Github user cloud-fan commented on a diff in the pull request:
https://github.com/apache/spark/pull/21667#discussion_r200629628
--- Diff:
sql/core/src/main/scala/org/apache/spark/sql/execution/datasources/FileFormat.scala
---
@@ -152,6 +152,11 @@ trait FileFormat {
}
}
+ /**
+ * Returns whether this format supports the given [[DataType]] in
read/write path.
+ * By default all data types are supported.
+ */
+ def supportDataType(dataType: DataType, isReadPath: Boolean): Boolean =
true
--- End diff --
This is the only way to allow avro to define its supported types. BTW the
default true value here is good for compatibility: if a file source doesn't
know this API, it doesn't need to implement it and the behavior is unchanged,
which is, no check applied.
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