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GEOGRAPHY_POINT
Constructor function. This function takes two floats or doubles and returns a GeographyPoint type. Since all of MemSQL’s topological and measurement functions can equally understand WKT strings and geospatial objects, this constructor is mainly for convenience.
Syntax
GEOGRAPHY_POINT ( longitude, latitude )
Arguments
- longitude: float or double describing the longitude in degrees. Values outside of the range [-180, 180] will be wrapped around.
- latitude: float or double describing the latitude in degrees. Values outside of the range [-90, 90] will trigger an error.
Return Type
A GeographyPoint object.
Examples
In this example, we use a “persisted” computed column to create an indexed GeographyPoint from a pair of floats. This technique is useful for bulk-loading geospatial data.
memsql> create table foo (
-> id int unsigned primary key,
-> lon float,
-> lat float,
-> location as geography_point(lon, lat) persisted geographypoint,
-> index(location)
-> );
memsql> insert into foo values (1, 50.01, 40.01);
memsql> select * from foo;
+----+-------+-------+--------------------------------+
| id | lon | lat | location |
+----+-------+-------+--------------------------------+
| 1 | 50.01 | 40.01 | POINT(50.00999831 40.00999832) |
+----+-------+-------+--------------------------------+
1 row in set (0.00 sec)
