Github user chenghao-intel commented on a diff in the pull request:
https://github.com/apache/spark/pull/4918#discussion_r25921825
--- 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 --
Yes, that's exactly what I described
https://github.com/apache/spark/pull/4892/files#diff-27c76f96a7b2733ecfd6f46a1716e153R201
But the bug you raised in #4892 is quite interesting
```scala
sqlContext.jsonRDD(sc.parallelize("""{"a": {"a": {"a": 1}}, "c": 1}""" ::
Nil)).registerTempTable("nestedOrder")
sqlContext.sql("SELECT a.a.a FROM nestedOrder ORDER BY a.a.a")
```
Anyway, I will do some investigation on some other database systems other
than Hive.
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