Re: IMMUTABLE and PARALLEL SAFE function markings

On Mon, Nov 26, 2018 at 8:49 PM Andrew Gierth
<andrew@tao11.riddles.org.uk> wrote:
> I'm a bit more concerned by the fact that inlining the function isn't
> affecting the parallel safety of the query - the fact that parallel
> safety is being checked prior to inlining means that if inlining
> *introduces* a parallel hazard, it will go unnoticed?

If a function is marked parallel-safe but internally calls
parallel-restricted or parallel-unsafe functions, it wasn't really
parallel-safe in the first place.  So I think that if inlining
introduces a parallel hazard, the user has mislabeled some functions
and any resulting injury is self-inflicted.

-- 
Robert Haas
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