Stephen Boesch 2013-08-20, 23:15
Ricky Saltzer 2013-08-21, 02:05
Stephen Boesch 2013-08-21, 02:15
Ricky Saltzer 2013-08-21, 02:18
-Re: Any Scenarios in which Views impose performance penalties
Edward Capriolo 2013-08-21, 02:40
Views are logical . The view is compiled and has no penalty over the
On Tuesday, August 20, 2013, Ricky Saltzer <[EMAIL PROTECTED]> wrote:
> Since this bug was in Impala's query planner, I'm sure Hive is unaffected.
> On Aug 20, 2013 10:15 PM, "Stephen Boesch" <[EMAIL PROTECTED]> wrote:
>> Thanks v much Ricky. Is this fixed in hive 0.11 - or going to be later
>> 2013/8/20 Ricky Saltzer <[EMAIL PROTECTED]>
>>> Although this is already fixed in the next and upcoming impala release,
you might want to be aware of the following view limitation.
>>> On Aug 20, 2013 7:16 PM, "Stephen Boesch" <[EMAIL PROTECTED]> wrote:
>>>> Views should theoretically not incur performance penalties: they
simply represent queries. Are there situtions that things are "not that
simple" - i.e. views may actually result in different exeucution plans than
the underlying sql?
>>>> Additionally, are there views-related bugs that we should be aware of
that would limit the occasions that we could use them?
>>>> Thanks for the pointers.
Ricky Saltzer 2013-08-21, 02:43
Stephen Boesch 2013-08-21, 02:55