Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/10757#discussion_r53120467
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/expressions/complexTypeExtractors.scala
---
@@ -130,12 +134,17 @@ case class GetStructField(child: Expression, ordinal:
Int, name: Option[String]
}
})
}
+}
+
+case class PrettyGetStructField(child: Expression, name: String, dataType:
DataType)
+ extends UnaryExpression with Unevaluable {
- override def sql: String = child.sql + s".`${childSchema(ordinal).name}`"
+ override def sql: String = s"${child.sql}.$name"
--- End diff --
what if we use `transformUp` in `usePrettyExpression`, so that we can make
sure when we generate this string, `child.sql` won't have
back-ticks/double-quotes?
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