pyspark.sql.functions.kll_sketch_to_string_double#

pyspark.sql.functions.kll_sketch_to_string_double(col)[source]#

Returns a string with human readable summary information about the KLL double sketch.

New in version 4.1.0.

Parameters

colColumn or column name: The KLL double sketch binary representation

Returns

Column: A string representation of the sketch.

Examples

>>> from pyspark.sql import functions as sf
>>> df = spark.createDataFrame([1.0,2.0,3.0,4.0,5.0], "DOUBLE")
>>> sketch_df = df.agg(sf.kll_sketch_agg_double("value").alias("sketch"))
>>> result = sketch_df.select(sf.kll_sketch_to_string_double("sketch")).first()[0]
>>> "Kll" in result and "N" in result
True