Github user marmbrus commented on a diff in the pull request:
https://github.com/apache/spark/pull/6178#discussion_r30538755
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/analysis/Analyzer.scala
---
@@ -576,6 +576,13 @@ class Analyzer(
/** Extracts a [[Generator]] expression and any names assigned by
aliases to their output. */
private object AliasedGenerator {
def unapply(e: Expression): Option[(Generator, Seq[String])] = e
match {
+ case Alias(g: Generator, name) if g.elementTypes.size > 1 => {
--- End diff --
I think the real fix is to stop setting defaults in in the parser and
instead let the analyzer do it (as we do with MultiAlias today). However,
thats a pretty big change, so I'd be okay just checking with a regex here for
now.
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