snowflake.snowpark.functions.st_union_agg¶

snowflake.snowpark.functions.st_union_agg(geography_column: Union[snowflake.snowpark.column.Column, str]) → Column[source]¶

Returns the union of all geography objects in a group as a single geography object.

Parameters:

geography_column (ColumnOrName) – The geography objects to union.

Returns:

The union of all geography objects in the group.

Return type:

Column

Examples::
>>> from snowflake.snowpark.functions import to_geography
>>> df = session.create_dataframe([
...     ['POINT(1 1)'],
...     ['POINT(0 1)'],
...     ['LINESTRING(0 0, 0 1)'],
...     ['POLYGON((10 10, 11 11, 11 10, 10 10))']
... ], schema=["g"])
>>> df.select(st_union_agg(to_geography(df["g"])).alias("union_result")).collect()
[Row(UNION_RESULT='{\n  "geometries": [\n    {\n      "coordinates": [\n        9.999999999999998e-01,\n        1.0000000000000...00000000000000e+01\n          ]\n        ]\n      ],\n      "type": "Polygon"\n    }\n  ],\n  "type": "GeometryCollection"\n}')]
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