Github user davies commented on a diff in the pull request:
https://github.com/apache/spark/pull/5350#discussion_r28019159
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/SpecificMutableRow.scala
---
@@ -202,6 +221,8 @@ final class SpecificMutableRow(val values:
Array[MutableValue]) extends MutableR
case DoubleType => new MutableDouble
case BooleanType => new MutableBoolean
case LongType => new MutableLong
+ // TODO(davies): enable this
+ // case StringType => new MutableString
--- End diff --
We need more thinking about reuse the UTF8String object, it's not a trivial
decision, so I'd like to leave this out of this PR.
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