Github user AndreSchumacher commented on a diff in the pull request:
https://github.com/apache/spark/pull/360#discussion_r11986096
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypes.scala
---
@@ -52,6 +52,7 @@ case class GetItem(child: Expression, ordinal:
Expression) extends Expression {
}
} else {
val baseValue = child.eval(input).asInstanceOf[Map[Any, _]]
+ // TODO: recover key type!!
--- End diff --
`MapType` records the type of the key. I was wondering whether one should
use that instead if possible and not just Any. The comment relates to the other
comments inside the resolver.
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