On 2015-05-08 20:37:15 +0300, Heikki Linnakangas wrote:
> Why does INSERT ON CONFLICT pay attention to indcheckxmin? Uniqueness check
> only cares about the most recent committed version of the tuple, and the
> index good for that use immediately. If there was a problem there, the
> uniqueness check in a normal insert have the same problem.
Yea, that's a good angle to view this from. That'd not be the case, I
think, if we'd allow this to be used on system relations. But since
neither creating an index on system relations, nor using INSERT ON
CONFLICT on them is supported...
Greetings,
Andres Freund
