is_variant_null

Check if a variant value is a variant null. Returns true if and only if the input is a variant null and false otherwise (including in the case of SQL NULL).

Syntax

from pyspark.sql import functions as sf

sf.is_variant_null(v)

Parameters

Parameter	Type	Description
v	pyspark.sql.Column or str	A variant column or column name.

Returns

pyspark.sql.Column: a boolean column indicating whether the variant value is a variant null

Examples

from pyspark.sql import functions as sf
df = spark.createDataFrame([ {'json': '''{ "a" : 1 }'''} ])
df.select(sf.is_variant_null(sf.parse_json(df.json)).alias("r")).collect()

[Row(r=False)]