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From "Gabor Somogyi (JIRA)" <j...@apache.org>
Subject [jira] [Resolved] (SPARK-26845) Avro to_avro from_avro roundtrip fails if data type is string
Date Fri, 08 Feb 2019 20:36:00 GMT

     [ https://issues.apache.org/jira/browse/SPARK-26845?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]

Gabor Somogyi resolved SPARK-26845.
-----------------------------------
    Resolution: Not A Problem

> Avro to_avro from_avro roundtrip fails if data type is string
> -------------------------------------------------------------
>
>                 Key: SPARK-26845
>                 URL: https://issues.apache.org/jira/browse/SPARK-26845
>             Project: Spark
>          Issue Type: Bug
>          Components: SQL
>    Affects Versions: 2.4.0, 3.0.0
>            Reporter: Gabor Somogyi
>            Priority: Critical
>              Labels: correctness
>
> I was playing with AvroFunctionsSuite and created a situation where test fails which
I believe it shouldn't:
> {code:java}
>   test("roundtrip in to_avro and from_avro - string") {
>     val df = spark.createDataset(Seq("1", "2", "3")).select('value.cast("string").as("str"))
>     val avroDF = df.select(to_avro('str).as("b"))
>     val avroTypeStr = s"""
>       |{
>       |  "type": "string",
>       |  "name": "str"
>       |}
>     """.stripMargin
>     checkAnswer(avroDF.select(from_avro('b, avroTypeStr)), df)
>   }
> {code}
> {code:java}
> == Results ==
> !== Correct Answer - 3 ==   == Spark Answer - 3 ==
> !struct<str:string>         struct<from_avro(b):string>
> ![1]                        []
> ![2]                        []
> ![3]                        []
> {code}



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