[GitHub] [arrow-datafusion] avantgardnerio commented on a diff in pull request #2813: Optimize `where exists` sub-queries into `aggregate` and `join`

[GitBox <gi...@apache.org>]

avantgardnerio commented on code in PR #2813:
URL: https://github.com/apache/arrow-datafusion/pull/2813#discussion_r910372690


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datafusion/common/src/scalar.rs:
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@@ -37,6 +37,8 @@ use std::{convert::TryFrom, fmt, iter::repeat, sync::Arc};
 
 /// Represents a dynamically typed, nullable single value.
 /// This is the single-valued counter-part of arrow’s `Array`.
+/// https://arrow.apache.org/docs/python/api/datatypes.html
+/// https://github.com/apache/arrow/blob/master/format/Schema.fbs#L354-L375

Review Comment:
   Sorry, this was built upon #2797 . I'll turn this into a draft until that gets merged.



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