cloud-fan commented on a change in pull request #28833:
URL: https://github.com/apache/spark/pull/28833#discussion_r448110252
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File path:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/parser/AstBuilder.scala
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@@ -2211,6 +2211,8 @@ class AstBuilder(conf: SQLConf) extends
SqlBaseBaseVisitor[AnyRef] with Logging
DecimalType(precision.getText.toInt, 0)
case ("decimal" | "dec" | "numeric", precision :: scale :: Nil) =>
DecimalType(precision.getText.toInt, scale.getText.toInt)
+ case ("void", Nil) => NullType
+ case ("null", Nil) => NullType
Review comment:
I'm not sure about this. `null` is also a literal syntax, and this may
introduce ambiguity if `null` is also a type name.
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