.columnMetaDataList, this.columnMetaDataList.size());
     }
 
-    public <T> T unwrap(Class<T> iface) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.WrapErrMsg(TSDBConstants.RESULT_SET_IS_CLOSED));
-
-        try {
-            return iface.cast(this);
-        } catch (ClassCastException cce) {
-            throw new SQLException("Unable to unwrap to " + iface.toString());
-        }
-    }
-
-    public boolean isWrapperFor(Class<?> iface) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.WrapErrMsg(TSDBConstants.RESULT_SET_IS_CLOSED));
-
-        return iface.isInstance(this);
-    }
-
     public boolean next() throws SQLException {
         if (this.getBatchFetch()) {
             if (this.blockData.forward()) {
@@ -273,7 +201,7 @@ public class TSDBResultSet implements ResultSet {
     }
 
     public long getLong(int columnIndex) throws SQLException {
-        long res = 0l;
+        long res = 0L;
         int colIndex = getTrueColumnIndex(columnIndex);
 
         if (!this.getBatchFetch()) {
@@ -317,14 +245,6 @@ public class TSDBResultSet implements ResultSet {
         }
     }
 
-    /*
-     * (non-Javadoc)
-     *
-     * @see java.sql.ResultSet#getBigDecimal(int, int)
-     *
-     * @deprecated Use {@code getBigDecimal(int columnIndex)} or {@code
-     * getBigDecimal(String columnLabel)}
-     */
     @Deprecated
     public BigDecimal getBigDecimal(int columnIndex, int scale) throws SQLException {
         return new BigDecimal(getLong(columnIndex));
@@ -334,16 +254,6 @@ public class TSDBResultSet implements ResultSet {
         return getString(columnIndex).getBytes();
     }
 
-    public Date getDate(int columnIndex) throws SQLException {
-        int colIndex = getTrueColumnIndex(columnIndex);
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Time getTime(int columnIndex) throws SQLException {
-        int colIndex = getTrueColumnIndex(columnIndex);
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     public Timestamp getTimestamp(int columnIndex) throws SQLException {
         Timestamp res = null;
         int colIndex = getTrueColumnIndex(columnIndex);
@@ -359,112 +269,11 @@ public class TSDBResultSet implements ResultSet {
         }
     }
 
-    public InputStream getAsciiStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    /*
-     * (non-Javadoc)
-     *
-     * @see java.sql.ResultSet#getUnicodeStream(int)
-     *
-     * * @deprecated use <code>getCharacterStream</code> in place of
-     * <code>getUnicodeStream</code>
-     */
-    @Deprecated
-    public InputStream getUnicodeStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public InputStream getBinaryStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public String getString(String columnLabel) throws SQLException {
-        return this.getString(this.findColumn(columnLabel));
-    }
-
-    public boolean getBoolean(String columnLabel) throws SQLException {
-        return this.getBoolean(this.findColumn(columnLabel));
-    }
-
-    public byte getByte(String columnLabel) throws SQLException {
-        return this.getByte(this.findColumn(columnLabel));
-    }
-
-    public short getShort(String columnLabel) throws SQLException {
-        return this.getShort(this.findColumn(columnLabel));
-    }
-
-    public int getInt(String columnLabel) throws SQLException {
-        return this.getInt(this.findColumn(columnLabel));
-    }
-
-    public long getLong(String columnLabel) throws SQLException {
-        return this.getLong(this.findColumn(columnLabel));
-    }
-
-    public float getFloat(String columnLabel) throws SQLException {
-        return this.getFloat(this.findColumn(columnLabel));
-    }
-
-    public double getDouble(String columnLabel) throws SQLException {
-        return this.getDouble(this.findColumn(columnLabel));
-    }
-
-    /*
-     * used by spark
-     */
-    @Deprecated
-    public BigDecimal getBigDecimal(String columnLabel, int scale) throws SQLException {
-        return this.getBigDecimal(this.findColumn(columnLabel), scale);
-    }
-
-    public byte[] getBytes(String columnLabel) throws SQLException {
-        return this.getBytes(this.findColumn(columnLabel));
-    }
-
-    public Date getDate(String columnLabel) throws SQLException {
-        return this.getDate(this.findColumn(columnLabel));
-    }
-
-    public Time getTime(String columnLabel) throws SQLException {
-        return this.getTime(this.findColumn(columnLabel));
-    }
-
-    public Timestamp getTimestamp(String columnLabel) throws SQLException {
-        return this.getTimestamp(this.findColumn(columnLabel));
-    }
-
-    public InputStream getAsciiStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Deprecated
-    public InputStream getUnicodeStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public InputStream getBinaryStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public SQLWarning getWarnings() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void clearWarnings() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public String getCursorName() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     public ResultSetMetaData getMetaData() throws SQLException {
         return new TSDBResultSetMetaData(this.columnMetaDataList);
     }
 
+    @Override
     public Object getObject(int columnIndex) throws SQLException {
         int colIndex = getTrueColumnIndex(columnIndex);
 
@@ -476,32 +285,21 @@ public class TSDBResultSet implements ResultSet {
         }
     }
 
+    @Override
     public Object getObject(String columnLabel) throws SQLException {
         return this.getObject(this.findColumn(columnLabel));
     }
 
     public int findColumn(String columnLabel) throws SQLException {
-        Iterator<ColumnMetaData> colMetaDataIt = this.columnMetaDataList.iterator();
+        for (ColumnMetaData colMetaData : this.columnMetaDataList) {
-        while (colMetaDataIt.hasNext()) {
-            ColumnMetaData colMetaData = colMetaDataIt.next();
             if (colMetaData.getColName() != null && colMetaData.getColName().equalsIgnoreCase(columnLabel)) {
                 return colMetaData.getColIndex() + 1;
             }
         }
-        throw new SQLException(TSDBConstants.INVALID_VARIABLES);
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_VARIABLE);
     }
 
-    public Reader getCharacterStream(int columnIndex) throws SQLException {
+    @Override
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Reader getCharacterStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    /*
-     * used by spark
-     */
     public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
         int colIndex = getTrueColumnIndex(columnIndex);
 
@@ -513,403 +311,111 @@ public class TSDBResultSet implements ResultSet {
         }
     }
 
-    public BigDecimal getBigDecimal(String columnLabel) throws SQLException {
+    @Override
-        return this.getBigDecimal(this.findColumn(columnLabel));
-    }
-
     public boolean isBeforeFirst() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean isAfterLast() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean isFirst() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean isLast() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public void beforeFirst() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public void afterLast() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean first() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean last() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public int getRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean absolute(int row) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean relative(int rows) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
+
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
     }
 
+    @Override
     public boolean previous() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
-    }
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
 
-    public void setFetchDirection(int direction) throws SQLException {
+        throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_UNSUPPORTED_METHOD);
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getFetchDirection() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void setFetchSize(int rows) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getFetchSize() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getType() throws SQLException {
-        return ResultSet.TYPE_FORWARD_ONLY;
-    }
-
-    public int getConcurrency() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean rowUpdated() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean rowInserted() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean rowDeleted() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNull(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBoolean(int columnIndex, boolean x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateByte(int columnIndex, byte x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateShort(int columnIndex, short x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateInt(int columnIndex, int x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateLong(int columnIndex, long x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateFloat(int columnIndex, float x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateDouble(int columnIndex, double x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBigDecimal(int columnIndex, BigDecimal x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateString(int columnIndex, String x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBytes(int columnIndex, byte[] x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateDate(int columnIndex, Date x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateTime(int columnIndex, Time x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateTimestamp(int columnIndex, Timestamp x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(int columnIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(int columnIndex, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(int columnIndex, Reader x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateObject(int columnIndex, Object x, int scaleOrLength) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateObject(int columnIndex, Object x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNull(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBoolean(String columnLabel, boolean x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateByte(String columnLabel, byte x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateShort(String columnLabel, short x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateInt(String columnLabel, int x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateLong(String columnLabel, long x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateFloat(String columnLabel, float x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateDouble(String columnLabel, double x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBigDecimal(String columnLabel, BigDecimal x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateString(String columnLabel, String x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBytes(String columnLabel, byte[] x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateDate(String columnLabel, Date x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateTime(String columnLabel, Time x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateTimestamp(String columnLabel, Timestamp x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(String columnLabel, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(String columnLabel, InputStream x, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(String columnLabel, Reader reader, int length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateObject(String columnLabel, Object x, int scaleOrLength) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateObject(String columnLabel, Object x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void insertRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void deleteRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void refreshRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void cancelRowUpdates() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void moveToInsertRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void moveToCurrentRow() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
     }
 
     public Statement getStatement() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (isClosed())
-    }
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_RESULTSET_CLOSED);
 
-    public Object getObject(int columnIndex, Map<String, Class<?>> map) throws SQLException {
+        return this.statement;
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Ref getRef(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Blob getBlob(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Clob getClob(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Array getArray(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Object getObject(String columnLabel, Map<String, Class<?>> map) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Ref getRef(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Blob getBlob(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Clob getClob(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Array getArray(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Date getDate(int columnIndex, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Date getDate(String columnLabel, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Time getTime(int columnIndex, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Time getTime(String columnLabel, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Timestamp getTimestamp(int columnIndex, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Timestamp getTimestamp(String columnLabel, Calendar cal) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public URL getURL(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public URL getURL(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateRef(int columnIndex, Ref x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateRef(String columnLabel, Ref x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(int columnIndex, Blob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(String columnLabel, Blob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(int columnIndex, Clob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(String columnLabel, Clob x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateArray(int columnIndex, Array x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateArray(String columnLabel, Array x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public RowId getRowId(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public RowId getRowId(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateRowId(int columnIndex, RowId x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateRowId(String columnLabel, RowId x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getHoldability() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
     }
 
     public boolean isClosed() throws SQLException {
+        //TODO: check if need release resources
         boolean isClosed = true;
         if (jniConnector != null) {
             isClosed = jniConnector.isResultsetClosed();
@@ -917,183 +423,11 @@ public class TSDBResultSet implements ResultSet {
         return isClosed;
     }
 
-    public void updateNString(int columnIndex, String nString) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNString(String columnLabel, String nString) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(int columnIndex, NClob nClob) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(String columnLabel, NClob nClob) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public NClob getNClob(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public NClob getNClob(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public SQLXML getSQLXML(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public SQLXML getSQLXML(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateSQLXML(int columnIndex, SQLXML xmlObject) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateSQLXML(String columnLabel, SQLXML xmlObject) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     public String getNString(int columnIndex) throws SQLException {
         int colIndex = getTrueColumnIndex(columnIndex);
         return (String) rowData.get(colIndex);
     }
 
-    public String getNString(String columnLabel) throws SQLException {
-        return (String) this.getString(columnLabel);
-    }
-
-    public Reader getNCharacterStream(int columnIndex) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public Reader getNCharacterStream(String columnLabel) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(int columnIndex, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(int columnIndex, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(int columnIndex, Reader x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(String columnLabel, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(String columnLabel, InputStream x, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(String columnLabel, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(int columnIndex, InputStream inputStream, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(String columnLabel, InputStream inputStream, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(int columnIndex, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(String columnLabel, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(int columnIndex, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(String columnLabel, Reader reader, long length) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNCharacterStream(int columnIndex, Reader x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNCharacterStream(String columnLabel, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(int columnIndex, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(int columnIndex, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(int columnIndex, Reader x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateAsciiStream(String columnLabel, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBinaryStream(String columnLabel, InputStream x) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateCharacterStream(String columnLabel, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(int columnIndex, InputStream inputStream) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateBlob(String columnLabel, InputStream inputStream) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(int columnIndex, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateClob(String columnLabel, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(int columnIndex, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void updateNClob(String columnLabel, Reader reader) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public <T> T getObject(String columnLabel, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     private int getTrueColumnIndex(int columnIndex) throws SQLException {
         if (columnIndex < this.COLUMN_INDEX_START_VALUE) {
             throw new SQLException("Column Index out of range, " + columnIndex + " < " + this.COLUMN_INDEX_START_VALUE);
@@ -1103,7 +437,6 @@ public class TSDBResultSet implements ResultSet {
         if (columnIndex > numOfCols) {
             throw new SQLException("Column Index out of range, " + columnIndex + " > " + numOfCols);
         }
-
         return columnIndex - 1;
     }
 }

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

@@ -29,11 +29,11 @@ public class TSDBResultSetMetaData implements ResultSetMetaData {
 	}
 
 	public <T> T unwrap(Class<T> iface) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public boolean isWrapperFor(Class<?> iface) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public int getColumnCount() throws SQLException {
@@ -94,7 +94,7 @@ public class TSDBResultSetMetaData implements ResultSetMetaData {
 	}
 
 	public String getSchemaName(int column) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public int getPrecision(int column) throws SQLException {
@@ -125,11 +125,11 @@ public class TSDBResultSetMetaData implements ResultSetMetaData {
 	}
 
 	public String getTableName(int column) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public String getCatalogName(int column) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public int getColumnType(int column) throws SQLException {
@@ -173,7 +173,7 @@ public class TSDBResultSetMetaData implements ResultSetMetaData {
 	}
 
 	public boolean isDefinitelyWritable(int column) throws SQLException {
-		throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+		throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
 	}
 
 	public String getColumnClassName(int column) throws SQLException {

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

@@ -1153,11 +1153,11 @@ public class TSDBResultSetWrapper implements ResultSet {
     }
 
     public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     public <T> T getObject(String columnLabel, Class<T> type) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override

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

@@ -14,34 +14,24 @@
  *****************************************************************************/
 package com.taosdata.jdbc;
 
-import com.taosdata.jdbc.utils.TaosInfo;
-
 import java.sql.*;
 import java.util.ArrayList;
 import java.util.List;
 
-public class TSDBStatement implements Statement {
+public class TSDBStatement extends AbstractStatement {
-    private TSDBJNIConnector connector;
 
+    private TSDBJNIConnector connector;
     /**
      * To store batched commands
      */
     protected List<String> batchedArgs;
-
-    /**
-     * Timeout for a query
-     */
-    protected int queryTimeout = 0;
-
-    private Long pSql = 0l;
-
     /**
      * Status of current statement
      */
-    private boolean isClosed = true;
+    private boolean isClosed;
-    private int affectedRows = 0;
+    private int affectedRows = -1;
-
     private TSDBConnection connection;
+    private TSDBResultSet resultSet;
 
     public void setConnection(TSDBConnection connection) {
         this.connection = connection;
@@ -50,220 +40,89 @@ public class TSDBStatement implements Statement {
     TSDBStatement(TSDBConnection connection, TSDBJNIConnector connector) {
         this.connection = connection;
         this.connector = connector;
-        this.isClosed = false;
-    }
-
-    @Override
-    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());
-        }
-    }
-
-    @Override
-    public boolean isWrapperFor(Class<?> iface) throws SQLException {
-        return iface.isInstance(this);
     }
 
     public ResultSet executeQuery(String sql) throws SQLException {
-        if (isClosed()) {
+        // check if closed
+        if (isClosed())
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
+        //TODO: 如果在executeQuery方法中执行insert语句，那么先执行了SQL，再通过pSql来检查是否为一个insert语句，但这个insert SQL已经执行成功了
 
-        // TODO make sure it is not a update query
+        // execute query
-        pSql = this.connector.executeQuery(sql);
+        long pSql = this.connector.executeQuery(sql);
-        long resultSetPointer = this.connector.getResultSet();
+        // if pSql is create/insert/update/delete/alter SQL
-        if (resultSetPointer == TSDBConstants.JNI_CONNECTION_NULL) {
+        if (this.connector.isUpdateQuery(pSql)) {
             this.connector.freeResultSet(pSql);
-            throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_CONNECTION_NULL));
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_WITH_EXECUTEQUERY);
-        }
-
-        // create/insert/update/delete/alter
-        if (resultSetPointer == TSDBConstants.JNI_NULL_POINTER) {
-            this.connector.freeResultSet(pSql);
-            return null;
-        }
-
-        if (!this.connector.isUpdateQuery(pSql)) {
-            TSDBResultSet res = new TSDBResultSet(this.connector, resultSetPointer);
-            res.setBatchFetch(this.connection.getBatchFetch());
-            return res;
-        } else {
-            this.connector.freeResultSet(pSql);
-            return null;
         }
 
+        TSDBResultSet res = new TSDBResultSet(this, this.connector, pSql);
+        res.setBatchFetch(this.connection.getBatchFetch());
+        return res;
     }
 
     public int executeUpdate(String sql) throws SQLException {
-        if (isClosed()) {
+        if (isClosed())
             throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
 
-        // TODO check if current query is update query
+        long pSql = this.connector.executeQuery(sql);
-        pSql = this.connector.executeQuery(sql);
+        // if pSql is create/insert/update/delete/alter SQL
-        long resultSetPointer = this.connector.getResultSet();
+        if (!this.connector.isUpdateQuery(pSql)) {
-
-        if (resultSetPointer == TSDBConstants.JNI_CONNECTION_NULL) {
             this.connector.freeResultSet(pSql);
-            throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_CONNECTION_NULL));
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_INVALID_WITH_EXECUTEUPDATE);
         }
-
+        int affectedRows = this.connector.getAffectedRows(pSql);
-        this.affectedRows = this.connector.getAffectedRows(pSql);
         this.connector.freeResultSet(pSql);
-
+        return affectedRows;
-        return this.affectedRows;
-    }
-
-    public String getErrorMsg(long pSql) {
-        return this.connector.getErrMsg(pSql);
     }
 
     public void close() throws SQLException {
         if (!isClosed) {
-            if (!this.connector.isResultsetClosed()) {
+            if (this.resultSet != null)
-                this.connector.freeResultSet();
+                this.resultSet.close();
-            }
             isClosed = true;
         }
     }
 
-    public int getMaxFieldSize() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
-
-        return 0;
-    }
-
-    public void setMaxFieldSize(int max) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
-
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getMaxRows() throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
-        // always set maxRows to zero, meaning unlimitted rows in a resultSet
-        return 0;
-    }
-
-    public void setMaxRows(int max) throws SQLException {
-        if (isClosed()) {
-            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
-        // always set maxRows to zero, meaning unlimited rows in a resultSet
-    }
-
-    public void setEscapeProcessing(boolean enable) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getQueryTimeout() throws SQLException {
-        return queryTimeout;
-    }
-
-    public void setQueryTimeout(int seconds) throws SQLException {
-        this.queryTimeout = seconds;
-    }
-
-    public void cancel() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public SQLWarning getWarnings() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void clearWarnings() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void setCursorName(String name) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     public boolean execute(String sql) throws SQLException {
-        if (isClosed) {
+        // check if closed
-            throw new SQLException("Invalid method call on a closed statement.");
+        if (isClosed())
-        }
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        boolean res = true;
+        // execute query
-        pSql = this.connector.executeQuery(sql);
+        long pSql = this.connector.executeQuery(sql);
-        long resultSetPointer = this.connector.getResultSet();
+        // if pSql is create/insert/update/delete/alter SQL
-
+        if (this.connector.isUpdateQuery(pSql)) {
-        if (resultSetPointer == TSDBConstants.JNI_CONNECTION_NULL) {
+            this.affectedRows = this.connector.getAffectedRows(pSql);
             this.connector.freeResultSet(pSql);
-            throw new SQLException(TSDBConstants.FixErrMsg(TSDBConstants.JNI_CONNECTION_NULL));
+            return false;
-        } else if (resultSetPointer == TSDBConstants.JNI_NULL_POINTER) {
-            // no result set is retrieved
-            this.connector.freeResultSet(pSql);
-            res = false;
         }
 
-        return res;
+        this.resultSet = new TSDBResultSet(this, this.connector, pSql);
+        this.resultSet.setBatchFetch(this.connection.getBatchFetch());
+        return true;
     }
 
     public ResultSet getResultSet() throws SQLException {
-        if (isClosed) {
+        if (isClosed())
-            throw new SQLException("Invalid method call on a closed statement.");
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
+//        long resultSetPointer = connector.getResultSet();
-        long resultSetPointer = connector.getResultSet();
+//        TSDBResultSet resSet = null;
-        TSDBResultSet resSet = null;
+//        if (resultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
-        if (resultSetPointer != TSDBConstants.JNI_NULL_POINTER) {
+//            resSet = new TSDBResultSet(connector, resultSetPointer);
-            resSet = new TSDBResultSet(connector, resultSetPointer);
+//        }
-        }
+        return this.resultSet;
-        return resSet;
     }
 
     public int getUpdateCount() throws SQLException {
-        if (isClosed) {
+        if (isClosed())
-            throw new SQLException("Invalid method call on a closed statement.");
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
-
         return this.affectedRows;
     }
 
-    public boolean getMoreResults() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void setFetchDirection(int direction) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getFetchDirection() throws SQLException {
-        return ResultSet.FETCH_FORWARD;
-//        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    /*
-     * used by spark
-     */
-    public void setFetchSize(int rows) throws SQLException {
-    }
-
-    /*
-     * used by spark
-     */
-    public int getFetchSize() throws SQLException {
-        return 4096;
-    }
-
-    public int getResultSetConcurrency() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getResultSetType() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     public void addBatch(String sql) throws SQLException {
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+
         if (batchedArgs == null) {
             batchedArgs = new ArrayList<>();
         }
@@ -271,83 +130,41 @@ public class TSDBStatement implements Statement {
     }
 
     public void clearBatch() throws SQLException {
-        batchedArgs.clear();
+        if (isClosed())
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
+        if (batchedArgs != null)
+            batchedArgs.clear();
     }
 
     public int[] executeBatch() throws SQLException {
-        if (isClosed) {
+        if (isClosed())
-            throw new SQLException("Invalid method call on a closed statement.");
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        }
+        if (batchedArgs == null || batchedArgs.isEmpty())
-        if (batchedArgs == null) {
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_BATCH_IS_EMPTY);
-            throw new SQLException(TSDBConstants.WrapErrMsg("Batch is empty!"));
+
-        } else {
+        int[] res = new int[batchedArgs.size()];
-            int[] res = new int[batchedArgs.size()];
+        for (int i = 0; i < batchedArgs.size(); i++) {
-            for (int i = 0; i < batchedArgs.size(); i++) {
+            boolean isSelect = execute(batchedArgs.get(i));
-                res[i] = executeUpdate(batchedArgs.get(i));
+            if (isSelect) {
+                res[i] = SUCCESS_NO_INFO;
+            } else {
+                res[i] = getUpdateCount();
             }
-            return res;
         }
+        return res;
     }
 
     public Connection getConnection() throws SQLException {
-        if (this.connector != null)
+        if (isClosed())
-            return this.connection;
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_STATEMENT_CLOSED);
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        if (this.connector == null)
-    }
+            throw TSDBError.createSQLException(TSDBErrorNumbers.ERROR_JNI_CONNECTION_NULL);
-
+        return this.connection;
-    public boolean getMoreResults(int current) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public ResultSet getGeneratedKeys() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean execute(String sql, String[] columnNames) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public int getResultSetHoldability() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
     }
 
     public boolean isClosed() throws SQLException {
         return isClosed;
     }
 
-    public void setPoolable(boolean poolable) throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
 
-    public boolean isPoolable() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public void closeOnCompletion() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    public boolean isCloseOnCompletion() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
 }

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

@@ -50,7 +50,7 @@ public class TSDBSubscribe {
         } else if (resultSetPointer == TSDBConstants.JNI_NULL_POINTER) {
             return null;
         } else {
-            return new TSDBResultSet(this.connecter, resultSetPointer);
+            return new TSDBResultSet(null, this.connecter, resultSetPointer);
         }
     }
 

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

@@ -0,0 +1,21 @@
+package com.taosdata.jdbc;
+
+import java.sql.SQLException;
+import java.sql.Wrapper;
+
+public class WrapperImpl implements Wrapper {
+
+    @Override
+    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());
+        }
+    }
+
+    @Override
+    public boolean isWrapperFor(Class<?> iface) throws SQLException {
+        return iface.isInstance(this);
+    }
+}

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulConnection.java

@@ -47,7 +47,7 @@ public class RestfulConnection implements Connection {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
         //TODO: prepareStatement
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -55,7 +55,7 @@ public class RestfulConnection implements Connection {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
 
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -72,7 +72,7 @@ public class RestfulConnection implements Connection {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
         if (!autoCommit)
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -162,7 +162,7 @@ public class RestfulConnection implements Connection {
             case Connection.TRANSACTION_READ_COMMITTED:
             case Connection.TRANSACTION_REPEATABLE_READ:
             case Connection.TRANSACTION_SERIALIZABLE:
-                throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+                throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
             default:
                 throw new SQLException(TSDBConstants.INVALID_VARIABLES);
         }
@@ -197,10 +197,10 @@ public class RestfulConnection implements Connection {
             throw new SQLException(CONNECTION_IS_CLOSED);
 
         if (resultSetType != ResultSet.TYPE_FORWARD_ONLY) {
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
         }
         if (resultSetConcurrency != ResultSet.CONCUR_READ_ONLY)
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
         return createStatement();
     }
 
@@ -221,7 +221,7 @@ public class RestfulConnection implements Connection {
         if (resultSetType != ResultSet.TYPE_FORWARD_ONLY || resultSetConcurrency != ResultSet.CONCUR_READ_ONLY)
             throw new SQLFeatureNotSupportedException(TSDBConstants.INVALID_VARIABLES);
 
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -252,7 +252,7 @@ public class RestfulConnection implements Connection {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
         if (holdability != ResultSet.HOLD_CURSORS_OVER_COMMIT)
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -269,7 +269,7 @@ public class RestfulConnection implements Connection {
         if (getAutoCommit())
             throw new SQLException(TSDBConstants.INVALID_VARIABLES);
         //nothing to do
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -279,7 +279,7 @@ public class RestfulConnection implements Connection {
         if (getAutoCommit())
             throw new SQLException(TSDBConstants.INVALID_VARIABLES);
         //nothing to do
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -289,68 +289,68 @@ public class RestfulConnection implements Connection {
         if (getAutoCommit())
             throw new SQLException(TSDBConstants.INVALID_VARIABLES);
         //nothing to do
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public void releaseSavepoint(Savepoint savepoint) throws SQLException {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Statement createStatement(int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
         if (resultSetHoldability != ResultSet.HOLD_CURSORS_OVER_COMMIT)
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
         return createStatement(resultSetType, resultSetConcurrency);
     }
 
     @Override
     public PreparedStatement prepareStatement(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
         if (resultSetHoldability != ResultSet.HOLD_CURSORS_OVER_COMMIT)
-            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+            throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
         return prepareStatement(sql, resultSetType, resultSetConcurrency);
     }
 
     @Override
     public CallableStatement prepareCall(String sql, int resultSetType, int resultSetConcurrency, int resultSetHoldability) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public PreparedStatement prepareStatement(String sql, int autoGeneratedKeys) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public PreparedStatement prepareStatement(String sql, int[] columnIndexes) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public PreparedStatement prepareStatement(String sql, String[] columnNames) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Clob createClob() throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Blob createBlob() throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public NClob createNClob() throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public SQLXML createSQLXML() throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -399,12 +399,12 @@ public class RestfulConnection implements Connection {
 
     @Override
     public Array createArrayOf(String typeName, Object[] elements) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
     public Struct createStruct(String typeName, Object[] attributes) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override
@@ -442,7 +442,7 @@ public class RestfulConnection implements Connection {
     public void setNetworkTimeout(Executor executor, int milliseconds) throws SQLException {
         if (isClosed())
             throw new SQLException(CONNECTION_IS_CLOSED);
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
+        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORTED_METHOD_EXCEPTION_MSG);
     }
 
     @Override

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulDriver.java

@@ -2,7 +2,7 @@ package com.taosdata.jdbc.rs;
 
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
-import com.taosdata.jdbc.AbstractTaosDriver;
+import com.taosdata.jdbc.AbstractDriver;
 import com.taosdata.jdbc.TSDBConstants;
 import com.taosdata.jdbc.TSDBDriver;
 import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
@@ -11,7 +11,7 @@ import java.sql.*;
 import java.util.Properties;
 import java.util.logging.Logger;
 
-public class RestfulDriver extends AbstractTaosDriver {
+public class RestfulDriver extends AbstractDriver {
 
     private static final String URL_PREFIX = "jdbc:TAOS-RS://";
 

src/connector/jdbc/src/main/java/com/taosdata/jdbc/rs/RestfulStatement.java

@@ -2,6 +2,7 @@ package com.taosdata.jdbc.rs;
 
 import com.alibaba.fastjson.JSON;
 import com.alibaba.fastjson.JSONObject;
+import com.taosdata.jdbc.AbstractStatement;
 import com.taosdata.jdbc.TSDBConstants;
 import com.taosdata.jdbc.rs.util.HttpClientPoolUtil;
 import com.taosdata.jdbc.utils.SqlSyntaxValidator;
@@ -12,7 +13,7 @@ import java.util.Arrays;
 import java.util.List;
 import java.util.stream.Collectors;
 
-public class RestfulStatement implements Statement {
+public class RestfulStatement extends AbstractStatement {
 
     private boolean closed;
     private String database;
@@ -20,7 +21,6 @@ public class RestfulStatement implements Statement {
 
     private volatile RestfulResultSet resultSet;
     private volatile int affectedRows;
-    private volatile boolean closeOnCompletion;
 
     public RestfulStatement(RestfulConnection conn, String database) {
         this.conn = conn;
@@ -104,85 +104,6 @@ public class RestfulStatement implements Statement {
         }
     }
 
-    @Override
-    public int getMaxFieldSize() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return TSDBConstants.maxFieldSize;
-    }
-
-    @Override
-    public void setMaxFieldSize(int max) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        if (max < 0)
-            throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-        // nothing to do
-    }
-
-    @Override
-    public int getMaxRows() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return 0;
-    }
-
-    @Override
-    public void setMaxRows(int max) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        if (max < 0)
-            throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-        // nothing to do
-    }
-
-    @Override
-    public void setEscapeProcessing(boolean enable) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-    }
-
-    @Override
-    public int getQueryTimeout() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return 0;
-    }
-
-    @Override
-    public void setQueryTimeout(int seconds) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        if (seconds < 0)
-            throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-    }
-
-    @Override
-    public void cancel() throws SQLException {
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public SQLWarning getWarnings() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return null;
-    }
-
-    @Override
-    public void clearWarnings() throws SQLException {
-        // nothing to do
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-    }
-
-    @Override
-    public void setCursorName(String name) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        throw new SQLException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
     @Override
     public boolean execute(String sql) throws SQLException {
         if (isClosed())
@@ -271,53 +192,6 @@ public class RestfulStatement implements Statement {
         return this.affectedRows;
     }
 
-    @Override
-    public boolean getMoreResults() throws SQLException {
-        return getMoreResults(CLOSE_CURRENT_RESULT);
-    }
-
-    @Override
-    public void setFetchDirection(int direction) throws SQLException {
-        if (direction != ResultSet.FETCH_FORWARD && direction != ResultSet.FETCH_REVERSE && direction != ResultSet.FETCH_UNKNOWN)
-            throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-        this.resultSet.setFetchDirection(direction);
-    }
-
-    @Override
-    public int getFetchDirection() throws SQLException {
-        return this.resultSet.getFetchDirection();
-    }
-
-    @Override
-    public void setFetchSize(int rows) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        if (rows < 0)
-            throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-        //nothing to do
-    }
-
-    @Override
-    public int getFetchSize() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return 0;
-    }
-
-    @Override
-    public int getResultSetConcurrency() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return this.resultSet.getConcurrency();
-    }
-
-    @Override
-    public int getResultSetType() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return this.resultSet.getType();
-    }
-
     @Override
     public void addBatch(String sql) throws SQLException {
         if (isClosed())
@@ -343,115 +217,10 @@ public class RestfulStatement implements Statement {
         return this.conn;
     }
 
-    @Override
-    public boolean getMoreResults(int current) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        if (resultSet == null)
-            return false;
-
-//        switch (current) {
-//            case CLOSE_CURRENT_RESULT:
-//                resultSet.close();
-//                break;
-//            case KEEP_CURRENT_RESULT:
-//                break;
-//            case CLOSE_ALL_RESULTS:
-//                resultSet.close();
-//                break;
-//            default:
-//                throw new SQLException(TSDBConstants.INVALID_VARIABLES);
-//        }
-//        return next;
-        return false;
-    }
-
-    @Override
-    public ResultSet getGeneratedKeys() throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public int executeUpdate(String sql, int autoGeneratedKeys) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public int executeUpdate(String sql, int[] columnIndexes) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public int executeUpdate(String sql, String[] columnNames) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public boolean execute(String sql, int autoGeneratedKeys) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public boolean execute(String sql, int[] columnIndexes) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public boolean execute(String sql, String[] columnNames) throws SQLException {
-        throw new SQLFeatureNotSupportedException(TSDBConstants.UNSUPPORT_METHOD_EXCEPTIONZ_MSG);
-    }
-
-    @Override
-    public int getResultSetHoldability() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return this.resultSet.getHoldability();
-    }
-
     @Override
     public boolean isClosed() throws SQLException {
         return closed;
     }
 
-    @Override
-    public void setPoolable(boolean poolable) throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        //nothing to do
-    }
 
-    @Override
-    public boolean isPoolable() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return false;
-    }
-
-    @Override
-    public void closeOnCompletion() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        this.closeOnCompletion = true;
-    }
-
-    @Override
-    public boolean isCloseOnCompletion() throws SQLException {
-        if (isClosed())
-            throw new SQLException(TSDBConstants.STATEMENT_CLOSED);
-        return this.closeOnCompletion;
-    }
-
-    @Override
-    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());
-        }
-    }
-
-    @Override
-    public boolean isWrapperFor(Class<?> iface) throws SQLException {
-        return iface.isInstance(this);
-    }
 }

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

@@ -7,6 +7,7 @@ import org.junit.Test;
 
 import javax.sql.rowset.serial.SerialBlob;
 import javax.sql.rowset.serial.SerialClob;
+import java.io.UnsupportedEncodingException;
 import java.sql.*;
 import java.util.HashMap;
 import java.util.Properties;
@@ -39,7 +40,6 @@ public class ResultSetTest {
         } catch (ClassNotFoundException | SQLException e) {
             return;
         }
-
     }
 
     @Test
@@ -54,51 +54,38 @@ public class ResultSetTest {
         short v6 = 12;
         boolean v7 = false;
         String v8 = "TDengine is powerful";
-
         sql = "insert into " + dbName + "." + tName + " values (" + ts + "," + v1 + "," + v2 + "," + v3 + "," + v4
                 + ",\"" + v5 + "\"," + v6 + "," + v7 + ",\"" + v8 + "\")";
-
         try {
             statement.executeUpdate(sql);
             assertEquals(1, statement.getUpdateCount());
         } catch (SQLException e) {
             assert false : "insert error " + e.getMessage();
         }
-
         try {
-            statement.executeQuery("select * from " + dbName + "." + tName + " where ts = " + ts);
+            statement.execute("select * from " + dbName + "." + tName + " where ts = " + ts);
             resSet = statement.getResultSet();
             System.out.println(((TSDBResultSet) resSet).getRowData());
             while (resSet.next()) {
                 assertEquals(ts, resSet.getLong(1));
                 assertEquals(ts, resSet.getLong("ts"));
-
                 System.out.println(resSet.getTimestamp(1));
-
                 assertEquals(v1, resSet.getInt(2));
                 assertEquals(v1, resSet.getInt("k1"));
-
                 assertEquals(v2, resSet.getLong(3));
                 assertEquals(v2, resSet.getLong("k2"));
-
                 assertEquals(v3, resSet.getFloat(4), 7);
                 assertEquals(v3, resSet.getFloat("k3"), 7);
-
                 assertEquals(v4, resSet.getDouble(5), 13);
                 assertEquals(v4, resSet.getDouble("k4"), 13);
-
                 assertEquals(v5, resSet.getString(6));
                 assertEquals(v5, resSet.getString("k5"));
-
                 assertEquals(v6, resSet.getShort(7));
                 assertEquals(v6, resSet.getShort("k6"));
-
                 assertEquals(v7, resSet.getBoolean(8));
                 assertEquals(v7, resSet.getBoolean("k7"));
-
                 assertEquals(v8, resSet.getString(9));
                 assertEquals(v8, resSet.getString("k8"));
-
                 resSet.getBytes(9);
                 resSet.getObject(6);
                 resSet.getObject("k8");
@@ -111,684 +98,145 @@ public class ResultSetTest {
         }
     }
 
-    @Test
+    @Test(expected = SQLException.class)
-    public void testUnsupport() throws SQLException {
+    public void testUnsupport() throws SQLException, UnsupportedEncodingException {
-        statement.executeQuery("show databases");
+        statement.execute("show databases");
         resSet = statement.getResultSet();
         Assert.assertNotNull(resSet.unwrap(TSDBResultSet.class));
         Assert.assertTrue(resSet.isWrapperFor(TSDBResultSet.class));
-        try {
+        resSet.getUnicodeStream(null);
-            resSet.getAsciiStream(0);
+        resSet.getBinaryStream(null);
-        } catch (SQLException e) {
+        resSet.getAsciiStream("");
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getUnicodeStream(null);
-        }
+        resSet.getBinaryStream(null);
-        try {
+        resSet.getWarnings();
-            resSet.getUnicodeStream(null);
+        resSet.clearWarnings();
-        } catch (SQLException e) {
+        resSet.getCursorName();
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getCharacterStream(null);
-        }
+        resSet.getCharacterStream(null);
-        try {
+        resSet.isBeforeFirst();
-            resSet.getBinaryStream(null);
+        resSet.isAfterLast();
-        } catch (SQLException e) {
+        resSet.isFirst();
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.isLast();
-        }
+        resSet.beforeFirst();
-        try {
+        resSet.afterLast();
-            resSet.getAsciiStream("");
+        resSet.first();
-        } catch (SQLException e) {
+        resSet.last();
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getRow();
-        }
+        resSet.absolute(1);
-        try {
+        resSet.relative(1);
-            resSet.getUnicodeStream(null);
+        resSet.previous();
-        } catch (SQLException e) {
+        resSet.setFetchDirection(0);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getFetchDirection();
-        }
+        resSet.setFetchSize(0);
-        try {
+        resSet.getFetchSize();
-            resSet.getBinaryStream(null);
+        resSet.getConcurrency();
-        } catch (SQLException e) {
+        resSet.rowUpdated();
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.rowInserted();
-        }
+        resSet.rowDeleted();
-        try {
+        resSet.updateNull(null);
-            resSet.getWarnings();
+        resSet.updateBoolean(0, true);
-        } catch (SQLException e) {
+        resSet.updateByte(0, (byte) 2);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateShort(0, (short) 1);
-        }
+        resSet.updateInt(0, 0);
-        try {
+        resSet.updateLong(0, 0l);
-            resSet.clearWarnings();
+        resSet.updateFloat(0, 3.14f);
-        } catch (SQLException e) {
+        resSet.updateDouble(0, 3.1415);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateBigDecimal(null, null);
-        }
+        resSet.updateString(null, null);
-        try {
+        resSet.updateBytes(null, null);
-            resSet.getCursorName();
+        resSet.updateDate(null, null);
-        } catch (SQLException e) {
+        resSet.updateTime(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateTimestamp(null, null);
-        }
+        resSet.updateAsciiStream(null, null);
-        try {
+        resSet.updateBinaryStream(null, null);
-            resSet.getCharacterStream(null);
+        resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
+        resSet.updateObject(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateObject(null, null);
-        }
+        resSet.updateNull(null);
-        try {
+        resSet.updateBoolean("", false);
-            resSet.getCharacterStream(null);
+        resSet.updateByte("", (byte) 1);
-        } catch (SQLException e) {
+        resSet.updateShort("", (short) 1);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateInt("", 0);
-        }
+        resSet.updateLong("", 0l);
-        try {
+        resSet.updateFloat("", 3.14f);
-            resSet.isBeforeFirst();
+        resSet.updateDouble("", 3.1415);
-        } catch (SQLException e) {
+        resSet.updateBigDecimal(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateString(null, null);
-        }
+        resSet.updateBytes(null, null);
-        try {
+        resSet.updateDate(null, null);
-            resSet.isAfterLast();
+        resSet.updateTime(null, null);
-        } catch (SQLException e) {
+        resSet.updateTimestamp(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateAsciiStream(null, null);
-        }
+        resSet.updateBinaryStream(null, null);
-        try {
+        resSet.updateCharacterStream(null, null);
-            resSet.isFirst();
+        resSet.updateObject(null, null);
-        } catch (SQLException e) {
+        resSet.updateObject(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.insertRow();
-        }
+        resSet.updateRow();
-        try {
+        resSet.deleteRow();
-            resSet.isLast();
+        resSet.refreshRow();
-        } catch (SQLException e) {
+        resSet.cancelRowUpdates();
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.moveToInsertRow();
-        }
+        resSet.moveToCurrentRow();
-        try {
+        resSet.getStatement();
-            resSet.beforeFirst();
+        resSet.getObject(0, new HashMap<>());
-        } catch (SQLException e) {
+        resSet.getRef(null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getBlob(null);
-        }
+        resSet.getClob(null);
-        try {
+        resSet.getArray(null);
-            resSet.afterLast();
+        resSet.getObject("", new HashMap<>());
-        } catch (SQLException e) {
+        resSet.getRef(null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getBlob(null);
-        }
+        resSet.getClob(null);
-        try {
+        resSet.getArray(null);
-            resSet.first();
+        resSet.getDate(null, null);
-        } catch (SQLException e) {
+        resSet.getDate(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getTime(null, null);
-        }
+        resSet.getTime(null, null);
-        try {
+        resSet.getTimestamp(null, null);
-            resSet.last();
+        resSet.getTimestamp(null, null);
-        } catch (SQLException e) {
+        resSet.getURL(null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getURL(null);
-        }
+        resSet.updateRef(null, null);
-        try {
+        resSet.updateRef(null, null);
-            resSet.getRow();
+        resSet.updateBlob(0, new SerialBlob("".getBytes("UTF8")));
-        } catch (SQLException e) {
+        resSet.updateBlob("", new SerialBlob("".getBytes("UTF8")));
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateClob("", new SerialClob("".toCharArray()));
-        }
+        resSet.updateClob(0, new SerialClob("".toCharArray()));
-        try {
+        resSet.updateArray(null, null);
-            resSet.absolute(1);
+        resSet.updateArray(null, null);
-        } catch (SQLException e) {
+        resSet.getRowId(null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.getRowId(null);
-        }
+        resSet.updateRowId(null, null);
-        try {
+        resSet.updateRowId(null, null);
-            resSet.relative(1);
+        resSet.getHoldability();
-        } catch (SQLException e) {
+        resSet.updateNString(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateNString(null, null);
-        }
+        resSet.getNClob(null);
-        try {
+        resSet.getNClob(null);
-            resSet.previous();
+        resSet.getSQLXML(null);
-        } catch (SQLException e) {
+        resSet.getSQLXML(null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateSQLXML(null, null);
-        }
+        resSet.updateSQLXML(null, null);
-        try {
+        resSet.getNCharacterStream(null);
-            resSet.setFetchDirection(0);
+        resSet.getNCharacterStream(null);
-        } catch (SQLException e) {
+        resSet.updateNCharacterStream(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateNCharacterStream(null, null);
-        }
+        resSet.updateAsciiStream(null, null);
-        try {
+        resSet.updateBinaryStream(null, null);
-            resSet.getFetchDirection();
+        resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
+        resSet.updateAsciiStream(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateBinaryStream(null, null);
-        }
+        resSet.updateCharacterStream(null, null);
-        try {
+        resSet.updateNCharacterStream(null, null);
-            resSet.setFetchSize(0);
+        resSet.updateNCharacterStream(null, null);
-        } catch (SQLException e) {
+        resSet.updateAsciiStream(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
+        resSet.updateBinaryStream(null, null);
-        }
+        resSet.updateCharacterStream(null, null);
-        try {
+        resSet.updateAsciiStream(null, null);
-            resSet.getFetchSize();
+        resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
+        resSet.updateCharacterStream(null, null);
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getConcurrency();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.rowUpdated();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.rowInserted();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.rowDeleted();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNull(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBoolean(0, true);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateByte(0, (byte) 2);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateShort(0, (short) 1);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateInt(0, 0);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateLong(0, 0l);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateFloat(0, 3.14f);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateDouble(0, 3.1415);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBigDecimal(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateString(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBytes(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateDate(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateTime(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateTimestamp(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateObject(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateObject(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNull(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBoolean("", false);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateByte("", (byte) 1);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateShort("", (short) 1);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateInt("", 0);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateLong("", 0l);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateFloat("", 3.14f);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateDouble("", 3.1415);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBigDecimal(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateString(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBytes(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateDate(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateTime(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateTimestamp(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateObject(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateObject(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.insertRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.deleteRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.refreshRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.cancelRowUpdates();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.moveToInsertRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.moveToCurrentRow();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getStatement();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getObject(0, new HashMap<>());
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getRef(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getBlob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getClob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getArray(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getObject("", new HashMap<>());
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getRef(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getBlob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getClob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getArray(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getDate(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getDate(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getTime(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getTime(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getTimestamp(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getTimestamp(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getURL(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getURL(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateRef(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateRef(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBlob(0, new SerialBlob("".getBytes("UTF8")));
-        } catch (Exception e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBlob("", new SerialBlob("".getBytes("UTF8")));
-        } catch (Exception e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateClob("", new SerialClob("".toCharArray()));
-        } catch (Exception e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateClob(0, new SerialClob("".toCharArray()));
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateArray(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateArray(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getRowId(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getRowId(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateRowId(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateRowId(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getHoldability();
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNString(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNString(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-
-        try {
-            resSet.getNClob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getNClob(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getSQLXML(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getSQLXML(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateSQLXML(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateSQLXML(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getNCharacterStream(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.getNCharacterStream(null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-
-        try {
-            resSet.updateNCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateNCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateAsciiStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateBinaryStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
-        try {
-            resSet.updateCharacterStream(null, null);
-        } catch (SQLException e) {
-            assertTrue(e.getMessage().contains("this operation is NOT supported currently!"));
-        }
     }
 
     @Test
@@ -816,5 +264,4 @@ public class ResultSetTest {
             e.printStackTrace();
         }
     }
-
 }

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

@@ -8,9 +8,6 @@ import org.junit.Test;
 import java.sql.*;
 import java.util.Properties;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
-
 public class StatementTest {
     static Connection connection = null;
     static Statement statement = null;
@@ -58,12 +55,12 @@ public class StatementTest {
         statement.executeUpdate("create database if not exists " + dbName);
         statement.executeUpdate("create table if not exists " + dbName + "." + tName + "(ts timestamp, k1 int)");
         statement.executeUpdate("insert into " + dbName + "." + tName + " values (" + ts + ", 1)");
-        statement.executeQuery("select * from " + dbName + "." + tName);
+        statement.execute("select * from " + dbName + "." + tName);
         ResultSet resultSet = statement.getResultSet();
-        assertTrue(null != resultSet);
+        Assert.assertNotNull(resultSet);
 
         boolean isClosed = statement.isClosed();
-        assertEquals(false, isClosed);
+        Assert.assertEquals(false, isClosed);
     }
 
     @Test(expected = SQLException.class)

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

@@ -9,13 +9,14 @@ import java.sql.DriverManager;
 import java.sql.SQLException;
 import java.sql.Statement;
 import java.util.Properties;
+import java.util.concurrent.TimeUnit;
 
 public class SubscribeTest {
     Connection connection;
     Statement statement;
     String dbName = "test";
     String tName = "t0";
-    String host = "localhost";
+    String host = "127.0.0.1";
     String topic = "test";
 
     @Before
@@ -23,15 +24,15 @@ public class SubscribeTest {
         try {
             Class.forName("com.taosdata.jdbc.TSDBDriver");
             Properties properties = new Properties();
-            properties.setProperty(TSDBDriver.PROPERTY_KEY_HOST, host);
             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");
             connection = DriverManager.getConnection("jdbc:TAOS://" + host + ":0/", properties);
 
             statement = connection.createStatement();
-            statement.executeUpdate("create database if not exists " + dbName);
+            statement.execute("drop database if exists " + dbName);
-            statement.executeUpdate("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
+            statement.execute("create database if not exists " + dbName);
+            statement.execute("create table if not exists " + dbName + "." + tName + " (ts timestamp, k int, v int)");
             long ts = System.currentTimeMillis();
             for (int i = 0; i < 2; i++) {
                 ts += i;
@@ -45,44 +46,40 @@ public class SubscribeTest {
     }
 
     @Test
-    public void subscribe() throws Exception {
+    public void subscribe() {
-        TSDBSubscribe subscribe = null;
         try {
 
             String rawSql = "select * from " + dbName + "." + tName + ";";
             System.out.println(rawSql);
-            subscribe = ((TSDBConnection) connection).subscribe(topic, rawSql, false);
+            TSDBSubscribe subscribe = ((TSDBConnection) connection).subscribe(topic, rawSql, false);
 
             int a = 0;
             while (true) {
-                Thread.sleep(900);
+                TimeUnit.MILLISECONDS.sleep(1000);
                 TSDBResultSet resSet = subscribe.consume();
-
                 while (resSet.next()) {
                     for (int i = 1; i <= resSet.getMetaData().getColumnCount(); i++) {
                         System.out.printf(i + ": " + resSet.getString(i) + "\t");
                     }
                     System.out.println("\n======" + a + "==========");
                 }
-                resSet.close();
                 a++;
                 if (a >= 2) {
                     break;
                 }
+//                resSet.close();
             }
+
+            subscribe.close(true);
         } catch (Exception e) {
             e.printStackTrace();
-        } finally {
-            if (null != subscribe) {
-                subscribe.close(true);
-            }
         }
     }
 
     @After
     public void close() {
         try {
-            statement.executeQuery("drop database " + dbName);
+            statement.execute("drop database " + dbName);
             if (statement != null)
                 statement.close();
             if (connection != null)

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

@@ -0,0 +1,234 @@
+package com.taosdata.jdbc;
+
+import org.junit.AfterClass;
+import org.junit.Assert;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Properties;
+import java.util.UUID;
+
+public class TSDBStatementTest {
+    private static final String host = "127.0.0.1";
+    private static Connection conn;
+    private static Statement stmt;
+
+    @Test
+    public void executeQuery() {
+        try {
+            ResultSet rs = stmt.executeQuery("show databases");
+            Assert.assertNotNull(rs);
+            ResultSetMetaData meta = rs.getMetaData();
+            while (rs.next()) {
+                for (int i = 1; i <= meta.getColumnCount(); i++) {
+                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
+                }
+                System.out.println();
+            }
+            rs.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void executeUpdate() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            int affectRows = stmt.executeUpdate("create database " + dbName);
+            Assert.assertEquals(0, affectRows);
+            affectRows = stmt.executeUpdate("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            Assert.assertEquals(0, affectRows);
+            affectRows = stmt.executeUpdate("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            Assert.assertEquals(1, affectRows);
+            affectRows = stmt.executeUpdate("drop database " + dbName);
+            Assert.assertEquals(0, affectRows);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void close() {
+    }
+
+    @Test
+    public void execute() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            boolean isSelect = stmt.execute("create database " + dbName);
+            Assert.assertEquals(false, isSelect);
+            int affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+
+            isSelect = stmt.execute("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+
+            isSelect = stmt.execute("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(1, affectedRows);
+
+            isSelect = stmt.execute("select * from " + dbName + ".weather");
+            Assert.assertEquals(true, isSelect);
+
+            isSelect = stmt.execute("drop database " + dbName);
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void getResultSet() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            boolean isSelect = stmt.execute("create database " + dbName);
+            Assert.assertEquals(false, isSelect);
+            int affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+
+            isSelect = stmt.execute("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+
+            isSelect = stmt.execute("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(1, affectedRows);
+
+            isSelect = stmt.execute("select * from " + dbName + ".weather");
+            Assert.assertEquals(true, isSelect);
+            ResultSet rs = stmt.getResultSet();
+            Assert.assertNotNull(rs);
+            ResultSetMetaData meta = rs.getMetaData();
+            Assert.assertEquals(3, meta.getColumnCount());
+            int count = 0;
+            while (rs.next()) {
+                for (int i = 1; i <= meta.getColumnCount(); i++) {
+                    System.out.print(meta.getColumnLabel(i) + ": " + rs.getString(i) + "\t");
+                }
+                System.out.println();
+                count++;
+            }
+            Assert.assertEquals(1, count);
+
+            isSelect = stmt.execute("drop database " + dbName);
+            Assert.assertEquals(false, isSelect);
+            affectedRows = stmt.getUpdateCount();
+            Assert.assertEquals(0, affectedRows);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void getUpdateCount() {
+        execute();
+    }
+
+    @Test
+    public void addBatch() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            stmt.addBatch("create database " + dbName);
+            stmt.addBatch("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            stmt.addBatch("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            stmt.addBatch("select * from " + dbName + ".weather");
+            stmt.addBatch("drop database " + dbName);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void clearBatch() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            stmt.clearBatch();
+            stmt.addBatch("create database " + dbName);
+            stmt.addBatch("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            stmt.addBatch("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            stmt.addBatch("select * from " + dbName + ".weather");
+            stmt.addBatch("drop database " + dbName);
+            stmt.clearBatch();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void executeBatch() {
+        final String dbName = ("test_" + UUID.randomUUID()).replace("-", "_").substring(0, 32);
+        try {
+            stmt.addBatch("create database " + dbName);
+            stmt.addBatch("create table " + dbName + ".weather(ts timestamp, temperature float) tags(loc nchar(64))");
+            stmt.addBatch("insert into " + dbName + ".t1 using " + dbName + ".weather tags('北京') values(now, 22.33)");
+            stmt.addBatch("select * from " + dbName + ".weather");
+            stmt.addBatch("drop database " + dbName);
+            int[] results = stmt.executeBatch();
+            Assert.assertEquals(0, results[0]);
+            Assert.assertEquals(0, results[1]);
+            Assert.assertEquals(1, results[2]);
+            Assert.assertEquals(Statement.SUCCESS_NO_INFO, results[3]);
+            Assert.assertEquals(0, results[4]);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void getConnection() {
+        try {
+            Connection connection = stmt.getConnection();
+            Assert.assertNotNull(connection);
+            Assert.assertTrue(this.conn == connection);
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @Test
+    public void isClosed() {
+        try {
+            Assert.assertEquals(false, stmt.isClosed());
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @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);
+            stmt = conn.createStatement();
+        } catch (ClassNotFoundException e) {
+            e.printStackTrace();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    @AfterClass
+    public static void afterClass() {
+        try {
+            if (stmt != null)
+                stmt.close();
+            if (conn != null)
+                conn.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+}

src/connector/jdbc/src/test/java/com/taosdata/jdbc/cases/InvalidResultSetPointerTest.java

@@ -0,0 +1,187 @@
+package com.taosdata.jdbc.cases;
+
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.sql.*;
+import java.util.Properties;
+
+public class InvalidResultSetPointerTest {
+
+    private static String host = "127.0.0.1";
+    private static final String dbName = "test";
+    private static final String stbName = "stb";
+    private static final String tbName = "tb";
+    private static Connection connection;
+    private static int numOfSTb = 30000;
+    private static int numOfTb = 3;
+    private static int numOfThreads = 100;
+
+    @Test
+    public void test() throws SQLException {
+        execute("drop database if exists " + dbName);
+        execute("create database if not exists " + dbName);
+        execute("use " + dbName);
+        createSTable();
+        createTable();
+        insert();
+        selectMultiThreading();
+        close();
+    }
+
+    private void insert() {
+        for (int i = 0; i < numOfSTb; i++) {
+            for (int j = 0; j < numOfTb; j++) {
+                final String sql = "INSERT INTO " + dbName + "." + tbName + i + "_" + j + " (ts, temperature, humidity, name) values(now, 20.5, 34, \"" + i + "\")";
+                System.out.println(sql);
+                execute(sql);
+            }
+        }
+    }
+
+    private void createSTable() {
+        for (int i = 0; i < numOfSTb; i++) {
+            final String sql = "create table if not exists " + dbName + "." + stbName + i + " (ts timestamp, temperature float, humidity int, name BINARY(" + (i % 73 + 10) + ")) TAGS (tag1 INT)";
+            execute(sql);
+        }
+    }
+
+    private void createTable() {
+        for (int i = 0; i < numOfSTb; i++) {
+            for (int j = 0; j < numOfTb; j++) {
+                final String sql = "create table if not exists " + dbName + "." + tbName + i + "_" + j + " USING " + stbName + i + " TAGS(" + j + ")";
+                execute(sql);
+            }
+        }
+    }
+
+    private void close() throws SQLException {
+        if (connection != null) {
+            this.connection.close();
+            System.out.println("connection closed.");
+        }
+    }
+
+    private void selectMultiThreading() {
+        int a = numOfSTb / numOfThreads;
+        if (a < 1) {
+            numOfThreads = numOfSTb;
+            a = 1;
+        }
+
+        int b = 0;
+        if (numOfThreads != 0) {
+            b = numOfSTb % numOfThreads;
+        }
+
+        multiThreadingClass instance[] = new multiThreadingClass[numOfThreads];
+
+        int last = 0;
+        for (int i = 0; i < numOfThreads; i++) {
+            instance[i] = new multiThreadingClass();
+            instance[i].id = i;
+            instance[i].from = last;
+            if (i < b) {
+                instance[i].to = last + a;
+            } else {
+                instance[i].to = last + a - 1;
+            }
+
+            last = instance[i].to + 1;
+            instance[i].numOfTb = numOfTb;
+            instance[i].connection = connection;
+            instance[i].dbName = dbName;
+            instance[i].tbName = tbName;
+            instance[i].start();
+        }
+
+        for (int i = 0; i < numOfThreads; i++) {
+            try {
+                instance[i].join();
+            } catch (InterruptedException ie) {
+                ie.printStackTrace();
+            }
+        }
+    }
+
+    @BeforeClass
+    public static void beforeClass() {
+        try {
+            String url = "jdbc:TAOS://" + host + ":6030/?user=root&password=taosdata";
+            Class.forName("com.taosdata.jdbc.TSDBDriver");
+            Properties properties = new Properties();
+            properties.setProperty("charset", "UTF-8");
+            properties.setProperty("locale", "en_US.UTF-8");
+            properties.setProperty("timezone", "UTC-8");
+            System.out.println("get connection starting...");
+            connection = DriverManager.getConnection(url, properties);
+            if (connection != null)
+                System.out.println("[ OK ] Connection established.");
+        } catch (ClassNotFoundException | SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void execute(String sql) {
+        try (Statement statement = connection.createStatement()) {
+            long start = System.currentTimeMillis();
+            statement.execute(sql);
+            long end = System.currentTimeMillis();
+            printSql(sql, (end - start));
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    private void printSql(String sql, long cost) {
+        System.out.println("time cost: " + cost + " ms, execute statement ====> " + sql);
+    }
+
+    private void executeQuery(String sql) {
+        try (Statement statement = connection.createStatement()) {
+            long start = System.currentTimeMillis();
+            ResultSet resultSet = statement.executeQuery(sql);
+            long end = System.currentTimeMillis();
+            printSql(sql, (end - start));
+//            printResult(resultSet);
+            resultSet.close();
+            statement.close();
+        } catch (SQLException e) {
+            e.printStackTrace();
+        }
+    }
+
+    class multiThreadingClass extends Thread {
+        public int id;
+        public int from, to;
+        public int numOfTb;
+        public Connection connection;
+        public String dbName;
+        public String tbName;
+
+        public void run() {
+            System.out.println("ID: " + id + " from: " + from + " to: " + to);
+            try {
+                Thread.sleep(1000);
+            } catch (InterruptedException e) {
+                System.out.println("Thread " + id + " interrupted.");
+            }
+
+            for (int i = from; i < to; i++) {
+                for (int j = 0; j < numOfTb; j++) {
+                    if (j % 1000 == 0) {
+                        try {
+                            System.out.print(id + "s.");
+                            Thread.sleep(1);
+                        } catch (InterruptedException e) {
+                            System.out.println("Thread " + id + " interrupted.");
+                        }
+                    }
+                    final String sql = "select last_row(humidity) from " + dbName + "." + tbName + i + "_" + j;
+                    executeQuery(sql);
+                }
+            }
+        }
+    }
+
+}

src/connector/jdbc/src/test/java/com/taosdata/jdbc/rs/RestfulResultSetTest.java

@@ -259,10 +259,12 @@ public class RestfulResultSetTest {
         rs.previous();
     }
 
-    @Test(expected = SQLException.class)
+    @Test
     public void setFetchDirection() throws SQLException {
         rs.setFetchDirection(ResultSet.FETCH_FORWARD);
+        Assert.assertEquals(ResultSet.FETCH_FORWARD, rs.getFetchDirection());
         rs.setFetchDirection(ResultSet.FETCH_UNKNOWN);
+        Assert.assertEquals(ResultSet.FETCH_FORWARD, rs.getFetchDirection());
     }
 
     @Test
@@ -270,14 +272,15 @@ public class RestfulResultSetTest {
         Assert.assertEquals(ResultSet.FETCH_FORWARD, rs.getFetchDirection());
     }
 
-    @Test(expected = SQLException.class)
+    @Test
     public void setFetchSize() throws SQLException {
         rs.setFetchSize(0);
+        Assert.assertEquals(0, rs.getFetchSize());
     }
 
     @Test
     public void getFetchSize() throws SQLException {
-        Assert.assertEquals(1, rs.getFetchSize());
+        Assert.assertEquals(0, rs.getFetchSize());
     }
 
     @Test
@@ -526,9 +529,12 @@ public class RestfulResultSetTest {
         rs.updateSQLXML(1, null);
     }
 
-    @Test(expected = SQLFeatureNotSupportedException.class)
+    @Test
     public void getNString() throws SQLException {
-        rs.getNString("f1");
+        String f10 = rs.getNString("f10");
+        Assert.assertEquals("涛思数据", f10);
+        f10 = rs.getNString(10);
+        Assert.assertEquals("涛思数据", f10);
     }
 
     @Test(expected = SQLFeatureNotSupportedException.class)