Sandeep Singh created SPARK-41905:
-------------------------------------
Summary: Function `slice` should expect string in params
Key: SPARK-41905
URL: https://issues.apache.org/jira/browse/SPARK-41905
Project: Spark
Issue Type: Sub-task
Components: Connect
Affects Versions: 3.4.0
Reporter: Sandeep Singh
{code:java}
from pyspark.sql import Window
from pyspark.sql.functions import nth_value
df = self.spark.createDataFrame(
[
("a", 0, None),
("a", 1, "x"),
("a", 2, "y"),
("a", 3, "z"),
("a", 4, None),
("b", 1, None),
("b", 2, None),
],
schema=("key", "order", "value"),
)
w = Window.partitionBy("key").orderBy("order")
rs = df.select(
df.key,
df.order,
nth_value("value", 2).over(w),
nth_value("value", 2, False).over(w),
nth_value("value", 2, True).over(w),
).collect()
expected = [
("a", 0, None, None, None),
("a", 1, "x", "x", None),
("a", 2, "x", "x", "y"),
("a", 3, "x", "x", "y"),
("a", 4, "x", "x", "y"),
("b", 1, None, None, None),
("b", 2, None, None, None),
]
for r, ex in zip(sorted(rs), sorted(expected)):
self.assertEqual(tuple(r), ex[: len(r)]){code}
{code:java}
Traceback (most recent call last):
File
"/Users/s.singh/personal/spark-oss/python/pyspark/sql/tests/test_functions.py",
line 755, in test_nth_value
self.assertEqual(tuple(r), ex[: len(r)])
AssertionError: Tuples differ: ('a', 1, 'x', None) != ('a', 1, 'x', 'x')
First differing element 3:
None
'x'
- ('a', 1, 'x', None)
? ^^^^
+ ('a', 1, 'x', 'x')
? ^^^
{code}
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