(mysql.info.gz) GIS features that are not yet implemented

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(mysql.info.gz) MySQL GIS conformance and compatibility

(mysql.info.gz) MySQL GIS conformance and compatibility

 
 18.7.1 GIS Features That Are Not Yet Implemented
 ------------------------------------------------
 
 Additional Metadata Views
      OpenGIS specifications propose several additional metadata views.
      For example, a system view named `GEOMETRY_COLUMNS' contains a
      description of geometry columns, one row for each geometry column
      in the database.
 
 The OpenGIS function `Length()' on `LineString' and `MultiLineString' currently should be called in MySQL as `GLength()'
      The problem is that there is an existing SQL function `Length()'
      which calculates the length of string values, and sometimes it is
      not possible to distinguish whether the function is called in a
      textual or spatial context. We need either to solve this somehow,
      or decide on another function name.
 

Info Catalog

(mysql.info.gz) MySQL GIS conformance and compatibility

(mysql.info.gz) MySQL GIS conformance and compatibility