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Returns col2 if col1 is null, or col1 otherwise.
For the corresponding Databricks SQL function, see ifnull function.
Syntax
from pyspark.databricks.sql import functions as dbf
dbf.ifnull(col1=<col1>, col2=<col2>)
Parameters
| Parameter | Type | Description |
|---|---|---|
col1 |
pyspark.sql.Column or str |
The first column to check. |
col2 |
pyspark.sql.Column or str |
The value to return if col1 is null. |
Examples
from pyspark.databricks.sql import functions as dbf
df = spark.createDataFrame([(None,), (1,)], ["e"])
df.select(dbf.ifnull(df.e, dbf.lit(8))).show()
+------------+
|ifnull(e, 8)|
+------------+
| 8|
| 1|
+------------+