Bug 152443 Support boolean type in data set
Support boolean type in data set. It'll cause some data transform issue with absence of boolean type.
data/org.eclipse.birt.data/src/org/eclipse/birt/data/engine/odaconsumer/PreparedStatement.java
public void declareCustomColumn( String columnName, Class columnType )
		throws DataException
	{
		String methodName = "declareCustomColumn";		
		if( sm_logger.isLoggingEnterExitLevel() )
			sm_logger.entering( sm_className, methodName, 
								new Object[] { columnName, columnType } );
		
		assert columnName != null;
		assert columnName.length() != 0;
		 
		 
		
		resetCurrentMetaData();
		getProjectedColumns().addCustomColumn( columnName, columnType);
		
		sm_logger.exiting( sm_className, methodName );
	}
	
	/**
	 * Declares a new custom column for the <code>IResultClass</code> of the 
	 * specified result set.
	 * @param resultSetName	the name of the result set.
	 * @param columnName	the custom column name.
	 * @param columnType	the custom column type.
	 * @throws DataException	if data source error occurs.
	 */
	public void declareCustomColumn( String resultSetName, String columnName, 
									 Class columnType ) throws DataException
	{