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[SPARK-10417][SQL] Iterating through Column results in infinite loop #8574

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[SPARK-10417][SQL] Iterating through Column results in infinite loop #8574

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[SPARK-10417][SQL] Iterating through Column results in infinite loop
0x0FFF Sep 2, 2015
f041635
[SPARK-10417][SQL] Change error message and use assertRaises for unit…
0x0FFF Sep 2, 2015
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4 changes: 4 additions & 0 deletions python/pyspark/sql/column.py
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Original file line number Diff line number Diff line change
Expand Up @@ -226,6 +226,10 @@ def __getattr__(self, item):
raise AttributeError(item)
return self.getField(item)

def __iter__(self):
raise TypeError('%s.%s object is not iterable' % (self.__module__,
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I think "Column is not iterable" is a good enough error message.

self.__class__.__name__))

# string methods
rlike = _bin_op("rlike")
like = _bin_op("like")
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10 changes: 10 additions & 0 deletions python/pyspark/sql/tests.py
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Expand Up @@ -1066,6 +1066,16 @@ def test_with_column_with_existing_name(self):
keys = self.df.withColumn("key", self.df.key).select("key").collect()
self.assertEqual([r.key for r in keys], list(range(100)))

# regression test for SPARK-10417
def test_column_iterator(self):
# Catch exception raised during improper construction
try:
for x in self.df.key:
break
self.assertEqual(0, 1)
except TypeError:
self.assertEqual(1, 1)
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you can use assertRaises to test the exception case.



class HiveContextSQLTests(ReusedPySparkTestCase):

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