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
getProjectedColumns().addHint( columnHint );
		}
		
		sm_logger.exiting( sm_className, methodName );
	}
	
	/**
	 * Adds a <code>ColumnHint</code> for this statement to map design time 
	 * column projections with the named runtime result set metadata.
	 * @param resultSetName		the name of the result set.
	 * @param columnHint		a <code>ColumnHint</code> instance.
	 * @throws DataException	if data source error occurs.
	 */
	public void addColumnHint( String resultSetName, ColumnHint columnHint )
		throws DataException
	{
		String methodName = "addColumnHint";
		if( sm_logger.isLoggingEnterExitLevel() )
			sm_logger.entering( sm_className, methodName, 
								new Object[] { resultSetName, columnHint } );
		
		checkNamedResultsSupport();
		
		if( columnHint != null )
		{