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ES|QL ST_GEOMETRYTYPE function

Embedded
geometry

Expression of type geo_point, geo_shape, cartesian_point or cartesian_shape. If null, the function returns null.

Returns the geometry type of the supplied geometry, as a string. For example: ST_Point, ST_LineString, ST_Polygon, ST_MultiPoint, ST_MultiLineString, ST_MultiPolygon, or ST_GeometryCollection.

geometry result
cartesian_point keyword
cartesian_shape keyword
geo_point keyword
geo_shape keyword 
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),
       points = ST_NPOINTS(geometry)
| KEEP type, points
type:keyword points:integer
ST_Point 1
ST_LineString 3
ST_Polygon 5