On Wed, Apr 12, 2017 at 12:40 AM, Tom Lane <t...@sss.pgh.pa.us> wrote: > Amit Kapila <amit.kapil...@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
push-parallel-safe-subplans-workers_v1.patch
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