st_aswkt function

Applies to: Databricks SQL Databricks Runtime 17.1 and above

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注記

This feature is not available on Databricks SQL Classic warehouses. To learn more about Databricks SQL warehouses, see SQL warehouse types

Returns the input GEOGRAPHY or GEOMETRY value in WKT format.

Syntax

st_aswkt ( geoExpr )

Arguments

• geoExpr: A GEOGRAPHY or GEOMETRY value.

Returns

A value of type STRING. The returned value is the WKT description of the input GEOGRAPHY or GEOMETRY value.

The function returns NULL if the input is NULL.

Examples

SQL

-- Export a 3DZ Cartesian point, given in GeoJSON format, in WKT format.
> SELECT st_aswkt(to_geometry('{"type":"Point","coordinates":[2.718281828,3.141592653,100]}'));
  POINT Z (2.718281828 3.141592653 100)

-- Export a 3DZ geographic point, given in GeoJSON format, in WKT format.
> SELECT st_aswkt(to_geography('{"type":"Point","coordinates":[2.718281828,3.141592653,100]}'));
  POINT Z (2.718281828 3.141592653 100)

Related functions

• st_asbinary function
• st_asewkb function
• st_asewkt function
• st_asgeojson function
• st_aswkb function
• st_geogfromgeojson function
• st_geogfromtext function
• st_geogfromwkb function
• st_geogfromwkt function
• st_geomfromewkb function
• st_geomfromgeojson function
• st_geomfromtext function
• st_geomfromwkb function
• st_geomfromwkt function
• to_geography function
• to_geometry function
• try_to_geography function
• try_to_geometry function