Github user paul-rogers commented on the issue:
https://github.com/apache/drill/pull/866
Let's defer this one so we can focus on the lower layer: the column
accessors for maps and lists (DRILL-5688). Once that PR is done, we'll come
back and update this one with those revisions. Please continue to get familiar
with the concepts here. However, the details will change a bit to allow support
for repeated maps and lists.
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