Richard Guo <guofenglinux@gmail.com> writes:
> At first I was wondering if we need to check whether HashState.hashtable
> is not NULL in ExecShutdownHash() before we decide to allocate save
> space for HashState.hinstrument. And then I convinced myself that that's
> not necessary since HashState.hinstrument and HashState.hashtable cannot
> be both NULL there.
Even if the hashtable is null at that point, creating an all-zeroes
hinstrument struct is harmless.
regards, tom lane