On Wed, Nov 30, 2016 at 11:57 PM, Robert Haas <robertmh...@gmail.com> wrote:
> On Tue, Nov 29, 2016 at 6:24 AM, Amit Kapila <amit.kapil...@gmail.com> wrote:
>> Robert, do you have any better ideas for this problem?
> Not really. I think your prepared_stmt_parallel_query_v2.patch is
> probably the best approach proposed so far, but I wonder why we need
> to include DestCopyOut and DestTupleStore. DestIntoRel and
> DestTransientRel both write to an actual relation, which is a problem
> for parallel mode, but I think the others don't.
I have tried to restrict all the non-readonly operation modes or modes
where parallelism might not make sense like DestTupleStore. If we
want to just prohibit the cases where it can fail now, then I think
prohibiting only DestIntoRel should be sufficient because that is a
case where the user is allowed to do DDL for an already prepared read
only statement like Create Table AS .. EXECUTE.
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