[jira] [Created] (SPARK-27027) from_avro function does not deserialize the Avro record of a struct column type correctly

["Hien Luu (JIRA)" <ji...@apache.org>]

Hien Luu created SPARK-27027:
--------------------------------

             Summary: from_avro function does not deserialize the Avro record of a struct column type correctly
                 Key: SPARK-27027
                 URL: https://issues.apache.org/jira/browse/SPARK-27027
             Project: Spark
          Issue Type: Bug
          Components: SQL
    Affects Versions: 2.4.0
            Reporter: Hien Luu


from_avro function produces wrong output of a struct field.  See the output at the bottom of the description

=====================================================

import org.apache.spark.sql.types._
import org.apache.spark.sql.avro._
import org.apache.spark.sql.functions._


spark.version

val df = Seq((1, "John Doe", 30), (2, "Mary Jane", 25), (3, "Josh Duke", 50)).toDF("id", "name", "age")

val dfStruct = df.withColumn("value", struct("name","age"))

dfStruct.show
dfStruct.printSchema

val dfKV = dfStruct.select(to_avro('id).as("key"), to_avro('value).as("value"))

val expectedSchema = StructType(Seq(StructField("name", StringType, true),StructField("age", IntegerType, false)))

val avroTypeStruct = SchemaConverters.toAvroType(expectedSchema).toString

val avroTypeStr = s"""
 |{
 | "type": "int",
 | "name": "key"
 |}
 """.stripMargin


dfKV.select(from_avro('key, avroTypeStr)).show
dfKV.select(from_avro('value, avroTypeStruct)).show

// output for the last statement and that is not correct
+---------------------------------------------+
|from_avro(value, struct<name:string,age:int>)|
+---------------------------------------------+
| [Josh Duke, 50]|
| [Josh Duke, 50]|
| [Josh Duke, 50]|
+---------------------------------------------+



--
This message was sent by Atlassian JIRA
(v7.6.3#76005)

---------------------------------------------------------------------
To unsubscribe, e-mail: issues-unsubscribe@spark.apache.org
For additional commands, e-mail: issues-help@spark.apache.org