Derk Crezee created SPARK-35309:
-----------------------------------
Summary: array transform should respect alias in expression
Key: SPARK-35309
URL: https://issues.apache.org/jira/browse/SPARK-35309
Project: Spark
Issue Type: Bug
Components: SQL
Affects Versions: 3.1.0
Reporter: Derk Crezee
When an array is transformed using the transform function in combination with
an alias, I get an unexpected column name.
{code:scala}
// code placeholder
val data = Seq((Array(1, 2, 3)))
val df = sc.parallelize(data).toDF("a")
val dfRes = df.select(
transform(
$"a",
(col: Column) => struct(col).alias("struct_alias")
).alias("a")
)
dfRes.printSchema
// root
// |-- a: array (nullable = true)
// | |-- element: struct (containsNull = false)
// | | |-- x: integer (nullable = false)
{code}
I expected the inner element to have the name 'struct_alias'.
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