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From Jörn Franke <>
Subject Re: Tableau BI on Spark SQL
Date Mon, 30 Jan 2017 21:51:18 GMT
Depending on the size of the data i recommend to schedule regularly an extract in tableau.
There tableau converts it to an internal in-memory representation outside of Spark (can also
exist on disk if memory is too small) and then use it within Tableau. Accessing directly 
the database is not so efficient. 
Additionally use always the newest version of tableau..

> On 30 Jan 2017, at 21:57, Mich Talebzadeh <> wrote:
> Hi,
> Has anyone tried using Tableau on Spark SQL?
> Specifically how does Tableau handle in-memory capabilities of Spark.
> As I understand Tableau uses its own propriety SQL against say Oracle. That is well established.
So for each product Tableau will try to use its own version of SQL against that product  like
> or Hive.
> However, when I last tried Tableau on Hive, the mapping and performance was not that
good in comparision with the same tables and data in Hive..
> My approach has been to take Oracle 11.g sh schema containing star schema and create
and ingest the same tables and data  into Hive tables. Then run Tableau against these tables
and do the performance comparison. Given that Oracle is widely used with Tableau this test
makes sense?
> Thanks.
> Dr Mich Talebzadeh
> LinkedIn
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