Github user yongtang commented on a diff in the pull request:
https://github.com/apache/spark/pull/11857#discussion_r56925631
--- Diff:
sql/core/src/test/java/test/org/apache/spark/sql/JavaDataFrameSuite.java ---
@@ -328,7 +328,7 @@ public void testTextLoad() {
@Test
public void testCountMinSketch() {
- Dataset df = context.range(1000);
+ Dataset<Object> df = context.range(1000);
--- End diff --
Hi @rxin If `Dataset<Long>` is used then it seems it will have an issue
with the compiler:
```
[error] ...spark/sql/JavaDataFrameSuite.java:331: error: incompatible types:
Dataset<Object> cannot be converted to Dataset<Long>
[error] Dataset<Long> df = context.range(1000);
```
I will use `Dataset<?>` for now.
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