I think Tableau also uses the first query to fetch the structure /
metadata of the expected result set.
We have often eliminated performance issues using Tableau by "hiding"
the structure of queries by putting them in database views. Could that
be a possible solution here?
On 17 Aug 2015, at 11:02, Boris Chmiel wrote:
Hello Driller,
I'm facing issues using the Filter function of Tableau with Drill :
Tableau always populates values of the filter with "null".The action
is translated into 2 queries within Drill :
SELECT \* FROM (SELECT field FROM Table GROUP BY field ORDER BY field
ASC) T LIMIT 0
SELECT field FROM Table GROUP BY field ORDER BY field ASC
It seems that Tableau is fetching the result of the first query (null
- which seems to by generated to catch exceptions) instead of the
second one.
Anyone already met this issue ? Is there a workaround or customization
parameter to ajust ?
conf : Tableau v9.0 + MapRDrillODBC driver with TDC file
deployedDrill V1.1.0
