Github user huaxingao commented on a diff in the pull request:
https://github.com/apache/spark/pull/13287#discussion_r123368171
--- Diff:
sql/catalyst/src/main/scala/org/apache/spark/sql/catalyst/trees/TreeNode.scala
---
@@ -594,7 +596,9 @@ abstract class TreeNode[BaseType <: TreeNode[BaseType]]
extends Product {
// returns null if the product type doesn't have a primary
constructor, e.g. HiveFunctionWrapper
case p: Product => try {
--- End diff --
Thank you very much for your reply.
Shall we also allow the JDBCRelation to be converted to JSON like the
following?
```
val jdbcDF = sqlContext.read.format("jdbc").options(
Map("url" -> "jdbc:h2:mem:testdb0;user=testUser;password=testPass",
"dbtable" -> "people")).load().queryExecution.logical.toJSON
```
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