> USING spgist(p);

I'm not an expert on those index implementations but the website lists limitations: https://www.postgresql.org/docs/9.2/static/spgist-implementation.html

Like expected it seems to implement a quadtree to narrow down possible candidates.

This would have been my first choice for a pure Perl solution.

Cheers Rolf
(addicted to the Perl Programming Language :)
Wikisyntax for the Monastery FootballPerl is like chess, only without the dice

In reply to Re^4: searching polygons not merged by LanX
in thread searching polygons not merged by dideod.yang

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