Justin Pryzby writes:
> On Mon, Dec 30, 2019 at 02:18:17PM -0500, Tom Lane wrote:
>> This answer is simply broken. You've caused it to estimate half
>> of the bucket, which is an insane estimate for the given bucket
>> boundaries and WHERE constraint.
> I'm fine if the isnan() logic changes,
On Mon, Dec 30, 2019 at 02:18:17PM -0500, Tom Lane wrote:
> > On v12, my test gives:
> > |DROP TABLE t; CREATE TABLE t(t) AS SELECT generate_series(now(), now()+'1
> > day', '5 minutes');
> > |INSERT INTO t VALUES('-infinity');
> > |ALTER TABLE t ALTER t SET STATISTICS 1; ANALYZE t;
> > |explain
Justin Pryzby writes:
> On Mon, Dec 30, 2019 at 09:05:24AM -0500, Tom Lane wrote:
>> Uh, what? This seems completely wrong to me. We could possibly
>> promote DT_NOBEGIN and DT_NOEND to +/- infinity (not NaN), but
>> I don't really see the point. They'll compare to other timestamp
>> values
On Mon, Dec 30, 2019 at 09:05:24AM -0500, Tom Lane wrote:
> Justin Pryzby writes:
> > That seems to be only used for ineq_histogram_selectivity() interpolation of
> > histogram bins. It looks to me that at least isn't working for "special
> > values", and needs to use something other than
Justin Pryzby writes:
> selfuncs.c convert_to_scalar() says:
> |* The several datatypes representing absolute times are all converted
> |* to Timestamp, which is actually a double, and then we just use that
> |* double value.
> So I propose it should say something like:
> |* The several
selfuncs.c convert_to_scalar() says:
|* The several datatypes representing absolute times are all converted
|* to Timestamp, which is actually a double, and then we just use that
|* double value. Note this will give correct results even for the "special"
|* values of Timestamp, since those are
