Re: BUG #15324: Non-deterministic behaviour from parallelised sub-query

On Mon, Aug 20, 2018 at 4:20 PM, Amit Kapila <amit.kapila16@gmail.com> wrote:
> On Thu, Aug 16, 2018 at 9:25 AM, Amit Kapila <amit.kapila16@gmail.com> wrote:
>> On Wed, Aug 15, 2018 at 4:40 PM, Stephen Frost <sfrost@snowman.net> wrote:
>> (b) Consider the presence of any window function calculation as
>> parallel-restricted operation.
>>
>
> For this, we need to mark all the window functions like row_number,
> rank, dense_rank, etc as parallel-restricted.   Additionally, we also
> need to detect the presence of aggregate functions that act as window
> functions (when an OVER clause follows the call).   Attached patch
> treat_window_func_calc_parallel_restricted_v1 implements the fix.
>

As this patch changes the catalog contents, we need to bump catalog
version number.  However, I have left it for later once we get a
review and or testing of the patch.

-- 
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com