Re: Re: Re: Bug: ERROR: invalid cache ID: 42 CONTEXT: parallel worker

On Fri, Aug 24, 2018 at 11:35 AM jimmy <mpokky(at)126(dot)com> wrote:
>
> I create two normal postgresql tables, and import datas from two foreign tables.
> Then I use four normal postgresql tables to query data, and it still throw these errors, after that I am afraid that it maybe is not connection with oracle fdw.
>

So, can we assume that there is no fdw involved in the query that is
generating an error? Can you share the plan (Explain Analyze or
Explain output) of the query?

> In these tables, one table has over 200 fields, and the other two tables, each table has over 800 fields.
> When I use left join, Would that be the problem that caused this.
>

I am not sure but there is no apparent reason why on using some form
of join, it throws such an error. I think we can make better progress
if you get us the call stack of the parallel worker/'s. I can see
above that you have got the call stack, but it is from the master
backend and the error is generated in the parallel worker. Thomas has
already suggested a way to get the call stack, if you can do that, it
would be great. I think we can help you to get the call stack if you
are facing any problem, have you tried getting it?

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