Copy Folder with Joins. Export/Import Folder with joins. In EUL.

Ok, I've got a custom folder which has been made up by dragging items from 2 or 3 other folders into it.
It then has some joins of it's own, quite a few.
When trying to create a workbook from it, it takes 9 mins to run a query.
I need to work out what is slowing it down. If I create the same workbook against the folder which has the majority of the items in the custom folder, it runs instantly.
So I suspect it is one of the joins causing it.
My plan was to duplicate the folder, then remove joins until I find out which one is causing it.
However, if I cut n paste the folder, I get a copy without the joins.
If I export the folder and import it I get a copy without the joins.
Question then - how can I get a copy of a folder WITH the joins ?
I'm slightly concerned that when I export my EUL from the dev database and import it into the live database that I'm not going to get any joins since the export and import into the dev database is not retaining the joins.
Anyone ?

Hi,
The preferences for Disco Plus are set in the pref.txt file on the apps server and for Disco Desktop in the Windows Registry. I think the defaults are set on so unless you have changed them this is unlikely to help.
I think I read somewhere that the 11g optimiser will remove unused outer joins or where there is a foreign key constraint. I may have made that last bit up as I cannot find a reference to it, but it may be worth exploring.
To speed things up you could look at why this join is slowing things down. It could be that you need an index on the join column.
The join actually is used, in that it has to check in the other table that a record exists. This is why Discoverer cannot remove the join from the complex folder query. If it did and there where no matching records in the other table then you would get a different result.
Rod West

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