st_ndims function

Applies to: Databricks Runtime 17.1 and above

Preview

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Returns the coordinate dimension of the input GEOGRAPHY or GEOMETRY value.

Syntax

st_ndims ( geoExpr )

Arguments

• geoExpr: A GEOGRAPHY or GEOMETRY value.

Returns

A value of type INT, representing the coordinate dimension of the input GEOGRAPHY or GEOMETRY value.

The function returns NULL if the input is NULL.

Examples

SQL

-- Returns the number of dimensions of a 2D point geometry.
> SELECT st_ndims(st_geomfromtext('POINT(10 34)'));
  2
-- Returns the number of dimensions of a 3D point geometry.
> SELECT st_ndims(st_geomfromgeojson('{"type":"Point","coordinates":[10,34,55]}'));
  3
-- Returns the number of dimensions of a 3D point geography.
> SELECT st_ndims(st_geogfromtext('POINT M (10 34 48)'));
  3
-- Returns the number of dimensions of a 4D point geography.
> SELECT st_ndims(st_geogfromtext('POINT ZM (10 34 48 -24)'));
  4

Related functions

• st_dimension function