Bug 122854 There is redundant columns in "available columns" list in "export data" dialog.
Description: There is redundant columns in "available columns" list in "export data" dialog. Steps to reproduce: 1. Preview attached design in web viewer. 2. Select the table and click on "export" button. 3. There is a "detail" column name in "available columns" list which is not data set column.
engine/org.eclipse.birt.report.engine/src/org/eclipse/birt/report/engine/data/dte/ReportQueryBuilder.java
{
			ArrayList filters = new ArrayList( );
			if ( iter != null )
			{
				while ( iter.hasNext( ) )
				{
					FilterConditionHandle filterHandle = (FilterConditionHandle) iter
							.next( );
					IFilterDefinition filter = createFilter( filterHandle );
					filters.add( filter );
				}
			}
			return filters;
		}
		/**
		 * create filter array given a Listing design element
		 * 
		 * @param listing
		 *            the ListingDesign
		 * @return the filter array
		 */
		public ArrayList createFilters( ListingDesign listing )
		{
			return createFilters( ( (ListingHandle) listing.getHandle( ) )
					.filtersIterator( ) );
		}
		/**
		 * create fileter array given a DataSetHandle
		 * 
		 * @param dataSet