On 8/6/15 3:36 PM, Tom Lane wrote:
> Further fixes for degenerate outer join clauses.
The <=9.2 versions of this change introduce a new compiler warning:
variable ‘unique_ified’ set but not used [-Wunused-but-set-variable]
This variable is apparently only used in 9.3+ for some LATERAL stuff, so
it could probably be removed in 9.2.