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  1. Spark
  2. SPARK-32154

Use ExpressionEncoder for the return type of ScalaUDF to convert to catalyst type

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    Details

    • Type: Improvement
    • Status: Resolved
    • Priority: Major
    • Resolution: Fixed
    • Affects Version/s: 3.1.0
    • Fix Version/s: 3.1.0
    • Component/s: SQL
    • Labels:
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      Description

      Users now could register a UDF with Instant/LocalDate as return type even with 

      spark.sql.datetime.java8API.enabled=false. However, the UDF can only be really used with spark.sql.datetime.java8API.enabled=true. This could make users confused.

      The problem is we use ExpressionEncoder to ser/deser types when registering the UDF, but use Catalyst converters to ser/deser types, which is under control of  spark.sql.datetime.java8API.enabled,  when executing UDF.

      If we could also use ExpressionEncoder to ser/deser types, similar to what we do for input parameter types, the, UDF could support Instant/LocalDate, event other combined complex types as well.

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            • Assignee:
              Ngone51 wuyi
              Reporter:
              Ngone51 wuyi
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                Updated:
                Resolved: