pyspark.sql.functions.tuple_difference_double#

pyspark.sql.functions.tuple_difference_double(col1, col2)[source]#

Returns the set difference of two Datasketches TupleSketch objects with double summaries (elements in first sketch but not in second).

New in version 4.2.0.

Parameters

col1Column or column name: The first TupleSketch column
col2Column or column name: The second TupleSketch column

Returns

Column: The binary representation of the difference TupleSketch.

See also

pyspark.sql.functions.tuple_sketch_agg_double()
pyspark.sql.functions.tuple_union_double()
pyspark.sql.functions.tuple_intersection_double()

Examples

>>> from pyspark.sql import functions as sf
>>> df = spark.createDataFrame([(1, 10.0, 4, 40.0), (2, 20.0, 4, 40.0), (3, 30.0, 5, 50.0), (4, 40.0, 5, 50.0)], ["key1", "v1", "key2", "v2"])  # noqa
>>> df = df.agg(
...     sf.tuple_sketch_agg_double("key1", "v1").alias("sketch1"),
...     sf.tuple_sketch_agg_double("key2", "v2").alias("sketch2")
... )
>>> df.select(sf.tuple_sketch_estimate_double(sf.tuple_difference_double(df.sketch1, "sketch2"))).show()  # noqa
+-----------------------------------------------------------------------+
|tuple_sketch_estimate_double(tuple_difference_double(sketch1, sketch2))|
+-----------------------------------------------------------------------+
|                                                                    3.0|
+-----------------------------------------------------------------------+