On Tue, May 12, 2015 at 7:22 PM, Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:
> MinMaxExpr is an implicit invocation of a btree comparison function.
> Are we supposing that all of those are necessarily leakproof?
I suspect it's an oversight, because the comment gives no hint that
any such intention was present. It's been more than three years since
I committed that code (under a different function name) so my memory
is a little fuzzy, but I believe it just didn't occur to me that
MinMaxExpr could include a function call.
I suspect it's safe in practice, but in theory it's probably a bug.
--
Robert Haas
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