content: /**
   * Copyright The Apache Software Foundation
   *
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements. See the NOTICE file distributed with this
   * work for additional information regarding copyright ownership. The ASF
   * licenses this file to you under the Apache License, Version 2.0 (the
   * "License"); you may not use this file except in compliance with the License.
   * You may obtain a copy of the License at
   *
   * http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
   * WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
   * License for the specific language governing permissions and limitations
   * under the License.
   */
  package com.alibaba.wasp.jdbc.result;
  
  import com.alibaba.wasp.DataType;
  import com.alibaba.wasp.SQLErrorCode;
  import com.alibaba.wasp.jdbc.JdbcConnection;
  import com.alibaba.wasp.jdbc.JdbcException;
  import com.alibaba.wasp.jdbc.JdbcPreparedStatement;
  import com.alibaba.wasp.jdbc.JdbcStatement;
  import com.alibaba.wasp.jdbc.Logger;
  import com.alibaba.wasp.jdbc.value.Value;
  import com.alibaba.wasp.jdbc.value.ValueBoolean;
  import com.alibaba.wasp.jdbc.value.ValueByte;
  import com.alibaba.wasp.jdbc.value.ValueBytes;
  import com.alibaba.wasp.jdbc.value.ValueDate;
  import com.alibaba.wasp.jdbc.value.ValueDecimal;
  import com.alibaba.wasp.jdbc.value.ValueDouble;
  import com.alibaba.wasp.jdbc.value.ValueFloat;
  import com.alibaba.wasp.jdbc.value.ValueInt;
  import com.alibaba.wasp.jdbc.value.ValueLong;
  import com.alibaba.wasp.jdbc.value.ValueNull;
  import com.alibaba.wasp.jdbc.value.ValueShort;
  import com.alibaba.wasp.jdbc.value.ValueString;
  import com.alibaba.wasp.jdbc.value.ValueTime;
  import com.alibaba.wasp.jdbc.value.ValueTimestamp;
  import com.alibaba.wasp.util.DateTimeUtils;
  import com.alibaba.wasp.util.MathUtils;
  import com.alibaba.wasp.util.New;
  import com.alibaba.wasp.util.StringUtils;
  import org.apache.commons.lang.NotImplementedException;
  import org.apache.commons.logging.Log;
  import org.apache.commons.logging.LogFactory;
  
  import java.io.InputStream;
  import java.io.Reader;
  import java.math.BigDecimal;
  import java.net.URL;
  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.Calendar;
  import java.util.HashMap;
  import java.util.Map;
  
  /**
   * <p>
   * Represents a result set.
   * </p>
   * <p>
   * Column labels are case-insensitive, quotes are not supported. The first
   * column has the column index 1.
   * </p>
   * <p>
   * Updatable result sets: Result sets are updatable when the result only
   * contains columns from one table, and if it contains all columns of a unique
   * index (primary key or other) of this table. Key columns may not contain NULL
   * (because multiple rows with NULL could exist). In updatable result sets, own
   * changes are visible, but not own inserts and deletes.
   * </p>
   */
  public class JdbcResultSet implements ResultSet {
  
    private Log log = LogFactory.getLog(JdbcResultSet.class);
  
    private final boolean closeStatement;
    private ResultInterface result;
    private JdbcConnection conn;
    private JdbcStatement stat;
    private int columnCount;
    private boolean wasNull;
    private Value[] insertRow;
    private Value[] updateRow;
    private HashMap<String, Integer> columnLabelMap;
  
    public JdbcResultSet(JdbcConnection conn, JdbcStatement stat,
        ResultInterface result, boolean closeStatement) {
      this.conn = conn;
      this.stat = stat;
      this.result = result;
      columnCount = result.getVisibleColumnCount();
      this.closeStatement = closeStatement;
    }
  
    JdbcResultSet(JdbcConnection conn, JdbcPreparedStatement preparedStatement,
        ResultInterface result, boolean closeStatement,
        HashMap<String, Integer> columnLabelMap) {
      this(conn, preparedStatement, result, closeStatement);
      this.columnLabelMap = columnLabelMap;
    }
  
    /**
     * Moves the cursor to the next row of the result set.
     * 
     * @return true if successful, false if there are no more rows
     */
    @Override
    public boolean next() throws SQLException {
      try {
        checkClosed();
        return nextRow();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Gets the meta data of this result set.
     * 
     * @return the meta data
     */
    @Override
    public ResultSetMetaData getMetaData() throws SQLException {
      try {
        checkClosed();
        JdbcResultSetMetaData meta = new JdbcResultSetMetaData(this, result, null);
        return meta;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns whether the last column accessed was null.
     * 
     * @return true if the last column accessed was null
     */
    @Override
    public boolean wasNull() throws SQLException {
      try {
        checkClosed();
        return wasNull;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Searches for a specific column in the result set. A case-insensitive search
     * is made.
     * 
     * @param columnLabel
     *          the column label
     * @return the column index (1,2,...)
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public int findColumn(String columnLabel) throws SQLException {
      try {
        return getColumnIndex(columnLabel);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Closes the result set.
     */
    @Override
    public void close() throws SQLException {
      try {
        closeInternal();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Close the result set. This method also closes the statement if required.
     */
    public void closeInternal() throws SQLException {
      if (result != null) {
        try {
          result.close();
          if (closeStatement && stat != null) {
            stat.close();
          }
        } finally {
          columnCount = 0;
          result = null;
          stat = null;
          conn = null;
          insertRow = null;
          updateRow = null;
        }
      }
    }
  
    /**
     * Returns the statement that created this object.
     *
     * @return the statement or prepared statement, or null if created by a
     *         DatabaseMetaData call.
     */
    @Override
    public Statement getStatement() throws SQLException {
      try {
        checkClosed();
        if (closeStatement) {
          // if the result set was opened by a DatabaseMetaData call
          return null;
        }
        return stat;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Gets the first warning reported by calls on this object.
     *
     * @return null
     */
    @Override
    public SQLWarning getWarnings() throws SQLException {
      try {
        checkClosed();
        return null;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Clears all warnings.
     */
    @Override
    public void clearWarnings() throws SQLException {
      try {
        checkClosed();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    // =============================================================
  
    /**
     * Returns the value of the specified column as a String.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public String getString(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getString();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a String.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public String getString(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getString();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as an int.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public int getInt(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getInt();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as an int.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public int getInt(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getInt();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a BigDecimal.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public BigDecimal getBigDecimal(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getBigDecimal();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Date.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Date getDate(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getDate();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Time.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Time getTime(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getTime();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Timestamp.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Timestamp getTimestamp(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getTimestamp();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a BigDecimal.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public BigDecimal getBigDecimal(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getBigDecimal();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Date.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Date getDate(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getDate();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Time.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Time getTime(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getTime();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Timestamp.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Timestamp getTimestamp(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getTimestamp();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns a column value as a Java object. The data is de-serialized into a
     * Java object (on the client side).
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value or null
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Object getObject(int columnIndex) throws SQLException {
      try {
        Value v = get(columnIndex);
        return conn.convertToDefaultObject(v);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns a column value as a Java object. The data is de-serialized into a
     * Java object (on the client side).
     *
     * @param columnLabel
     *          the column label
     * @return the value or null
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Object getObject(String columnLabel) throws SQLException {
      try {
        Value v = get(columnLabel);
        return conn.convertToDefaultObject(v);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a boolean.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public boolean getBoolean(int columnIndex) throws SQLException {
      try {
        Boolean v = get(columnIndex).getBoolean();
        return v == null ? false : v.booleanValue();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a boolean.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public boolean getBoolean(String columnLabel) throws SQLException {
      try {
        Boolean v = get(columnLabel).getBoolean();
        return v == null ? false : v.booleanValue();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a byte.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public byte getByte(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getByte();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a byte.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public byte getByte(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getByte();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a short.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public short getShort(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getShort();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a short.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public short getShort(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getShort();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a long.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public long getLong(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getLong();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a long.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public long getLong(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getLong();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a float.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public float getFloat(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getFloat();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a float.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public float getFloat(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getFloat();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a double.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public double getDouble(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getDouble();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a double.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public double getDouble(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getDouble();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a BigDecimal.
     *
     * @deprecated use {@link #getBigDecimal(String)}
     *
     * @param columnLabel
     *          the column label
     * @param scale
     *          the scale of the returned value
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public BigDecimal getBigDecimal(String columnLabel, int scale)
        throws SQLException {
      try {
        if (scale < 0) {
          throw JdbcException.getInvalidValueException("scale", scale);
        }
        BigDecimal bd = get(columnLabel).getBigDecimal();
        return bd == null ? null : MathUtils.setScale(bd, scale);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a BigDecimal.
     *
     * @deprecated use {@link #getBigDecimal(int)}
     *
     * @param columnIndex
     *          (1,2,...)
     * @param scale
     *          the scale of the returned value
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public BigDecimal getBigDecimal(int columnIndex, int scale)
        throws SQLException {
      try {
        if (scale < 0) {
          throw JdbcException.getInvalidValueException("scale", scale);
        }
        BigDecimal bd = get(columnIndex).getBigDecimal();
        return bd == null ? null : MathUtils.setScale(bd, scale);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * [Not supported]
     *
     * @deprecated since JDBC 2.0, use getCharacterStream
     */
    @Override
    public InputStream getUnicodeStream(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("unicodeStream");
    }
  
    /**
     * [Not supported]
     *
     * @deprecated since JDBC 2.0, use setCharacterStream
     */
    @Override
    public InputStream getUnicodeStream(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("unicodeStream");
    }
  
    /**
     * [Not supported] Gets a column as a object using the specified type mapping.
     */
    @Override
    public Object getObject(int columnIndex, Map<String, Class<?>> map)
        throws SQLException {
      throw JdbcException.getUnsupportedException("map");
    }
  
    /**
     * [Not supported] Gets a column as a object using the specified type mapping.
     */
    @Override
    public Object getObject(String columnLabel, Map<String, Class<?>> map)
        throws SQLException {
      throw JdbcException.getUnsupportedException("map");
    }
  
    /**
     * [Not supported] Gets a column as a reference.
     */
    @Override
    public Ref getRef(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("ref");
    }
  
    /**
     * [Not supported] Gets a column as a reference.
     */
    @Override
    public Ref getRef(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("ref");
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Date using a
     * specified time zone.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Date getDate(int columnIndex, Calendar calendar) throws SQLException {
      try {
        return DateTimeUtils.convertDate(get(columnIndex), calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Date using a
     * specified time zone.
     *
     * @param columnLabel
     *          the column label
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Date getDate(String columnLabel, Calendar calendar)
        throws SQLException {
      try {
        return DateTimeUtils.convertDate(get(columnLabel), calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Time using a
     * specified time zone.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Time getTime(int columnIndex, Calendar calendar) throws SQLException {
      try {
        return DateTimeUtils.convertTime(get(columnIndex), calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Time using a
     * specified time zone.
     *
     * @param columnLabel
     *          the column label
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Time getTime(String columnLabel, Calendar calendar)
        throws SQLException {
      try {
        return DateTimeUtils.convertTime(get(columnLabel), calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Timestamp using a
     * specified time zone.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Timestamp getTimestamp(int columnIndex, Calendar calendar)
        throws SQLException {
      try {
        Value value = get(columnIndex);
        return DateTimeUtils.convertTimestamp(value, calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a java.sql.Timestamp.
     *
     * @param columnLabel
     *          the column label
     * @param calendar
     *          the calendar
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Timestamp getTimestamp(String columnLabel, Calendar calendar)
        throws SQLException {
      try {
        Value value = get(columnLabel);
        return DateTimeUtils.convertTimestamp(value, calendar);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a Blob.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Blob getBlob(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getBlob");
    }
  
    /**
     * Returns the value of the specified column as a Blob.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Blob getBlob(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getBlob");
    }
  
    /**
     * Returns the value of the specified column as a byte array.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public byte[] getBytes(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getBytes();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a byte array.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *
     *           if the column is not found or if the result set is closed
     */
    @Override
    public byte[] getBytes(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getBytes();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as an input stream.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public InputStream getBinaryStream(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getInputStream();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as an input stream.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public InputStream getBinaryStream(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getInputStream();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a Clob.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Clob getClob(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getClob");
    }
  
    /**
     * Returns the value of the specified column as a Clob.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Clob getClob(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getClob");
    }
  
    /**
     * Returns the value of the specified column as an Array.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Array getArray(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getArray");
    }
  
    /**
     * Returns the value of the specified column as an Array.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Array getArray(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getArray");
    }
  
    /**
     * Returns the value of the specified column as an input stream.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public InputStream getAsciiStream(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getAsciiStream");
    }
  
    /**
     * Returns the value of the specified column as an input stream.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public InputStream getAsciiStream(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getAsciiStream");
    }
  
    /**
     * Returns the value of the specified column as a reader.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Reader getCharacterStream(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getCharacterStream");
    }
  
    /**
     * Returns the value of the specified column as a reader.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Reader getCharacterStream(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getCharacterStream");
    }
  
    /**
     * [Not supported]
     */
    @Override
    public URL getURL(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getURL");
    }
  
    /**
     * [Not supported]
     */
    @Override
    public URL getURL(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getURL");
    }
  
    // =============================================================
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNull(int columnIndex) throws SQLException {
      try {
        update(columnIndex, ValueNull.INSTANCE);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNull(String columnLabel) throws SQLException {
      try {
        update(columnLabel, ValueNull.INSTANCE);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBoolean(int columnIndex, boolean x) throws SQLException {
      try {
        update(columnIndex, ValueBoolean.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if result set is closed or not updatable
     */
    @Override
    public void updateBoolean(String columnLabel, boolean x) throws SQLException {
      try {
        update(columnLabel, ValueBoolean.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateByte(int columnIndex, byte x) throws SQLException {
      try {
        update(columnIndex, ValueByte.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateByte(String columnLabel, byte x) throws SQLException {
      try {
        update(columnLabel, ValueByte.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBytes(int columnIndex, byte[] x) throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueBytes.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBytes(String columnLabel, byte[] x) throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueBytes.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateShort(int columnIndex, short x) throws SQLException {
      try {
        update(columnIndex, ValueShort.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateShort(String columnLabel, short x) throws SQLException {
      try {
        update(columnLabel, ValueShort.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateInt(int columnIndex, int x) throws SQLException {
      try {
        update(columnIndex, ValueInt.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateInt(String columnLabel, int x) throws SQLException {
      try {
        update(columnLabel, ValueInt.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateLong(int columnIndex, long x) throws SQLException {
      try {
        update(columnIndex, ValueLong.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateLong(String columnLabel, long x) throws SQLException {
      try {
        update(columnLabel, ValueLong.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateFloat(int columnIndex, float x) throws SQLException {
      try {
        update(columnIndex, ValueFloat.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateFloat(String columnLabel, float x) throws SQLException {
      try {
        update(columnLabel, ValueFloat.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateDouble(int columnIndex, double x) throws SQLException {
      try {
        update(columnIndex, ValueDouble.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateDouble(String columnLabel, double x) throws SQLException {
      try {
        update(columnLabel, ValueDouble.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBigDecimal(int columnIndex, BigDecimal x)
        throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueDecimal.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBigDecimal(String columnLabel, BigDecimal x)
        throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueDecimal.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateString(int columnIndex, String x) throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueString.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateString(String columnLabel, String x) throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueString.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateDate(int columnIndex, Date x) throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueDate.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateDate(String columnLabel, Date x) throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueDate.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateTime(int columnIndex, Time x) throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueTime.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateTime(String columnLabel, Time x) throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueTime.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateTimestamp(int columnIndex, Timestamp x) throws SQLException {
      try {
        update(columnIndex, x == null ? (Value) ValueNull.INSTANCE
            : ValueTimestamp.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateTimestamp(String columnLabel, Timestamp x)
        throws SQLException {
      try {
        update(columnLabel, x == null ? (Value) ValueNull.INSTANCE
            : ValueTimestamp.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateAsciiStream(int columnIndex, InputStream x, int length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateAsciiStream(int columnIndex, InputStream x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateAsciiStream(int columnIndex, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateAsciiStream(String columnLabel, InputStream x, int length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public void updateAsciiStream(String columnLabel, InputStream x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateAsciiStream(String columnLabel, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateAsciiStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(int columnIndex, InputStream x, int length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBinaryStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(int columnIndex, InputStream x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBinaryStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(int columnIndex, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBinaryStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(String columnLabel, InputStream x)
        throws SQLException {
      updateBinaryStream(columnLabel, x, -1);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(String columnLabel, InputStream x, int length)
        throws SQLException {
      updateBinaryStream(columnLabel, x, (long) length);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBinaryStream(String columnLabel, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBinaryStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(int columnIndex, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(int columnIndex, Reader x, int length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(int columnIndex, Reader x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(String columnLabel, Reader x, int length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(String columnLabel, Reader x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateCharacterStream(String columnLabel, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param scale
     *          is ignored
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateObject(int columnIndex, Object x, int scale)
        throws SQLException {
      try {
        update(columnIndex, convertToUnknownValue(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param scale
     *          is ignored
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateObject(String columnLabel, Object x, int scale)
        throws SQLException {
      try {
        update(columnLabel, convertToUnknownValue(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateObject(int columnIndex, Object x) throws SQLException {
      try {
        update(columnIndex, convertToUnknownValue(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateObject(String columnLabel, Object x) throws SQLException {
      try {
        update(columnLabel, convertToUnknownValue(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateRef(int columnIndex, Ref x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateRef");
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateRef(String columnLabel, Ref x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateRef");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(int columnIndex, InputStream x) throws SQLException {
      updateBlob(columnIndex, x, -1);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(int columnIndex, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBlob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(int columnIndex, Blob x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateBlob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(String columnLabel, Blob x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateBlob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(String columnLabel, InputStream x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateBlob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateBlob(String columnLabel, InputStream x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateBlob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(int columnIndex, Clob x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(int columnIndex, Reader x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(int columnIndex, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(String columnLabel, Clob x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(String columnLabel, Reader x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateClob(String columnLabel, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("updateClob");
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateArray(int columnIndex, Array x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateArray");
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateArray(String columnLabel, Array x) throws SQLException {
      throw JdbcException.getUnsupportedException("updateArray");
    }
  
    /**
     * [Not supported] Gets the cursor name if it was defined. This feature is
     * superseded by updateX methods. This method throws a SQLException because
     * cursor names are not supported.
     */
    @Override
    public String getCursorName() throws SQLException {
      throw JdbcException.getUnsupportedException("cursorName");
    }
  
    /**
     * Gets the current row number. The first row is row 1, the second 2 and so
     * on. This method returns 0 before the first and after the last row.
     *
     * @return the row number
     */
    @Override
    public int getRow() throws SQLException {
      try {
        checkClosed();
        int rowId = result.getRowId();
        if (rowId >= result.getRowCount()) {
          return 0;
        }
        return rowId + 1;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Gets the result set concurrency. Result sets are only updatable if the
     * statement was created with updatable concurrency, and if the result set
     * contains all columns of the primary key or of a unique index of a table.
     *
     * @return ResultSet.CONCUR_UPDATABLE if the result set is updatable, or
     *         ResultSet.CONCUR_READ_ONLY otherwise
     */
    @Override
    public int getConcurrency() throws SQLException {
      throw JdbcException.getUnsupportedException("getConcurrency");
    }
  
    /**
     * Gets the fetch direction.
     *
     * @return the direction: FETCH_FORWARD
     */
    @Override
    public int getFetchDirection() throws SQLException {
      try {
        checkClosed();
        return ResultSet.FETCH_FORWARD;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Gets the number of rows suggested to read in one step.
     *
     * @return the current fetch size
     */
    @Override
    public int getFetchSize() throws SQLException {
      try {
        checkClosed();
        return result.getFetchSize();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Sets the number of rows suggested to read in one step. This value cannot be
     * higher than the maximum rows (setMaxRows) set by the statement or prepared
     * statement, otherwise an exception is throws. Setting the value to 0 will
     * set the default value. The default value can be changed using the system
     * property h2.serverResultSetFetchSize.
     *
     * @param rows
     *          the number of rows
     */
    @Override
    public void setFetchSize(int rows) throws SQLException {
      try {
        checkClosed();
        if (rows <= 0) {
          throw JdbcException.getInvalidValueException("rows", rows);
        } else {
          if (stat != null) {
            int maxRows = stat.getMaxRows();
            if (maxRows > 0 && rows > maxRows) {
              throw JdbcException.getInvalidValueException("rows", rows);
            }
          }
        }
        result.setFetchSize(rows);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * [Not supported] Sets (changes) the fetch direction for this result set.
     * This method should only be called for scrollable result sets, otherwise it
     * will throw an exception (no matter what direction is used).
     *
     * @param direction
     *          the new fetch direction
     * @throws java.sql.SQLException
     *           Unsupported Feature if the method is called for a forward-only
     *           result set
     */
    @Override
    public void setFetchDirection(int direction) throws SQLException {
      throw JdbcException.getUnsupportedException("setFetchDirection");
    }
  
    /**
     * Get the result set type.
     *
     * @return the result set type (TYPE_FORWARD_ONLY, TYPE_SCROLL_INSENSITIVE or
     *         TYPE_SCROLL_SENSITIVE)
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public int getType() throws SQLException {
      try {
        checkClosed();
        return stat == null ? ResultSet.TYPE_FORWARD_ONLY : stat.resultSetType;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Checks if the current position is before the first row, that means next()
     * was not called yet, and there is at least one row.
     *
     * @return if there are results and the current position is before the first
     *         row
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean isBeforeFirst() throws SQLException {
      try {
        checkClosed();
        int row = result.getRowId();
        int count = result.getRowCount();
        return count > 0 && row < 0;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Checks if the current position is after the last row, that means next() was
     * called and returned false, and there was at least one row.
     *
     * @return if there are results and the current position is after the last row
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean isAfterLast() throws SQLException {
      try {
        checkClosed();
        int row = result.getRowId();
        int count = result.getRowCount();
        return count > 0 && row >= count;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Checks if the current position is row 1, that means next() was called once
     * and returned true.
     *
     * @return if the current position is the first row
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean isFirst() throws SQLException {
      try {
        checkClosed();
        int row = result.getRowId();
        return row == 0 && row < result.getRowCount();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Checks if the current position is the last row, that means next() was
     * called and did not yet returned false, but will in the next call.
     *
     * @return if the current position is the last row
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean isLast() throws SQLException {
      try {
        checkClosed();
        int row = result.getRowId();
        return row >= 0 && row == result.getRowCount() - 1;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to before the first row, that means resets the
     * result set.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public void beforeFirst() throws SQLException {
      try {
        checkClosed();
        if (result.getRowId() >= 0) {
          resetResult();
        }
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to after the last row, that means after the end.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public void afterLast() throws SQLException {
      try {
        checkClosed();
        while (nextRow()) {
          // nothing
        }
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to the first row. This is the same as calling
     * beforeFirst() followed by next().
     *
     * @return true if there is a row available, false if not
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean first() throws SQLException {
      try {
        checkClosed();
        if (result.getRowId() < 0) {
          return nextRow();
        }
        resetResult();
        return nextRow();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to the last row.
     *
     * @return true if there is a row available, false if not
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean last() throws SQLException {
      try {
        checkClosed();
        return absolute(-1);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to a specific row.
     *
     * @param rowNumber
     *          the row number. 0 is not allowed, 1 means the first row, 2 the
     *          second. -1 means the last row, -2 the row before the last row. If
     *          the value is too large, the position is moved after the last row,
     *          if if the value is too small it is moved before the first row.
     * @return true if there is a row available, false if not
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean absolute(int rowNumber) throws SQLException {
      try {
        checkClosed();
        if (rowNumber < 0) {
          rowNumber = result.getRowCount() + rowNumber + 1;
        } else if (rowNumber > result.getRowCount() + 1) {
          rowNumber = result.getRowCount() + 1;
        }
        if (rowNumber <= result.getRowId()) {
          resetResult();
        }
        while (result.getRowId() + 1 < rowNumber) {
          nextRow();
        }
        int row = result.getRowId();
        return row >= 0 && row < result.getRowCount();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to a specific row relative to the current row.
     *
     * @param rowCount
     *          0 means don't do anything, 1 is the next row, -1 the previous. If
     *          the value is too large, the position is moved after the last row,
     *          if if the value is too small it is moved before the first row.
     * @return true if there is a row available, false if not
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean relative(int rowCount) throws SQLException {
      try {
        checkClosed();
        int row = result.getRowId() + 1 + rowCount;
        if (row < 0) {
          row = 0;
        } else if (row > result.getRowCount()) {
          row = result.getRowCount() + 1;
        }
        return absolute(row);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the cursor to the last row, or row before first row if the current
     * position is the first row.
     *
     * @return true if there is a row available, false if not
     * @throws java.sql.SQLException
     *           if the result set is closed
     */
    @Override
    public boolean previous() throws SQLException {
      try {
        checkClosed();
        return relative(-1);
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to the insert row. The current row is
     * remembered.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed or is not updatable
     */
    @Override
    public void moveToInsertRow() throws SQLException {
      try {
        checkUpdatable();
        insertRow = new Value[columnCount];
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Moves the current position to the current row.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed or is not updatable
     */
    @Override
    public void moveToCurrentRow() throws SQLException {
      try {
        checkUpdatable();
        insertRow = null;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Detects if the row was updated (by somebody else or the caller).
     *
     * @return false because this driver does not detect this
     */
    @Override
    public boolean rowUpdated() throws SQLException {
      try {
        return false;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Detects if the row was inserted.
     *
     * @return false because this driver does not detect this
     */
    @Override
    public boolean rowInserted() throws SQLException {
      try {
        return false;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Detects if the row was deleted (by somebody else or the caller).
     *
     * @return false because this driver does not detect this
     */
    @Override
    public boolean rowDeleted() throws SQLException {
      try {
        return false;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Inserts the current row. The current position must be the insert row.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed or if not on the insert row, or if
     *           the result set it not updatable
     */
    @Override
    public void insertRow() throws SQLException {
      throw JdbcException.getUnsupportedException("insertRow");
    }
  
    /**
     * Updates the current row.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed, if the current row is the insert row
     *           or if not on a valid row, or if the result set it not updatable
     */
    @Override
    public void updateRow() throws SQLException {
      throw JdbcException.getUnsupportedException("updateRow");
    }
  
    /**
     * Deletes the current row.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed, if the current row is the insert row
     *           or if not on a valid row, or if the result set it not updatable
     */
    @Override
    public void deleteRow() throws SQLException {
      throw JdbcException.getUnsupportedException("deleteRow");
    }
  
    /**
     * Re-reads the current row from the database.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed or if the current row is the insert
     *           row or if the row has been deleted or if not on a valid row
     */
    @Override
    public void refreshRow() throws SQLException {
      throw JdbcException.getUnsupportedException("refreshRow");
    }
  
    /**
     * Cancels updating a row.
     *
     * @throws java.sql.SQLException
     *           if the result set is closed or if the current row is the insert
     *           row
     */
    @Override
    public void cancelRowUpdates() throws SQLException {
      throw JdbcException.getUnsupportedException("cancelRowUpdates");
    }
  
    // =============================================================
  
    private int getColumnIndex(String columnLabel) {
      checkClosed();
      if (columnLabel == null) {
        throw JdbcException.getInvalidValueException("columnLabel", null);
      }
      if (columnCount >= 3) {
        // use a hash table if more than 2 columns
        if (columnLabelMap == null) {
          HashMap<String, Integer> map = New.hashMap(columnCount);
          // column labels have higher priority
          for (int i = 0; i < columnCount; i++) {
            String c = StringUtils.toUpperEnglish(result.getAlias(i));
            mapColumn(map, c, i);
          }
          for (int i = 0; i < columnCount; i++) {
            String colName = result.getColumnName(i);
            if (colName != null) {
              colName = StringUtils.toUpperEnglish(colName);
              mapColumn(map, colName, i);
              String tabName = result.getTableName(i);
              if (tabName != null) {
                colName = StringUtils.toUpperEnglish(tabName) + "." + colName;
                mapColumn(map, colName, i);
              }
            }
          }
          // assign at the end so concurrent access is supported
          columnLabelMap = map;
        }
        Integer index = columnLabelMap.get(StringUtils
            .toUpperEnglish(columnLabel));
        if (index == null) {
          throw JdbcException.get(SQLErrorCode.COLUMN_NOT_FOUND_1, columnLabel);
        }
        return index.intValue() + 1;
      }
      for (int i = 0; i < columnCount; i++) {
        if (columnLabel.equalsIgnoreCase(result.getAlias(i))) {
          return i + 1;
        }
      }
      int idx = columnLabel.indexOf('.');
      if (idx > 0) {
        String table = columnLabel.substring(0, idx);
        String col = columnLabel.substring(idx + 1);
        for (int i = 0; i < columnCount; i++) {
          if (table.equalsIgnoreCase(result.getTableName(i))
              && col.equalsIgnoreCase(result.getColumnName(i))) {
            return i + 1;
          }
        }
      } else {
        for (int i = 0; i < columnCount; i++) {
          if (columnLabel.equalsIgnoreCase(result.getColumnName(i))) {
            return i + 1;
          }
        }
      }
      throw JdbcException.get(SQLErrorCode.COLUMN_NOT_FOUND_1, columnLabel);
    }
  
    private static void mapColumn(HashMap<String, Integer> map, String label,
        int index) {
      // put the index (usually that's the only operation)
      Integer old = map.put(label, index);
      if (old != null) {
        // if there was a clash (which is seldom),
        // put the old one back
        map.put(label, old);
      }
    }
  
    private void checkColumnIndex(int columnIndex) {
      checkClosed();
      if (columnIndex < 1 || columnIndex > columnCount) {
        throw JdbcException.getInvalidValueException("columnIndex", columnIndex);
      }
    }
  
    /**
     * Check if this result set is closed.
     *
     * @throws com.alibaba.wasp.jdbc.JdbcException
     *           if it is closed
     */
    void checkClosed() {
      if (result == null) {
        throw JdbcException.get(SQLErrorCode.OBJECT_CLOSED);
      }
      if (stat != null) {
        stat.checkClosed();
      }
      if (conn != null) {
        conn.checkClosed();
      }
    }
  
    private void checkOnValidRow() {
      if (result.getRowId() < 0 || result.getRowId() >= result.getRowCount()) {
        throw JdbcException.get(SQLErrorCode.NO_DATA_AVAILABLE);
      }
    }
  
    private Value get(int columnIndex) {
      checkColumnIndex(columnIndex);
      checkOnValidRow();
      Value[] list = result.currentRow();
      Value value = list[columnIndex - 1];
      wasNull = value == ValueNull.INSTANCE;
      return value;
    }
  
    private Value get(String columnLabel) {
      int columnIndex = getColumnIndex(columnLabel);
      return get(columnIndex);
    }
  
    private void update(String columnLabel, Value v) {
      int columnIndex = getColumnIndex(columnLabel);
      update(columnIndex, v);
    }
  
    private void update(int columnIndex, Value v) {
      checkUpdatable();
      checkColumnIndex(columnIndex);
      if (insertRow != null) {
        insertRow[columnIndex - 1] = v;
      } else {
        if (updateRow == null) {
          updateRow = new Value[columnCount];
        }
        updateRow[columnIndex - 1] = v;
      }
    }
  
    private boolean nextRow() throws SQLException {
      boolean next = result.next();
      if (!next) {
        result.close();
      }
      return next;
    }
  
    /**
     * [Not supported] Returns the value of the specified column as a row id.
     *
     * @param columnIndex
     *          (1,2,...)
     */
    @Override
    public RowId getRowId(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("rowId");
    }
  
    /**
     * [Not supported] Returns the value of the specified column as a row id.
     *
     * @param columnLabel
     *          the column label
     */
    @Override
    public RowId getRowId(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("rowId");
    }
  
    /**
     * [Not supported] Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     */
    @Override
    public void updateRowId(int columnIndex, RowId x) throws SQLException {
      throw JdbcException.getUnsupportedException("rowId");
    }
  
    /**
     * [Not supported] Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     */
    @Override
    public void updateRowId(String columnLabel, RowId x) throws SQLException {
      throw JdbcException.getUnsupportedException("rowId");
    }
  
    /**
     * Returns the current result set holdability.
     *
     * @return the holdability
     * @throws java.sql.SQLException
     *           if the connection is closed
     */
    @Override
    public int getHoldability() throws SQLException {
      try {
        checkClosed();
        return conn.getHoldability();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns whether this result set is closed.
     *
     * @return true if the result set is closed
     */
    @Override
    public boolean isClosed() throws SQLException {
      try {
        return result == null;
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNString(int columnIndex, String x) throws SQLException {
      try {
        update(columnIndex,
            x == null ? (Value) ValueNull.INSTANCE : ValueString.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNString(String columnLabel, String x) throws SQLException {
      try {
        update(columnLabel,
            x == null ? (Value) ValueNull.INSTANCE : ValueString.get(x));
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateNClob(int columnIndex, NClob x) throws SQLException {
      throw JdbcException.getUnsupportedException("NClob");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNClob(int columnIndex, Reader x) throws SQLException {
      updateClob(columnIndex, x, -1);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNClob(int columnIndex, Reader x, long length)
        throws SQLException {
      updateClob(columnIndex, x, length);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNClob(String columnLabel, Reader x) throws SQLException {
      updateClob(columnLabel, x, -1);
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the length
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNClob(String columnLabel, Reader x, long length)
        throws SQLException {
      updateClob(columnLabel, x, length);
    }
  
    /**
     * [Not supported]
     */
    @Override
    public void updateNClob(String columnLabel, NClob x) throws SQLException {
      throw JdbcException.getUnsupportedException("NClob");
    }
  
    /**
     * Returns the value of the specified column as a Clob.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public NClob getNClob(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("NClob");
    }
  
    // */@Override
  
    /**
     * Returns the value of the specified column as a Clob.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public NClob getNClob(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("NClob");
    }
  
    /**
     * [Not supported] Returns the value of the specified column as a SQLXML
     * object.
     */
    @Override
    public SQLXML getSQLXML(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("SQLXML");
    }
  
    /**
     * [Not supported] Returns the value of the specified column as a SQLXML
     * object.
     */
    @Override
    public SQLXML getSQLXML(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("SQLXML");
    }
  
    // */@Override
  
    /**
     * [Not supported] Updates a column in the current or insert row.
     */
    @Override
    // ## Java 1.6 ##
    public void updateSQLXML(int columnIndex, SQLXML xmlObject)
        throws SQLException {
      throw JdbcException.getUnsupportedException("SQLXML");
    }
  
    /**
     * [Not supported] Updates a column in the current or insert row.
     */
    @Override
    public void updateSQLXML(String columnLabel, SQLXML xmlObject)
        throws SQLException {
      throw JdbcException.getUnsupportedException("SQLXML");
    }
  
    // */@Override
  
    /**
     * Returns the value of the specified column as a String.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public String getNString(int columnIndex) throws SQLException {
      try {
        return get(columnIndex).getString();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a String.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public String getNString(String columnLabel) throws SQLException {
      try {
        return get(columnLabel).getString();
      } catch (Exception e) {
        throw Logger.logAndConvert(log, e);
      }
    }
  
    /**
     * Returns the value of the specified column as a reader.
     *
     * @param columnIndex
     *          (1,2,...)
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Reader getNCharacterStream(int columnIndex) throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * Returns the value of the specified column as a reader.
     *
     * @param columnLabel
     *          the column label
     * @return the value
     * @throws java.sql.SQLException
     *           if the column is not found or if the result set is closed
     */
    @Override
    public Reader getNCharacterStream(String columnLabel) throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNCharacterStream(int columnIndex, Reader x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnIndex
     *          (1,2,...)
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNCharacterStream(int columnIndex, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNCharacterStream(String columnLabel, Reader x)
        throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * Updates a column in the current or insert row.
     *
     * @param columnLabel
     *          the column label
     * @param x
     *          the value
     * @param length
     *          the number of characters
     * @throws java.sql.SQLException
     *           if the result set is closed or not updatable
     */
    @Override
    public void updateNCharacterStream(String columnLabel, Reader x, long length)
        throws SQLException {
      throw JdbcException.getUnsupportedException("getNCharacterStream");
    }
  
    /**
     * [Not supported] Return an object of this class if possible.
     */
    @Override
    public <T> T unwrap(Class<T> iface) throws SQLException {
      throw JdbcException.getUnsupportedException("unwrap");
    }
  
    /**
     * [Not supported] Checks if unwrap can return an object of this class.
     */
    @Override
    public boolean isWrapperFor(Class<?> iface) throws SQLException {
      throw JdbcException.getUnsupportedException("isWrapperFor");
    }
  
    private void resetResult() {
      result.reset();
    }
  
    /**
     * INTERNAL
     */
    @Override
    public String toString() {
      return "ResultSet : " + result;
    }
  
    private Value convertToUnknownValue(Object x) {
      checkClosed();
      return DataType.convertToValue(conn.getSession(), x, Value.UNKNOWN);
    }
  
    private void checkUpdatable() {
      checkClosed();
      throw JdbcException.get(SQLErrorCode.RESULT_SET_READONLY);
    }
  
    public <T> T getObject(int columnIndex, Class<T> type) throws SQLException {
  	  throw new NotImplementedException();
    }
  
    public <T> T getObject(String columnLabel, Class<T> type) throws SQLException {
  	  throw new NotImplementedException();
    }
  }
  