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Posted to dev@calcite.apache.org by "Julian Hyde (Jira)" <ji...@apache.org> on 2020/08/20 21:12:00 UTC

[jira] [Created] (CALCITE-4186) Add ST_Covers, ST_CoveredBy, ST_Relate spatial functions

Julian Hyde created CALCITE-4186:
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             Summary: Add ST_Covers, ST_CoveredBy, ST_Relate spatial functions
                 Key: CALCITE-4186
                 URL: https://issues.apache.org/jira/browse/CALCITE-4186
             Project: Calcite
          Issue Type: Bug
          Components: spatial
            Reporter: Julian Hyde


Add {{ST_Covers}}, {{ST_CoveredBy}}, {{ST_Relate}} spatial functions.

There are [subtle differences between ST_Contains and ST_Covers|http://lin-ear-th-inking.blogspot.com/2007/06/subtleties-of-ogc-covers-spatial.html]; {{ST_Covers}} is usually what you want, and is easier to compute.

Extend the Hilbert spatial index (added in CALCITE-1861) to handle {{ST_Covers}}, {{ST_CoveredBy}}, {{ST_ContainsPropertly}} as it does {{ST_DWithin}} and {{ST_Contains}}.

It might make sense to also implement {{ST_ExteriorRing}} so that we can implement the [PostGIS example|https://postgis.net/docs/ST_Covers.html].



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