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Fixed #22423 -- Added support for MySQL operators on real geometries.

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Thanks Viswanathan Mahalingam for the report and initial patch, and
Nicke Pope and Tim Graham for the review.
This commit is contained in:
Claude Paroz 2019-01-19 15:28:42 +01:00 • committed by Tim Graham
parent 8cf9dbee6a
commit 15715bf2a2
8 changed files with 85 additions and 55 deletions
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20
docs/ref/contrib/gis/db-api.txt
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@ -25,21 +25,15 @@ GeoDjango currently provides the following spatial database backends:
MySQL Spatial Limitations
-------------------------
MySQL's spatial extensions only support bounding box operations
(what MySQL calls minimum bounding rectangles, or MBR). Specifically,
`MySQL does not conform to the OGC standard
<https://dev.mysql.com/doc/refman/en/spatial-relation-functions.html>`_:
Before MySQL 5.6.1, spatial extensions only support bounding box operations
(what MySQL calls minimum bounding rectangles, or MBR). Specifically, MySQL did
not conform to the OGC standard. Django supports spatial functions operating on
real geometries available in modern MySQL versions. However, the spatial
functions are not as rich as other backends like PostGIS.
Currently, MySQL does not implement these functions
[``Contains``, ``Crosses``, ``Disjoint``, ``Intersects``, ``Overlaps``,
``Touches``, ``Within``]
according to the specification. Those that are implemented return
the same result as the corresponding MBR-based functions.
.. versionchanged:: 3.0
In other words, while spatial lookups such as :lookup:`contains <gis-contains>`
are available in GeoDjango when using MySQL, the results returned are really
equivalent to what would be returned when using :lookup:`bbcontains`
on a different spatial backend.
Support for spatial functions operating on real geometries was added.
.. warning::