Comments on: Want To Crash Teradata? Give It Some LOV…

By: Dave Rathbun

Dave Rathbun — Thu, 25 Mar 2010 03:46:18 +0000

Hi, Boris, and thanks for your question. I understand why you asked but I can tell you that the BOXI version is of no consequence as we were able to cause the exact same issue by running the SQL via SQL Assistant. The major version for Teradata was 13; I don’t know what fix level we were using at the time.

By: Boris

Boris — Wed, 24 Mar 2010 20:52:09 +0000

Dave — interesting problem. Can you please post the exact system information:
DBS version (including e-fix) and OS
ODBC version and OS
BOXI version and OS
This may help everyone!

By: Dave Rathbun

Dave Rathbun — Fri, 12 Mar 2010 23:15:12 +0000

Hi, Kuldeep, thank you for your question. To this point in my career I have never managed to work with Netezza. Given that, I don’t expect to write much if anything about it.

By: Kuldeep

Kuldeep — Fri, 12 Mar 2010 10:28:54 +0000

Dave, Just wanted to know if you ever tried connecting BO to Netezza, If yes Do you plan to write on this topic.

By: Dave Rathbun

Dave Rathbun — Thu, 04 Mar 2010 00:25:35 +0000

We have run into a snag, of course. Some of the LOV definitions in another universe use the ability to “sort by” an object that does not exist in the select clause. This results in invalid SQL once the distinct is removed and the group by is added because the additional column does not show up in the group by clause…

No solution yet.

By: Dave Rathbun

Dave Rathbun — Mon, 01 Mar 2010 16:50:58 +0000

Thani, welcome and thank you for your comment. The parameter does, in fact, change the behavior of the “retrieve duplicate rows” option. It will also use a GROUP BY rather than a DISTINCT. The net result should be the same.

By: Dave Rathbun

Dave Rathbun — Mon, 01 Mar 2010 16:48:23 +0000

I am not aware of a method to exclude any LOV from this sort parameter.

By: Yoav

Yoav — Mon, 01 Mar 2010 08:10:53 +0000

Thanks for the clarification,

The parameter will be global and you can’t exclude a specific LOV object out of it, right ?

Yoav

By: Thani

Thani — Mon, 01 Mar 2010 06:09:13 +0000

Hi Dave,

By changing this Universe parameter DISTINCT=GROUPBY, will this not affect the report queries as well or just to LOV query.
And how does the “Retrieve duplicate rows” WebI property will work by un-checking it?

Thanks.

By: Dave Rathbun

Dave Rathbun — Sun, 28 Feb 2010 15:19:12 +0000

Hi, Yoav, that’s quite a story.

The main difference between sorting an LOV and the FORCE_SORTED_LOV is that the second choice does every LOV at once. In order to apply a sort on each query, I would have to open each query and apply a sort. It’s much faster with the universe parameter.