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1. You would be creating a .tde file off of your published data source. If that is also an extract then it would be a .tde off of a .tde. If it is a live connection it would be a .tde off of a .tds.
2. You would have another extract that needs to be refreshed at this point. The original and the one you are creating here
3. They would be stored in the workbook. Depending on the type of calculation it may be hardened into an actual column in the new extract that is in your workbook.
I hope this helps. Let me know if you have any questions on my responses.
Thanks for your quick reply.
I just checked, and after downloading it I can see that my original datasource is a .tdsx, as it's an extract with datasource information embedded.
When I click 'download local copy' of the "extract" that I have just created (on top of that published datasource) then it saves as a .tdsx as well, so I guess it is a .tdsx on a .tdsx.
The confusing bit is that when I originally click 'Extract' after connecting to the published datasource
and then click update or click on a worksheet - getting out of the datasource screen - you would expect to be asked where do you want to save this new extract, but that doesn't occur. That's why I'm wondering where is it, what is it?
Hope this makes sense,
This isn't something that I have done before.
Typically when tableau doesn't prompt you for a location, that means there is already an extract that tableau is associating the one you are creating with. So if you create the extract it would just be over writing the older one. But there should be location info on that.
I think your best bet would be to open a support ticket with tableau requesting information on this behavior. Because this does seem really strange.
Ok, will do, thanks for your time.