Reynold Xin created SPARK-9020:
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Summary: Support mutable state in code gen expressions
Key: SPARK-9020
URL: https://issues.apache.org/jira/browse/SPARK-9020
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
Assignee: Wenchen Fan
Some expressions have state in them (e.g. Rand, MonotonicallyIncreasingID). We
currently don't support code-gen any expressions that have mutable states.
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