APPROX_
Warning
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This function is the fast approximate version of GEOGRAPHY_.
Approximate results are obtained by consulting the geospatial indexes (if any) for matches, and skipping the filter phase which reduces the result set to objects that truly intersect.
Syntax
APPROX_GEOGRAPHY_INTERSECTS ( geo1, geo2 )Arguments
-
geo1, geo2: any valid geospatial object or WKT string: path, point or polygon.
Important
If both geo1 and geo2 are points, this function only returns true if they are identical.
Return Type
Boolean
Examples
SELECT COUNT(1)-> FROM jogging_paths j1, jogging_paths j2-> WHERE-> APPROX_GEOGRAPHY_INTERSECTS(j1.shape, j2.shape);
+----------+
| COUNT(1) |
+----------+
| 11569 |
+----------+SELECT COUNT(1)-> FROM jogging_paths j1, jogging_paths j2-> WHERE-> GEOGRAPHY_INTERSECTS(j1.shape, j2.shape);
+----------+
| COUNT(1) |
+----------+
| 9134 |
+----------+SELECT *FROM neighborhoods WITH (index = shape, resolution = 16)WHERE APPROX_GEOGRAPHY_INTERSECTS(shape,"POLYGON(...)");
Important
The with (index = c, resolution = n) syntax is an optional optimization discussed in Special Spatial Tuning Parameters.
Related Topics
For more information about working with geospatial data, see Working with Geospatial Features.
Last modified: May 3, 2023