kll_sketch_merge_float

Merge deux tampons KLL float sketch en un seul.

Syntaxe

Python

from pyspark.sql import functions as sf

sf.kll_sketch_merge_float(left, right)

parameter

parameter	Type	Description
left	pyspark.sql.Column ou str	Le premier KLL float sketch.
right	pyspark.sql.Column ou str	La deuxième esquisse flottante KLL.

parameter	Type	Description
left	pyspark.sql.Column ou str	Le premier KLL float sketch.
right	pyspark.sql.Column ou str	La deuxième esquisse flottante KLL.

Renvoie

pyspark.sql.Column: L'esquisse KLL fusionnée.

Exemples

Exemple 1 : Merge deux esquisses float KLL

Python

from pyspark.sql import functions as sf
df = spark.createDataFrame([1.0,2.0,3.0,4.0,5.0], "FLOAT")
sketch_df = df.agg(sf.kll_sketch_agg_float("value").alias("sketch"))
result = sketch_df.select(sf.kll_sketch_merge_float("sketch", "sketch")).first()[0]
result is not None and len(result) > 0

Output

True