Github user jihoonson commented on the pull request:
https://github.com/apache/tajo/pull/756#issuecomment-142364353
Thank you for your review.
As the answer for your question, the ```already known information``` has a
higher priority. For example, if the nested column name of a table of
self-describing format has the same name with a database or a table, the
database name (or the table name) has a higher priority than nested column name
because it is already known information.
However, the table has a predefined schema, NameResolver follows the
existing routine even though the query involves a column of nested type.
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