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How Tableau deal with Data?

Posted July 9th, 2008 by xiogxiog
in Data Sources and Performance Tableau Desktop Basics

in the last thread Marc said "Tableau does not import the data from the original datasource - it merely processes and displays the results from queries sent to the original datasource.
"

I want to ask if Tableau send query to original datasource everytime when I do drag / drop manipulation?

if the answser is yes I think that may be cause some performance problem for query the same datasource so many times

if the answser is no , then , how does it work?
Does the query dataset be loaded to the client?

I holp someone can explain the mechanism that Tableau deal with the data?

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Comments

On July 9th, 2008 James Baker said:

If you've got a slow database, you can turn the "Auto Update" flag off in Tableau, perform several drag & drop manipulations, and then trigger a query/refresh yourself.

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On July 17th, 2008 Ross Bunker said:

Tableau also caches the results of queries and uses that whenever possible

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