Github user rxin commented on a diff in the pull request:
https://github.com/apache/spark/pull/1118#discussion_r13936033
--- Diff:
sql/hive/src/main/scala/org/apache/spark/sql/hive/execution/hiveOperators.scala
---
@@ -445,7 +445,19 @@ case class NativeCommand(
if (sideEffectResult.size == 0) {
context.emptyResult
} else {
- val rows = sideEffectResult.map(r => new GenericRow(Array[Any](r)))
+ // TODO: Need a better way to handle the result of a native command.
+ // We may want to consider to use JsonMetaDataFormatter in Hive.
+ val isDescribe = sql.trim.startsWith("describe")
+ val rows = if (isDescribe) {
+ // TODO: If we upgrade Hive to 0.13, we need to check the results
of
+ // context.sessionState.isHiveServerQuery() to determine how to
split the result.
+ // This method is introduced by
https://issues.apache.org/jira/browse/HIVE-4545.
+ // Right now, we split every string by any number of consecutive
spaces.
+ sideEffectResult.map(
+ r => r.split("\\s+")).map(r => new
GenericRow(r.asInstanceOf[Array[Any]]))
--- End diff --
actually for describe can we only split up to 3 columns?
```scala
scala> "a b c d e".split("\\s+", 3)
res2: Array[String] = Array(a, b, c d e)
```
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