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Improve description of num_geometries() expression function to explicitly state support for multi-part geometries

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Mathieu Pellerin 2022-03-22 12:03:39 +07:00 committed by Nyall Dawson
parent 26afd39ef2
commit 37abd1b5c4
1 changed files with 5 additions and 2 deletions
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7
resources/function_help/json/num_geometries
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@ -2,14 +2,17 @@
"name": "num_geometries",
"type": "function",
"groups": ["GeometryGroup"],
"description": "Returns the number of geometries in a geometry collection, or NULL if the input geometry is not a collection.",
"description": "Returns the number of geometries in a geometry collection, or the number of parts in a multi-part geometry. The function returns NULL if the input geometry is not a collection.",
"arguments": [{
"arg": "geometry",
"description": "geometry collection"
"description": "geometry collection or multi-part geometry"
}],
"examples": [{
"expression": "num_geometries(geom_from_wkt('GEOMETRYCOLLECTION(POINT(0 1), POINT(0 0), POINT(1 0), POINT(1 1))'))",
"returns": "4"
},{
"expression": "num_geometries(geom_from_wkt('MULTIPOINT((0 1), (0 0), (1 0))'))",
"returns": "3"
}],
"tags": ["collection", "multipart", "parts", "count"]
}