Robert Haas <> writes:
> On Mon, Nov 21, 2016 at 1:00 PM, Tom Lane <> wrote:
>> Hah: not where I thought it was at all.  The problem seems to be down to
>> the optimization I put into is_parallel_safe() awhile back to skip testing
>> anything if we previously found the entire querytree to be parallel-safe.
>> Well, the raw query tree *is* parallel-safe.  It's only when we inject
>> some Params that we have a parallel hazard.  So that optimization is too
>> optimistic :-(

> That sucks.  Any idea how we might salvage it?

I just disabled it by checking to see if any Params have been created.
It might be possible to be more refined, but I dunno that adding more
bookkeeping would pay for itself.

                        regards, tom lane

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