pyspark.sql.functions.ifnull

pyspark.sql.functions.ifnull(col1: ColumnOrName, col2: ColumnOrName) → pyspark.sql.column.Column

Returns col2 if col1 is null, or col1 otherwise.

New in version 3.5.0.

Parameters

col1Column or str

col2Column or str

Examples

>>> import pyspark.sql.functions as sf
>>> df = spark.createDataFrame([(None,), (1,)], ["e"])
>>> df.select(sf.ifnull(df.e, sf.lit(8))).show()
+------------+
|ifnull(e, 8)|
+------------+
|           8|
|           1|
+------------+

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