[HACKERS] doubts about toast_flatten_tuple_attribute/heap_form_tuple

[Zdenek Kotala]

I'm trying write tuple conversion function and now I'm hit problem with 
composite data types. Composite data types can contain inner composite 
data types. Is there any limit? And I found that heap_form_tuple calls 
 toast_flatten_tuple_attribute only one level composite type. Is it bug?

        Thanks Zdenek

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