Re: [POC] Faster processing at Gather node

On Fri, Nov 10, 2017 at 9:48 AM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
> On Fri, Nov 10, 2017 at 8:36 AM, Robert Haas <robertmhaas(at)gmail(dot)com> wrote:
>> On Thu, Nov 9, 2017 at 9:31 PM, Amit Kapila <amit(dot)kapila16(at)gmail(dot)com> wrote:
>>> Have you set force_parallel_mode=regress; before running the
>>> statement?
>>
>> Yes, I tried that first.
>>
>>> If so, then why you need to tune other parallel query
>>> related parameters?
>>
>> Because I couldn't get it to break the other way, I then tried this.
>>
>> Instead of asking me what I did, can you tell me what I need to do?
>> Maybe a self-contained reproducible test case including exactly what
>> goes wrong on your end?
>>
>
> I think we are missing something very basic because you should see the
> failure by executing that statement in force_parallel_mode=regress
> even in a freshly created database.
>

I am seeing the assertion failure as below on executing the above
mentioned Create statement:

TRAP: FailedAssertion("!(!(tup->t_data->t_infomask & 0x0008))", File:
"heapam.c", Line: 2634)
server closed the connection unexpectedly
This probably means the server terminated abnormally

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