Github user gengliangwang commented on a diff in the pull request:
https://github.com/apache/spark/pull/21667#discussion_r199519380
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormat.scala
---
@@ -152,6 +152,16 @@ trait FileFormat {
}
}
+ /**
+ * Returns whether this format supports the given [[DataType]] in
read/write path.
+ *
+ * By default all data types are supported except
[[CalendarIntervalType]] in write path.
+ */
+ def supportDataType(dataType: DataType, isReadPath: Boolean): Boolean =
dataType match {
--- End diff --
@HyukjinKwon Sorry I don't understand. Do you mean the default case is not
supported?
```
case _ => false
```
But how to make all the external formats work?
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