On Wed, Apr 12, 2017 at 12:40 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Amit Kapila <amit.kapila16@gmail.com> writes:
>
>> However, the worker will
>> never execute such a plan as we don't generate a plan where unsafe
>> sublan/initplan is referenced in the node passed to the worker. If we
>> want to avoid passing parallel-unsafe subplans to workers, then I
>> think we can maintain a list of parallel safe subplans along with
>> subplans in PlannerGlobal and PlannedStmt or maybe keep a parallel
>> safe flag in Plan so that we can pass only parallel safe plans to
>> workers.
>
> Right, we could, say, leave a hole in the subplan list corresponding
> to any subplan that's not parallel-safe. That seems like a good idea
> anyway because right now there's clearly no cross-check preventing
> a worker from trying to run such a subplan.
>
> Anyone want to draft a patch for this?
>
Please find patch attached based on above discussion.
--
With Regards,
Amit Kapila.
EnterpriseDB: http://www.enterprisedb.com
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