Warning
SingleStore 9.0 gives you the opportunity to preview, evaluate, and provide feedback on new and upcoming features prior to their general availability. In the interim, SingleStore 8.9 is recommended for production workloads, which can later be upgraded to SingleStore 9.0.
APPROX_
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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