[SPARK-20335] [SQL] [BACKPORT-2.1] Children expressions of Hive UDF impacts the determinism of Hive UDF #17652
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Test build #75842 has finished for PR 17652 at commit
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asfgit
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Apr 17, 2017
…acts the determinism of Hive UDF ### What changes were proposed in this pull request? This PR is to backport #17635 to Spark 2.1 --- ```JAVA /** * Certain optimizations should not be applied if UDF is not deterministic. * Deterministic UDF returns same result each time it is invoked with a * particular input. This determinism just needs to hold within the context of * a query. * * return true if the UDF is deterministic */ boolean deterministic() default true; ``` Based on the definition of [UDFType](https://github.com/apache/hive/blob/master/ql/src/java/org/apache/hadoop/hive/ql/udf/UDFType.java#L42-L50), when Hive UDF's children are non-deterministic, Hive UDF is also non-deterministic. ### How was this patch tested? Added test cases. Author: Xiao Li <[email protected]> Closes #17652 from gatorsmile/backport-17635.
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thanks, merging to 2.1! |
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What changes were proposed in this pull request?
This PR is to backport #17635 to Spark 2.1
Based on the definition of UDFType, when Hive UDF's children are non-deterministic, Hive UDF is also non-deterministic.
How was this patch tested?
Added test cases.