Re: Patch to fix write after end of array in hashed agg initialization

Andrew Gierth <andrew@tao11.riddles.org.uk> writes:
> My inclination is to fix this in the planner rather than the executor;
> there seems no good reason to actually hash a duplicate column more than
> once.

Sounds reasonable --- but would it make sense to introduce some
assertions, or other cheap tests, into the executor to check that
it's not being given a case it can't handle?

            regards, tom lane