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The optimizer investigates whether available spatial indexes can
be involved in the search for queries that use a function such
as MBRContains() or
MBRWithin() in the
WHERE clause. The following query finds all
objects that are in the given rectangle:
Executing the SELECT statement
without the spatial index yields the same result but causes the
execution time to rise from 0.00 seconds to 0.46 seconds:
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Document created the 26/06/2006, last modified the 26/10/2018 Source of the printed document:https://www.gaudry.be/en/mysql-rf-using-spatial-indexes.html
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