On Thu, Apr 11, 2019 at 3:27 AM Lars Aksel Opsahl <[email protected]> wrote:
> Can it be problem related ST_Union and aggregate ? > Can you test the performance of aggregate ST_Union on it's own by dropping the GROUP BY and instead using a WHERE clause to union a small-ish subset of the geometries? (But large enough to give a measurable query time.)
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