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  1. Spark
  2. SPARK-20586

Add deterministic to ScalaUDF

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    Details

    • Type: Bug
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 2.2.0
    • Fix Version/s: 2.3.0
    • Component/s: SQL
    • Labels:
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    • Target Version/s:

      Description

      https://hive.apache.org/javadocs/r2.0.1/api/org/apache/hadoop/hive/ql/udf/UDFType.html

      Like Hive UDFType, we should allow users to add the extra flags for ScalaUDF too. stateful/impliesOrder are not applicable to ScalaUDF. Thus, we only add the following two flags.

      • deterministic: 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.

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            • Assignee:
              smilegator Xiao Li
              Reporter:
              smilegator Xiao Li

              Dates

              • Created:
                Updated:
                Resolved:

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