Xinyi Yu created SPARK-48718:
--------------------------------
Summary: Got incastable error when deserializer in cogroup is
resolved during application of DeduplicateRelation rule
Key: SPARK-48718
URL: https://issues.apache.org/jira/browse/SPARK-48718
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 4.0.0
Reporter: Xinyi Yu
When running the following commands:
{code:java}
val lhs = spark.createDataFrame(
List(Row(123L)).asJava,
StructType(Seq(StructField("GROUPING_KEY", LongType)))
)
val rhs = spark.createDataFrame(
List(Row(0L, 123L)).asJava,
StructType(Seq(StructField("ID", LongType), StructField("GROUPING_KEY",
LongType)))
) val lhsKV = lhs.groupByKey((r: Row) => r.getAs[Long]("GROUPING_KEY"))
val rhsKV = rhs.groupByKey((r: Row) => r.getAs[Long]("GROUPING_KEY"))
val cogrouped = lhsKV.cogroup(rhsKV)(
(a: Long, b: Iterator[Row], c: Iterator[Row]) => Iterator(0L)
)
val joined = rhs.join(cogrouped, col("ID") === col("value"), "left") {code}
It gets an error:
{code:java}
java.lang.ClassCastException:
org.apache.spark.sql.catalyst.expressions.objects.AssertNotNull cannot be cast
to org.apache.spark.sql.catalyst.analysis.UnresolvedDeserializer {code}
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