On Tue, Oct 31, 2017 at 3:43 PM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
According to the spec, the elements of a parenthesized SET list should be assigned from the fields of a composite RHS. If there's just one element of the SET list, the RHS should be a single-field composite value, and this syntax should result in extracting its field. This patch doesn't do that; it preserves our previous broken behavior, and thus just puts off the day of reckoning that inevitably will come.
Definitely moderates my opinion in my concurrent email...though postponement is not strictly bad given the seeming frequency of the existing problematic syntax in the wild already.
