Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/4918#discussion_r25920732
--- Diff: sql/core/src/test/scala/org/apache/spark/sql/SQLQuerySuite.scala
---
@@ -1049,4 +1049,14 @@ class SQLQuerySuite extends QueryTest with
BeforeAndAfterAll {
rdd.toDF().registerTempTable("distinctData")
checkAnswer(sql("SELECT COUNT(DISTINCT key,value) FROM distinctData"),
Row(2))
}
+
+ test("SPARK-6145: ORDER BY test for nested fields") {
+ jsonRDD(sparkContext.makeRDD(
+ """{"a": {"b": 1, "a": {"a": 1}}, "c": [{"d": 1}]}""" ::
Nil)).registerTempTable("nestedOrder")
+ // These should be successfully analyzed
+ sql("SELECT 1 FROM nestedOrder ORDER BY a.b").queryExecution.analyzed
+ sql("SELECT a.b FROM nestedOrder ORDER BY a.b").queryExecution.analyzed
+ sql("SELECT 1 FROM nestedOrder ORDER BY a.a.a").queryExecution.analyzed
+ sql("SELECT 1 FROM nestedOrder ORDER BY
c[0].d").queryExecution.analyzed
--- End diff --
Supports ordering more than attributes from the SELECT clause should be the
feature of Spark SQL, so seems we may not able to keep the same name convention
as Hive does for the nested data accessing, but will that break lots of stuff?
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