St Dimension

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ST DIMENSION

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.

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