ES|QL ST_DIMENSION function
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Serverless
Preview
Preview
Stack
Preview
9.4+
Preview since 9.4
Returns the topological dimension of the supplied geometry.
geometry-
Expression of type
geo_point,geo_shape,cartesian_pointorcartesian_shape. Ifnull, the function returnsnull.
Returns the topological dimension of the supplied geometry. Points and multi-points return 0, lines and multi-lines return 1, polygons and multi-polygons return 2, and geometry collections return the maximum dimension of their components.
| geometry | result |
|---|---|
| cartesian_point | integer |
| cartesian_shape | integer |
| geo_point | integer |
| geo_shape | integer |
ROW wkt = [
"POINT(1.0 2.0)",
"LINESTRING (30 10, 10 30, 40 40)",
"POLYGON ((30 10, 40 40, 20 40, 10 20, 30 10))"]
| MV_EXPAND wkt
| EVAL geometry = TO_GEOSHAPE(wkt),
type = ST_GEOMETRYTYPE(geometry),
topological_dimension = ST_DIMENSION(geometry)
| KEEP type, topological_dimension
| type:keyword | topological_dimension:integer |
|---|---|
| ST_Point | 0 |
| ST_LineString | 1 |
| ST_Polygon | 2 |