Bug 139110 GUI enhancement to support create subquery more conveniently.
Description: GUI enhancement to support create subquery more conveniently. Steps to reproduce: Subquery means insert table/list inside another table/list item, and the inner table/list item doesn't has its own dataset binding. In latest build, if you want to creat a subquery structure, you have to use dataSetRow as binding expression for data items in inner table/list item. For example: 1. Insert a list, generate column data binding for it. 2. Add a group for the list. 3. Insert table to list group header which is used to display data rows in list group. Dont' bind table to dataset. 4. Insert a data to table detail row. 5. New a binding column for data, click to Open Expression Builder. The issue is that only "Availabel column bindings" is listed in Category but no "Available Data Sets". So I have to type dataSetRow[".."] by myself to generate correct subquery. For users, maybe they will mistakenly use "Available column bindings" which will generate expression like row._outer[".."] and get wrong result. So it is recommended to add "Available Data Sets" in Expression Builder for such case.
UI/org.eclipse.birt.report.designer.core/src/org/eclipse/birt/report/designer/util/DEUtil.java
*         the top to the given element
	 */
	public static List getAllColumnBindingList( DesignElementHandle handle,
			boolean includeSelf )
	{
		List bindingList = new ArrayList( );
		if ( handle instanceof ReportElementHandle )
		{
			Iterator iterator = getBindingColumnIterator( handle );
			while ( iterator.hasNext( ) )
			{
				bindingList.add( iterator.next( ) );
			}
			if ( handle instanceof ListingHandle )
			{
				SlotHandle groupSlotHandle = ( (ListingHandle) handle ).getGroups( );
				for ( Iterator iter = groupSlotHandle.iterator( ); iter.hasNext( ); )
				{
					GroupHandle group = (GroupHandle) iter.next( );
					for ( Iterator columnIter = group.columnBindingsIterator( ); columnIter.hasNext( ); )
					{
						bindingList.add( columnIter.next( ) );
					}
				}
			}
			bindingList.addAll( 0,
					getAllColumnBindingList( handle.getContainer( ), true ) );
		}
		return bindingList;
	}