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.report.data.oda.jdbc/src/org/eclipse/birt/report/data/oda/jdbc/Statement.java
cachedResultMetaData = this.cachedResultSet.getMetaData( );
		}
		
		return cachedResultMetaData;
	}
	/*
	 * @see org.eclipse.datatools.connectivity.IQuery#executeQuery()
	 */
	public IResultSet executeQuery( ) throws OdaException
	{
		logger.logp( java.util.logging.Level.FINE,
				Statement.class.getName( ),
				"executeQuery",
				"Statement.executeQuery( )" );
		assertNotNull( preStat );
		
		
		
		if ( this.cachedResultSet != null )
		{
			IResultSet ret = this.cachedResultSet;
			this.cachedResultSet = null;	
			return ret;
		}
		
		try
		{
			if ( maxrows >= 0 && !maxRowsUpToDate )
			{
				try