[postgis-users] Improvement suggestion

[Nicolas Ribot]

Hi,

Did you cut your big polygons with st_subdivide before intersecting them ?
It usually speeds up queries by several orders of magnitude.

Nicolas

On Mon, 3 Dec 2018 at 18:41, Paul van der Linden <paul.doskabouter at gmail.com>
wrote:

> I indeed know that trick to eliminate an st_intersection, but that comes
> at the cost of a st_within.
> In the test-case I'm examing now, the st_intersects and st_within both
> take about 40 seconds and the st_intersection takes about a minute.
> So to eliminate one of the 40 seconds (and in this case even the
> intersection because st_within is true), a function returning the relation
> could speed up things
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