ueshin commented on a change in pull request #24232: [SPARK-27297] [SQL] Add
higher order functions to scala API
URL: https://github.com/apache/spark/pull/24232#discussion_r315980998
##########
File path:
sql/core/src/test/scala/org/apache/spark/sql/DataFrameFunctionsSuite.scala
##########
@@ -1917,19 +1921,33 @@ class DataFrameFunctionsSuite extends QueryTest with
SharedSparkSession {
null
).toDF("i")
+ // transform(i, x -> x + 1)
+ val resA = Seq(
+ Row(Seq(2, 10, 9, 8)),
+ Row(Seq(6, 9, 10, 8, 3)),
+ Row(Seq.empty),
+ Row(null))
+
+ // transform(i, (x, i) -> x + i)
+ val resB = Seq(
+ Row(Seq(1, 10, 10, 10)),
+ Row(Seq(5, 9, 11, 10, 6)),
+ Row(Seq.empty),
+ Row(null))
+
def testArrayOfPrimitiveTypeNotContainsNull(): Unit = {
- checkAnswer(df.selectExpr("transform(i, x -> x + 1)"),
- Seq(
- Row(Seq(2, 10, 9, 8)),
- Row(Seq(6, 9, 10, 8, 3)),
- Row(Seq.empty),
- Row(null)))
- checkAnswer(df.selectExpr("transform(i, (x, i) -> x + i)"),
- Seq(
- Row(Seq(1, 10, 10, 10)),
- Row(Seq(5, 9, 11, 10, 6)),
- Row(Seq.empty),
- Row(null)))
+ checkAnswer(df.selectExpr("transform(i, x -> x + 1)"), resA)
+ checkAnswer(df.selectExpr("transform(i, (x, i) -> x + i)"), resB)
+
+ checkAnswer(df.select(transform(col("i"), x => x + 1)), resA)
+ checkAnswer(df.select(transform(col("i"), (x, i) => x + i)), resB)
+
+ checkAnswer(df.select(transform(col("i"), new JFunc {
+ def call(x: Column) = x + 1
+ })), resA)
+ checkAnswer(df.select(transform(col("i"), new JFunc2 {
+ def call(x: Column, i: Column) = x + i
+ })), resB)
Review comment:
The situations between here and `to_json` are not the same.
As for `to_json`, their arguments are `scala.collection.Map` and
`java.util.Map`, so both are needed for the convenience for both Scala and Java
users.
As for these, the arguments are `scala.Function1` and
`org.apache.spark.api.java.function.Function`, Java compiler recognizes both as
SAM (Single Abstract Method) type when resolving `x -> x`, and they are
ambiguous.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
With regards,
Apache Git Services
---------------------------------------------------------------------
To unsubscribe, e-mail: [email protected]
For additional commands, e-mail: [email protected]
