Bug 182680 Use feature of new Aggregation framework of Data Engine.
DataEngine will implement new aggregation framework in 2.2.0RC0. After the implementation is finished Engine should go ahead to use new column bindings in definition of map/highlight.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/api/impl/ResultMetaData.java
}
	public String getColumnAlias( int index ) throws BirtException
	{
		return getColumnName( index );
	}
	public int getColumnType( int index ) throws BirtException
	{
		index = getColumnIndex( index );
		if( null != parentMetaData )
		{
			return parentMetaData.getColumnType( index );
		}
		else
		{
			MetaDataEntry entry = (MetaDataEntry) metaEntries.get( index );
			return entry.type;
		}
	}
	public String getColumnTypeName( int index ) throws BirtException
	{
		int type = getColumnType( index );
		return DataType.getName( type );
	}
	public String getColumnLabel( int index ) throws BirtException
	{
		return getColumnName( index );
	}
	private int getColumnIndex( int index ) throws BirtException
	{
		if ( selectedColumns == null )