Ryan Blue created SPARK-18368:
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Summary: Regular expression replace throws NullPointerException
when serialized
Key: SPARK-18368
URL: https://issues.apache.org/jira/browse/SPARK-18368
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 2.0.1, 2.1.0
Reporter: Ryan Blue
This query fails with a [NullPointerException on line
247|https://github.com/apache/spark/blob/master/sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/regexpExpressions.scala#L247]:
{code}
SELECT POSEXPLODE(SPLIT(REGEXP_REPLACE(ranks, '[\\[ \\]]', ''), ',')) AS (rank,
col0)
FROM table;
{code}
The problem is that POSEXPLODE is causing the REGEXP_REPLACE to be serialized
after it is instantiated. The null value is a transient StringBuffer that
should hold the result. The fix is to make the result value lazy.
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