Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/5798#discussion_r29412354
--- Diff:
sql/hive/src/test/scala/org/apache/spark/sql/hive/execution/HiveResolutionSuite.scala
---
@@ -81,9 +81,11 @@ class HiveResolutionSuite extends HiveComparisonTest {
.toDF().registerTempTable("caseSensitivityTest")
val query = sql("SELECT a, b, A, B, n.a, n.b, n.A, n.B FROM
caseSensitivityTest")
- assert(query.schema.fields.map(_.name) === Seq("a", "b", "A", "B",
"a", "b", "A", "B"),
+ assert(query.schema.fields.map(_.name) === Seq("a", "B", "a", "B",
"a", "b", "A", "B"),
--- End diff --
Does that matter for a case-insensitive system?
But we do need keep the attribute name identical in the references chain.
This is a workaround approach for the bug fixing, in long term, we probably
need to refactor the AttributeReference `equality` for name (or take the
Resolver in?).
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