Bug 135474 [Smoke]Data in computed columns can't be read
Details: Data in computed columns can't be read Step: 1. New a datasource and dataset 2. Add a computed columns and input some wore in Expression. 3. Drop the table into layout and preview. Actual result: The column of computed columns only preview undefined.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/NativeRowObject.java
return NOT_FOUND;
	}
	public boolean has( String name, Scriptable start )
	{
		Iterator iter = rsets.iterator( );
		while ( iter.hasNext( ) )
		{
			IResultSet rset = (IResultSet) iter.next( );
			try
			{
				IResultMetaData metaData = rset.getResultMetaData( );
				for ( int i = 0; i < metaData.getColumnCount( ); i++ )
				{
					String colName = metaData.getColumnName( i );
					if ( colName.equals( name ) )
					{
						return true;
					}
				}
			}
			catch ( BirtException ex )
			{
				
			}
		}
		return false;
	}
	public boolean has( int index, Scriptable start )
	{
		return false;