Github user cloud-fan commented on the issue:
https://github.com/apache/spark/pull/14444
Sorry I missed this external change. I agree with @hvanhovell that the
default column name is not really a backwards compatibility issue, but I'm also
happy if we can fix it without a lot effort.
How hard is it if we add a flag `isNameGenerated` in `CreateNamedStruct`?
When we create `CreateNamedStruct` directly, the `isNameGenerated` should be
false, when we create it with `CreateStruct.apply`, set it to true. Then in
`CreateNamedStruct.prettyString` we can print `name_struct` or just `struct`
according to this flag.
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