Github user tdas commented on a diff in the pull request:
https://github.com/apache/spark/pull/19196#discussion_r138772306
--- Diff:
sql/core/src/test/scala/org/apache/spark/sql/streaming/FlatMapGroupsWithStateSuite.scala
---
@@ -873,6 +875,96 @@ class FlatMapGroupsWithStateSuite extends
StateStoreMetricsTest with BeforeAndAf
assert(e.getMessage === "The output mode of function should be append
or update")
}
+ test("SPARK-21977: coalesce(1) should still be repartitioned when it has
keyExpressions") {
--- End diff --
what changed code paths this test cover that is not already covered by the
other tests you added.
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